./move.sh

62 files changed, 18095 insertions, 0 deletions

diff --git a/src/grp-udev/.gitignore b/src/grp-udev/.gitignore
new file mode 100644
index 0000000000..f5d8be3dc1
--- /dev/null
+++ b/src/grp-udev/.gitignore
@@ -0,0 +1,4 @@
+/udev.pc
+/keyboard-keys-from-name.gperf
+/keyboard-keys-from-name.h
+/keyboard-keys-list.txt
diff --git a/src/grp-udev/.vimrc b/src/grp-udev/.vimrc
new file mode 100644
index 0000000000..366fbdca4b
--- /dev/null
+++ b/src/grp-udev/.vimrc
@@ -0,0 +1,4 @@
+" 'set exrc' in ~/.vimrc will read .vimrc from the current directory
+set tabstop=8
+set shiftwidth=8
+set expandtab
diff --git a/src/grp-udev/Makefile b/src/grp-udev/Makefile
new file mode 100644
index 0000000000..cc85f0317f
--- /dev/null
+++ b/src/grp-udev/Makefile
@@ -0,0 +1,72 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+INSTALL_DIRS += \
+	$(sysconfdir)/udev/rules.d
+
+dist_udevrules_DATA += \
+	rules/50-udev-default.rules \
+	rules/60-block.rules \
+	rules/60-drm.rules \
+	rules/60-evdev.rules \
+	rules/60-persistent-storage-tape.rules \
+	rules/60-persistent-input.rules \
+	rules/60-persistent-alsa.rules \
+	rules/60-persistent-storage.rules \
+	rules/60-serial.rules \
+	rules/64-btrfs.rules \
+	rules/70-mouse.rules \
+	rules/75-net-description.rules \
+	rules/78-sound-card.rules \
+	rules/80-net-setup-link.rules
+
+nodist_udevrules_DATA += \
+	rules/99-systemd.rules
+
+udevconfdir = $(sysconfdir)/udev
+dist_udevconf_DATA = \
+	src/udev/udev.conf
+
+pkgconfigdata_DATA += \
+	src/udev/udev.pc
+
+EXTRA_DIST += \
+	rules/99-systemd.rules.in \
+	src/udev/udev.pc.in
+
+EXTRA_DIST += \
+	units/systemd-udevd.service.in \
+	units/systemd-udev-trigger.service.in \
+	units/systemd-udev-settle.service.in
+
+SOCKETS_TARGET_WANTS += \
+	systemd-udevd-control.socket \
+	systemd-udevd-kernel.socket
+
+SYSINIT_TARGET_WANTS += \
+	systemd-udevd.service \
+	systemd-udev-trigger.service
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/ata_id/Makefile b/src/grp-udev/ata_id/Makefile
new file mode 100644
index 0000000000..00a8c37ac2
--- /dev/null
+++ b/src/grp-udev/ata_id/Makefile
@@ -0,0 +1,35 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+ata_id_SOURCES = \
+	src/udev/ata_id/ata_id.c
+
+ata_id_LDADD = \
+	libshared.la
+
+udevlibexec_PROGRAMS += \
+	ata_id
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/ata_id/ata_id.c b/src/grp-udev/ata_id/ata_id.c
new file mode 100644
index 0000000000..1e414664ce
--- /dev/null
+++ b/src/grp-udev/ata_id/ata_id.c
@@ -0,0 +1,674 @@
+/*
+ * ata_id - reads product/serial number from ATA drives
+ *
+ * Copyright (C) 2005-2008 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2009 Lennart Poettering <lennart@poettering.net>
+ * Copyright (C) 2009-2010 David Zeuthen <zeuthen@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <linux/bsg.h>
+#include <linux/hdreg.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/sg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "libudev.h"
+
+#include "fd-util.h"
+#include "libudev-private.h"
+#include "log.h"
+#include "udev-util.h"
+
+#define COMMAND_TIMEOUT_MSEC (30 * 1000)
+
+static int disk_scsi_inquiry_command(int      fd,
+                                     void    *buf,
+                                     size_t   buf_len)
+{
+        uint8_t cdb[6] = {
+                /*
+                 * INQUIRY, see SPC-4 section 6.4
+                 */
+                [0] = 0x12,                /* OPERATION CODE: INQUIRY */
+                [3] = (buf_len >> 8),      /* ALLOCATION LENGTH */
+                [4] = (buf_len & 0xff),
+        };
+        uint8_t sense[32] = {};
+        struct sg_io_v4 io_v4 = {
+                .guard = 'Q',
+                .protocol = BSG_PROTOCOL_SCSI,
+                .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
+                .request_len = sizeof(cdb),
+                .request = (uintptr_t) cdb,
+                .max_response_len = sizeof(sense),
+                .response = (uintptr_t) sense,
+                .din_xfer_len = buf_len,
+                .din_xferp = (uintptr_t) buf,
+                .timeout = COMMAND_TIMEOUT_MSEC,
+        };
+        int ret;
+
+        ret = ioctl(fd, SG_IO, &io_v4);
+        if (ret != 0) {
+                /* could be that the driver doesn't do version 4, try version 3 */
+                if (errno == EINVAL) {
+                        struct sg_io_hdr io_hdr = {
+                                .interface_id = 'S',
+                                .cmdp = (unsigned char*) cdb,
+                                .cmd_len = sizeof (cdb),
+                                .dxferp = buf,
+                                .dxfer_len = buf_len,
+                                .sbp = sense,
+                                .mx_sb_len = sizeof(sense),
+                                .dxfer_direction = SG_DXFER_FROM_DEV,
+                                .timeout = COMMAND_TIMEOUT_MSEC,
+                        };
+
+                        ret = ioctl(fd, SG_IO, &io_hdr);
+                        if (ret != 0)
+                                return ret;
+
+                        /* even if the ioctl succeeds, we need to check the return value */
+                        if (!(io_hdr.status == 0 &&
+                              io_hdr.host_status == 0 &&
+                              io_hdr.driver_status == 0)) {
+                                errno = EIO;
+                                return -1;
+                        }
+                } else
+                        return ret;
+        }
+
+        /* even if the ioctl succeeds, we need to check the return value */
+        if (!(io_v4.device_status == 0 &&
+              io_v4.transport_status == 0 &&
+              io_v4.driver_status == 0)) {
+                errno = EIO;
+                return -1;
+        }
+
+        return 0;
+}
+
+static int disk_identify_command(int          fd,
+                                 void         *buf,
+                                 size_t          buf_len)
+{
+        uint8_t cdb[12] = {
+                /*
+                 * ATA Pass-Through 12 byte command, as described in
+                 *
+                 *  T10 04-262r8 ATA Command Pass-Through
+                 *
+                 * from http://www.t10.org/ftp/t10/document.04/04-262r8.pdf
+                 */
+                [0] = 0xa1,     /* OPERATION CODE: 12 byte pass through */
+                [1] = 4 << 1,   /* PROTOCOL: PIO Data-in */
+                [2] = 0x2e,     /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
+                [3] = 0,        /* FEATURES */
+                [4] = 1,        /* SECTORS */
+                [5] = 0,        /* LBA LOW */
+                [6] = 0,        /* LBA MID */
+                [7] = 0,        /* LBA HIGH */
+                [8] = 0 & 0x4F, /* SELECT */
+                [9] = 0xEC,     /* Command: ATA IDENTIFY DEVICE */
+        };
+        uint8_t sense[32] = {};
+        uint8_t *desc = sense + 8;
+        struct sg_io_v4 io_v4 = {
+                .guard = 'Q',
+                .protocol = BSG_PROTOCOL_SCSI,
+                .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
+                .request_len = sizeof(cdb),
+                .request = (uintptr_t) cdb,
+                .max_response_len = sizeof(sense),
+                .response = (uintptr_t) sense,
+                .din_xfer_len = buf_len,
+                .din_xferp = (uintptr_t) buf,
+                .timeout = COMMAND_TIMEOUT_MSEC,
+        };
+        int ret;
+
+        ret = ioctl(fd, SG_IO, &io_v4);
+        if (ret != 0) {
+                /* could be that the driver doesn't do version 4, try version 3 */
+                if (errno == EINVAL) {
+                        struct sg_io_hdr io_hdr = {
+                                .interface_id = 'S',
+                                .cmdp = (unsigned char*) cdb,
+                                .cmd_len = sizeof (cdb),
+                                .dxferp = buf,
+                                .dxfer_len = buf_len,
+                                .sbp = sense,
+                                .mx_sb_len = sizeof (sense),
+                                .dxfer_direction = SG_DXFER_FROM_DEV,
+                                .timeout = COMMAND_TIMEOUT_MSEC,
+                        };
+
+                        ret = ioctl(fd, SG_IO, &io_hdr);
+                        if (ret != 0)
+                                return ret;
+                } else
+                        return ret;
+        }
+
+        if (!(sense[0] == 0x72 && desc[0] == 0x9 && desc[1] == 0x0c)) {
+                errno = EIO;
+                return -1;
+        }
+
+        return 0;
+}
+
+static int disk_identify_packet_device_command(int          fd,
+                                               void         *buf,
+                                               size_t          buf_len)
+{
+        uint8_t cdb[16] = {
+                /*
+                 * ATA Pass-Through 16 byte command, as described in
+                 *
+                 *  T10 04-262r8 ATA Command Pass-Through
+                 *
+                 * from http://www.t10.org/ftp/t10/document.04/04-262r8.pdf
+                 */
+                [0] = 0x85,   /* OPERATION CODE: 16 byte pass through */
+                [1] = 4 << 1, /* PROTOCOL: PIO Data-in */
+                [2] = 0x2e,   /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
+                [3] = 0,      /* FEATURES */
+                [4] = 0,      /* FEATURES */
+                [5] = 0,      /* SECTORS */
+                [6] = 1,      /* SECTORS */
+                [7] = 0,      /* LBA LOW */
+                [8] = 0,      /* LBA LOW */
+                [9] = 0,      /* LBA MID */
+                [10] = 0,     /* LBA MID */
+                [11] = 0,     /* LBA HIGH */
+                [12] = 0,     /* LBA HIGH */
+                [13] = 0,     /* DEVICE */
+                [14] = 0xA1,  /* Command: ATA IDENTIFY PACKET DEVICE */
+                [15] = 0,     /* CONTROL */
+        };
+        uint8_t sense[32] = {};
+        uint8_t *desc = sense + 8;
+        struct sg_io_v4 io_v4 = {
+                .guard = 'Q',
+                .protocol = BSG_PROTOCOL_SCSI,
+                .subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD,
+                .request_len = sizeof (cdb),
+                .request = (uintptr_t) cdb,
+                .max_response_len = sizeof (sense),
+                .response = (uintptr_t) sense,
+                .din_xfer_len = buf_len,
+                .din_xferp = (uintptr_t) buf,
+                .timeout = COMMAND_TIMEOUT_MSEC,
+        };
+        int ret;
+
+        ret = ioctl(fd, SG_IO, &io_v4);
+        if (ret != 0) {
+                /* could be that the driver doesn't do version 4, try version 3 */
+                if (errno == EINVAL) {
+                        struct sg_io_hdr io_hdr = {
+                                .interface_id = 'S',
+                                .cmdp = (unsigned char*) cdb,
+                                .cmd_len = sizeof (cdb),
+                                .dxferp = buf,
+                                .dxfer_len = buf_len,
+                                .sbp = sense,
+                                .mx_sb_len = sizeof (sense),
+                                .dxfer_direction = SG_DXFER_FROM_DEV,
+                                .timeout = COMMAND_TIMEOUT_MSEC,
+                        };
+
+                        ret = ioctl(fd, SG_IO, &io_hdr);
+                        if (ret != 0)
+                                return ret;
+                } else
+                        return ret;
+        }
+
+        if (!(sense[0] == 0x72 && desc[0] == 0x9 && desc[1] == 0x0c)) {
+                errno = EIO;
+                return -1;
+        }
+
+        return 0;
+}
+
+/**
+ * disk_identify_get_string:
+ * @identify: A block of IDENTIFY data
+ * @offset_words: Offset of the string to get, in words.
+ * @dest: Destination buffer for the string.
+ * @dest_len: Length of destination buffer, in bytes.
+ *
+ * Copies the ATA string from @identify located at @offset_words into @dest.
+ */
+static void disk_identify_get_string(uint8_t identify[512],
+                                     unsigned int offset_words,
+                                     char *dest,
+                                     size_t dest_len)
+{
+        unsigned int c1;
+        unsigned int c2;
+
+        while (dest_len > 0) {
+                c1 = identify[offset_words * 2 + 1];
+                c2 = identify[offset_words * 2];
+                *dest = c1;
+                dest++;
+                *dest = c2;
+                dest++;
+                offset_words++;
+                dest_len -= 2;
+        }
+}
+
+static void disk_identify_fixup_string(uint8_t identify[512],
+                                       unsigned int offset_words,
+                                       size_t len)
+{
+        disk_identify_get_string(identify, offset_words,
+                                 (char *) identify + offset_words * 2, len);
+}
+
+static void disk_identify_fixup_uint16 (uint8_t identify[512], unsigned int offset_words)
+{
+        uint16_t *p;
+
+        p = (uint16_t *) identify;
+        p[offset_words] = le16toh (p[offset_words]);
+}
+
+/**
+ * disk_identify:
+ * @udev: The libudev context.
+ * @fd: File descriptor for the block device.
+ * @out_identify: Return location for IDENTIFY data.
+ * @out_is_packet_device: Return location for whether returned data is from a IDENTIFY PACKET DEVICE.
+ *
+ * Sends the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command to the
+ * device represented by @fd. If successful, then the result will be
+ * copied into @out_identify and @out_is_packet_device.
+ *
+ * This routine is based on code from libatasmart, Copyright 2008
+ * Lennart Poettering, LGPL v2.1.
+ *
+ * Returns: 0 if the data was successfully obtained, otherwise
+ * non-zero with errno set.
+ */
+static int disk_identify(struct udev *udev,
+                         int fd,
+                         uint8_t out_identify[512],
+                         int *out_is_packet_device)
+{
+        int ret;
+        uint8_t inquiry_buf[36];
+        int peripheral_device_type;
+        int all_nul_bytes;
+        int n;
+        int is_packet_device = 0;
+
+        /* init results */
+        memzero(out_identify, 512);
+
+        /* If we were to use ATA PASS_THROUGH (12) on an ATAPI device
+         * we could accidentally blank media. This is because MMC's BLANK
+         * command has the same op-code (0x61).
+         *
+         * To prevent this from happening we bail out if the device
+         * isn't a Direct Access Block Device, e.g. SCSI type 0x00
+         * (CD/DVD devices are type 0x05). So we send a SCSI INQUIRY
+         * command first... libata is handling this via its SCSI
+         * emulation layer.
+         *
+         * This also ensures that we're actually dealing with a device
+         * that understands SCSI commands.
+         *
+         * (Yes, it is a bit perverse that we're tunneling the ATA
+         * command through SCSI and relying on the ATA driver
+         * emulating SCSI well-enough...)
+         *
+         * (See commit 160b069c25690bfb0c785994c7c3710289179107 for
+         * the original bug-fix and see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=556635
+         * for the original bug-report.)
+         */
+        ret = disk_scsi_inquiry_command (fd, inquiry_buf, sizeof (inquiry_buf));
+        if (ret != 0)
+                goto out;
+
+        /* SPC-4, section 6.4.2: Standard INQUIRY data */
+        peripheral_device_type = inquiry_buf[0] & 0x1f;
+        if (peripheral_device_type == 0x05)
+          {
+            is_packet_device = 1;
+            ret = disk_identify_packet_device_command(fd, out_identify, 512);
+            goto check_nul_bytes;
+          }
+        if (peripheral_device_type != 0x00) {
+                ret = -1;
+                errno = EIO;
+                goto out;
+        }
+
+        /* OK, now issue the IDENTIFY DEVICE command */
+        ret = disk_identify_command(fd, out_identify, 512);
+        if (ret != 0)
+                goto out;
+
+ check_nul_bytes:
+         /* Check if IDENTIFY data is all NUL bytes - if so, bail */
+        all_nul_bytes = 1;
+        for (n = 0; n < 512; n++) {
+                if (out_identify[n] != '\0') {
+                        all_nul_bytes = 0;
+                        break;
+                }
+        }
+
+        if (all_nul_bytes) {
+                ret = -1;
+                errno = EIO;
+                goto out;
+        }
+
+out:
+        if (out_is_packet_device != NULL)
+                *out_is_packet_device = is_packet_device;
+        return ret;
+}
+
+int main(int argc, char *argv[])
+{
+        _cleanup_udev_unref_ struct udev *udev = NULL;
+        struct hd_driveid id;
+        union {
+                uint8_t  byte[512];
+                uint16_t wyde[256];
+        } identify;
+        char model[41];
+        char model_enc[256];
+        char serial[21];
+        char revision[9];
+        const char *node = NULL;
+        int export = 0;
+        _cleanup_close_ int fd = -1;
+        uint16_t word;
+        int is_packet_device = 0;
+        static const struct option options[] = {
+                { "export", no_argument, NULL, 'x' },
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+
+        log_parse_environment();
+        log_open();
+
+        udev = udev_new();
+        if (udev == NULL)
+                return 0;
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "xh", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'x':
+                        export = 1;
+                        break;
+                case 'h':
+                        printf("Usage: ata_id [--export] [--help] <device>\n"
+                               "  -x,--export    print values as environment keys\n"
+                               "  -h,--help      print this help text\n\n");
+                        return 0;
+                }
+        }
+
+        node = argv[optind];
+        if (node == NULL) {
+                log_error("no node specified");
+                return 1;
+        }
+
+        fd = open(node, O_RDONLY|O_NONBLOCK|O_CLOEXEC);
+        if (fd < 0) {
+                log_error("unable to open '%s'", node);
+                return 1;
+        }
+
+        if (disk_identify(udev, fd, identify.byte, &is_packet_device) == 0) {
+                /*
+                 * fix up only the fields from the IDENTIFY data that we are going to
+                 * use and copy it into the hd_driveid struct for convenience
+                 */
+                disk_identify_fixup_string(identify.byte,  10, 20); /* serial */
+                disk_identify_fixup_string(identify.byte,  23,  8); /* fwrev */
+                disk_identify_fixup_string(identify.byte,  27, 40); /* model */
+                disk_identify_fixup_uint16(identify.byte,  0);      /* configuration */
+                disk_identify_fixup_uint16(identify.byte,  75);     /* queue depth */
+                disk_identify_fixup_uint16(identify.byte,  76);     /* SATA capabilities */
+                disk_identify_fixup_uint16(identify.byte,  82);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  83);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  84);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  85);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  86);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  87);     /* command set supported */
+                disk_identify_fixup_uint16(identify.byte,  89);     /* time required for SECURITY ERASE UNIT */
+                disk_identify_fixup_uint16(identify.byte,  90);     /* time required for enhanced SECURITY ERASE UNIT */
+                disk_identify_fixup_uint16(identify.byte,  91);     /* current APM values */
+                disk_identify_fixup_uint16(identify.byte,  94);     /* current AAM value */
+                disk_identify_fixup_uint16(identify.byte, 108);     /* WWN */
+                disk_identify_fixup_uint16(identify.byte, 109);     /* WWN */
+                disk_identify_fixup_uint16(identify.byte, 110);     /* WWN */
+                disk_identify_fixup_uint16(identify.byte, 111);     /* WWN */
+                disk_identify_fixup_uint16(identify.byte, 128);     /* device lock function */
+                disk_identify_fixup_uint16(identify.byte, 217);     /* nominal media rotation rate */
+                memcpy(&id, identify.byte, sizeof id);
+        } else {
+                /* If this fails, then try HDIO_GET_IDENTITY */
+                if (ioctl(fd, HDIO_GET_IDENTITY, &id) != 0) {
+                        log_debug_errno(errno, "HDIO_GET_IDENTITY failed for '%s': %m", node);
+                        return 2;
+                }
+        }
+
+        memcpy(model, id.model, 40);
+        model[40] = '\0';
+        udev_util_encode_string(model, model_enc, sizeof(model_enc));
+        util_replace_whitespace((char *) id.model, model, 40);
+        util_replace_chars(model, NULL);
+        util_replace_whitespace((char *) id.serial_no, serial, 20);
+        util_replace_chars(serial, NULL);
+        util_replace_whitespace((char *) id.fw_rev, revision, 8);
+        util_replace_chars(revision, NULL);
+
+        if (export) {
+                /* Set this to convey the disk speaks the ATA protocol */
+                printf("ID_ATA=1\n");
+
+                if ((id.config >> 8) & 0x80) {
+                        /* This is an ATAPI device */
+                        switch ((id.config >> 8) & 0x1f) {
+                        case 0:
+                                printf("ID_TYPE=cd\n");
+                                break;
+                        case 1:
+                                printf("ID_TYPE=tape\n");
+                                break;
+                        case 5:
+                                printf("ID_TYPE=cd\n");
+                                break;
+                        case 7:
+                                printf("ID_TYPE=optical\n");
+                                break;
+                        default:
+                                printf("ID_TYPE=generic\n");
+                                break;
+                        }
+                } else {
+                        printf("ID_TYPE=disk\n");
+                }
+                printf("ID_BUS=ata\n");
+                printf("ID_MODEL=%s\n", model);
+                printf("ID_MODEL_ENC=%s\n", model_enc);
+                printf("ID_REVISION=%s\n", revision);
+                if (serial[0] != '\0') {
+                        printf("ID_SERIAL=%s_%s\n", model, serial);
+                        printf("ID_SERIAL_SHORT=%s\n", serial);
+                } else {
+                        printf("ID_SERIAL=%s\n", model);
+                }
+
+                if (id.command_set_1 & (1<<5)) {
+                        printf("ID_ATA_WRITE_CACHE=1\n");
+                        printf("ID_ATA_WRITE_CACHE_ENABLED=%d\n", (id.cfs_enable_1 & (1<<5)) ? 1 : 0);
+                }
+                if (id.command_set_1 & (1<<10)) {
+                        printf("ID_ATA_FEATURE_SET_HPA=1\n");
+                        printf("ID_ATA_FEATURE_SET_HPA_ENABLED=%d\n", (id.cfs_enable_1 & (1<<10)) ? 1 : 0);
+
+                        /*
+                         * TODO: use the READ NATIVE MAX ADDRESS command to get the native max address
+                         * so it is easy to check whether the protected area is in use.
+                         */
+                }
+                if (id.command_set_1 & (1<<3)) {
+                        printf("ID_ATA_FEATURE_SET_PM=1\n");
+                        printf("ID_ATA_FEATURE_SET_PM_ENABLED=%d\n", (id.cfs_enable_1 & (1<<3)) ? 1 : 0);
+                }
+                if (id.command_set_1 & (1<<1)) {
+                        printf("ID_ATA_FEATURE_SET_SECURITY=1\n");
+                        printf("ID_ATA_FEATURE_SET_SECURITY_ENABLED=%d\n", (id.cfs_enable_1 & (1<<1)) ? 1 : 0);
+                        printf("ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=%d\n", id.trseuc * 2);
+                        if ((id.cfs_enable_1 & (1<<1))) /* enabled */ {
+                                if (id.dlf & (1<<8))
+                                        printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=maximum\n");
+                                else
+                                        printf("ID_ATA_FEATURE_SET_SECURITY_LEVEL=high\n");
+                        }
+                        if (id.dlf & (1<<5))
+                                printf("ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=%d\n", id.trsEuc * 2);
+                        if (id.dlf & (1<<4))
+                                printf("ID_ATA_FEATURE_SET_SECURITY_EXPIRE=1\n");
+                        if (id.dlf & (1<<3))
+                                printf("ID_ATA_FEATURE_SET_SECURITY_FROZEN=1\n");
+                        if (id.dlf & (1<<2))
+                                printf("ID_ATA_FEATURE_SET_SECURITY_LOCKED=1\n");
+                }
+                if (id.command_set_1 & (1<<0)) {
+                        printf("ID_ATA_FEATURE_SET_SMART=1\n");
+                        printf("ID_ATA_FEATURE_SET_SMART_ENABLED=%d\n", (id.cfs_enable_1 & (1<<0)) ? 1 : 0);
+                }
+                if (id.command_set_2 & (1<<9)) {
+                        printf("ID_ATA_FEATURE_SET_AAM=1\n");
+                        printf("ID_ATA_FEATURE_SET_AAM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<9)) ? 1 : 0);
+                        printf("ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=%d\n", id.acoustic >> 8);
+                        printf("ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=%d\n", id.acoustic & 0xff);
+                }
+                if (id.command_set_2 & (1<<5)) {
+                        printf("ID_ATA_FEATURE_SET_PUIS=1\n");
+                        printf("ID_ATA_FEATURE_SET_PUIS_ENABLED=%d\n", (id.cfs_enable_2 & (1<<5)) ? 1 : 0);
+                }
+                if (id.command_set_2 & (1<<3)) {
+                        printf("ID_ATA_FEATURE_SET_APM=1\n");
+                        printf("ID_ATA_FEATURE_SET_APM_ENABLED=%d\n", (id.cfs_enable_2 & (1<<3)) ? 1 : 0);
+                        if ((id.cfs_enable_2 & (1<<3)))
+                                printf("ID_ATA_FEATURE_SET_APM_CURRENT_VALUE=%d\n", id.CurAPMvalues & 0xff);
+                }
+                if (id.command_set_2 & (1<<0))
+                        printf("ID_ATA_DOWNLOAD_MICROCODE=1\n");
+
+                /*
+                 * Word 76 indicates the capabilities of a SATA device. A PATA device shall set
+                 * word 76 to 0000h or FFFFh. If word 76 is set to 0000h or FFFFh, then
+                 * the device does not claim compliance with the Serial ATA specification and words
+                 * 76 through 79 are not valid and shall be ignored.
+                 */
+
+                word = identify.wyde[76];
+                if (word != 0x0000 && word != 0xffff) {
+                        printf("ID_ATA_SATA=1\n");
+                        /*
+                         * If bit 2 of word 76 is set to one, then the device supports the Gen2
+                         * signaling rate of 3.0 Gb/s (see SATA 2.6).
+                         *
+                         * If bit 1 of word 76 is set to one, then the device supports the Gen1
+                         * signaling rate of 1.5 Gb/s (see SATA 2.6).
+                         */
+                        if (word & (1<<2))
+                                printf("ID_ATA_SATA_SIGNAL_RATE_GEN2=1\n");
+                        if (word & (1<<1))
+                                printf("ID_ATA_SATA_SIGNAL_RATE_GEN1=1\n");
+                }
+
+                /* Word 217 indicates the nominal media rotation rate of the device */
+                word = identify.wyde[217];
+                if (word == 0x0001)
+                        printf ("ID_ATA_ROTATION_RATE_RPM=0\n"); /* non-rotating e.g. SSD */
+                else if (word >= 0x0401 && word <= 0xfffe)
+                        printf ("ID_ATA_ROTATION_RATE_RPM=%d\n", word);
+
+                /*
+                 * Words 108-111 contain a mandatory World Wide Name (WWN) in the NAA IEEE Registered identifier
+                 * format. Word 108 bits (15:12) shall contain 5h, indicating that the naming authority is IEEE.
+                 * All other values are reserved.
+                 */
+                word = identify.wyde[108];
+                if ((word & 0xf000) == 0x5000) {
+                        uint64_t wwwn;
+
+                        wwwn   = identify.wyde[108];
+                        wwwn <<= 16;
+                        wwwn  |= identify.wyde[109];
+                        wwwn <<= 16;
+                        wwwn  |= identify.wyde[110];
+                        wwwn <<= 16;
+                        wwwn  |= identify.wyde[111];
+                        printf("ID_WWN=0x%1$" PRIx64 "\n"
+                               "ID_WWN_WITH_EXTENSION=0x%1$" PRIx64 "\n",
+                               wwwn);
+                }
+
+                /* from Linux's include/linux/ata.h */
+                if (identify.wyde[0] == 0x848a ||
+                    identify.wyde[0] == 0x844a ||
+                    (identify.wyde[83] & 0xc004) == 0x4004)
+                        printf("ID_ATA_CFA=1\n");
+        } else {
+                if (serial[0] != '\0')
+                        printf("%s_%s\n", model, serial);
+                else
+                        printf("%s\n", model);
+        }
+
+        return 0;
+}
diff --git a/src/grp-udev/cdrom_id/Makefile b/src/grp-udev/cdrom_id/Makefile
new file mode 100644
index 0000000000..a9297413d3
--- /dev/null
+++ b/src/grp-udev/cdrom_id/Makefile
@@ -0,0 +1,38 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+cdrom_id_SOURCES = \
+	src/udev/cdrom_id/cdrom_id.c
+
+cdrom_id_LDADD = \
+	libshared.la
+
+udevlibexec_PROGRAMS += \
+	cdrom_id
+
+dist_udevrules_DATA += \
+	rules/60-cdrom_id.rules
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/cdrom_id/cdrom_id.c b/src/grp-udev/cdrom_id/cdrom_id.c
new file mode 100644
index 0000000000..72f284f710
--- /dev/null
+++ b/src/grp-udev/cdrom_id/cdrom_id.c
@@ -0,0 +1,1085 @@
+/*
+ * cdrom_id - optical drive and media information prober
+ *
+ * Copyright (C) 2008-2010 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <limits.h>
+#include <linux/cdrom.h>
+#include <scsi/sg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "libudev.h"
+
+#include "libudev-private.h"
+#include "random-util.h"
+
+/* device info */
+static unsigned int cd_cd_rom;
+static unsigned int cd_cd_r;
+static unsigned int cd_cd_rw;
+static unsigned int cd_dvd_rom;
+static unsigned int cd_dvd_r;
+static unsigned int cd_dvd_rw;
+static unsigned int cd_dvd_ram;
+static unsigned int cd_dvd_plus_r;
+static unsigned int cd_dvd_plus_rw;
+static unsigned int cd_dvd_plus_r_dl;
+static unsigned int cd_dvd_plus_rw_dl;
+static unsigned int cd_bd;
+static unsigned int cd_bd_r;
+static unsigned int cd_bd_re;
+static unsigned int cd_hddvd;
+static unsigned int cd_hddvd_r;
+static unsigned int cd_hddvd_rw;
+static unsigned int cd_mo;
+static unsigned int cd_mrw;
+static unsigned int cd_mrw_w;
+
+/* media info */
+static unsigned int cd_media;
+static unsigned int cd_media_cd_rom;
+static unsigned int cd_media_cd_r;
+static unsigned int cd_media_cd_rw;
+static unsigned int cd_media_dvd_rom;
+static unsigned int cd_media_dvd_r;
+static unsigned int cd_media_dvd_rw;
+static unsigned int cd_media_dvd_rw_ro; /* restricted overwrite mode */
+static unsigned int cd_media_dvd_rw_seq; /* sequential mode */
+static unsigned int cd_media_dvd_ram;
+static unsigned int cd_media_dvd_plus_r;
+static unsigned int cd_media_dvd_plus_rw;
+static unsigned int cd_media_dvd_plus_r_dl;
+static unsigned int cd_media_dvd_plus_rw_dl;
+static unsigned int cd_media_bd;
+static unsigned int cd_media_bd_r;
+static unsigned int cd_media_bd_re;
+static unsigned int cd_media_hddvd;
+static unsigned int cd_media_hddvd_r;
+static unsigned int cd_media_hddvd_rw;
+static unsigned int cd_media_mo;
+static unsigned int cd_media_mrw;
+static unsigned int cd_media_mrw_w;
+
+static const char *cd_media_state = NULL;
+static unsigned int cd_media_session_next;
+static unsigned int cd_media_session_count;
+static unsigned int cd_media_track_count;
+static unsigned int cd_media_track_count_data;
+static unsigned int cd_media_track_count_audio;
+static unsigned long long int cd_media_session_last_offset;
+
+#define ERRCODE(s)        ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13]))
+#define SK(errcode)        (((errcode) >> 16) & 0xF)
+#define ASC(errcode)        (((errcode) >> 8) & 0xFF)
+#define ASCQ(errcode)        ((errcode) & 0xFF)
+
+static bool is_mounted(const char *device)
+{
+        struct stat statbuf;
+        FILE *fp;
+        int maj, min;
+        bool mounted = false;
+
+        if (stat(device, &statbuf) < 0)
+                return false;
+
+        fp = fopen("/proc/self/mountinfo", "re");
+        if (fp == NULL)
+                return false;
+        while (fscanf(fp, "%*s %*s %i:%i %*[^\n]", &maj, &min) == 2) {
+                if (makedev(maj, min) == statbuf.st_rdev) {
+                        mounted = true;
+                        break;
+                }
+        }
+        fclose(fp);
+        return mounted;
+}
+
+static void info_scsi_cmd_err(struct udev *udev, const char *cmd, int err)
+{
+        if (err == -1) {
+                log_debug("%s failed", cmd);
+                return;
+        }
+        log_debug("%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh", cmd, SK(err), ASC(err), ASCQ(err));
+}
+
+struct scsi_cmd {
+        struct cdrom_generic_command cgc;
+        union {
+                struct request_sense s;
+                unsigned char u[18];
+        } _sense;
+        struct sg_io_hdr sg_io;
+};
+
+static void scsi_cmd_init(struct udev *udev, struct scsi_cmd *cmd)
+{
+        memzero(cmd, sizeof(struct scsi_cmd));
+        cmd->cgc.quiet = 1;
+        cmd->cgc.sense = &cmd->_sense.s;
+        cmd->sg_io.interface_id = 'S';
+        cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
+        cmd->sg_io.cmdp = cmd->cgc.cmd;
+        cmd->sg_io.sbp = cmd->_sense.u;
+        cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
+}
+
+static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, unsigned char arg)
+{
+        cmd->sg_io.cmd_len = i + 1;
+        cmd->cgc.cmd[i] = arg;
+}
+
+#define CHECK_CONDITION 0x01
+
+static int scsi_cmd_run(struct udev *udev, struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize)
+{
+        int ret = 0;
+
+        if (bufsize > 0) {
+                cmd->sg_io.dxferp = buf;
+                cmd->sg_io.dxfer_len = bufsize;
+                cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
+        } else {
+                cmd->sg_io.dxfer_direction = SG_DXFER_NONE;
+        }
+        if (ioctl(fd, SG_IO, &cmd->sg_io))
+                return -1;
+
+        if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) {
+                errno = EIO;
+                ret = -1;
+                if (cmd->sg_io.masked_status & CHECK_CONDITION) {
+                        ret = ERRCODE(cmd->_sense.u);
+                        if (ret == 0)
+                                ret = -1;
+                }
+        }
+        return ret;
+}
+
+static int media_lock(struct udev *udev, int fd, bool lock)
+{
+        int err;
+
+        /* disable the kernel's lock logic */
+        err = ioctl(fd, CDROM_CLEAR_OPTIONS, CDO_LOCK);
+        if (err < 0)
+                log_debug("CDROM_CLEAR_OPTIONS, CDO_LOCK failed");
+
+        err = ioctl(fd, CDROM_LOCKDOOR, lock ? 1 : 0);
+        if (err < 0)
+                log_debug("CDROM_LOCKDOOR failed");
+
+        return err;
+}
+
+static int media_eject(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        int err;
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x1b);
+        scsi_cmd_set(udev, &sc, 4, 0x02);
+        scsi_cmd_set(udev, &sc, 5, 0);
+        err = scsi_cmd_run(udev, &sc, fd, NULL, 0);
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "START_STOP_UNIT", err);
+                return -1;
+        }
+        return 0;
+}
+
+static int cd_capability_compat(struct udev *udev, int fd)
+{
+        int capability;
+
+        capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
+        if (capability < 0) {
+                log_debug("CDROM_GET_CAPABILITY failed");
+                return -1;
+        }
+
+        if (capability & CDC_CD_R)
+                cd_cd_r = 1;
+        if (capability & CDC_CD_RW)
+                cd_cd_rw = 1;
+        if (capability & CDC_DVD)
+                cd_dvd_rom = 1;
+        if (capability & CDC_DVD_R)
+                cd_dvd_r = 1;
+        if (capability & CDC_DVD_RAM)
+                cd_dvd_ram = 1;
+        if (capability & CDC_MRW)
+                cd_mrw = 1;
+        if (capability & CDC_MRW_W)
+                cd_mrw_w = 1;
+        return 0;
+}
+
+static int cd_media_compat(struct udev *udev, int fd)
+{
+        if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) != CDS_DISC_OK) {
+                log_debug("CDROM_DRIVE_STATUS != CDS_DISC_OK");
+                return -1;
+        }
+        cd_media = 1;
+        return 0;
+}
+
+static int cd_inquiry(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        unsigned char inq[128];
+        int err;
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x12);
+        scsi_cmd_set(udev, &sc, 4, 36);
+        scsi_cmd_set(udev, &sc, 5, 0);
+        err = scsi_cmd_run(udev, &sc, fd, inq, 36);
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "INQUIRY", err);
+                return -1;
+        }
+
+        if ((inq[0] & 0x1F) != 5) {
+                log_debug("not an MMC unit");
+                return -1;
+        }
+
+        log_debug("INQUIRY: [%.8s][%.16s][%.4s]", inq + 8, inq + 16, inq + 32);
+        return 0;
+}
+
+static void feature_profile_media(struct udev *udev, int cur_profile)
+{
+        switch (cur_profile) {
+        case 0x03:
+        case 0x04:
+        case 0x05:
+                log_debug("profile 0x%02x ", cur_profile);
+                cd_media = 1;
+                cd_media_mo = 1;
+                break;
+        case 0x08:
+                log_debug("profile 0x%02x media_cd_rom", cur_profile);
+                cd_media = 1;
+                cd_media_cd_rom = 1;
+                break;
+        case 0x09:
+                log_debug("profile 0x%02x media_cd_r", cur_profile);
+                cd_media = 1;
+                cd_media_cd_r = 1;
+                break;
+        case 0x0a:
+                log_debug("profile 0x%02x media_cd_rw", cur_profile);
+                cd_media = 1;
+                cd_media_cd_rw = 1;
+                break;
+        case 0x10:
+                log_debug("profile 0x%02x media_dvd_ro", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_rom = 1;
+                break;
+        case 0x11:
+                log_debug("profile 0x%02x media_dvd_r", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_r = 1;
+                break;
+        case 0x12:
+                log_debug("profile 0x%02x media_dvd_ram", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_ram = 1;
+                break;
+        case 0x13:
+                log_debug("profile 0x%02x media_dvd_rw_ro", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_rw = 1;
+                cd_media_dvd_rw_ro = 1;
+                break;
+        case 0x14:
+                log_debug("profile 0x%02x media_dvd_rw_seq", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_rw = 1;
+                cd_media_dvd_rw_seq = 1;
+                break;
+        case 0x1B:
+                log_debug("profile 0x%02x media_dvd_plus_r", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_plus_r = 1;
+                break;
+        case 0x1A:
+                log_debug("profile 0x%02x media_dvd_plus_rw", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_plus_rw = 1;
+                break;
+        case 0x2A:
+                log_debug("profile 0x%02x media_dvd_plus_rw_dl", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_plus_rw_dl = 1;
+                break;
+        case 0x2B:
+                log_debug("profile 0x%02x media_dvd_plus_r_dl", cur_profile);
+                cd_media = 1;
+                cd_media_dvd_plus_r_dl = 1;
+                break;
+        case 0x40:
+                log_debug("profile 0x%02x media_bd", cur_profile);
+                cd_media = 1;
+                cd_media_bd = 1;
+                break;
+        case 0x41:
+        case 0x42:
+                log_debug("profile 0x%02x media_bd_r", cur_profile);
+                cd_media = 1;
+                cd_media_bd_r = 1;
+                break;
+        case 0x43:
+                log_debug("profile 0x%02x media_bd_re", cur_profile);
+                cd_media = 1;
+                cd_media_bd_re = 1;
+                break;
+        case 0x50:
+                log_debug("profile 0x%02x media_hddvd", cur_profile);
+                cd_media = 1;
+                cd_media_hddvd = 1;
+                break;
+        case 0x51:
+                log_debug("profile 0x%02x media_hddvd_r", cur_profile);
+                cd_media = 1;
+                cd_media_hddvd_r = 1;
+                break;
+        case 0x52:
+                log_debug("profile 0x%02x media_hddvd_rw", cur_profile);
+                cd_media = 1;
+                cd_media_hddvd_rw = 1;
+                break;
+        default:
+                log_debug("profile 0x%02x <ignored>", cur_profile);
+                break;
+        }
+}
+
+static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size)
+{
+        unsigned int i;
+
+        for (i = 0; i+4 <= size; i += 4) {
+                int profile;
+
+                profile = profiles[i] << 8 | profiles[i+1];
+                switch (profile) {
+                case 0x03:
+                case 0x04:
+                case 0x05:
+                        log_debug("profile 0x%02x mo", profile);
+                        cd_mo = 1;
+                        break;
+                case 0x08:
+                        log_debug("profile 0x%02x cd_rom", profile);
+                        cd_cd_rom = 1;
+                        break;
+                case 0x09:
+                        log_debug("profile 0x%02x cd_r", profile);
+                        cd_cd_r = 1;
+                        break;
+                case 0x0A:
+                        log_debug("profile 0x%02x cd_rw", profile);
+                        cd_cd_rw = 1;
+                        break;
+                case 0x10:
+                        log_debug("profile 0x%02x dvd_rom", profile);
+                        cd_dvd_rom = 1;
+                        break;
+                case 0x12:
+                        log_debug("profile 0x%02x dvd_ram", profile);
+                        cd_dvd_ram = 1;
+                        break;
+                case 0x13:
+                case 0x14:
+                        log_debug("profile 0x%02x dvd_rw", profile);
+                        cd_dvd_rw = 1;
+                        break;
+                case 0x1B:
+                        log_debug("profile 0x%02x dvd_plus_r", profile);
+                        cd_dvd_plus_r = 1;
+                        break;
+                case 0x1A:
+                        log_debug("profile 0x%02x dvd_plus_rw", profile);
+                        cd_dvd_plus_rw = 1;
+                        break;
+                case 0x2A:
+                        log_debug("profile 0x%02x dvd_plus_rw_dl", profile);
+                        cd_dvd_plus_rw_dl = 1;
+                        break;
+                case 0x2B:
+                        log_debug("profile 0x%02x dvd_plus_r_dl", profile);
+                        cd_dvd_plus_r_dl = 1;
+                        break;
+                case 0x40:
+                        cd_bd = 1;
+                        log_debug("profile 0x%02x bd", profile);
+                        break;
+                case 0x41:
+                case 0x42:
+                        cd_bd_r = 1;
+                        log_debug("profile 0x%02x bd_r", profile);
+                        break;
+                case 0x43:
+                        cd_bd_re = 1;
+                        log_debug("profile 0x%02x bd_re", profile);
+                        break;
+                case 0x50:
+                        cd_hddvd = 1;
+                        log_debug("profile 0x%02x hddvd", profile);
+                        break;
+                case 0x51:
+                        cd_hddvd_r = 1;
+                        log_debug("profile 0x%02x hddvd_r", profile);
+                        break;
+                case 0x52:
+                        cd_hddvd_rw = 1;
+                        log_debug("profile 0x%02x hddvd_rw", profile);
+                        break;
+                default:
+                        log_debug("profile 0x%02x <ignored>", profile);
+                        break;
+                }
+        }
+        return 0;
+}
+
+/* returns 0 if media was detected */
+static int cd_profiles_old_mmc(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        int err;
+
+        unsigned char header[32];
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x51);
+        scsi_cmd_set(udev, &sc, 8, sizeof(header));
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
+                if (cd_media == 1) {
+                        log_debug("no current profile, but disc is present; assuming CD-ROM");
+                        cd_media_cd_rom = 1;
+                        cd_media_track_count = 1;
+                        cd_media_track_count_data = 1;
+                        return 0;
+                } else {
+                        log_debug("no current profile, assuming no media");
+                        return -1;
+                }
+        };
+
+        cd_media = 1;
+
+        if (header[2] & 16) {
+                cd_media_cd_rw = 1;
+                log_debug("profile 0x0a media_cd_rw");
+        } else if ((header[2] & 3) < 2 && cd_cd_r) {
+                cd_media_cd_r = 1;
+                log_debug("profile 0x09 media_cd_r");
+        } else {
+                cd_media_cd_rom = 1;
+                log_debug("profile 0x08 media_cd_rom");
+        }
+        return 0;
+}
+
+/* returns 0 if media was detected */
+static int cd_profiles(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        unsigned char features[65530];
+        unsigned int cur_profile = 0;
+        unsigned int len;
+        unsigned int i;
+        int err;
+        int ret;
+
+        ret = -1;
+
+        /* First query the current profile */
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x46);
+        scsi_cmd_set(udev, &sc, 8, 8);
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, features, 8);
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+                /* handle pre-MMC2 drives which do not support GET CONFIGURATION */
+                if (SK(err) == 0x5 && (ASC(err) == 0x20 || ASC(err) == 0x24)) {
+                        log_debug("drive is pre-MMC2 and does not support 46h get configuration command");
+                        log_debug("trying to work around the problem");
+                        ret = cd_profiles_old_mmc(udev, fd);
+                }
+                goto out;
+        }
+
+        cur_profile = features[6] << 8 | features[7];
+        if (cur_profile > 0) {
+                log_debug("current profile 0x%02x", cur_profile);
+                feature_profile_media (udev, cur_profile);
+                ret = 0; /* we have media */
+        } else {
+                log_debug("no current profile, assuming no media");
+        }
+
+        len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
+        log_debug("GET CONFIGURATION: size of features buffer 0x%04x", len);
+
+        if (len > sizeof(features)) {
+                log_debug("can not get features in a single query, truncating");
+                len = sizeof(features);
+        } else if (len <= 8)
+                len = sizeof(features);
+
+        /* Now get the full feature buffer */
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x46);
+        scsi_cmd_set(udev, &sc, 7, ( len >> 8 ) & 0xff);
+        scsi_cmd_set(udev, &sc, 8, len & 0xff);
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, features, len);
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+                return -1;
+        }
+
+        /* parse the length once more, in case the drive decided to have other features suddenly :) */
+        len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
+        log_debug("GET CONFIGURATION: size of features buffer 0x%04x", len);
+
+        if (len > sizeof(features)) {
+                log_debug("can not get features in a single query, truncating");
+                len = sizeof(features);
+        }
+
+        /* device features */
+        for (i = 8; i+4 < len; i += (4 + features[i+3])) {
+                unsigned int feature;
+
+                feature = features[i] << 8 | features[i+1];
+
+                switch (feature) {
+                case 0x00:
+                        log_debug("GET CONFIGURATION: feature 'profiles', with %i entries", features[i+3] / 4);
+                        feature_profiles(udev, &features[i]+4, MIN(features[i+3], len - i - 4));
+                        break;
+                default:
+                        log_debug("GET CONFIGURATION: feature 0x%04x <ignored>, with 0x%02x bytes", feature, features[i+3]);
+                        break;
+                }
+        }
+out:
+        return ret;
+}
+
+static int cd_media_info(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        unsigned char header[32];
+        static const char *media_status[] = {
+                "blank",
+                "appendable",
+                "complete",
+                "other"
+        };
+        int err;
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x51);
+        scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff);
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
+                return -1;
+        };
+
+        cd_media = 1;
+        log_debug("disk type %02x", header[8]);
+        log_debug("hardware reported media status: %s", media_status[header[2] & 3]);
+
+        /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
+        if (!cd_media_cd_rom)
+                cd_media_state = media_status[header[2] & 3];
+
+        /* fresh DVD-RW in restricted overwite mode reports itself as
+         * "appendable"; change it to "blank" to make it consistent with what
+         * gets reported after blanking, and what userspace expects  */
+        if (cd_media_dvd_rw_ro && (header[2] & 3) == 1)
+                cd_media_state = media_status[0];
+
+        /* DVD+RW discs (and DVD-RW in restricted mode) once formatted are
+         * always "complete", DVD-RAM are "other" or "complete" if the disc is
+         * write protected; we need to check the contents if it is blank */
+        if ((cd_media_dvd_rw_ro || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
+                unsigned char buffer[32 * 2048];
+                unsigned char len;
+                int offset;
+
+                if (cd_media_dvd_ram) {
+                        /* a write protected dvd-ram may report "complete" status */
+
+                        unsigned char dvdstruct[8];
+                        unsigned char format[12];
+
+                        scsi_cmd_init(udev, &sc);
+                        scsi_cmd_set(udev, &sc, 0, 0xAD);
+                        scsi_cmd_set(udev, &sc, 7, 0xC0);
+                        scsi_cmd_set(udev, &sc, 9, sizeof(dvdstruct));
+                        scsi_cmd_set(udev, &sc, 11, 0);
+                        err = scsi_cmd_run(udev, &sc, fd, dvdstruct, sizeof(dvdstruct));
+                        if ((err != 0)) {
+                                info_scsi_cmd_err(udev, "READ DVD STRUCTURE", err);
+                                return -1;
+                        }
+                        if (dvdstruct[4] & 0x02) {
+                                cd_media_state = media_status[2];
+                                log_debug("write-protected DVD-RAM media inserted");
+                                goto determined;
+                        }
+
+                        /* let's make sure we don't try to read unformatted media */
+                        scsi_cmd_init(udev, &sc);
+                        scsi_cmd_set(udev, &sc, 0, 0x23);
+                        scsi_cmd_set(udev, &sc, 8, sizeof(format));
+                        scsi_cmd_set(udev, &sc, 9, 0);
+                        err = scsi_cmd_run(udev, &sc, fd, format, sizeof(format));
+                        if ((err != 0)) {
+                                info_scsi_cmd_err(udev, "READ DVD FORMAT CAPACITIES", err);
+                                return -1;
+                        }
+
+                        len = format[3];
+                        if (len & 7 || len < 16) {
+                                log_debug("invalid format capacities length");
+                                return -1;
+                        }
+
+                        switch(format[8] & 3) {
+                            case 1:
+                                log_debug("unformatted DVD-RAM media inserted");
+                                /* This means that last format was interrupted
+                                 * or failed, blank dvd-ram discs are factory
+                                 * formatted. Take no action here as it takes
+                                 * quite a while to reformat a dvd-ram and it's
+                                 * not automatically started */
+                                goto determined;
+
+                            case 2:
+                                log_debug("formatted DVD-RAM media inserted");
+                                break;
+
+                            case 3:
+                                cd_media = 0; //return no media
+                                log_debug("format capacities returned no media");
+                                return -1;
+                        }
+                }
+
+                /* Take a closer look at formatted media (unformatted DVD+RW
+                 * has "blank" status", DVD-RAM was examined earlier) and check
+                 * for ISO and UDF PVDs or a fs superblock presence and do it
+                 * in one ioctl (we need just sectors 0 and 16) */
+                scsi_cmd_init(udev, &sc);
+                scsi_cmd_set(udev, &sc, 0, 0x28);
+                scsi_cmd_set(udev, &sc, 5, 0);
+                scsi_cmd_set(udev, &sc, 8, 32);
+                scsi_cmd_set(udev, &sc, 9, 0);
+                err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer));
+                if ((err != 0)) {
+                        cd_media = 0;
+                        info_scsi_cmd_err(udev, "READ FIRST 32 BLOCKS", err);
+                        return -1;
+                }
+
+                /* if any non-zero data is found in sector 16 (iso and udf) or
+                 * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc
+                 * is assumed non-blank */
+
+                for (offset = 32768; offset < (32768 + 2048); offset++) {
+                        if (buffer [offset]) {
+                                log_debug("data in block 16, assuming complete");
+                                goto determined;
+                        }
+                }
+
+                for (offset = 0; offset < 2048; offset++) {
+                        if (buffer [offset]) {
+                                log_debug("data in block 0, assuming complete");
+                                goto determined;
+                        }
+                }
+
+                cd_media_state = media_status[0];
+                log_debug("no data in blocks 0 or 16, assuming blank");
+        }
+
+determined:
+        /* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in
+         * restricted overwrite mode can never append, only in sequential mode */
+        if ((header[2] & 3) < 2 && !cd_media_dvd_rw_ro)
+                cd_media_session_next = header[10] << 8 | header[5];
+        cd_media_session_count = header[9] << 8 | header[4];
+        cd_media_track_count = header[11] << 8 | header[6];
+
+        return 0;
+}
+
+static int cd_media_toc(struct udev *udev, int fd)
+{
+        struct scsi_cmd sc;
+        unsigned char header[12];
+        unsigned char toc[65536];
+        unsigned int len, i, num_tracks;
+        unsigned char *p;
+        int err;
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x43);
+        scsi_cmd_set(udev, &sc, 6, 1);
+        scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff);
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "READ TOC", err);
+                return -1;
+        }
+
+        len = (header[0] << 8 | header[1]) + 2;
+        log_debug("READ TOC: len: %d, start track: %d, end track: %d", len, header[2], header[3]);
+        if (len > sizeof(toc))
+                return -1;
+        if (len < 2)
+                return -1;
+        /* 2: first track, 3: last track */
+        num_tracks = header[3] - header[2] + 1;
+
+        /* empty media has no tracks */
+        if (len < 8)
+                return 0;
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x43);
+        scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
+        scsi_cmd_set(udev, &sc, 7, (len >> 8) & 0xff);
+        scsi_cmd_set(udev, &sc, 8, len & 0xff);
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, toc, len);
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
+                return -1;
+        }
+
+        /* Take care to not iterate beyond the last valid track as specified in
+         * the TOC, but also avoid going beyond the TOC length, just in case
+         * the last track number is invalidly large */
+        for (p = toc+4, i = 4; i < len-8 && num_tracks > 0; i += 8, p += 8, --num_tracks) {
+                unsigned int block;
+                unsigned int is_data_track;
+
+                is_data_track = (p[1] & 0x04) != 0;
+
+                block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
+                log_debug("track=%u info=0x%x(%s) start_block=%u",
+                     p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
+
+                if (is_data_track)
+                        cd_media_track_count_data++;
+                else
+                        cd_media_track_count_audio++;
+        }
+
+        scsi_cmd_init(udev, &sc);
+        scsi_cmd_set(udev, &sc, 0, 0x43);
+        scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
+        scsi_cmd_set(udev, &sc, 8, sizeof(header));
+        scsi_cmd_set(udev, &sc, 9, 0);
+        err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+        if ((err != 0)) {
+                info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
+                return -1;
+        }
+        len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
+        log_debug("last track %u starts at block %u", header[4+2], len);
+        cd_media_session_last_offset = (unsigned long long int)len * 2048;
+        return 0;
+}
+
+int main(int argc, char *argv[])
+{
+        struct udev *udev;
+        static const struct option options[] = {
+                { "lock-media", no_argument, NULL, 'l' },
+                { "unlock-media", no_argument, NULL, 'u' },
+                { "eject-media", no_argument, NULL, 'e' },
+                { "debug", no_argument, NULL, 'd' },
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+        bool eject = false;
+        bool lock = false;
+        bool unlock = false;
+        const char *node = NULL;
+        int fd = -1;
+        int cnt;
+        int rc = 0;
+
+        log_parse_environment();
+        log_open();
+
+        udev = udev_new();
+        if (udev == NULL)
+                goto exit;
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "deluh", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'l':
+                        lock = true;
+                        break;
+                case 'u':
+                        unlock = true;
+                        break;
+                case 'e':
+                        eject = true;
+                        break;
+                case 'd':
+                        log_set_target(LOG_TARGET_CONSOLE);
+                        log_set_max_level(LOG_DEBUG);
+                        log_open();
+                        break;
+                case 'h':
+                        printf("Usage: cdrom_id [options] <device>\n"
+                               "  -l,--lock-media    lock the media (to enable eject request events)\n"
+                               "  -u,--unlock-media  unlock the media\n"
+                               "  -e,--eject-media   eject the media\n"
+                               "  -d,--debug         debug to stderr\n"
+                               "  -h,--help          print this help text\n\n");
+                        goto exit;
+                default:
+                        rc = 1;
+                        goto exit;
+                }
+        }
+
+        node = argv[optind];
+        if (!node) {
+                log_error("no device");
+                fprintf(stderr, "no device\n");
+                rc = 1;
+                goto exit;
+        }
+
+        initialize_srand();
+        for (cnt = 20; cnt > 0; cnt--) {
+                struct timespec duration;
+
+                fd = open(node, O_RDONLY|O_NONBLOCK|O_CLOEXEC|(is_mounted(node) ? 0 : O_EXCL));
+                if (fd >= 0 || errno != EBUSY)
+                        break;
+                duration.tv_sec = 0;
+                duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
+                nanosleep(&duration, NULL);
+        }
+        if (fd < 0) {
+                log_debug("unable to open '%s'", node);
+                fprintf(stderr, "unable to open '%s'\n", node);
+                rc = 1;
+                goto exit;
+        }
+        log_debug("probing: '%s'", node);
+
+        /* same data as original cdrom_id */
+        if (cd_capability_compat(udev, fd) < 0) {
+                rc = 1;
+                goto exit;
+        }
+
+        /* check for media - don't bail if there's no media as we still need to
+         * to read profiles */
+        cd_media_compat(udev, fd);
+
+        /* check if drive talks MMC */
+        if (cd_inquiry(udev, fd) < 0)
+                goto work;
+
+        /* read drive and possibly current profile */
+        if (cd_profiles(udev, fd) != 0)
+                goto work;
+
+        /* at this point we are guaranteed to have media in the drive - find out more about it */
+
+        /* get session/track info */
+        cd_media_toc(udev, fd);
+
+        /* get writable media state */
+        cd_media_info(udev, fd);
+
+work:
+        /* lock the media, so we enable eject button events */
+        if (lock && cd_media) {
+                log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (lock)");
+                media_lock(udev, fd, true);
+        }
+
+        if (unlock && cd_media) {
+                log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)");
+                media_lock(udev, fd, false);
+        }
+
+        if (eject) {
+                log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)");
+                media_lock(udev, fd, false);
+                log_debug("START_STOP_UNIT (eject)");
+                media_eject(udev, fd);
+        }
+
+        printf("ID_CDROM=1\n");
+        if (cd_cd_rom)
+                printf("ID_CDROM_CD=1\n");
+        if (cd_cd_r)
+                printf("ID_CDROM_CD_R=1\n");
+        if (cd_cd_rw)
+                printf("ID_CDROM_CD_RW=1\n");
+        if (cd_dvd_rom)
+                printf("ID_CDROM_DVD=1\n");
+        if (cd_dvd_r)
+                printf("ID_CDROM_DVD_R=1\n");
+        if (cd_dvd_rw)
+                printf("ID_CDROM_DVD_RW=1\n");
+        if (cd_dvd_ram)
+                printf("ID_CDROM_DVD_RAM=1\n");
+        if (cd_dvd_plus_r)
+                printf("ID_CDROM_DVD_PLUS_R=1\n");
+        if (cd_dvd_plus_rw)
+                printf("ID_CDROM_DVD_PLUS_RW=1\n");
+        if (cd_dvd_plus_r_dl)
+                printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
+        if (cd_dvd_plus_rw_dl)
+                printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
+        if (cd_bd)
+                printf("ID_CDROM_BD=1\n");
+        if (cd_bd_r)
+                printf("ID_CDROM_BD_R=1\n");
+        if (cd_bd_re)
+                printf("ID_CDROM_BD_RE=1\n");
+        if (cd_hddvd)
+                printf("ID_CDROM_HDDVD=1\n");
+        if (cd_hddvd_r)
+                printf("ID_CDROM_HDDVD_R=1\n");
+        if (cd_hddvd_rw)
+                printf("ID_CDROM_HDDVD_RW=1\n");
+        if (cd_mo)
+                printf("ID_CDROM_MO=1\n");
+        if (cd_mrw)
+                printf("ID_CDROM_MRW=1\n");
+        if (cd_mrw_w)
+                printf("ID_CDROM_MRW_W=1\n");
+
+        if (cd_media)
+                printf("ID_CDROM_MEDIA=1\n");
+        if (cd_media_mo)
+                printf("ID_CDROM_MEDIA_MO=1\n");
+        if (cd_media_mrw)
+                printf("ID_CDROM_MEDIA_MRW=1\n");
+        if (cd_media_mrw_w)
+                printf("ID_CDROM_MEDIA_MRW_W=1\n");
+        if (cd_media_cd_rom)
+                printf("ID_CDROM_MEDIA_CD=1\n");
+        if (cd_media_cd_r)
+                printf("ID_CDROM_MEDIA_CD_R=1\n");
+        if (cd_media_cd_rw)
+                printf("ID_CDROM_MEDIA_CD_RW=1\n");
+        if (cd_media_dvd_rom)
+                printf("ID_CDROM_MEDIA_DVD=1\n");
+        if (cd_media_dvd_r)
+                printf("ID_CDROM_MEDIA_DVD_R=1\n");
+        if (cd_media_dvd_ram)
+                printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
+        if (cd_media_dvd_rw)
+                printf("ID_CDROM_MEDIA_DVD_RW=1\n");
+        if (cd_media_dvd_plus_r)
+                printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
+        if (cd_media_dvd_plus_rw)
+                printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
+        if (cd_media_dvd_plus_rw_dl)
+                printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
+        if (cd_media_dvd_plus_r_dl)
+                printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
+        if (cd_media_bd)
+                printf("ID_CDROM_MEDIA_BD=1\n");
+        if (cd_media_bd_r)
+                printf("ID_CDROM_MEDIA_BD_R=1\n");
+        if (cd_media_bd_re)
+                printf("ID_CDROM_MEDIA_BD_RE=1\n");
+        if (cd_media_hddvd)
+                printf("ID_CDROM_MEDIA_HDDVD=1\n");
+        if (cd_media_hddvd_r)
+                printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
+        if (cd_media_hddvd_rw)
+                printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
+
+        if (cd_media_state != NULL)
+                printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
+        if (cd_media_session_next > 0)
+                printf("ID_CDROM_MEDIA_SESSION_NEXT=%u\n", cd_media_session_next);
+        if (cd_media_session_count > 0)
+                printf("ID_CDROM_MEDIA_SESSION_COUNT=%u\n", cd_media_session_count);
+        if (cd_media_session_count > 1 && cd_media_session_last_offset > 0)
+                printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);
+        if (cd_media_track_count > 0)
+                printf("ID_CDROM_MEDIA_TRACK_COUNT=%u\n", cd_media_track_count);
+        if (cd_media_track_count_audio > 0)
+                printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%u\n", cd_media_track_count_audio);
+        if (cd_media_track_count_data > 0)
+                printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%u\n", cd_media_track_count_data);
+exit:
+        if (fd >= 0)
+                close(fd);
+        udev_unref(udev);
+        log_close();
+        return rc;
+}
diff --git a/src/grp-udev/collect/Makefile b/src/grp-udev/collect/Makefile
new file mode 100644
index 0000000000..60af3b7627
--- /dev/null
+++ b/src/grp-udev/collect/Makefile
@@ -0,0 +1,35 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+collect_SOURCES = \
+	src/udev/collect/collect.c
+
+collect_LDADD = \
+	libshared.la
+
+udevlibexec_PROGRAMS += \
+	collect
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/collect/collect.c b/src/grp-udev/collect/collect.c
new file mode 100644
index 0000000000..349585b634
--- /dev/null
+++ b/src/grp-udev/collect/collect.c
@@ -0,0 +1,491 @@
+/*
+ * Collect variables across events.
+ *
+ * usage: collect [--add|--remove] <checkpoint> <id> <idlist>
+ *
+ * Adds ID <id> to the list governed by <checkpoint>.
+ * <id> must be part of the ID list <idlist>.
+ * If all IDs given by <idlist> are listed (ie collect has been
+ * invoked for each ID in <idlist>) collect returns 0, the
+ * number of missing IDs otherwise.
+ * A negative number is returned on error.
+ *
+ * Copyright(C) 2007, Hannes Reinecke <hare@suse.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "alloc-util.h"
+#include "libudev-private.h"
+#include "macro.h"
+#include "stdio-util.h"
+#include "string-util.h"
+
+#define BUFSIZE 16
+#define UDEV_ALARM_TIMEOUT 180
+
+enum collect_state {
+        STATE_NONE,
+        STATE_OLD,
+        STATE_CONFIRMED,
+};
+
+struct _mate {
+        struct udev_list_node node;
+        char *name;
+        enum collect_state state;
+};
+
+static struct udev_list_node bunch;
+static int debug;
+
+/* This can increase dynamically */
+static size_t bufsize = BUFSIZE;
+
+static inline struct _mate *node_to_mate(struct udev_list_node *node)
+{
+        return container_of(node, struct _mate, node);
+}
+
+noreturn static void sig_alrm(int signo)
+{
+        exit(4);
+}
+
+static void usage(void)
+{
+        printf("%s [options] <checkpoint> <id> <idlist>\n\n"
+               "Collect variables across events.\n\n"
+               "  -h --help        Print this message\n"
+               "  -a --add         Add ID <id> to the list <idlist>\n"
+               "  -r --remove      Remove ID <id> from the list <idlist>\n"
+               "  -d --debug       Debug to stderr\n\n"
+               "  Adds ID <id> to the list governed by <checkpoint>.\n"
+               "  <id> must be part of the list <idlist>.\n"
+               "  If all IDs given by <idlist> are listed (ie collect has been\n"
+               "  invoked for each ID in <idlist>) collect returns 0, the\n"
+               "  number of missing IDs otherwise.\n"
+               "  On error a negative number is returned.\n\n"
+               , program_invocation_short_name);
+}
+
+/*
+ * prepare
+ *
+ * Prepares the database file
+ */
+static int prepare(char *dir, char *filename)
+{
+        char buf[512];
+        int r, fd;
+
+        r = mkdir(dir, 0700);
+        if (r < 0 && errno != EEXIST)
+                return -errno;
+
+        xsprintf(buf, "%s/%s", dir, filename);
+
+        fd = open(buf,O_RDWR|O_CREAT|O_CLOEXEC, S_IRUSR|S_IWUSR);
+        if (fd < 0)
+                fprintf(stderr, "Cannot open %s: %m\n", buf);
+
+        if (lockf(fd,F_TLOCK,0) < 0) {
+                if (debug)
+                        fprintf(stderr, "Lock taken, wait for %d seconds\n", UDEV_ALARM_TIMEOUT);
+                if (errno == EAGAIN || errno == EACCES) {
+                        alarm(UDEV_ALARM_TIMEOUT);
+                        lockf(fd, F_LOCK, 0);
+                        if (debug)
+                                fprintf(stderr, "Acquired lock on %s\n", buf);
+                } else {
+                        if (debug)
+                                fprintf(stderr, "Could not get lock on %s: %m\n", buf);
+                }
+        }
+
+        return fd;
+}
+
+/*
+ * Read checkpoint file
+ *
+ * Tricky reading this. We allocate a buffer twice as large
+ * as we're going to read. Then we read into the upper half
+ * of that buffer and start parsing.
+ * Once we do _not_ find end-of-work terminator (whitespace
+ * character) we move the upper half to the lower half,
+ * adjust the read pointer and read the next bit.
+ * Quite clever methinks :-)
+ * I should become a programmer ...
+ *
+ * Yes, one could have used fgets() for this. But then we'd
+ * have to use freopen etc which I found quite tedious.
+ */
+static int checkout(int fd)
+{
+        int len;
+        char *buf, *ptr, *word = NULL;
+        struct _mate *him;
+
+ restart:
+        len = bufsize >> 1;
+        buf = malloc(bufsize + 1);
+        if (!buf)
+                return log_oom();
+        memset(buf, ' ', bufsize);
+        buf[bufsize] = '\0';
+
+        ptr = buf + len;
+        while ((read(fd, buf + len, len)) > 0) {
+                while (ptr && *ptr) {
+                        word = ptr;
+                        ptr = strpbrk(word," \n\t\r");
+                        if (!ptr && word < (buf + len)) {
+                                bufsize = bufsize << 1;
+                                if (debug)
+                                        fprintf(stderr, "ID overflow, restarting with size %zu\n", bufsize);
+                                free(buf);
+                                lseek(fd, 0, SEEK_SET);
+                                goto restart;
+                        }
+                        if (ptr) {
+                                *ptr = '\0';
+                                ptr++;
+                                if (!strlen(word))
+                                        continue;
+
+                                if (debug)
+                                        fprintf(stderr, "Found word %s\n", word);
+                                him = malloc(sizeof (struct _mate));
+                                if (!him) {
+                                        free(buf);
+                                        return log_oom();
+                                }
+                                him->name = strdup(word);
+                                if (!him->name) {
+                                        free(buf);
+                                        free(him);
+                                        return log_oom();
+                                }
+                                him->state = STATE_OLD;
+                                udev_list_node_append(&him->node, &bunch);
+                                word = NULL;
+                        }
+                }
+                memcpy(buf, buf + len, len);
+                memset(buf + len, ' ', len);
+
+                if (!ptr)
+                        ptr = word;
+                if (!ptr)
+                        break;
+                ptr -= len;
+        }
+
+        free(buf);
+        return 0;
+}
+
+/*
+ * invite
+ *
+ * Adds a new ID 'us' to the internal list,
+ * marks it as confirmed.
+ */
+static void invite(char *us)
+{
+        struct udev_list_node *him_node;
+        struct _mate *who = NULL;
+
+        if (debug)
+                fprintf(stderr, "Adding ID '%s'\n", us);
+
+        udev_list_node_foreach(him_node, &bunch) {
+                struct _mate *him = node_to_mate(him_node);
+
+                if (streq(him->name, us)) {
+                        him->state = STATE_CONFIRMED;
+                        who = him;
+                }
+        }
+        if (debug && !who)
+                fprintf(stderr, "ID '%s' not in database\n", us);
+
+}
+
+/*
+ * reject
+ *
+ * Marks the ID 'us' as invalid,
+ * causing it to be removed when the
+ * list is written out.
+ */
+static void reject(char *us)
+{
+        struct udev_list_node *him_node;
+        struct _mate *who = NULL;
+
+        if (debug)
+                fprintf(stderr, "Removing ID '%s'\n", us);
+
+        udev_list_node_foreach(him_node, &bunch) {
+                struct _mate *him = node_to_mate(him_node);
+
+                if (streq(him->name, us)) {
+                        him->state = STATE_NONE;
+                        who = him;
+                }
+        }
+        if (debug && !who)
+                fprintf(stderr, "ID '%s' not in database\n", us);
+}
+
+/*
+ * kickout
+ *
+ * Remove all IDs in the internal list which are not part
+ * of the list passed via the command line.
+ */
+static void kickout(void)
+{
+        struct udev_list_node *him_node;
+        struct udev_list_node *tmp;
+
+        udev_list_node_foreach_safe(him_node, tmp, &bunch) {
+                struct _mate *him = node_to_mate(him_node);
+
+                if (him->state == STATE_OLD) {
+                        udev_list_node_remove(&him->node);
+                        free(him->name);
+                        free(him);
+                }
+        }
+}
+
+/*
+ * missing
+ *
+ * Counts all missing IDs in the internal list.
+ */
+static int missing(int fd)
+{
+        char *buf;
+        int ret = 0;
+        struct udev_list_node *him_node;
+
+        buf = malloc(bufsize);
+        if (!buf)
+                return log_oom();
+
+        udev_list_node_foreach(him_node, &bunch) {
+                struct _mate *him = node_to_mate(him_node);
+
+                if (him->state == STATE_NONE) {
+                        ret++;
+                } else {
+                        while (strlen(him->name)+1 >= bufsize) {
+                                char *tmpbuf;
+
+                                bufsize = bufsize << 1;
+                                tmpbuf = realloc(buf, bufsize);
+                                if (!tmpbuf) {
+                                        free(buf);
+                                        return log_oom();
+                                }
+                                buf = tmpbuf;
+                        }
+                        snprintf(buf, strlen(him->name)+2, "%s ", him->name);
+                        if (write(fd, buf, strlen(buf)) < 0) {
+                                free(buf);
+                                return -1;
+                        }
+                }
+        }
+
+        free(buf);
+        return ret;
+}
+
+/*
+ * everybody
+ *
+ * Prints out the status of the internal list.
+ */
+static void everybody(void)
+{
+        struct udev_list_node *him_node;
+        const char *state = "";
+
+        udev_list_node_foreach(him_node, &bunch) {
+                struct _mate *him = node_to_mate(him_node);
+
+                switch (him->state) {
+                case STATE_NONE:
+                        state = "none";
+                        break;
+                case STATE_OLD:
+                        state = "old";
+                        break;
+                case STATE_CONFIRMED:
+                        state = "confirmed";
+                        break;
+                }
+                fprintf(stderr, "ID: %s=%s\n", him->name, state);
+        }
+}
+
+int main(int argc, char **argv)
+{
+        struct udev *udev;
+        static const struct option options[] = {
+                { "add", no_argument, NULL, 'a' },
+                { "remove", no_argument, NULL, 'r' },
+                { "debug", no_argument, NULL, 'd' },
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+        int argi;
+        char *checkpoint, *us;
+        int fd;
+        int i;
+        int ret = EXIT_SUCCESS;
+        int prune = 0;
+        char tmpdir[UTIL_PATH_SIZE];
+
+        udev = udev_new();
+        if (udev == NULL) {
+                ret = EXIT_FAILURE;
+                goto exit;
+        }
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "ardh", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'a':
+                        prune = 0;
+                        break;
+                case 'r':
+                        prune = 1;
+                        break;
+                case 'd':
+                        debug = 1;
+                        break;
+                case 'h':
+                        usage();
+                        goto exit;
+                default:
+                        ret = 1;
+                        goto exit;
+                }
+        }
+
+        argi = optind;
+        if (argi + 2 > argc) {
+                printf("Missing parameter(s)\n");
+                ret = 1;
+                goto exit;
+        }
+        checkpoint = argv[argi++];
+        us = argv[argi++];
+
+        if (signal(SIGALRM, sig_alrm) == SIG_ERR) {
+                fprintf(stderr, "Cannot set SIGALRM: %m\n");
+                ret = 2;
+                goto exit;
+        }
+
+        udev_list_node_init(&bunch);
+
+        if (debug)
+                fprintf(stderr, "Using checkpoint '%s'\n", checkpoint);
+
+        strscpyl(tmpdir, sizeof(tmpdir), "/run/udev/collect", NULL);
+        fd = prepare(tmpdir, checkpoint);
+        if (fd < 0) {
+                ret = 3;
+                goto out;
+        }
+
+        if (checkout(fd) < 0) {
+                ret = 2;
+                goto out;
+        }
+
+        for (i = argi; i < argc; i++) {
+                struct udev_list_node *him_node;
+                struct _mate *who;
+
+                who = NULL;
+                udev_list_node_foreach(him_node, &bunch) {
+                        struct _mate *him = node_to_mate(him_node);
+
+                        if (streq(him->name, argv[i]))
+                                who = him;
+                }
+                if (!who) {
+                        struct _mate *him;
+
+                        if (debug)
+                                fprintf(stderr, "ID %s: not in database\n", argv[i]);
+                        him = new(struct _mate, 1);
+                        if (!him) {
+                                ret = ENOMEM;
+                                goto out;
+                        }
+
+                        him->name = strdup(argv[i]);
+                        if (!him->name) {
+                                free(him);
+                                ret = ENOMEM;
+                                goto out;
+                        }
+
+                        him->state = STATE_NONE;
+                        udev_list_node_append(&him->node, &bunch);
+                } else {
+                        if (debug)
+                                fprintf(stderr, "ID %s: found in database\n", argv[i]);
+                        who->state = STATE_CONFIRMED;
+                }
+        }
+
+        if (prune)
+                reject(us);
+        else
+                invite(us);
+
+        if (debug) {
+                everybody();
+                fprintf(stderr, "Prune lists\n");
+        }
+        kickout();
+
+        lseek(fd, 0, SEEK_SET);
+        ftruncate(fd, 0);
+        ret = missing(fd);
+
+        lockf(fd, F_ULOCK, 0);
+        close(fd);
+out:
+        if (debug)
+                everybody();
+        if (ret >= 0)
+                printf("COLLECT_%s=%d\n", checkpoint, ret);
+exit:
+        udev_unref(udev);
+        return ret;
+}
diff --git a/src/grp-udev/libudev-core/Makefile b/src/grp-udev/libudev-core/Makefile
new file mode 100644
index 0000000000..e95d53120a
--- /dev/null
+++ b/src/grp-udev/libudev-core/Makefile
@@ -0,0 +1,101 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+noinst_LTLIBRARIES += \
+	libudev-core.la
+
+$(outdir)/keyboard-keys-list.txt:
+	$(AM_V_GEN)$(CPP) $(ALL_CPPFLAGS) -dM -include linux/input.h - < /dev/null | $(AWK) '/^#define[ \t]+KEY_[^ ]+[ \t]+[0-9K]/ { if ($$2 != "KEY_MAX") { print $$2 } }' > $@
+
+$(outdir)/keyboard-keys-from-name.gperf: $(outdir)/keyboard-keys-list.txt
+	$(AM_V_GEN)$(AWK) 'BEGIN{ print "struct key { const char* name; unsigned short id; };"; print "%null-strings"; print "%%";} { print tolower(substr($$1 ,5)) ", " $$1 }' < $< > $@
+
+$(outdir)/keyboard-keys-from-name.h: $(outdir)/keyboard-keys-from-name.gperf
+	$(AM_V_GPERF)$(GPERF) -L ANSI-C -t -N keyboard_lookup_key -H hash_key_name -p -C < $< > $@
+
+gperf_txt_sources += \
+	src/udev/keyboard-keys-list.txt
+
+libudev_core_la_SOURCES = \
+	src/udev/udev.h \
+	src/udev/udev-event.c \
+	src/udev/udev-watch.c \
+	src/udev/udev-node.c \
+	src/udev/udev-rules.c \
+	src/udev/udev-ctrl.c \
+	src/udev/udev-builtin.c \
+	src/udev/udev-builtin-btrfs.c \
+	src/udev/udev-builtin-hwdb.c \
+	src/udev/udev-builtin-input_id.c \
+	src/udev/udev-builtin-keyboard.c \
+	src/udev/udev-builtin-net_id.c \
+	src/udev/udev-builtin-net_setup_link.c \
+	src/udev/udev-builtin-path_id.c \
+	src/udev/udev-builtin-usb_id.c \
+	src/udev/net/link-config.h \
+	src/udev/net/link-config.c \
+	src/udev/net/ethtool-util.h \
+	src/udev/net/ethtool-util.c
+
+nodist_libudev_core_la_SOURCES = \
+	src/udev/keyboard-keys-from-name.h \
+	src/udev/net/link-config-gperf.c
+
+gperf_gperf_sources += \
+	src/udev/net/link-config-gperf.gperf
+
+libudev_core_la_CFLAGS = \
+	$(AM_CFLAGS) \
+	$(BLKID_CFLAGS) \
+	$(KMOD_CFLAGS)
+
+libudev_core_la_LIBADD = \
+	libsystemd-network.la \
+	libshared.la \
+	$(BLKID_LIBS) \
+	$(KMOD_LIBS)
+
+ifneq ($(HAVE_KMOD),)
+libudev_core_la_SOURCES += \
+	src/udev/udev-builtin-kmod.c
+
+dist_udevrules_DATA += \
+	rules/80-drivers.rules
+endif # HAVE_KMOD
+
+ifneq ($(HAVE_BLKID),)
+libudev_core_la_SOURCES += \
+	src/udev/udev-builtin-blkid.c
+endif # HAVE_BLKID
+
+ifneq ($(HAVE_ACL),)
+libudev_core_la_SOURCES += \
+	src/udev/udev-builtin-uaccess.c \
+	src/login/logind-acl.c \
+	src/libsystemd/sd-login/sd-login.c \
+	src/systemd/sd-login.h
+endif # HAVE_ACL
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/libudev-core/net/.gitignore b/src/grp-udev/libudev-core/net/.gitignore
new file mode 100644
index 0000000000..9ca85bacc9
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/.gitignore
@@ -0,0 +1 @@
+/link-config-gperf.c
diff --git a/src/grp-udev/libudev-core/net/ethtool-util.c b/src/grp-udev/libudev-core/net/ethtool-util.c
new file mode 100644
index 0000000000..c00ff79123
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/ethtool-util.c
@@ -0,0 +1,208 @@
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+
+#include "conf-parser.h"
+#include "ethtool-util.h"
+#include "log.h"
+#include "string-table.h"
+#include "strxcpyx.h"
+#include "util.h"
+
+static const char* const duplex_table[_DUP_MAX] = {
+        [DUP_FULL] = "full",
+        [DUP_HALF] = "half"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(duplex, Duplex);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_duplex, duplex, Duplex, "Failed to parse duplex setting");
+
+static const char* const wol_table[_WOL_MAX] = {
+        [WOL_PHY] = "phy",
+        [WOL_MAGIC] = "magic",
+        [WOL_OFF] = "off"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(wol, WakeOnLan);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_wol, wol, WakeOnLan, "Failed to parse WakeOnLan setting");
+
+int ethtool_connect(int *ret) {
+        int fd;
+
+        assert_return(ret, -EINVAL);
+
+        fd = socket(PF_INET, SOCK_DGRAM, 0);
+        if (fd < 0)
+                return -errno;
+
+        *ret = fd;
+
+        return 0;
+}
+
+int ethtool_get_driver(int *fd, const char *ifname, char **ret) {
+        struct ethtool_drvinfo ecmd = {
+                .cmd = ETHTOOL_GDRVINFO
+        };
+        struct ifreq ifr = {
+                .ifr_data = (void*) &ecmd
+        };
+        char *d;
+        int r;
+
+        if (*fd < 0) {
+                r = ethtool_connect(fd);
+                if (r < 0)
+                        return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
+        }
+
+        strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
+
+        r = ioctl(*fd, SIOCETHTOOL, &ifr);
+        if (r < 0)
+                return -errno;
+
+        d = strdup(ecmd.driver);
+        if (!d)
+                return -ENOMEM;
+
+        *ret = d;
+        return 0;
+}
+
+int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex) {
+        struct ethtool_cmd ecmd = {
+                .cmd = ETHTOOL_GSET
+        };
+        struct ifreq ifr = {
+                .ifr_data = (void*) &ecmd
+        };
+        bool need_update = false;
+        int r;
+
+        if (speed == 0 && duplex == _DUP_INVALID)
+                return 0;
+
+        if (*fd < 0) {
+                r = ethtool_connect(fd);
+                if (r < 0)
+                        return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
+        }
+
+        strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
+
+        r = ioctl(*fd, SIOCETHTOOL, &ifr);
+        if (r < 0)
+                return -errno;
+
+        if (ethtool_cmd_speed(&ecmd) != speed) {
+                ethtool_cmd_speed_set(&ecmd, speed);
+                need_update = true;
+        }
+
+        switch (duplex) {
+                case DUP_HALF:
+                        if (ecmd.duplex != DUPLEX_HALF) {
+                                ecmd.duplex = DUPLEX_HALF;
+                                need_update = true;
+                        }
+                        break;
+                case DUP_FULL:
+                        if (ecmd.duplex != DUPLEX_FULL) {
+                                ecmd.duplex = DUPLEX_FULL;
+                                need_update = true;
+                        }
+                        break;
+                default:
+                        break;
+        }
+
+        if (need_update) {
+                ecmd.cmd = ETHTOOL_SSET;
+
+                r = ioctl(*fd, SIOCETHTOOL, &ifr);
+                if (r < 0)
+                        return -errno;
+        }
+
+        return 0;
+}
+
+int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
+        struct ethtool_wolinfo ecmd = {
+                .cmd = ETHTOOL_GWOL
+        };
+        struct ifreq ifr = {
+                .ifr_data = (void*) &ecmd
+        };
+        bool need_update = false;
+        int r;
+
+        if (wol == _WOL_INVALID)
+                return 0;
+
+        if (*fd < 0) {
+                r = ethtool_connect(fd);
+                if (r < 0)
+                        return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
+        }
+
+        strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
+
+        r = ioctl(*fd, SIOCETHTOOL, &ifr);
+        if (r < 0)
+                return -errno;
+
+        switch (wol) {
+                case WOL_PHY:
+                        if (ecmd.wolopts != WAKE_PHY) {
+                                ecmd.wolopts = WAKE_PHY;
+                                need_update = true;
+                        }
+                        break;
+                case WOL_MAGIC:
+                        if (ecmd.wolopts != WAKE_MAGIC) {
+                                ecmd.wolopts = WAKE_MAGIC;
+                                need_update = true;
+                        }
+                        break;
+                case WOL_OFF:
+                        if (ecmd.wolopts != 0) {
+                                ecmd.wolopts = 0;
+                                need_update = true;
+                        }
+                        break;
+                default:
+                        break;
+        }
+
+        if (need_update) {
+                ecmd.cmd = ETHTOOL_SWOL;
+
+                r = ioctl(*fd, SIOCETHTOOL, &ifr);
+                if (r < 0)
+                        return -errno;
+        }
+
+        return 0;
+}
diff --git a/src/grp-udev/libudev-core/net/ethtool-util.h b/src/grp-udev/libudev-core/net/ethtool-util.h
new file mode 100644
index 0000000000..7716516e76
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/ethtool-util.h
@@ -0,0 +1,54 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <macro.h>
+
+/* we can't use DUPLEX_ prefix, as it
+ * clashes with <linux/ethtool.h> */
+typedef enum Duplex {
+        DUP_FULL,
+        DUP_HALF,
+        _DUP_MAX,
+        _DUP_INVALID = -1
+} Duplex;
+
+typedef enum WakeOnLan {
+        WOL_PHY,
+        WOL_MAGIC,
+        WOL_OFF,
+        _WOL_MAX,
+        _WOL_INVALID = -1
+} WakeOnLan;
+
+int ethtool_connect(int *ret);
+
+int ethtool_get_driver(int *fd, const char *ifname, char **ret);
+int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex);
+int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol);
+
+const char *duplex_to_string(Duplex d) _const_;
+Duplex duplex_from_string(const char *d) _pure_;
+
+const char *wol_to_string(WakeOnLan wol) _const_;
+WakeOnLan wol_from_string(const char *wol) _pure_;
+
+int config_parse_duplex(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_wol(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-udev/libudev-core/net/link-config-gperf.gperf b/src/grp-udev/libudev-core/net/link-config-gperf.gperf
new file mode 100644
index 0000000000..b25e4b3344
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/link-config-gperf.gperf
@@ -0,0 +1,37 @@
+%{
+#include <stddef.h>
+#include "conf-parser.h"
+#include "network-internal.h"
+#include "link-config.h"
+#include "ethtool-util.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name link_config_gperf_hash
+%define lookup-function-name link_config_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+Match.MACAddress,          config_parse_hwaddr,        0,                             offsetof(link_config, match_mac)
+Match.OriginalName,        config_parse_ifnames,       0,                             offsetof(link_config, match_name)
+Match.Path,                config_parse_strv,          0,                             offsetof(link_config, match_path)
+Match.Driver,              config_parse_strv,          0,                             offsetof(link_config, match_driver)
+Match.Type,                config_parse_strv,          0,                             offsetof(link_config, match_type)
+Match.Host,                config_parse_net_condition, CONDITION_HOST,                offsetof(link_config, match_host)
+Match.Virtualization,      config_parse_net_condition, CONDITION_VIRTUALIZATION,      offsetof(link_config, match_virt)
+Match.KernelCommandLine,   config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(link_config, match_kernel)
+Match.Architecture,        config_parse_net_condition, CONDITION_ARCHITECTURE,        offsetof(link_config, match_arch)
+Link.Description,          config_parse_string,        0,                             offsetof(link_config, description)
+Link.MACAddressPolicy,     config_parse_mac_policy,    0,                             offsetof(link_config, mac_policy)
+Link.MACAddress,           config_parse_hwaddr,        0,                             offsetof(link_config, mac)
+Link.NamePolicy,           config_parse_name_policy,   0,                             offsetof(link_config, name_policy)
+Link.Name,                 config_parse_ifname,        0,                             offsetof(link_config, name)
+Link.Alias,                config_parse_ifalias,       0,                             offsetof(link_config, alias)
+Link.MTUBytes,             config_parse_iec_size,      0,                             offsetof(link_config, mtu)
+Link.BitsPerSecond,        config_parse_si_size,       0,                             offsetof(link_config, speed)
+Link.Duplex,               config_parse_duplex,        0,                             offsetof(link_config, duplex)
+Link.WakeOnLan,            config_parse_wol,           0,                             offsetof(link_config, wol)
diff --git a/src/grp-udev/libudev-core/net/link-config.c b/src/grp-udev/libudev-core/net/link-config.c
new file mode 100644
index 0000000000..350cd24e9c
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/link-config.c
@@ -0,0 +1,519 @@
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+
+#include <systemd/sd-netlink.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "ethtool-util.h"
+#include "fd-util.h"
+#include "libudev-private.h"
+#include "link-config.h"
+#include "log.h"
+#include "missing.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "proc-cmdline.h"
+#include "random-util.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+struct link_config_ctx {
+        LIST_HEAD(link_config, links);
+
+        int ethtool_fd;
+
+        bool enable_name_policy;
+
+        sd_netlink *rtnl;
+
+        usec_t link_dirs_ts_usec;
+};
+
+static const char* const link_dirs[] = {
+        "/etc/systemd/network",
+        "/run/systemd/network",
+        "/usr/lib/systemd/network",
+#ifdef HAVE_SPLIT_USR
+        "/lib/systemd/network",
+#endif
+        NULL};
+
+static void link_config_free(link_config *link) {
+        if (!link)
+                return;
+
+        free(link->filename);
+
+        free(link->match_mac);
+        strv_free(link->match_path);
+        strv_free(link->match_driver);
+        strv_free(link->match_type);
+        free(link->match_name);
+        free(link->match_host);
+        free(link->match_virt);
+        free(link->match_kernel);
+        free(link->match_arch);
+
+        free(link->description);
+        free(link->mac);
+        free(link->name_policy);
+        free(link->name);
+        free(link->alias);
+
+        free(link);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free);
+
+static void link_configs_free(link_config_ctx *ctx) {
+        link_config *link, *link_next;
+
+        if (!ctx)
+                return;
+
+        LIST_FOREACH_SAFE(links, link, link_next, ctx->links)
+                link_config_free(link);
+}
+
+void link_config_ctx_free(link_config_ctx *ctx) {
+        if (!ctx)
+                return;
+
+        safe_close(ctx->ethtool_fd);
+
+        sd_netlink_unref(ctx->rtnl);
+
+        link_configs_free(ctx);
+
+        free(ctx);
+
+        return;
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);
+
+int link_config_ctx_new(link_config_ctx **ret) {
+        _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;
+
+        if (!ret)
+                return -EINVAL;
+
+        ctx = new0(link_config_ctx, 1);
+        if (!ctx)
+                return -ENOMEM;
+
+        LIST_HEAD_INIT(ctx->links);
+
+        ctx->ethtool_fd = -1;
+
+        ctx->enable_name_policy = true;
+
+        *ret = ctx;
+        ctx = NULL;
+
+        return 0;
+}
+
+static int load_link(link_config_ctx *ctx, const char *filename) {
+        _cleanup_(link_config_freep) link_config *link = NULL;
+        _cleanup_fclose_ FILE *file = NULL;
+        int r;
+
+        assert(ctx);
+        assert(filename);
+
+        file = fopen(filename, "re");
+        if (!file) {
+                if (errno == ENOENT)
+                        return 0;
+                else
+                        return -errno;
+        }
+
+        if (null_or_empty_fd(fileno(file))) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        }
+
+        link = new0(link_config, 1);
+        if (!link)
+                return log_oom();
+
+        link->mac_policy = _MACPOLICY_INVALID;
+        link->wol = _WOL_INVALID;
+        link->duplex = _DUP_INVALID;
+
+        r = config_parse(NULL, filename, file,
+                         "Match\0Link\0Ethernet\0",
+                         config_item_perf_lookup, link_config_gperf_lookup,
+                         false, false, true, link);
+        if (r < 0)
+                return r;
+        else
+                log_debug("Parsed configuration file %s", filename);
+
+        if (link->mtu > UINT_MAX || link->speed > UINT_MAX)
+                return -ERANGE;
+
+        link->filename = strdup(filename);
+
+        LIST_PREPEND(links, ctx->links, link);
+        link = NULL;
+
+        return 0;
+}
+
+static bool enable_name_policy(void) {
+        _cleanup_free_ char *line = NULL;
+        const char *word, *state;
+        int r;
+        size_t l;
+
+        r = proc_cmdline(&line);
+        if (r < 0) {
+                log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");
+                return true;
+        }
+
+        FOREACH_WORD_QUOTED(word, l, line, state)
+                if (strneq(word, "net.ifnames=0", l))
+                        return false;
+
+        return true;
+}
+
+int link_config_load(link_config_ctx *ctx) {
+        int r;
+        _cleanup_strv_free_ char **files;
+        char **f;
+
+        link_configs_free(ctx);
+
+        if (!enable_name_policy()) {
+                ctx->enable_name_policy = false;
+                log_info("Network interface NamePolicy= disabled on kernel command line, ignoring.");
+        }
+
+        /* update timestamp */
+        paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, true);
+
+        r = conf_files_list_strv(&files, ".link", NULL, link_dirs);
+        if (r < 0)
+                return log_error_errno(r, "failed to enumerate link files: %m");
+
+        STRV_FOREACH_BACKWARDS(f, files) {
+                r = load_link(ctx, *f);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+bool link_config_should_reload(link_config_ctx *ctx) {
+        return paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, false);
+}
+
+int link_config_get(link_config_ctx *ctx, struct udev_device *device,
+                    link_config **ret) {
+        link_config *link;
+
+        assert(ctx);
+        assert(device);
+        assert(ret);
+
+        LIST_FOREACH(links, link, ctx->links) {
+                const char* attr_value;
+
+                attr_value = udev_device_get_sysattr_value(device, "address");
+
+                if (net_match_config(link->match_mac, link->match_path, link->match_driver,
+                                     link->match_type, link->match_name, link->match_host,
+                                     link->match_virt, link->match_kernel, link->match_arch,
+                                     attr_value ? ether_aton(attr_value) : NULL,
+                                     udev_device_get_property_value(device, "ID_PATH"),
+                                     udev_device_get_driver(udev_device_get_parent(device)),
+                                     udev_device_get_property_value(device, "ID_NET_DRIVER"),
+                                     udev_device_get_devtype(device),
+                                     udev_device_get_sysname(device))) {
+                        if (link->match_name) {
+                                unsigned char name_assign_type = NET_NAME_UNKNOWN;
+
+                                attr_value = udev_device_get_sysattr_value(device, "name_assign_type");
+                                if (attr_value)
+                                        (void) safe_atou8(attr_value, &name_assign_type);
+
+                                if (name_assign_type == NET_NAME_ENUM) {
+                                        log_warning("Config file %s applies to device based on potentially unpredictable interface name '%s'",
+                                                  link->filename, udev_device_get_sysname(device));
+                                        *ret = link;
+
+                                        return 0;
+                                } else if (name_assign_type == NET_NAME_RENAMED) {
+                                        log_warning("Config file %s matches device based on renamed interface name '%s', ignoring",
+                                                  link->filename, udev_device_get_sysname(device));
+
+                                        continue;
+                                }
+                        }
+
+                        log_debug("Config file %s applies to device %s",
+                                  link->filename,  udev_device_get_sysname(device));
+
+                        *ret = link;
+
+                        return 0;
+                }
+        }
+
+        *ret = NULL;
+
+        return -ENOENT;
+}
+
+static bool mac_is_random(struct udev_device *device) {
+        const char *s;
+        unsigned type;
+        int r;
+
+        /* if we can't get the assign type, assume it is not random */
+        s = udev_device_get_sysattr_value(device, "addr_assign_type");
+        if (!s)
+                return false;
+
+        r = safe_atou(s, &type);
+        if (r < 0)
+                return false;
+
+        return type == NET_ADDR_RANDOM;
+}
+
+static bool should_rename(struct udev_device *device, bool respect_predictable) {
+        const char *s;
+        unsigned type;
+        int r;
+
+        /* if we can't get the assgin type, assume we should rename */
+        s = udev_device_get_sysattr_value(device, "name_assign_type");
+        if (!s)
+                return true;
+
+        r = safe_atou(s, &type);
+        if (r < 0)
+                return true;
+
+        switch (type) {
+        case NET_NAME_USER:
+        case NET_NAME_RENAMED:
+                /* these were already named by userspace, do not touch again */
+                return false;
+        case NET_NAME_PREDICTABLE:
+                /* the kernel claims to have given a predictable name */
+                if (respect_predictable)
+                        return false;
+                /* fall through */
+        case NET_NAME_ENUM:
+        default:
+                /* the name is known to be bad, or of an unknown type */
+                return true;
+        }
+}
+
+static int get_mac(struct udev_device *device, bool want_random,
+                   struct ether_addr *mac) {
+        int r;
+
+        if (want_random)
+                random_bytes(mac->ether_addr_octet, ETH_ALEN);
+        else {
+                uint64_t result;
+
+                r = net_get_unique_predictable_data(device, &result);
+                if (r < 0)
+                        return r;
+
+                assert_cc(ETH_ALEN <= sizeof(result));
+                memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
+        }
+
+        /* see eth_random_addr in the kernel */
+        mac->ether_addr_octet[0] &= 0xfe;  /* clear multicast bit */
+        mac->ether_addr_octet[0] |= 0x02;  /* set local assignment bit (IEEE802) */
+
+        return 0;
+}
+
+int link_config_apply(link_config_ctx *ctx, link_config *config,
+                      struct udev_device *device, const char **name) {
+        const char *old_name;
+        const char *new_name = NULL;
+        struct ether_addr generated_mac;
+        struct ether_addr *mac = NULL;
+        bool respect_predictable = false;
+        int r, ifindex;
+
+        assert(ctx);
+        assert(config);
+        assert(device);
+        assert(name);
+
+        old_name = udev_device_get_sysname(device);
+        if (!old_name)
+                return -EINVAL;
+
+        r = ethtool_set_speed(&ctx->ethtool_fd, old_name, config->speed / 1024, config->duplex);
+        if (r < 0)
+                log_warning_errno(r, "Could not set speed or duplex of %s to %zu Mbps (%s): %m",
+                                  old_name, config->speed / 1024,
+                                  duplex_to_string(config->duplex));
+
+        r = ethtool_set_wol(&ctx->ethtool_fd, old_name, config->wol);
+        if (r < 0)
+                log_warning_errno(r, "Could not set WakeOnLan of %s to %s: %m",
+                                  old_name, wol_to_string(config->wol));
+
+        ifindex = udev_device_get_ifindex(device);
+        if (ifindex <= 0) {
+                log_warning("Could not find ifindex");
+                return -ENODEV;
+        }
+
+        if (ctx->enable_name_policy && config->name_policy) {
+                NamePolicy *policy;
+
+                for (policy = config->name_policy;
+                     !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {
+                        switch (*policy) {
+                                case NAMEPOLICY_KERNEL:
+                                        respect_predictable = true;
+                                        break;
+                                case NAMEPOLICY_DATABASE:
+                                        new_name = udev_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE");
+                                        break;
+                                case NAMEPOLICY_ONBOARD:
+                                        new_name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");
+                                        break;
+                                case NAMEPOLICY_SLOT:
+                                        new_name = udev_device_get_property_value(device, "ID_NET_NAME_SLOT");
+                                        break;
+                                case NAMEPOLICY_PATH:
+                                        new_name = udev_device_get_property_value(device, "ID_NET_NAME_PATH");
+                                        break;
+                                case NAMEPOLICY_MAC:
+                                        new_name = udev_device_get_property_value(device, "ID_NET_NAME_MAC");
+                                        break;
+                                default:
+                                        break;
+                        }
+                }
+        }
+
+        if (should_rename(device, respect_predictable)) {
+                /* if not set by policy, fall back manually set name */
+                if (!new_name)
+                        new_name = config->name;
+        } else
+                new_name = NULL;
+
+        switch (config->mac_policy) {
+                case MACPOLICY_PERSISTENT:
+                        if (mac_is_random(device)) {
+                                r = get_mac(device, false, &generated_mac);
+                                if (r == -ENOENT) {
+                                        log_warning_errno(r, "Could not generate persistent MAC address for %s: %m", old_name);
+                                        break;
+                                } else if (r < 0)
+                                        return r;
+                                mac = &generated_mac;
+                        }
+                        break;
+                case MACPOLICY_RANDOM:
+                        if (!mac_is_random(device)) {
+                                r = get_mac(device, true, &generated_mac);
+                                if (r == -ENOENT) {
+                                        log_warning_errno(r, "Could not generate random MAC address for %s: %m", old_name);
+                                        break;
+                                } else if (r < 0)
+                                        return r;
+                                mac = &generated_mac;
+                        }
+                        break;
+                case MACPOLICY_NONE:
+                default:
+                        mac = config->mac;
+        }
+
+        r = rtnl_set_link_properties(&ctx->rtnl, ifindex, config->alias, mac, config->mtu);
+        if (r < 0)
+                return log_warning_errno(r, "Could not set Alias, MACAddress or MTU on %s: %m", old_name);
+
+        *name = new_name;
+
+        return 0;
+}
+
+int link_get_driver(link_config_ctx *ctx, struct udev_device *device, char **ret) {
+        const char *name;
+        char *driver = NULL;
+        int r;
+
+        name = udev_device_get_sysname(device);
+        if (!name)
+                return -EINVAL;
+
+        r = ethtool_get_driver(&ctx->ethtool_fd, name, &driver);
+        if (r < 0)
+                return r;
+
+        *ret = driver;
+        return 0;
+}
+
+static const char* const mac_policy_table[_MACPOLICY_MAX] = {
+        [MACPOLICY_PERSISTENT] = "persistent",
+        [MACPOLICY_RANDOM] = "random",
+        [MACPOLICY_NONE] = "none"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy,
+                         "Failed to parse MAC address policy");
+
+static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
+        [NAMEPOLICY_KERNEL] = "kernel",
+        [NAMEPOLICY_DATABASE] = "database",
+        [NAMEPOLICY_ONBOARD] = "onboard",
+        [NAMEPOLICY_SLOT] = "slot",
+        [NAMEPOLICY_PATH] = "path",
+        [NAMEPOLICY_MAC] = "mac"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
+DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy,
+                          _NAMEPOLICY_INVALID,
+                          "Failed to parse interface name policy");
diff --git a/src/grp-udev/libudev-core/net/link-config.h b/src/grp-udev/libudev-core/net/link-config.h
new file mode 100644
index 0000000000..9df5529d05
--- /dev/null
+++ b/src/grp-udev/libudev-core/net/link-config.h
@@ -0,0 +1,98 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "libudev.h"
+
+#include "condition.h"
+#include "ethtool-util.h"
+#include "list.h"
+
+typedef struct link_config_ctx link_config_ctx;
+typedef struct link_config link_config;
+
+typedef enum MACPolicy {
+        MACPOLICY_PERSISTENT,
+        MACPOLICY_RANDOM,
+        MACPOLICY_NONE,
+        _MACPOLICY_MAX,
+        _MACPOLICY_INVALID = -1
+} MACPolicy;
+
+typedef enum NamePolicy {
+        NAMEPOLICY_KERNEL,
+        NAMEPOLICY_DATABASE,
+        NAMEPOLICY_ONBOARD,
+        NAMEPOLICY_SLOT,
+        NAMEPOLICY_PATH,
+        NAMEPOLICY_MAC,
+        _NAMEPOLICY_MAX,
+        _NAMEPOLICY_INVALID = -1
+} NamePolicy;
+
+struct link_config {
+        char *filename;
+
+        struct ether_addr *match_mac;
+        char **match_path;
+        char **match_driver;
+        char **match_type;
+        char **match_name;
+        Condition *match_host;
+        Condition *match_virt;
+        Condition *match_kernel;
+        Condition *match_arch;
+
+        char *description;
+        struct ether_addr *mac;
+        MACPolicy mac_policy;
+        NamePolicy *name_policy;
+        char *name;
+        char *alias;
+        size_t mtu;
+        size_t speed;
+        Duplex duplex;
+        WakeOnLan wol;
+
+        LIST_FIELDS(link_config, links);
+};
+
+int link_config_ctx_new(link_config_ctx **ret);
+void link_config_ctx_free(link_config_ctx *ctx);
+
+int link_config_load(link_config_ctx *ctx);
+bool link_config_should_reload(link_config_ctx *ctx);
+
+int link_config_get(link_config_ctx *ctx, struct udev_device *device, struct link_config **ret);
+int link_config_apply(link_config_ctx *ctx, struct link_config *config, struct udev_device *device, const char **name);
+
+int link_get_driver(link_config_ctx *ctx, struct udev_device *device, char **ret);
+
+const char *name_policy_to_string(NamePolicy p) _const_;
+NamePolicy name_policy_from_string(const char *p) _pure_;
+
+const char *mac_policy_to_string(MACPolicy p) _const_;
+MACPolicy mac_policy_from_string(const char *p) _pure_;
+
+/* gperf lookup function */
+const struct ConfigPerfItem* link_config_gperf_lookup(const char *key, unsigned length);
+
+int config_parse_mac_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_name_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/grp-udev/libudev-core/udev-builtin-blkid.c b/src/grp-udev/libudev-core/udev-builtin-blkid.c
new file mode 100644
index 0000000000..62cd93264b
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-blkid.c
@@ -0,0 +1,337 @@
+/*
+ * probe disks for filesystems and partitions
+ *
+ * Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <blkid/blkid.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <systemd/sd-id128.h>
+
+#include "alloc-util.h"
+#include "efivars.h"
+#include "fd-util.h"
+#include "gpt.h"
+#include "string-util.h"
+#include "udev.h"
+
+static void print_property(struct udev_device *dev, bool test, const char *name, const char *value) {
+        char s[256];
+
+        s[0] = '\0';
+
+        if (streq(name, "TYPE")) {
+                udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
+
+        } else if (streq(name, "USAGE")) {
+                udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
+
+        } else if (streq(name, "VERSION")) {
+                udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
+
+        } else if (streq(name, "UUID")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
+
+        } else if (streq(name, "UUID_SUB")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
+
+        } else if (streq(name, "LABEL")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
+
+        } else if (streq(name, "PTTYPE")) {
+                udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
+
+        } else if (streq(name, "PTUUID")) {
+                udev_builtin_add_property(dev, test, "ID_PART_TABLE_UUID", value);
+
+        } else if (streq(name, "PART_ENTRY_NAME")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
+
+        } else if (streq(name, "PART_ENTRY_TYPE")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
+
+        } else if (startswith(name, "PART_ENTRY_")) {
+                strscpyl(s, sizeof(s), "ID_", name, NULL);
+                udev_builtin_add_property(dev, test, s, value);
+
+        } else if (streq(name, "SYSTEM_ID")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_SYSTEM_ID", s);
+
+        } else if (streq(name, "PUBLISHER_ID")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_PUBLISHER_ID", s);
+
+        } else if (streq(name, "APPLICATION_ID")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_APPLICATION_ID", s);
+
+        } else if (streq(name, "BOOT_SYSTEM_ID")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_BOOT_SYSTEM_ID", s);
+        }
+}
+
+static int find_gpt_root(struct udev_device *dev, blkid_probe pr, bool test) {
+
+#if defined(GPT_ROOT_NATIVE) && defined(ENABLE_EFI)
+
+        _cleanup_free_ char *root_id = NULL;
+        bool found_esp = false;
+        blkid_partlist pl;
+        int i, nvals, r;
+
+        assert(pr);
+
+        /* Iterate through the partitions on this disk, and see if the
+         * EFI ESP we booted from is on it. If so, find the first root
+         * disk, and add a property indicating its partition UUID. */
+
+        errno = 0;
+        pl = blkid_probe_get_partitions(pr);
+        if (!pl)
+                return errno > 0 ? -errno : -ENOMEM;
+
+        nvals = blkid_partlist_numof_partitions(pl);
+        for (i = 0; i < nvals; i++) {
+                blkid_partition pp;
+                const char *stype, *sid;
+                sd_id128_t type;
+
+                pp = blkid_partlist_get_partition(pl, i);
+                if (!pp)
+                        continue;
+
+                sid = blkid_partition_get_uuid(pp);
+                if (!sid)
+                        continue;
+
+                stype = blkid_partition_get_type_string(pp);
+                if (!stype)
+                        continue;
+
+                if (sd_id128_from_string(stype, &type) < 0)
+                        continue;
+
+                if (sd_id128_equal(type, GPT_ESP)) {
+                        sd_id128_t id, esp;
+                        unsigned long long flags;
+
+                        flags = blkid_partition_get_flags(pp);
+                        if (flags & GPT_FLAG_NO_AUTO)
+                                continue;
+
+                        /* We found an ESP, let's see if it matches
+                         * the ESP we booted from. */
+
+                        if (sd_id128_from_string(sid, &id) < 0)
+                                continue;
+
+                        r = efi_loader_get_device_part_uuid(&esp);
+                        if (r < 0)
+                                return r;
+
+                        if (sd_id128_equal(id, esp))
+                                found_esp = true;
+
+                } else if (sd_id128_equal(type, GPT_ROOT_NATIVE)) {
+
+                        /* We found a suitable root partition, let's
+                         * remember the first one. */
+
+                        if (!root_id) {
+                                root_id = strdup(sid);
+                                if (!root_id)
+                                        return -ENOMEM;
+                        }
+                }
+        }
+
+        /* We found the ESP on this disk, and also found a root
+         * partition, nice! Let's export its UUID */
+        if (found_esp && root_id)
+                udev_builtin_add_property(dev, test, "ID_PART_GPT_AUTO_ROOT_UUID", root_id);
+#endif
+
+        return 0;
+}
+
+static int probe_superblocks(blkid_probe pr) {
+        struct stat st;
+        int rc;
+
+        if (fstat(blkid_probe_get_fd(pr), &st))
+                return -1;
+
+        blkid_probe_enable_partitions(pr, 1);
+
+        if (!S_ISCHR(st.st_mode) &&
+            blkid_probe_get_size(pr) <= 1024 * 1440 &&
+            blkid_probe_is_wholedisk(pr)) {
+                /*
+                 * check if the small disk is partitioned, if yes then
+                 * don't probe for filesystems.
+                 */
+                blkid_probe_enable_superblocks(pr, 0);
+
+                rc = blkid_do_fullprobe(pr);
+                if (rc < 0)
+                        return rc;        /* -1 = error, 1 = nothing, 0 = success */
+
+                if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
+                        return 0;        /* partition table detected */
+        }
+
+        blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
+        blkid_probe_enable_superblocks(pr, 1);
+
+        return blkid_do_safeprobe(pr);
+}
+
+static int builtin_blkid(struct udev_device *dev, int argc, char *argv[], bool test) {
+        const char *root_partition;
+        int64_t offset = 0;
+        bool noraid = false;
+        _cleanup_close_ int fd = -1;
+        blkid_probe pr;
+        const char *data;
+        const char *name;
+        const char *prtype = NULL;
+        int nvals;
+        int i;
+        int err = 0;
+        bool is_gpt = false;
+
+        static const struct option options[] = {
+                { "offset", optional_argument, NULL, 'o' },
+                { "noraid", no_argument, NULL, 'R' },
+                {}
+        };
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "oR", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'o':
+                        offset = strtoull(optarg, NULL, 0);
+                        break;
+                case 'R':
+                        noraid = true;
+                        break;
+                }
+        }
+
+        pr = blkid_new_probe();
+        if (!pr)
+                return EXIT_FAILURE;
+
+        blkid_probe_set_superblocks_flags(pr,
+                BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
+                BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
+                BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION |
+                BLKID_SUBLKS_BADCSUM);
+
+        if (noraid)
+                blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
+
+        fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
+        if (fd < 0) {
+                err = log_debug_errno(errno, "Failure opening block device %s: %m", udev_device_get_devnode(dev));
+                goto out;
+        }
+
+        err = blkid_probe_set_device(pr, fd, offset, 0);
+        if (err < 0)
+                goto out;
+
+        log_debug("probe %s %sraid offset=%"PRIi64,
+                  udev_device_get_devnode(dev),
+                  noraid ? "no" : "", offset);
+
+        err = probe_superblocks(pr);
+        if (err < 0)
+                goto out;
+        if (blkid_probe_has_value(pr, "SBBADCSUM")) {
+                if (!blkid_probe_lookup_value(pr, "TYPE", &prtype, NULL))
+                        log_warning("incorrect %s checksum on %s",
+                                    prtype, udev_device_get_devnode(dev));
+                else
+                        log_warning("incorrect checksum on %s",
+                                    udev_device_get_devnode(dev));
+                goto out;
+        }
+
+        /* If we are a partition then our parent passed on the root
+         * partition UUID to us */
+        root_partition = udev_device_get_property_value(dev, "ID_PART_GPT_AUTO_ROOT_UUID");
+
+        nvals = blkid_probe_numof_values(pr);
+        for (i = 0; i < nvals; i++) {
+                if (blkid_probe_get_value(pr, i, &name, &data, NULL))
+                        continue;
+
+                print_property(dev, test, name, data);
+
+                /* Is this a disk with GPT partition table? */
+                if (streq(name, "PTTYPE") && streq(data, "gpt"))
+                        is_gpt = true;
+
+                /* Is this a partition that matches the root partition
+                 * property we inherited from our parent? */
+                if (root_partition && streq(name, "PART_ENTRY_UUID") && streq(data, root_partition))
+                        udev_builtin_add_property(dev, test, "ID_PART_GPT_AUTO_ROOT", "1");
+        }
+
+        if (is_gpt)
+                find_gpt_root(dev, pr, test);
+
+        blkid_free_probe(pr);
+out:
+        if (err < 0)
+                return EXIT_FAILURE;
+
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_blkid = {
+        .name = "blkid",
+        .cmd = builtin_blkid,
+        .help = "Filesystem and partition probing",
+        .run_once = true,
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-btrfs.c b/src/grp-udev/libudev-core/udev-builtin-btrfs.c
new file mode 100644
index 0000000000..cfaa463804
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-btrfs.c
@@ -0,0 +1,58 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+
+#ifdef HAVE_LINUX_BTRFS_H
+#include <linux/btrfs.h>
+#endif
+
+#include "fd-util.h"
+#include "missing.h"
+#include "string-util.h"
+#include "udev.h"
+
+static int builtin_btrfs(struct udev_device *dev, int argc, char *argv[], bool test) {
+        struct btrfs_ioctl_vol_args args = {};
+        _cleanup_close_ int fd = -1;
+        int err;
+
+        if (argc != 3 || !streq(argv[1], "ready"))
+                return EXIT_FAILURE;
+
+        fd = open("/dev/btrfs-control", O_RDWR|O_CLOEXEC);
+        if (fd < 0)
+                return EXIT_FAILURE;
+
+        strscpy(args.name, sizeof(args.name), argv[2]);
+        err = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
+        if (err < 0)
+                return EXIT_FAILURE;
+
+        udev_builtin_add_property(dev, test, "ID_BTRFS_READY", one_zero(err == 0));
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_btrfs = {
+        .name = "btrfs",
+        .cmd = builtin_btrfs,
+        .help = "btrfs volume management",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-hwdb.c b/src/grp-udev/libudev-core/udev-builtin-hwdb.c
new file mode 100644
index 0000000000..b96f39ba20
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-hwdb.c
@@ -0,0 +1,223 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fnmatch.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <systemd/sd-hwdb.h>
+
+#include "alloc-util.h"
+#include "hwdb-util.h"
+#include "string-util.h"
+#include "udev-util.h"
+#include "udev.h"
+
+static sd_hwdb *hwdb;
+
+int udev_builtin_hwdb_lookup(struct udev_device *dev,
+                             const char *prefix, const char *modalias,
+                             const char *filter, bool test) {
+        _cleanup_free_ char *lookup = NULL;
+        const char *key, *value;
+        int n = 0;
+
+        if (!hwdb)
+                return -ENOENT;
+
+        if (prefix) {
+                lookup = strjoin(prefix, modalias, NULL);
+                if (!lookup)
+                        return -ENOMEM;
+                modalias = lookup;
+        }
+
+        SD_HWDB_FOREACH_PROPERTY(hwdb, modalias, key, value) {
+                if (filter && fnmatch(filter, key, FNM_NOESCAPE) != 0)
+                        continue;
+
+                if (udev_builtin_add_property(dev, test, key, value) < 0)
+                        return -ENOMEM;
+                n++;
+        }
+        return n;
+}
+
+static const char *modalias_usb(struct udev_device *dev, char *s, size_t size) {
+        const char *v, *p;
+        int vn, pn;
+
+        v = udev_device_get_sysattr_value(dev, "idVendor");
+        if (!v)
+                return NULL;
+        p = udev_device_get_sysattr_value(dev, "idProduct");
+        if (!p)
+                return NULL;
+        vn = strtol(v, NULL, 16);
+        if (vn <= 0)
+                return NULL;
+        pn = strtol(p, NULL, 16);
+        if (pn <= 0)
+                return NULL;
+        snprintf(s, size, "usb:v%04Xp%04X*", vn, pn);
+        return s;
+}
+
+static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev,
+                                    const char *subsystem, const char *prefix,
+                                    const char *filter, bool test) {
+        struct udev_device *d;
+        char s[16];
+        bool last = false;
+        int r = 0;
+
+        assert(dev);
+
+        if (!srcdev)
+                srcdev = dev;
+
+        for (d = srcdev; d && !last; d = udev_device_get_parent(d)) {
+                const char *dsubsys;
+                const char *modalias = NULL;
+
+                dsubsys = udev_device_get_subsystem(d);
+                if (!dsubsys)
+                        continue;
+
+                /* look only at devices of a specific subsystem */
+                if (subsystem && !streq(dsubsys, subsystem))
+                        continue;
+
+                modalias = udev_device_get_property_value(d, "MODALIAS");
+
+                if (streq(dsubsys, "usb") && streq_ptr(udev_device_get_devtype(d), "usb_device")) {
+                        /* if the usb_device does not have a modalias, compose one */
+                        if (!modalias)
+                                modalias = modalias_usb(d, s, sizeof(s));
+
+                        /* avoid looking at any parent device, they are usually just a USB hub */
+                        last = true;
+                }
+
+                if (!modalias)
+                        continue;
+
+                r = udev_builtin_hwdb_lookup(dev, prefix, modalias, filter, test);
+                if (r > 0)
+                        break;
+        }
+
+        return r;
+}
+
+static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) {
+        static const struct option options[] = {
+                { "filter", required_argument, NULL, 'f' },
+                { "device", required_argument, NULL, 'd' },
+                { "subsystem", required_argument, NULL, 's' },
+                { "lookup-prefix", required_argument, NULL, 'p' },
+                {}
+        };
+        const char *filter = NULL;
+        const char *device = NULL;
+        const char *subsystem = NULL;
+        const char *prefix = NULL;
+        _cleanup_udev_device_unref_ struct udev_device *srcdev = NULL;
+
+        if (!hwdb)
+                return EXIT_FAILURE;
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "f:d:s:p:", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'f':
+                        filter = optarg;
+                        break;
+
+                case 'd':
+                        device = optarg;
+                        break;
+
+                case 's':
+                        subsystem = optarg;
+                        break;
+
+                case 'p':
+                        prefix = optarg;
+                        break;
+                }
+        }
+
+        /* query a specific key given as argument */
+        if (argv[optind]) {
+                if (udev_builtin_hwdb_lookup(dev, prefix, argv[optind], filter, test) > 0)
+                        return EXIT_SUCCESS;
+                return EXIT_FAILURE;
+        }
+
+        /* read data from another device than the device we will store the data */
+        if (device) {
+                srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device);
+                if (!srcdev)
+                        return EXIT_FAILURE;
+        }
+
+        if (udev_builtin_hwdb_search(dev, srcdev, subsystem, prefix, filter, test) > 0)
+                return EXIT_SUCCESS;
+        return EXIT_FAILURE;
+}
+
+/* called at udev startup and reload */
+static int builtin_hwdb_init(struct udev *udev) {
+        int r;
+
+        if (hwdb)
+                return 0;
+
+        r = sd_hwdb_new(&hwdb);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+/* called on udev shutdown and reload request */
+static void builtin_hwdb_exit(struct udev *udev) {
+        hwdb = sd_hwdb_unref(hwdb);
+}
+
+/* called every couple of seconds during event activity; 'true' if config has changed */
+static bool builtin_hwdb_validate(struct udev *udev) {
+        return hwdb_validate(hwdb);
+}
+
+const struct udev_builtin udev_builtin_hwdb = {
+        .name = "hwdb",
+        .cmd = builtin_hwdb,
+        .init = builtin_hwdb_init,
+        .exit = builtin_hwdb_exit,
+        .validate = builtin_hwdb_validate,
+        .help = "Hardware database",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-input_id.c b/src/grp-udev/libudev-core/udev-builtin-input_id.c
new file mode 100644
index 0000000000..51a55cdbc4
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-input_id.c
@@ -0,0 +1,334 @@
+/*
+ * expose input properties via udev
+ *
+ * Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
+ * Portions Copyright (C) 2004 David Zeuthen, <david@fubar.dk>
+ * Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2014 Carlos Garnacho <carlosg@gnome.org>
+ * Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <linux/limits.h>
+#include <linux/input.h>
+
+#include "fd-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "udev.h"
+#include "util.h"
+
+/* we must use this kernel-compatible implementation */
+#define BITS_PER_LONG (sizeof(unsigned long) * 8)
+#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
+#define OFF(x)  ((x)%BITS_PER_LONG)
+#define BIT(x)  (1UL<<OFF(x))
+#define LONG(x) ((x)/BITS_PER_LONG)
+#define test_bit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)
+
+static inline int abs_size_mm(const struct input_absinfo *absinfo) {
+        /* Resolution is defined to be in units/mm for ABS_X/Y */
+        return (absinfo->maximum - absinfo->minimum) / absinfo->resolution;
+}
+
+static void extract_info(struct udev_device *dev, const char *devpath, bool test) {
+        char width[DECIMAL_STR_MAX(int)], height[DECIMAL_STR_MAX(int)];
+        struct input_absinfo xabsinfo = {}, yabsinfo = {};
+        _cleanup_close_ int fd = -1;
+
+        fd = open(devpath, O_RDONLY|O_CLOEXEC);
+        if (fd < 0)
+                return;
+
+        if (ioctl(fd, EVIOCGABS(ABS_X), &xabsinfo) < 0 ||
+            ioctl(fd, EVIOCGABS(ABS_Y), &yabsinfo) < 0)
+                return;
+
+        if (xabsinfo.resolution <= 0 || yabsinfo.resolution <= 0)
+                return;
+
+        xsprintf(width, "%d", abs_size_mm(&xabsinfo));
+        xsprintf(height, "%d", abs_size_mm(&yabsinfo));
+
+        udev_builtin_add_property(dev, test, "ID_INPUT_WIDTH_MM", width);
+        udev_builtin_add_property(dev, test, "ID_INPUT_HEIGHT_MM", height);
+}
+
+/*
+ * Read a capability attribute and return bitmask.
+ * @param dev udev_device
+ * @param attr sysfs attribute name (e. g. "capabilities/key")
+ * @param bitmask: Output array which has a sizeof of bitmask_size
+ */
+static void get_cap_mask(struct udev_device *dev,
+                         struct udev_device *pdev, const char* attr,
+                         unsigned long *bitmask, size_t bitmask_size,
+                         bool test) {
+        const char *v;
+        char text[4096];
+        unsigned i;
+        char* word;
+        unsigned long val;
+
+        v = udev_device_get_sysattr_value(pdev, attr);
+        if (!v)
+                v = "";
+
+        xsprintf(text, "%s", v);
+        log_debug("%s raw kernel attribute: %s", attr, text);
+
+        memzero(bitmask, bitmask_size);
+        i = 0;
+        while ((word = strrchr(text, ' ')) != NULL) {
+                val = strtoul (word+1, NULL, 16);
+                if (i < bitmask_size/sizeof(unsigned long))
+                        bitmask[i] = val;
+                else
+                        log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);
+                *word = '\0';
+                ++i;
+        }
+        val = strtoul (text, NULL, 16);
+        if (i < bitmask_size / sizeof(unsigned long))
+                bitmask[i] = val;
+        else
+                log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);
+
+        if (test) {
+                /* printf pattern with the right unsigned long number of hex chars */
+                xsprintf(text, "  bit %%4u: %%0%zulX\n",
+                         2 * sizeof(unsigned long));
+                log_debug("%s decoded bit map:", attr);
+                val = bitmask_size / sizeof (unsigned long);
+                /* skip over leading zeros */
+                while (bitmask[val-1] == 0 && val > 0)
+                        --val;
+                for (i = 0; i < val; ++i) {
+                        DISABLE_WARNING_FORMAT_NONLITERAL;
+                        log_debug(text, i * BITS_PER_LONG, bitmask[i]);
+                        REENABLE_WARNING;
+                }
+        }
+}
+
+/* pointer devices */
+static bool test_pointers(struct udev_device *dev,
+                          const unsigned long* bitmask_ev,
+                          const unsigned long* bitmask_abs,
+                          const unsigned long* bitmask_key,
+                          const unsigned long* bitmask_rel,
+                          const unsigned long* bitmask_props,
+                          bool test) {
+        bool has_abs_coordinates = false;
+        bool has_rel_coordinates = false;
+        bool has_mt_coordinates = false;
+        bool has_joystick_axes_or_buttons = false;
+        bool is_direct = false;
+        bool has_touch = false;
+        bool has_3d_coordinates = false;
+        bool has_keys = false;
+        bool stylus_or_pen = false;
+        bool finger_but_no_pen = false;
+        bool has_mouse_button = false;
+        bool is_mouse = false;
+        bool is_touchpad = false;
+        bool is_touchscreen = false;
+        bool is_tablet = false;
+        bool is_joystick = false;
+        bool is_accelerometer = false;
+        bool is_pointing_stick= false;
+
+        has_keys = test_bit(EV_KEY, bitmask_ev);
+        has_abs_coordinates = test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs);
+        has_3d_coordinates = has_abs_coordinates && test_bit(ABS_Z, bitmask_abs);
+        is_accelerometer = test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props);
+
+        if (!has_keys && has_3d_coordinates)
+                is_accelerometer = true;
+
+        if (is_accelerometer) {
+                udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
+                return true;
+        }
+
+        is_pointing_stick = test_bit(INPUT_PROP_POINTING_STICK, bitmask_props);
+        stylus_or_pen = test_bit(BTN_STYLUS, bitmask_key) || test_bit(BTN_TOOL_PEN, bitmask_key);
+        finger_but_no_pen = test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key);
+        has_mouse_button = test_bit(BTN_LEFT, bitmask_key);
+        has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
+        has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);
+
+        /* unset has_mt_coordinates if devices claims to have all abs axis */
+        if (has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
+                has_mt_coordinates = false;
+        is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
+        has_touch = test_bit(BTN_TOUCH, bitmask_key);
+        /* joysticks don't necessarily have buttons; e. g.
+         * rudders/pedals are joystick-like, but buttonless; they have
+         * other fancy axes */
+        has_joystick_axes_or_buttons = test_bit(BTN_TRIGGER, bitmask_key) ||
+                                       test_bit(BTN_A, bitmask_key) ||
+                                       test_bit(BTN_1, bitmask_key) ||
+                                       test_bit(ABS_RX, bitmask_abs) ||
+                                       test_bit(ABS_RY, bitmask_abs) ||
+                                       test_bit(ABS_RZ, bitmask_abs) ||
+                                       test_bit(ABS_THROTTLE, bitmask_abs) ||
+                                       test_bit(ABS_RUDDER, bitmask_abs) ||
+                                       test_bit(ABS_WHEEL, bitmask_abs) ||
+                                       test_bit(ABS_GAS, bitmask_abs) ||
+                                       test_bit(ABS_BRAKE, bitmask_abs);
+
+        if (has_abs_coordinates) {
+                if (stylus_or_pen)
+                        is_tablet = true;
+                else if (finger_but_no_pen && !is_direct)
+                        is_touchpad = true;
+                else if (has_mouse_button)
+                        /* This path is taken by VMware's USB mouse, which has
+                         * absolute axes, but no touch/pressure button. */
+                        is_mouse = true;
+                else if (has_touch || is_direct)
+                        is_touchscreen = true;
+                else if (has_joystick_axes_or_buttons)
+                        is_joystick = true;
+        }
+        if (has_mt_coordinates && (is_direct || has_touch))
+                is_touchscreen = true;
+
+        if (has_rel_coordinates && has_mouse_button)
+                is_mouse = true;
+
+        if (is_pointing_stick)
+                udev_builtin_add_property(dev, test, "ID_INPUT_POINTINGSTICK", "1");
+        if (is_mouse)
+                udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
+        if (is_touchpad)
+                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
+        if (is_touchscreen)
+                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
+        if (is_joystick)
+                udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
+        if (is_tablet)
+                udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");
+
+        return is_tablet || is_mouse || is_touchpad || is_touchscreen || is_joystick || is_pointing_stick;
+}
+
+/* key like devices */
+static bool test_key(struct udev_device *dev,
+                     const unsigned long* bitmask_ev,
+                     const unsigned long* bitmask_key,
+                     bool test) {
+        unsigned i;
+        unsigned long found;
+        unsigned long mask;
+        bool ret = false;
+
+        /* do we have any KEY_* capability? */
+        if (!test_bit(EV_KEY, bitmask_ev)) {
+                log_debug("test_key: no EV_KEY capability");
+                return false;
+        }
+
+        /* only consider KEY_* here, not BTN_* */
+        found = 0;
+        for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
+                found |= bitmask_key[i];
+                log_debug("test_key: checking bit block %lu for any keys; found=%i", (unsigned long)i*BITS_PER_LONG, found > 0);
+        }
+        /* If there are no keys in the lower block, check the higher block */
+        if (!found) {
+                for (i = KEY_OK; i < BTN_TRIGGER_HAPPY; ++i) {
+                        if (test_bit(i, bitmask_key)) {
+                                log_debug("test_key: Found key %x in high block", i);
+                                found = 1;
+                                break;
+                        }
+                }
+        }
+
+        if (found > 0) {
+                udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
+                ret = true;
+        }
+
+        /* the first 32 bits are ESC, numbers, and Q to D; if we have all of
+         * those, consider it a full keyboard; do not test KEY_RESERVED, though */
+        mask = 0xFFFFFFFE;
+        if ((bitmask_key[0] & mask) == mask) {
+                udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
+                ret = true;
+        }
+
+        return ret;
+}
+
+static int builtin_input_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+        struct udev_device *pdev;
+        unsigned long bitmask_ev[NBITS(EV_MAX)];
+        unsigned long bitmask_abs[NBITS(ABS_MAX)];
+        unsigned long bitmask_key[NBITS(KEY_MAX)];
+        unsigned long bitmask_rel[NBITS(REL_MAX)];
+        unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)];
+        const char *sysname, *devnode;
+        bool is_pointer;
+        bool is_key;
+
+        assert(dev);
+
+        /* walk up the parental chain until we find the real input device; the
+         * argument is very likely a subdevice of this, like eventN */
+        pdev = dev;
+        while (pdev != NULL && udev_device_get_sysattr_value(pdev, "capabilities/ev") == NULL)
+                pdev = udev_device_get_parent_with_subsystem_devtype(pdev, "input", NULL);
+
+        if (pdev) {
+                /* Use this as a flag that input devices were detected, so that this
+                 * program doesn't need to be called more than once per device */
+                udev_builtin_add_property(dev, test, "ID_INPUT", "1");
+                get_cap_mask(dev, pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
+                get_cap_mask(dev, pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
+                get_cap_mask(dev, pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
+                get_cap_mask(dev, pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
+                get_cap_mask(dev, pdev, "properties", bitmask_props, sizeof(bitmask_props), test);
+                is_pointer = test_pointers(dev, bitmask_ev, bitmask_abs,
+                                           bitmask_key, bitmask_rel,
+                                           bitmask_props, test);
+                is_key = test_key(dev, bitmask_ev, bitmask_key, test);
+                /* Some evdev nodes have only a scrollwheel */
+                if (!is_pointer && !is_key && test_bit(EV_REL, bitmask_ev) &&
+                    (test_bit(REL_WHEEL, bitmask_rel) || test_bit(REL_HWHEEL, bitmask_rel)))
+                        udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
+        }
+
+        devnode = udev_device_get_devnode(dev);
+        sysname = udev_device_get_sysname(dev);
+        if (devnode && sysname && startswith(sysname, "event"))
+                extract_info(dev, devnode, test);
+
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_input_id = {
+        .name = "input_id",
+        .cmd = builtin_input_id,
+        .help = "Input device properties",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-keyboard.c b/src/grp-udev/libudev-core/udev-builtin-keyboard.c
new file mode 100644
index 0000000000..aa10beafb0
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-keyboard.c
@@ -0,0 +1,277 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <linux/input.h>
+
+#include "fd-util.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+static const struct key *keyboard_lookup_key(const char *str, unsigned len);
+#include "keyboard-keys-from-name.h"
+
+static int install_force_release(struct udev_device *dev, const unsigned *release, unsigned release_count) {
+        struct udev_device *atkbd;
+        const char *cur;
+        char codes[4096];
+        char *s;
+        size_t l;
+        unsigned i;
+        int ret;
+
+        assert(dev);
+        assert(release);
+
+        atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
+        if (!atkbd)
+                return -ENODEV;
+
+        cur = udev_device_get_sysattr_value(atkbd, "force_release");
+        if (!cur)
+                return -ENODEV;
+
+        s = codes;
+        l = sizeof(codes);
+
+        /* copy current content */
+        l = strpcpy(&s, l, cur);
+
+        /* append new codes */
+        for (i = 0; i < release_count; i++)
+                l = strpcpyf(&s, l, ",%u", release[i]);
+
+        log_debug("keyboard: updating force-release list with '%s'", codes);
+        ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
+        if (ret < 0)
+                log_error_errno(ret, "Error writing force-release attribute: %m");
+        return ret;
+}
+
+static void map_keycode(int fd, const char *devnode, int scancode, const char *keycode)
+{
+        struct {
+                unsigned scan;
+                unsigned key;
+        } map;
+        char *endptr;
+        const struct key *k;
+        unsigned keycode_num;
+
+        /* translate identifier to key code */
+        k = keyboard_lookup_key(keycode, strlen(keycode));
+        if (k) {
+                keycode_num = k->id;
+        } else {
+                /* check if it's a numeric code already */
+                keycode_num = strtoul(keycode, &endptr, 0);
+                if (endptr[0] !='\0') {
+                        log_error("Unknown key identifier '%s'", keycode);
+                        return;
+                }
+        }
+
+        map.scan = scancode;
+        map.key = keycode_num;
+
+        log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
+                  map.scan, map.scan, map.key, map.key);
+
+        if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
+                log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key);
+}
+
+static inline char* parse_token(const char *current, int32_t *val_out) {
+        char *next;
+        int32_t val;
+
+        if (!current)
+                return NULL;
+
+        val = strtol(current, &next, 0);
+        if (*next && *next != ':')
+                return NULL;
+
+        if (next != current)
+                *val_out = val;
+
+        if (*next)
+                next++;
+
+        return next;
+}
+
+static void override_abs(int fd, const char *devnode,
+                         unsigned evcode, const char *value) {
+        struct input_absinfo absinfo;
+        int rc;
+        char *next;
+
+        rc = ioctl(fd, EVIOCGABS(evcode), &absinfo);
+        if (rc < 0) {
+                log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode);
+                return;
+        }
+
+        next = parse_token(value, &absinfo.minimum);
+        next = parse_token(next, &absinfo.maximum);
+        next = parse_token(next, &absinfo.resolution);
+        next = parse_token(next, &absinfo.fuzz);
+        next = parse_token(next, &absinfo.flat);
+        if (!next) {
+                log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode);
+                return;
+        }
+
+        log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"",
+                  evcode,
+                  absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat,
+                  devnode);
+        rc = ioctl(fd, EVIOCSABS(evcode), &absinfo);
+        if (rc < 0)
+                log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
+}
+
+static void set_trackpoint_sensitivity(struct udev_device *dev, const char *value)
+{
+        struct udev_device *pdev;
+        char val_s[DECIMAL_STR_MAX(int)];
+        int r, val_i;
+
+        assert(dev);
+        assert(value);
+
+        /* The sensitivity sysfs attr belongs to the serio parent device */
+        pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
+        if (!pdev) {
+                log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
+                return;
+        }
+
+        r = safe_atoi(value, &val_i);
+        if (r < 0) {
+                log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
+                return;
+        }
+
+        xsprintf(val_s, "%d", val_i);
+
+        r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
+        if (r < 0)
+                log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
+}
+
+static int open_device(const char *devnode) {
+        int fd;
+
+        fd = open(devnode, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
+        if (fd < 0)
+                return log_error_errno(errno, "Error opening device \"%s\": %m", devnode);
+
+        return fd;
+}
+
+static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
+        struct udev_list_entry *entry;
+        unsigned release[1024];
+        unsigned release_count = 0;
+        _cleanup_close_ int fd = -1;
+        const char *node;
+
+        node = udev_device_get_devnode(dev);
+        if (!node) {
+                log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
+                return EXIT_FAILURE;
+        }
+
+        udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
+                const char *key;
+                char *endptr;
+
+                key = udev_list_entry_get_name(entry);
+                if (startswith(key, "KEYBOARD_KEY_")) {
+                        const char *keycode;
+                        unsigned scancode;
+
+                        /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
+                        scancode = strtoul(key + 13, &endptr, 16);
+                        if (endptr[0] != '\0') {
+                                log_warning("Unable to parse scan code from \"%s\"", key);
+                                continue;
+                        }
+
+                        keycode = udev_list_entry_get_value(entry);
+
+                        /* a leading '!' needs a force-release entry */
+                        if (keycode[0] == '!') {
+                                keycode++;
+
+                                release[release_count] = scancode;
+                                if (release_count <  ELEMENTSOF(release)-1)
+                                        release_count++;
+
+                                if (keycode[0] == '\0')
+                                        continue;
+                        }
+
+                        if (fd == -1) {
+                                fd = open_device(node);
+                                if (fd < 0)
+                                        return EXIT_FAILURE;
+                        }
+
+                        map_keycode(fd, node, scancode, keycode);
+                } else if (startswith(key, "EVDEV_ABS_")) {
+                        unsigned evcode;
+
+                        /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
+                        evcode = strtoul(key + 10, &endptr, 16);
+                        if (endptr[0] != '\0') {
+                                log_warning("Unable to parse EV_ABS code from \"%s\"", key);
+                                continue;
+                        }
+
+                        if (fd == -1) {
+                                fd = open_device(node);
+                                if (fd < 0)
+                                        return EXIT_FAILURE;
+                        }
+
+                        override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
+                } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
+                        set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
+        }
+
+        /* install list of force-release codes */
+        if (release_count > 0)
+                install_force_release(dev, release, release_count);
+
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_keyboard = {
+        .name = "keyboard",
+        .cmd = builtin_keyboard,
+        .help = "Keyboard scan code to key mapping",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-kmod.c b/src/grp-udev/libudev-core/udev-builtin-kmod.c
new file mode 100644
index 0000000000..9665f678fd
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-kmod.c
@@ -0,0 +1,123 @@
+/*
+ * load kernel modules
+ *
+ * Copyright (C) 2011-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2011 ProFUSION embedded systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <libkmod.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "string-util.h"
+#include "udev.h"
+
+static struct kmod_ctx *ctx = NULL;
+
+static int load_module(struct udev *udev, const char *alias) {
+        struct kmod_list *list = NULL;
+        struct kmod_list *l;
+        int err;
+
+        err = kmod_module_new_from_lookup(ctx, alias, &list);
+        if (err < 0)
+                return err;
+
+        if (list == NULL)
+                log_debug("No module matches '%s'", alias);
+
+        kmod_list_foreach(l, list) {
+                struct kmod_module *mod = kmod_module_get_module(l);
+
+                err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
+                if (err == KMOD_PROBE_APPLY_BLACKLIST)
+                        log_debug("Module '%s' is blacklisted", kmod_module_get_name(mod));
+                else if (err == 0)
+                        log_debug("Inserted '%s'", kmod_module_get_name(mod));
+                else
+                        log_debug("Failed to insert '%s'", kmod_module_get_name(mod));
+
+                kmod_module_unref(mod);
+        }
+
+        kmod_module_unref_list(list);
+        return err;
+}
+
+_printf_(6,0) static void udev_kmod_log(void *data, int priority, const char *file, int line, const char *fn, const char *format, va_list args) {
+        log_internalv(priority, 0, file, line, fn, format, args);
+}
+
+static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool test) {
+        struct udev *udev = udev_device_get_udev(dev);
+        int i;
+
+        if (!ctx)
+                return 0;
+
+        if (argc < 3 || !streq(argv[1], "load")) {
+                log_error("expect: %s load <module>", argv[0]);
+                return EXIT_FAILURE;
+        }
+
+        for (i = 2; argv[i]; i++) {
+                log_debug("Execute '%s' '%s'", argv[1], argv[i]);
+                load_module(udev, argv[i]);
+        }
+
+        return EXIT_SUCCESS;
+}
+
+/* called at udev startup and reload */
+static int builtin_kmod_init(struct udev *udev) {
+        if (ctx)
+                return 0;
+
+        ctx = kmod_new(NULL, NULL);
+        if (!ctx)
+                return -ENOMEM;
+
+        log_debug("Load module index");
+        kmod_set_log_fn(ctx, udev_kmod_log, udev);
+        kmod_load_resources(ctx);
+        return 0;
+}
+
+/* called on udev shutdown and reload request */
+static void builtin_kmod_exit(struct udev *udev) {
+        log_debug("Unload module index");
+        ctx = kmod_unref(ctx);
+}
+
+/* called every couple of seconds during event activity; 'true' if config has changed */
+static bool builtin_kmod_validate(struct udev *udev) {
+        log_debug("Validate module index");
+        if (!ctx)
+                return false;
+        return (kmod_validate_resources(ctx) != KMOD_RESOURCES_OK);
+}
+
+const struct udev_builtin udev_builtin_kmod = {
+        .name = "kmod",
+        .cmd = builtin_kmod,
+        .init = builtin_kmod_init,
+        .exit = builtin_kmod_exit,
+        .validate = builtin_kmod_validate,
+        .help = "Kernel module loader",
+        .run_once = false,
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-net_id.c b/src/grp-udev/libudev-core/udev-builtin-net_id.c
new file mode 100644
index 0000000000..a7be2a4eed
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-net_id.c
@@ -0,0 +1,623 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+/*
+ * Predictable network interface device names based on:
+ *  - firmware/bios-provided index numbers for on-board devices
+ *  - firmware-provided pci-express hotplug slot index number
+ *  - physical/geographical location of the hardware
+ *  - the interface's MAC address
+ *
+ * http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames
+ *
+ * Two character prefixes based on the type of interface:
+ *   en — Ethernet
+ *   sl — serial line IP (slip)
+ *   wl — wlan
+ *   ww — wwan
+ *
+ * Type of names:
+ *   b<number>                             — BCMA bus core number
+ *   c<bus_id>                             — CCW bus group name, without leading zeros [s390]
+ *   o<index>[d<dev_port>]                 — on-board device index number
+ *   s<slot>[f<function>][d<dev_port>]     — hotplug slot index number
+ *   x<MAC>                                — MAC address
+ *   [P<domain>]p<bus>s<slot>[f<function>][d<dev_port>]
+ *                                         — PCI geographical location
+ *   [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
+ *                                         — USB port number chain
+ *
+ * All multi-function PCI devices will carry the [f<function>] number in the
+ * device name, including the function 0 device.
+ *
+ * When using PCI geography, The PCI domain is only prepended when it is not 0.
+ *
+ * For USB devices the full chain of port numbers of hubs is composed. If the
+ * name gets longer than the maximum number of 15 characters, the name is not
+ * exported.
+ * The usual USB configuration == 1 and interface == 0 values are suppressed.
+ *
+ * PCI Ethernet card with firmware index "1":
+ *   ID_NET_NAME_ONBOARD=eno1
+ *   ID_NET_NAME_ONBOARD_LABEL=Ethernet Port 1
+ *
+ * PCI Ethernet card in hotplug slot with firmware index number:
+ *   /sys/devices/pci0000:00/0000:00:1c.3/0000:05:00.0/net/ens1
+ *   ID_NET_NAME_MAC=enx000000000466
+ *   ID_NET_NAME_PATH=enp5s0
+ *   ID_NET_NAME_SLOT=ens1
+ *
+ * PCI Ethernet multi-function card with 2 ports:
+ *   /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/net/enp2s0f0
+ *   ID_NET_NAME_MAC=enx78e7d1ea46da
+ *   ID_NET_NAME_PATH=enp2s0f0
+ *   /sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.1/net/enp2s0f1
+ *   ID_NET_NAME_MAC=enx78e7d1ea46dc
+ *   ID_NET_NAME_PATH=enp2s0f1
+ *
+ * PCI wlan card:
+ *   /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlp3s0
+ *   ID_NET_NAME_MAC=wlx0024d7e31130
+ *   ID_NET_NAME_PATH=wlp3s0
+ *
+ * USB built-in 3G modem:
+ *   /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.6/net/wwp0s29u1u4i6
+ *   ID_NET_NAME_MAC=wwx028037ec0200
+ *   ID_NET_NAME_PATH=wwp0s29u1u4i6
+ *
+ * USB Android phone:
+ *   /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/net/enp0s29u1u2
+ *   ID_NET_NAME_MAC=enxd626b3450fb5
+ *   ID_NET_NAME_PATH=enp0s29u1u2
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <linux/pci_regs.h>
+
+#include "fd-util.h"
+#include "fileio.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+#define ONBOARD_INDEX_MAX (16*1024-1)
+
+enum netname_type{
+        NET_UNDEF,
+        NET_PCI,
+        NET_USB,
+        NET_BCMA,
+        NET_VIRTIO,
+        NET_CCWGROUP,
+};
+
+struct netnames {
+        enum netname_type type;
+
+        uint8_t mac[6];
+        bool mac_valid;
+
+        struct udev_device *pcidev;
+        char pci_slot[IFNAMSIZ];
+        char pci_path[IFNAMSIZ];
+        char pci_onboard[IFNAMSIZ];
+        const char *pci_onboard_label;
+
+        char usb_ports[IFNAMSIZ];
+        char bcma_core[IFNAMSIZ];
+        char ccw_group[IFNAMSIZ];
+};
+
+/* retrieve on-board index number and label from firmware */
+static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
+        unsigned dev_port = 0;
+        size_t l;
+        char *s;
+        const char *attr;
+        int idx;
+
+        /* ACPI _DSM  — device specific method for naming a PCI or PCI Express device */
+        attr = udev_device_get_sysattr_value(names->pcidev, "acpi_index");
+        /* SMBIOS type 41 — Onboard Devices Extended Information */
+        if (!attr)
+                attr = udev_device_get_sysattr_value(names->pcidev, "index");
+        if (!attr)
+                return -ENOENT;
+
+        idx = strtoul(attr, NULL, 0);
+        if (idx <= 0)
+                return -EINVAL;
+
+        /* Some BIOSes report rubbish indexes that are excessively high (2^24-1 is an index VMware likes to report for
+         * example). Let's define a cut-off where we don't consider the index reliable anymore. We pick some arbitrary
+         * cut-off, which is somewhere beyond the realistic number of physical network interface a system might
+         * have. Ideally the kernel would already filter his crap for us, but it doesn't currently. */
+        if (idx > ONBOARD_INDEX_MAX)
+                return -ENOENT;
+
+        /* kernel provided port index for multiple ports on a single PCI function */
+        attr = udev_device_get_sysattr_value(dev, "dev_port");
+        if (attr)
+                dev_port = strtol(attr, NULL, 10);
+
+        s = names->pci_onboard;
+        l = sizeof(names->pci_onboard);
+        l = strpcpyf(&s, l, "o%d", idx);
+        if (dev_port > 0)
+                l = strpcpyf(&s, l, "d%d", dev_port);
+        if (l == 0)
+                names->pci_onboard[0] = '\0';
+
+        names->pci_onboard_label = udev_device_get_sysattr_value(names->pcidev, "label");
+
+        return 0;
+}
+
+/* read the 256 bytes PCI configuration space to check the multi-function bit */
+static bool is_pci_multifunction(struct udev_device *dev) {
+        _cleanup_close_ int fd = -1;
+        const char *filename;
+        uint8_t config[64];
+
+        filename = strjoina(udev_device_get_syspath(dev), "/config");
+        fd = open(filename, O_RDONLY | O_CLOEXEC);
+        if (fd < 0)
+                return false;
+        if (read(fd, &config, sizeof(config)) != sizeof(config))
+                return false;
+
+        /* bit 0-6 header type, bit 7 multi/single function device */
+        if ((config[PCI_HEADER_TYPE] & 0x80) != 0)
+                return true;
+
+        return false;
+}
+
+static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
+        struct udev *udev = udev_device_get_udev(names->pcidev);
+        unsigned domain, bus, slot, func, dev_port = 0;
+        size_t l;
+        char *s;
+        const char *attr;
+        struct udev_device *pci = NULL;
+        char slots[256], str[256];
+        _cleanup_closedir_ DIR *dir = NULL;
+        struct dirent *dent;
+        int hotplug_slot = 0, err = 0;
+
+        if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4)
+                return -ENOENT;
+
+        /* kernel provided port index for multiple ports on a single PCI function */
+        attr = udev_device_get_sysattr_value(dev, "dev_port");
+        if (attr)
+                dev_port = strtol(attr, NULL, 10);
+
+        /* compose a name based on the raw kernel's PCI bus, slot numbers */
+        s = names->pci_path;
+        l = sizeof(names->pci_path);
+        if (domain > 0)
+                l = strpcpyf(&s, l, "P%u", domain);
+        l = strpcpyf(&s, l, "p%us%u", bus, slot);
+        if (func > 0 || is_pci_multifunction(names->pcidev))
+                l = strpcpyf(&s, l, "f%u", func);
+        if (dev_port > 0)
+                l = strpcpyf(&s, l, "d%u", dev_port);
+        if (l == 0)
+                names->pci_path[0] = '\0';
+
+        /* ACPI _SUN  — slot user number */
+        pci = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
+        if (!pci) {
+                err = -ENOENT;
+                goto out;
+        }
+        xsprintf(slots, "%s/slots", udev_device_get_syspath(pci));
+        dir = opendir(slots);
+        if (!dir) {
+                err = -errno;
+                goto out;
+        }
+
+        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+                int i;
+                char *rest;
+                char *address;
+
+                if (dent->d_name[0] == '.')
+                        continue;
+                i = strtol(dent->d_name, &rest, 10);
+                if (rest[0] != '\0')
+                        continue;
+                if (i < 1)
+                        continue;
+                xsprintf(str, "%s/%s/address", slots, dent->d_name);
+                if (read_one_line_file(str, &address) >= 0) {
+                        /* match slot address with device by stripping the function */
+                        if (strneq(address, udev_device_get_sysname(names->pcidev), strlen(address)))
+                                hotplug_slot = i;
+                        free(address);
+                }
+
+                if (hotplug_slot > 0)
+                        break;
+        }
+
+        if (hotplug_slot > 0) {
+                s = names->pci_slot;
+                l = sizeof(names->pci_slot);
+                if (domain > 0)
+                        l = strpcpyf(&s, l, "P%d", domain);
+                l = strpcpyf(&s, l, "s%d", hotplug_slot);
+                if (func > 0 || is_pci_multifunction(names->pcidev))
+                        l = strpcpyf(&s, l, "f%d", func);
+                if (dev_port > 0)
+                        l = strpcpyf(&s, l, "d%d", dev_port);
+                if (l == 0)
+                        names->pci_slot[0] = '\0';
+        }
+out:
+        udev_device_unref(pci);
+        return err;
+}
+
+static int names_pci(struct udev_device *dev, struct netnames *names) {
+        struct udev_device *parent;
+
+        assert(dev);
+        assert(names);
+
+        parent = udev_device_get_parent(dev);
+
+        /* there can only ever be one virtio bus per parent device, so we can
+           safely ignore any virtio buses. see
+           <http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html> */
+        while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent)))
+                parent = udev_device_get_parent(parent);
+
+        if (!parent)
+                return -ENOENT;
+
+        /* check if our direct parent is a PCI device with no other bus in-between */
+        if (streq_ptr("pci", udev_device_get_subsystem(parent))) {
+                names->type = NET_PCI;
+                names->pcidev = parent;
+        } else {
+                names->pcidev = udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
+                if (!names->pcidev)
+                        return -ENOENT;
+        }
+        dev_pci_onboard(dev, names);
+        dev_pci_slot(dev, names);
+        return 0;
+}
+
+static int names_usb(struct udev_device *dev, struct netnames *names) {
+        struct udev_device *usbdev;
+        char name[256];
+        char *ports;
+        char *config;
+        char *interf;
+        size_t l;
+        char *s;
+
+        assert(dev);
+        assert(names);
+
+        usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
+        if (!usbdev)
+                return -ENOENT;
+
+        /* get USB port number chain, configuration, interface */
+        strscpy(name, sizeof(name), udev_device_get_sysname(usbdev));
+        s = strchr(name, '-');
+        if (!s)
+                return -EINVAL;
+        ports = s+1;
+
+        s = strchr(ports, ':');
+        if (!s)
+                return -EINVAL;
+        s[0] = '\0';
+        config = s+1;
+
+        s = strchr(config, '.');
+        if (!s)
+                return -EINVAL;
+        s[0] = '\0';
+        interf = s+1;
+
+        /* prefix every port number in the chain with "u" */
+        s = ports;
+        while ((s = strchr(s, '.')))
+                s[0] = 'u';
+        s = names->usb_ports;
+        l = strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL);
+
+        /* append USB config number, suppress the common config == 1 */
+        if (!streq(config, "1"))
+                l = strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL);
+
+        /* append USB interface number, suppress the interface == 0 */
+        if (!streq(interf, "0"))
+                l = strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL);
+        if (l == 0)
+                return -ENAMETOOLONG;
+
+        names->type = NET_USB;
+        return 0;
+}
+
+static int names_bcma(struct udev_device *dev, struct netnames *names) {
+        struct udev_device *bcmadev;
+        unsigned int core;
+
+        assert(dev);
+        assert(names);
+
+        bcmadev = udev_device_get_parent_with_subsystem_devtype(dev, "bcma", NULL);
+        if (!bcmadev)
+                return -ENOENT;
+
+        /* bus num:core num */
+        if (sscanf(udev_device_get_sysname(bcmadev), "bcma%*u:%u", &core) != 1)
+                return -EINVAL;
+        /* suppress the common core == 0 */
+        if (core > 0)
+                xsprintf(names->bcma_core, "b%u", core);
+
+        names->type = NET_BCMA;
+        return 0;
+}
+
+static int names_ccw(struct  udev_device *dev, struct netnames *names) {
+        struct udev_device *cdev;
+        const char *bus_id;
+        size_t bus_id_len;
+        int rc;
+
+        assert(dev);
+        assert(names);
+
+        /* Retrieve the associated CCW device */
+        cdev = udev_device_get_parent(dev);
+        if (!cdev)
+                return -ENOENT;
+
+        /* Network devices are always grouped CCW devices */
+        if (!streq_ptr("ccwgroup", udev_device_get_subsystem(cdev)))
+                return -ENOENT;
+
+        /* Retrieve bus-ID of the grouped CCW device.  The bus-ID uniquely
+         * identifies the network device on the Linux on System z channel
+         * subsystem.  Note that the bus-ID contains lowercase characters.
+         */
+        bus_id = udev_device_get_sysname(cdev);
+        if (!bus_id)
+                return -ENOENT;
+
+        /* Check the length of the bus-ID.  Rely on that the kernel provides
+         * a correct bus-ID; alternatively, improve this check and parse and
+         * verify each bus-ID part...
+         */
+        bus_id_len = strlen(bus_id);
+        if (!bus_id_len || bus_id_len < 8 || bus_id_len > 9)
+                return -EINVAL;
+
+        /* Strip leading zeros from the bus id for aesthetic purposes. This
+         * keeps the ccw names stable, yet much shorter in general case of
+         * bus_id 0.0.0600 -> 600. This is similar to e.g. how PCI domain is
+         * not prepended when it is zero.
+         */
+        bus_id += strspn(bus_id, ".0");
+
+        /* Store the CCW bus-ID for use as network device name */
+        rc = snprintf(names->ccw_group, sizeof(names->ccw_group), "c%s", bus_id);
+        if (rc >= 0 && rc < (int)sizeof(names->ccw_group))
+                names->type = NET_CCWGROUP;
+        return 0;
+}
+
+static int names_mac(struct udev_device *dev, struct netnames *names) {
+        const char *s;
+        unsigned int i;
+        unsigned int a1, a2, a3, a4, a5, a6;
+
+        /* check for NET_ADDR_PERM, skip random MAC addresses */
+        s = udev_device_get_sysattr_value(dev, "addr_assign_type");
+        if (!s)
+                return EXIT_FAILURE;
+        i = strtoul(s, NULL, 0);
+        if (i != 0)
+                return 0;
+
+        s = udev_device_get_sysattr_value(dev, "address");
+        if (!s)
+                return -ENOENT;
+        if (sscanf(s, "%x:%x:%x:%x:%x:%x", &a1, &a2, &a3, &a4, &a5, &a6) != 6)
+                return -EINVAL;
+
+        /* skip empty MAC addresses */
+        if (a1 + a2 + a3 + a4 + a5 + a6 == 0)
+                return -EINVAL;
+
+        names->mac[0] = a1;
+        names->mac[1] = a2;
+        names->mac[2] = a3;
+        names->mac[3] = a4;
+        names->mac[4] = a5;
+        names->mac[5] = a6;
+        names->mac_valid = true;
+        return 0;
+}
+
+/* IEEE Organizationally Unique Identifier vendor string */
+static int ieee_oui(struct udev_device *dev, struct netnames *names, bool test) {
+        char str[32];
+
+        if (!names->mac_valid)
+                return -ENOENT;
+        /* skip commonly misused 00:00:00 (Xerox) prefix */
+        if (memcmp(names->mac, "\0\0\0", 3) == 0)
+                return -EINVAL;
+        xsprintf(str, "OUI:%02X%02X%02X%02X%02X%02X", names->mac[0],
+                 names->mac[1], names->mac[2], names->mac[3], names->mac[4],
+                 names->mac[5]);
+        udev_builtin_hwdb_lookup(dev, NULL, str, NULL, test);
+        return 0;
+}
+
+static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+        const char *s;
+        const char *p;
+        unsigned int i;
+        const char *devtype;
+        const char *prefix = "en";
+        struct netnames names = {};
+        int err;
+
+        /* handle only ARPHRD_ETHER and ARPHRD_SLIP devices */
+        s = udev_device_get_sysattr_value(dev, "type");
+        if (!s)
+                return EXIT_FAILURE;
+        i = strtoul(s, NULL, 0);
+        switch (i) {
+        case ARPHRD_ETHER:
+                prefix = "en";
+                break;
+        case ARPHRD_SLIP:
+                prefix = "sl";
+                break;
+        default:
+                return 0;
+        }
+
+        /* skip stacked devices, like VLANs, ... */
+        s = udev_device_get_sysattr_value(dev, "ifindex");
+        if (!s)
+                return EXIT_FAILURE;
+        p = udev_device_get_sysattr_value(dev, "iflink");
+        if (!p)
+                return EXIT_FAILURE;
+        if (!streq(s, p))
+                return 0;
+
+        devtype = udev_device_get_devtype(dev);
+        if (devtype) {
+                if (streq("wlan", devtype))
+                        prefix = "wl";
+                else if (streq("wwan", devtype))
+                        prefix = "ww";
+        }
+
+        err = names_mac(dev, &names);
+        if (err >= 0 && names.mac_valid) {
+                char str[IFNAMSIZ];
+
+                xsprintf(str, "%sx%02x%02x%02x%02x%02x%02x", prefix,
+                         names.mac[0], names.mac[1], names.mac[2],
+                         names.mac[3], names.mac[4], names.mac[5]);
+                udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str);
+
+                ieee_oui(dev, &names, test);
+        }
+
+        /* get path names for Linux on System z network devices */
+        err = names_ccw(dev, &names);
+        if (err >= 0 && names.type == NET_CCWGROUP) {
+                char str[IFNAMSIZ];
+
+                if (snprintf(str, sizeof(str), "%s%s", prefix, names.ccw_group) < (int)sizeof(str))
+                        udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+                goto out;
+        }
+
+        /* get PCI based path names, we compose only PCI based paths */
+        err = names_pci(dev, &names);
+        if (err < 0)
+                goto out;
+
+        /* plain PCI device */
+        if (names.type == NET_PCI) {
+                char str[IFNAMSIZ];
+
+                if (names.pci_onboard[0])
+                        if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str);
+
+                if (names.pci_onboard_label)
+                        if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard_label) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str);
+
+                if (names.pci_path[0])
+                        if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_path) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+
+                if (names.pci_slot[0])
+                        if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_slot) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+                goto out;
+        }
+
+        /* USB device */
+        err = names_usb(dev, &names);
+        if (err >= 0 && names.type == NET_USB) {
+                char str[IFNAMSIZ];
+
+                if (names.pci_path[0])
+                        if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.usb_ports) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+
+                if (names.pci_slot[0])
+                        if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.usb_ports) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+                goto out;
+        }
+
+        /* Broadcom bus */
+        err = names_bcma(dev, &names);
+        if (err >= 0 && names.type == NET_BCMA) {
+                char str[IFNAMSIZ];
+
+                if (names.pci_path[0])
+                        if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.bcma_core) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+
+                if (names.pci_slot[0])
+                        if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.bcma_core) < (int)sizeof(str))
+                                udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+                goto out;
+        }
+out:
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_net_id = {
+        .name = "net_id",
+        .cmd = builtin_net_id,
+        .help = "Network device properties",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-net_setup_link.c b/src/grp-udev/libudev-core/udev-builtin-net_setup_link.c
new file mode 100644
index 0000000000..8e47775135
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-net_setup_link.c
@@ -0,0 +1,107 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Tom Gundersen
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "link-config.h"
+#include "log.h"
+#include "udev.h"
+
+static link_config_ctx *ctx = NULL;
+
+static int builtin_net_setup_link(struct udev_device *dev, int argc, char **argv, bool test) {
+        _cleanup_free_ char *driver = NULL;
+        const char *name = NULL;
+        link_config *link;
+        int r;
+
+        if (argc > 1) {
+                log_error("This program takes no arguments.");
+                return EXIT_FAILURE;
+        }
+
+        r = link_get_driver(ctx, dev, &driver);
+        if (r >= 0)
+                udev_builtin_add_property(dev, test, "ID_NET_DRIVER", driver);
+
+        r = link_config_get(ctx, dev, &link);
+        if (r < 0) {
+                if (r == -ENOENT) {
+                        log_debug("No matching link configuration found.");
+                        return EXIT_SUCCESS;
+                } else {
+                        log_error_errno(r, "Could not get link config: %m");
+                        return EXIT_FAILURE;
+                }
+        }
+
+        r = link_config_apply(ctx, link, dev, &name);
+        if (r < 0) {
+                log_error_errno(r, "Could not apply link config to %s: %m", udev_device_get_sysname(dev));
+                return EXIT_FAILURE;
+        }
+
+        udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->filename);
+
+        if (name)
+                udev_builtin_add_property(dev, test, "ID_NET_NAME", name);
+
+        return EXIT_SUCCESS;
+}
+
+static int builtin_net_setup_link_init(struct udev *udev) {
+        int r;
+
+        if (ctx)
+                return 0;
+
+        r = link_config_ctx_new(&ctx);
+        if (r < 0)
+                return r;
+
+        r = link_config_load(ctx);
+        if (r < 0)
+                return r;
+
+        log_debug("Created link configuration context.");
+        return 0;
+}
+
+static void builtin_net_setup_link_exit(struct udev *udev) {
+        link_config_ctx_free(ctx);
+        ctx = NULL;
+        log_debug("Unloaded link configuration context.");
+}
+
+static bool builtin_net_setup_link_validate(struct udev *udev) {
+        log_debug("Check if link configuration needs reloading.");
+        if (!ctx)
+                return false;
+
+        return link_config_should_reload(ctx);
+}
+
+const struct udev_builtin udev_builtin_net_setup_link = {
+        .name = "net_setup_link",
+        .cmd = builtin_net_setup_link,
+        .init = builtin_net_setup_link_init,
+        .exit = builtin_net_setup_link_exit,
+        .validate = builtin_net_setup_link_validate,
+        .help = "Configure network link",
+        .run_once = false,
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-path_id.c b/src/grp-udev/libudev-core/udev-builtin-path_id.c
new file mode 100644
index 0000000000..6e9adc6e96
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-path_id.c
@@ -0,0 +1,761 @@
+/*
+ * compose persistent device path
+ *
+ * Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org>
+ *
+ * Logic based on Hannes Reinecke's shell script.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+_printf_(2,3)
+static int path_prepend(char **path, const char *fmt, ...) {
+        va_list va;
+        char *pre;
+        int err = 0;
+
+        va_start(va, fmt);
+        err = vasprintf(&pre, fmt, va);
+        va_end(va);
+        if (err < 0)
+                goto out;
+
+        if (*path != NULL) {
+                char *new;
+
+                err = asprintf(&new, "%s-%s", pre, *path);
+                free(pre);
+                if (err < 0)
+                        goto out;
+                free(*path);
+                *path = new;
+        } else {
+                *path = pre;
+        }
+out:
+        return err;
+}
+
+/*
+** Linux only supports 32 bit luns.
+** See drivers/scsi/scsi_scan.c::scsilun_to_int() for more details.
+*/
+static int format_lun_number(struct udev_device *dev, char **path) {
+        unsigned long lun = strtoul(udev_device_get_sysnum(dev), NULL, 10);
+
+        /* address method 0, peripheral device addressing with bus id of zero */
+        if (lun < 256)
+                return path_prepend(path, "lun-%lu", lun);
+        /* handle all other lun addressing methods by using a variant of the original lun format */
+        return path_prepend(path, "lun-0x%04lx%04lx00000000", lun & 0xffff, (lun >> 16) & 0xffff);
+}
+
+static struct udev_device *skip_subsystem(struct udev_device *dev, const char *subsys) {
+        struct udev_device *parent = dev;
+
+        assert(dev);
+        assert(subsys);
+
+        while (parent != NULL) {
+                const char *subsystem;
+
+                subsystem = udev_device_get_subsystem(parent);
+                if (subsystem == NULL || !streq(subsystem, subsys))
+                        break;
+                dev = parent;
+                parent = udev_device_get_parent(parent);
+        }
+        return dev;
+}
+
+static struct udev_device *handle_scsi_fibre_channel(struct udev_device *parent, char **path) {
+        struct udev *udev  = udev_device_get_udev(parent);
+        struct udev_device *targetdev;
+        struct udev_device *fcdev = NULL;
+        const char *port;
+        char *lun = NULL;
+
+        assert(parent);
+        assert(path);
+
+        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
+        if (targetdev == NULL)
+                return NULL;
+
+        fcdev = udev_device_new_from_subsystem_sysname(udev, "fc_transport", udev_device_get_sysname(targetdev));
+        if (fcdev == NULL)
+                return NULL;
+        port = udev_device_get_sysattr_value(fcdev, "port_name");
+        if (port == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        format_lun_number(parent, &lun);
+        path_prepend(path, "fc-%s-%s", port, lun);
+        free(lun);
+out:
+        udev_device_unref(fcdev);
+        return parent;
+}
+
+static struct udev_device *handle_scsi_sas_wide_port(struct udev_device *parent, char **path) {
+        struct udev *udev  = udev_device_get_udev(parent);
+        struct udev_device *targetdev;
+        struct udev_device *target_parent;
+        struct udev_device *sasdev;
+        const char *sas_address;
+        char *lun = NULL;
+
+        assert(parent);
+        assert(path);
+
+        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
+        if (targetdev == NULL)
+                return NULL;
+
+        target_parent = udev_device_get_parent(targetdev);
+        if (target_parent == NULL)
+                return NULL;
+
+        sasdev = udev_device_new_from_subsystem_sysname(udev, "sas_device",
+                                udev_device_get_sysname(target_parent));
+        if (sasdev == NULL)
+                return NULL;
+
+        sas_address = udev_device_get_sysattr_value(sasdev, "sas_address");
+        if (sas_address == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        format_lun_number(parent, &lun);
+        path_prepend(path, "sas-%s-%s", sas_address, lun);
+        free(lun);
+out:
+        udev_device_unref(sasdev);
+        return parent;
+}
+
+static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path)
+{
+        struct udev *udev  = udev_device_get_udev(parent);
+        struct udev_device *targetdev;
+        struct udev_device *target_parent;
+        struct udev_device *port;
+        struct udev_device *expander;
+        struct udev_device *target_sasdev = NULL;
+        struct udev_device *expander_sasdev = NULL;
+        struct udev_device *port_sasdev = NULL;
+        const char *sas_address = NULL;
+        const char *phy_id;
+        const char *phy_count;
+        char *lun = NULL;
+
+        assert(parent);
+        assert(path);
+
+        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
+        if (targetdev == NULL)
+                return NULL;
+
+        target_parent = udev_device_get_parent(targetdev);
+        if (target_parent == NULL)
+                return NULL;
+
+        /* Get sas device */
+        target_sasdev = udev_device_new_from_subsystem_sysname(udev,
+                          "sas_device", udev_device_get_sysname(target_parent));
+        if (target_sasdev == NULL)
+                return NULL;
+
+        /* The next parent is sas port */
+        port = udev_device_get_parent(target_parent);
+        if (port == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        /* Get port device */
+        port_sasdev = udev_device_new_from_subsystem_sysname(udev,
+                          "sas_port", udev_device_get_sysname(port));
+
+        phy_count = udev_device_get_sysattr_value(port_sasdev, "num_phys");
+        if (phy_count == NULL) {
+               parent = NULL;
+               goto out;
+        }
+
+        /* Check if we are simple disk */
+        if (strncmp(phy_count, "1", 2) != 0) {
+                 parent = handle_scsi_sas_wide_port(parent, path);
+                 goto out;
+        }
+
+        /* Get connected phy */
+        phy_id = udev_device_get_sysattr_value(target_sasdev, "phy_identifier");
+        if (phy_id == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        /* The port's parent is either hba or expander */
+        expander = udev_device_get_parent(port);
+        if (expander == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        /* Get expander device */
+        expander_sasdev = udev_device_new_from_subsystem_sysname(udev,
+                          "sas_device", udev_device_get_sysname(expander));
+        if (expander_sasdev != NULL) {
+                 /* Get expander's address */
+                 sas_address = udev_device_get_sysattr_value(expander_sasdev,
+                                                    "sas_address");
+                 if (sas_address == NULL) {
+                        parent = NULL;
+                        goto out;
+                 }
+        }
+
+        format_lun_number(parent, &lun);
+        if (sas_address)
+                 path_prepend(path, "sas-exp%s-phy%s-%s", sas_address, phy_id, lun);
+        else
+                 path_prepend(path, "sas-phy%s-%s", phy_id, lun);
+
+        free(lun);
+out:
+        udev_device_unref(target_sasdev);
+        udev_device_unref(expander_sasdev);
+        udev_device_unref(port_sasdev);
+        return parent;
+}
+
+static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path) {
+        struct udev *udev  = udev_device_get_udev(parent);
+        struct udev_device *transportdev;
+        struct udev_device *sessiondev = NULL;
+        const char *target;
+        char *connname;
+        struct udev_device *conndev = NULL;
+        const char *addr;
+        const char *port;
+        char *lun = NULL;
+
+        assert(parent);
+        assert(path);
+
+        /* find iscsi session */
+        transportdev = parent;
+        for (;;) {
+                transportdev = udev_device_get_parent(transportdev);
+                if (transportdev == NULL)
+                        return NULL;
+                if (startswith(udev_device_get_sysname(transportdev), "session"))
+                        break;
+        }
+
+        /* find iscsi session device */
+        sessiondev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session", udev_device_get_sysname(transportdev));
+        if (sessiondev == NULL)
+                return NULL;
+        target = udev_device_get_sysattr_value(sessiondev, "targetname");
+        if (target == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) {
+                parent = NULL;
+                goto out;
+        }
+        conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname);
+        free(connname);
+        if (conndev == NULL) {
+                parent = NULL;
+                goto out;
+        }
+        addr = udev_device_get_sysattr_value(conndev, "persistent_address");
+        port = udev_device_get_sysattr_value(conndev, "persistent_port");
+        if (addr == NULL || port == NULL) {
+                parent = NULL;
+                goto out;
+        }
+
+        format_lun_number(parent, &lun);
+        path_prepend(path, "ip-%s:%s-iscsi-%s-%s", addr, port, target, lun);
+        free(lun);
+out:
+        udev_device_unref(sessiondev);
+        udev_device_unref(conndev);
+        return parent;
+}
+
+static struct udev_device *handle_scsi_ata(struct udev_device *parent, char **path) {
+        struct udev *udev  = udev_device_get_udev(parent);
+        struct udev_device *targetdev;
+        struct udev_device *target_parent;
+        struct udev_device *atadev;
+        const char *port_no;
+
+        assert(parent);
+        assert(path);
+
+        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
+        if (!targetdev)
+                return NULL;
+
+        target_parent = udev_device_get_parent(targetdev);
+        if (!target_parent)
+                return NULL;
+
+        atadev = udev_device_new_from_subsystem_sysname(udev, "ata_port", udev_device_get_sysname(target_parent));
+        if (!atadev)
+                return NULL;
+
+        port_no = udev_device_get_sysattr_value(atadev, "port_no");
+        if (!port_no) {
+               parent = NULL;
+               goto out;
+        }
+        path_prepend(path, "ata-%s", port_no);
+out:
+        udev_device_unref(atadev);
+        return parent;
+}
+
+static struct udev_device *handle_scsi_default(struct udev_device *parent, char **path) {
+        struct udev_device *hostdev;
+        int host, bus, target, lun;
+        const char *name;
+        char *base;
+        char *pos;
+        DIR *dir;
+        struct dirent *dent;
+        int basenum;
+
+        assert(parent);
+        assert(path);
+
+        hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
+        if (hostdev == NULL)
+                return NULL;
+
+        name = udev_device_get_sysname(parent);
+        if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4)
+                return NULL;
+
+        /*
+         * Rebase host offset to get the local relative number
+         *
+         * Note: This is by definition racy, unreliable and too simple.
+         * Please do not copy this model anywhere. It's just a left-over
+         * from the time we had no idea how things should look like in
+         * the end.
+         *
+         * Making assumptions about a global in-kernel counter and use
+         * that to calculate a local offset is a very broken concept. It
+         * can only work as long as things are in strict order.
+         *
+         * The kernel needs to export the instance/port number of a
+         * controller directly, without the need for rebase magic like
+         * this. Manual driver unbind/bind, parallel hotplug/unplug will
+         * get into the way of this "I hope it works" logic.
+         */
+        basenum = -1;
+        base = strdup(udev_device_get_syspath(hostdev));
+        if (base == NULL)
+                return NULL;
+        pos = strrchr(base, '/');
+        if (pos == NULL) {
+                parent = NULL;
+                goto out;
+        }
+        pos[0] = '\0';
+        dir = opendir(base);
+        if (dir == NULL) {
+                parent = NULL;
+                goto out;
+        }
+        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+                char *rest;
+                int i;
+
+                if (dent->d_name[0] == '.')
+                        continue;
+                if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
+                        continue;
+                if (!startswith(dent->d_name, "host"))
+                        continue;
+                i = strtoul(&dent->d_name[4], &rest, 10);
+                if (rest[0] != '\0')
+                        continue;
+                /*
+                 * find the smallest number; the host really needs to export its
+                 * own instance number per parent device; relying on the global host
+                 * enumeration and plainly rebasing the numbers sounds unreliable
+                 */
+                if (basenum == -1 || i < basenum)
+                        basenum = i;
+        }
+        closedir(dir);
+        if (basenum == -1) {
+                parent = NULL;
+                goto out;
+        }
+        host -= basenum;
+
+        path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun);
+out:
+        free(base);
+        return hostdev;
+}
+
+static struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path) {
+        struct udev_device *hostdev;
+        struct udev_device *vmbusdev;
+        const char *guid_str;
+        char *lun = NULL;
+        char guid[38];
+        size_t i, k;
+
+        assert(parent);
+        assert(path);
+
+        hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
+        if (!hostdev)
+                return NULL;
+
+        vmbusdev = udev_device_get_parent(hostdev);
+        if (!vmbusdev)
+                return NULL;
+
+        guid_str = udev_device_get_sysattr_value(vmbusdev, "device_id");
+        if (!guid_str)
+                return NULL;
+
+        if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}')
+                return NULL;
+
+        for (i = 1, k = 0; i < 36; i++) {
+                if (guid_str[i] == '-')
+                        continue;
+                guid[k++] = guid_str[i];
+        }
+        guid[k] = '\0';
+
+        format_lun_number(parent, &lun);
+        path_prepend(path, "vmbus-%s-%s", guid, lun);
+        free(lun);
+        return parent;
+}
+
+static struct udev_device *handle_scsi(struct udev_device *parent, char **path, bool *supported_parent) {
+        const char *devtype;
+        const char *name;
+        const char *id;
+
+        devtype = udev_device_get_devtype(parent);
+        if (devtype == NULL || !streq(devtype, "scsi_device"))
+                return parent;
+
+        /* firewire */
+        id = udev_device_get_sysattr_value(parent, "ieee1394_id");
+        if (id != NULL) {
+                parent = skip_subsystem(parent, "scsi");
+                path_prepend(path, "ieee1394-0x%s", id);
+                *supported_parent = true;
+                goto out;
+        }
+
+        /* scsi sysfs does not have a "subsystem" for the transport */
+        name = udev_device_get_syspath(parent);
+
+        if (strstr(name, "/rport-") != NULL) {
+                parent = handle_scsi_fibre_channel(parent, path);
+                *supported_parent = true;
+                goto out;
+        }
+
+        if (strstr(name, "/end_device-") != NULL) {
+                parent = handle_scsi_sas(parent, path);
+                *supported_parent = true;
+                goto out;
+        }
+
+        if (strstr(name, "/session") != NULL) {
+                parent = handle_scsi_iscsi(parent, path);
+                *supported_parent = true;
+                goto out;
+        }
+
+        if (strstr(name, "/ata") != NULL) {
+                parent = handle_scsi_ata(parent, path);
+                goto out;
+        }
+
+        if (strstr(name, "/vmbus_") != NULL) {
+                parent = handle_scsi_hyperv(parent, path);
+                goto out;
+        }
+
+        parent = handle_scsi_default(parent, path);
+out:
+        return parent;
+}
+
+static struct udev_device *handle_cciss(struct udev_device *parent, char **path) {
+        const char *str;
+        unsigned int controller, disk;
+
+        str = udev_device_get_sysname(parent);
+        if (sscanf(str, "c%ud%u%*s", &controller, &disk) != 2)
+                return NULL;
+
+        path_prepend(path, "cciss-disk%u", disk);
+        parent = skip_subsystem(parent, "cciss");
+        return parent;
+}
+
+static void handle_scsi_tape(struct udev_device *dev, char **path) {
+        const char *name;
+
+        /* must be the last device in the syspath */
+        if (*path != NULL)
+                return;
+
+        name = udev_device_get_sysname(dev);
+        if (startswith(name, "nst") && strchr("lma", name[3]) != NULL)
+                path_prepend(path, "nst%c", name[3]);
+        else if (startswith(name, "st") && strchr("lma", name[2]) != NULL)
+                path_prepend(path, "st%c", name[2]);
+}
+
+static struct udev_device *handle_usb(struct udev_device *parent, char **path) {
+        const char *devtype;
+        const char *str;
+        const char *port;
+
+        devtype = udev_device_get_devtype(parent);
+        if (devtype == NULL)
+                return parent;
+        if (!streq(devtype, "usb_interface") && !streq(devtype, "usb_device"))
+                return parent;
+
+        str = udev_device_get_sysname(parent);
+        port = strchr(str, '-');
+        if (port == NULL)
+                return parent;
+        port++;
+
+        parent = skip_subsystem(parent, "usb");
+        path_prepend(path, "usb-0:%s", port);
+        return parent;
+}
+
+static struct udev_device *handle_bcma(struct udev_device *parent, char **path) {
+        const char *sysname;
+        unsigned int core;
+
+        sysname = udev_device_get_sysname(parent);
+        if (sscanf(sysname, "bcma%*u:%u", &core) != 1)
+                return NULL;
+
+        path_prepend(path, "bcma-%u", core);
+        return parent;
+}
+
+/* Handle devices of AP bus in System z platform. */
+static struct udev_device *handle_ap(struct udev_device *parent, char **path) {
+        const char *type, *func;
+
+        assert(parent);
+        assert(path);
+
+        type = udev_device_get_sysattr_value(parent, "type");
+        func = udev_device_get_sysattr_value(parent, "ap_functions");
+
+        if (type != NULL && func != NULL) {
+                path_prepend(path, "ap-%s-%s", type, func);
+                goto out;
+        }
+        path_prepend(path, "ap-%s", udev_device_get_sysname(parent));
+out:
+        parent = skip_subsystem(parent, "ap");
+        return parent;
+}
+
+static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+        struct udev_device *parent;
+        char *path = NULL;
+        bool supported_transport = false;
+        bool supported_parent = false;
+
+        assert(dev);
+
+        /* walk up the chain of devices and compose path */
+        parent = dev;
+        while (parent != NULL) {
+                const char *subsys;
+
+                subsys = udev_device_get_subsystem(parent);
+                if (subsys == NULL) {
+                        ;
+                } else if (streq(subsys, "scsi_tape")) {
+                        handle_scsi_tape(parent, &path);
+                } else if (streq(subsys, "scsi")) {
+                        parent = handle_scsi(parent, &path, &supported_parent);
+                        supported_transport = true;
+                } else if (streq(subsys, "cciss")) {
+                        parent = handle_cciss(parent, &path);
+                        supported_transport = true;
+                } else if (streq(subsys, "usb")) {
+                        parent = handle_usb(parent, &path);
+                        supported_transport = true;
+                } else if (streq(subsys, "bcma")) {
+                        parent = handle_bcma(parent, &path);
+                        supported_transport = true;
+                } else if (streq(subsys, "serio")) {
+                        path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent));
+                        parent = skip_subsystem(parent, "serio");
+                } else if (streq(subsys, "pci")) {
+                        path_prepend(&path, "pci-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "pci");
+                        supported_parent = true;
+                } else if (streq(subsys, "platform")) {
+                        path_prepend(&path, "platform-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "platform");
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "acpi")) {
+                        path_prepend(&path, "acpi-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "acpi");
+                        supported_parent = true;
+                } else if (streq(subsys, "xen")) {
+                        path_prepend(&path, "xen-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "xen");
+                        supported_parent = true;
+                } else if (streq(subsys, "virtio")) {
+                        while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent)))
+                                parent = udev_device_get_parent(parent);
+                        path_prepend(&path, "virtio-pci-%s", udev_device_get_sysname(parent));
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "scm")) {
+                        path_prepend(&path, "scm-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "scm");
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "ccw")) {
+                        path_prepend(&path, "ccw-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "ccw");
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "ccwgroup")) {
+                        path_prepend(&path, "ccwgroup-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "ccwgroup");
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "ap")) {
+                        parent = handle_ap(parent, &path);
+                        supported_transport = true;
+                        supported_parent = true;
+                } else if (streq(subsys, "iucv")) {
+                        path_prepend(&path, "iucv-%s", udev_device_get_sysname(parent));
+                        parent = skip_subsystem(parent, "iucv");
+                        supported_transport = true;
+                        supported_parent = true;
+                }
+
+                if (parent)
+                        parent = udev_device_get_parent(parent);
+        }
+
+        /*
+         * Do not return devices with an unknown parent device type. They
+         * might produce conflicting IDs if the parent does not provide a
+         * unique and predictable name.
+         */
+        if (!supported_parent)
+                path = mfree(path);
+
+        /*
+         * Do not return block devices without a well-known transport. Some
+         * devices do not expose their buses and do not provide a unique
+         * and predictable name that way.
+         */
+        if (streq_ptr(udev_device_get_subsystem(dev), "block") && !supported_transport)
+                path = mfree(path);
+
+        if (path != NULL) {
+                char tag[UTIL_NAME_SIZE];
+                size_t i;
+                const char *p;
+
+                /* compose valid udev tag name */
+                for (p = path, i = 0; *p; p++) {
+                        if ((*p >= '0' && *p <= '9') ||
+                            (*p >= 'A' && *p <= 'Z') ||
+                            (*p >= 'a' && *p <= 'z') ||
+                            *p == '-') {
+                                tag[i++] = *p;
+                                continue;
+                        }
+
+                        /* skip all leading '_' */
+                        if (i == 0)
+                                continue;
+
+                        /* avoid second '_' */
+                        if (tag[i-1] == '_')
+                                continue;
+
+                        tag[i++] = '_';
+                }
+                /* strip trailing '_' */
+                while (i > 0 && tag[i-1] == '_')
+                        i--;
+                tag[i] = '\0';
+
+                udev_builtin_add_property(dev, test, "ID_PATH", path);
+                udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
+                free(path);
+                return EXIT_SUCCESS;
+        }
+        return EXIT_FAILURE;
+}
+
+const struct udev_builtin udev_builtin_path_id = {
+        .name = "path_id",
+        .cmd = builtin_path_id,
+        .help = "Compose persistent device path",
+        .run_once = true,
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-uaccess.c b/src/grp-udev/libudev-core/udev-builtin-uaccess.c
new file mode 100644
index 0000000000..2c27116ae9
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-uaccess.c
@@ -0,0 +1,88 @@
+/*
+ * manage device node user ACL
+ *
+ * Copyright 2010-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright 2010 Lennart Poettering
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <systemd/sd-login.h>
+
+#include "login-util.h"
+#include "logind-acl.h"
+#include "udev.h"
+#include "util.h"
+
+static int builtin_uaccess(struct udev_device *dev, int argc, char *argv[], bool test) {
+        int r;
+        const char *path = NULL, *seat;
+        bool changed_acl = false;
+        uid_t uid;
+
+        umask(0022);
+
+        /* don't muck around with ACLs when the system is not running systemd */
+        if (!logind_running())
+                return 0;
+
+        path = udev_device_get_devnode(dev);
+        seat = udev_device_get_property_value(dev, "ID_SEAT");
+        if (!seat)
+                seat = "seat0";
+
+        r = sd_seat_get_active(seat, NULL, &uid);
+        if (r == -ENXIO || r == -ENODATA) {
+                /* No active session on this seat */
+                r = 0;
+                goto finish;
+        } else if (r < 0) {
+                log_error("Failed to determine active user on seat %s.", seat);
+                goto finish;
+        }
+
+        r = devnode_acl(path, true, false, 0, true, uid);
+        if (r < 0) {
+                log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_ERR, r, "Failed to apply ACL on %s: %m", path);
+                goto finish;
+        }
+
+        changed_acl = true;
+        r = 0;
+
+finish:
+        if (path && !changed_acl) {
+                int k;
+
+                /* Better be safe than sorry and reset ACL */
+                k = devnode_acl(path, true, false, 0, false, 0);
+                if (k < 0) {
+                        log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, k, "Failed to apply ACL on %s: %m", path);
+                        if (r >= 0)
+                                r = k;
+                }
+        }
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_uaccess = {
+        .name = "uaccess",
+        .cmd = builtin_uaccess,
+        .help = "Manage device node user ACL",
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin-usb_id.c b/src/grp-udev/libudev-core/udev-builtin-usb_id.c
new file mode 100644
index 0000000000..587649eff0
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-usb_id.c
@@ -0,0 +1,473 @@
+/*
+ * USB device properties and persistent device path
+ *
+ * Copyright (c) 2005 SUSE Linux Products GmbH, Germany
+ *   Author: Hannes Reinecke <hare@suse.de>
+ *
+ * Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+static void set_usb_iftype(char *to, int if_class_num, size_t len) {
+        const char *type = "generic";
+
+        switch (if_class_num) {
+        case 1:
+                type = "audio";
+                break;
+        case 2: /* CDC-Control */
+                break;
+        case 3:
+                type = "hid";
+                break;
+        case 5: /* Physical */
+                break;
+        case 6:
+                type = "media";
+                break;
+        case 7:
+                type = "printer";
+                break;
+        case 8:
+                type = "storage";
+                break;
+        case 9:
+                type = "hub";
+                break;
+        case 0x0a: /* CDC-Data */
+                break;
+        case 0x0b: /* Chip/Smart Card */
+                break;
+        case 0x0d: /* Content Security */
+                break;
+        case 0x0e:
+                type = "video";
+                break;
+        case 0xdc: /* Diagnostic Device */
+                break;
+        case 0xe0: /* Wireless Controller */
+                break;
+        case 0xfe: /* Application-specific */
+                break;
+        case 0xff: /* Vendor-specific */
+                break;
+        default:
+                break;
+        }
+        strncpy(to, type, len);
+        to[len-1] = '\0';
+}
+
+static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len) {
+        int type_num = 0;
+        char *eptr;
+        const char *type = "generic";
+
+        type_num = strtoul(from, &eptr, 0);
+        if (eptr != from) {
+                switch (type_num) {
+                case 1: /* RBC devices */
+                        type = "rbc";
+                        break;
+                case 2:
+                        type = "atapi";
+                        break;
+                case 3:
+                        type = "tape";
+                        break;
+                case 4: /* UFI */
+                        type = "floppy";
+                        break;
+                case 6: /* Transparent SPC-2 devices */
+                        type = "scsi";
+                        break;
+                default:
+                        break;
+                }
+        }
+        strscpy(to, len, type);
+        return type_num;
+}
+
+static void set_scsi_type(char *to, const char *from, size_t len) {
+        int type_num;
+        char *eptr;
+        const char *type = "generic";
+
+        type_num = strtoul(from, &eptr, 0);
+        if (eptr != from) {
+                switch (type_num) {
+                case 0:
+                case 0xe:
+                        type = "disk";
+                        break;
+                case 1:
+                        type = "tape";
+                        break;
+                case 4:
+                case 7:
+                case 0xf:
+                        type = "optical";
+                        break;
+                case 5:
+                        type = "cd";
+                        break;
+                default:
+                        break;
+                }
+        }
+        strscpy(to, len, type);
+}
+
+#define USB_DT_DEVICE                        0x01
+#define USB_DT_INTERFACE                0x04
+
+static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len) {
+        _cleanup_free_ char *filename = NULL;
+        _cleanup_close_ int fd = -1;
+        ssize_t size;
+        unsigned char buf[18 + 65535];
+        size_t pos = 0;
+        unsigned strpos = 0;
+        struct usb_interface_descriptor {
+                uint8_t bLength;
+                uint8_t bDescriptorType;
+                uint8_t bInterfaceNumber;
+                uint8_t bAlternateSetting;
+                uint8_t bNumEndpoints;
+                uint8_t bInterfaceClass;
+                uint8_t bInterfaceSubClass;
+                uint8_t bInterfaceProtocol;
+                uint8_t iInterface;
+        } _packed_;
+
+        if (asprintf(&filename, "%s/descriptors", udev_device_get_syspath(dev)) < 0)
+                return log_oom();
+
+        fd = open(filename, O_RDONLY|O_CLOEXEC);
+        if (fd < 0)
+                return log_debug_errno(errno, "Error opening USB device 'descriptors' file: %m");
+
+        size = read(fd, buf, sizeof(buf));
+        if (size < 18 || size == sizeof(buf))
+                return -EIO;
+
+        ifs_str[0] = '\0';
+        while (pos + sizeof(struct usb_interface_descriptor) < (size_t) size &&
+               strpos + 7 < len - 2) {
+
+                struct usb_interface_descriptor *desc;
+                char if_str[8];
+
+                desc = (struct usb_interface_descriptor *) &buf[pos];
+                if (desc->bLength < 3)
+                        break;
+                pos += desc->bLength;
+
+                if (desc->bDescriptorType != USB_DT_INTERFACE)
+                        continue;
+
+                if (snprintf(if_str, 8, ":%02x%02x%02x",
+                             desc->bInterfaceClass,
+                             desc->bInterfaceSubClass,
+                             desc->bInterfaceProtocol) != 7)
+                        continue;
+
+                if (strstr(ifs_str, if_str) != NULL)
+                        continue;
+
+                memcpy(&ifs_str[strpos], if_str, 8),
+                strpos += 7;
+        }
+
+        if (strpos > 0) {
+                ifs_str[strpos++] = ':';
+                ifs_str[strpos++] = '\0';
+        }
+
+        return 0;
+}
+
+/*
+ * A unique USB identification is generated like this:
+ *
+ * 1.) Get the USB device type from InterfaceClass and InterfaceSubClass
+ * 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC',
+ *     use the SCSI vendor and model as USB-Vendor and USB-model.
+ * 3.) Otherwise, use the USB manufacturer and product as
+ *     USB-Vendor and USB-model. Any non-printable characters
+ *     in those strings will be skipped; a slash '/' will be converted
+ *     into a full stop '.'.
+ * 4.) If that fails, too, we will use idVendor and idProduct
+ *     as USB-Vendor and USB-model.
+ * 5.) The USB identification is the USB-vendor and USB-model
+ *     string concatenated with an underscore '_'.
+ * 6.) If the device supplies a serial number, this number
+ *     is concatenated with the identification with an underscore '_'.
+ */
+static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+        char vendor_str[64] = "";
+        char vendor_str_enc[256];
+        const char *vendor_id;
+        char model_str[64] = "";
+        char model_str_enc[256];
+        const char *product_id;
+        char serial_str[UTIL_NAME_SIZE] = "";
+        char packed_if_str[UTIL_NAME_SIZE] = "";
+        char revision_str[64] = "";
+        char type_str[64] = "";
+        char instance_str[64] = "";
+        const char *ifnum = NULL;
+        const char *driver = NULL;
+        char serial[256];
+
+        struct udev_device *dev_interface = NULL;
+        struct udev_device *dev_usb = NULL;
+        const char *if_class, *if_subclass;
+        int if_class_num;
+        int protocol = 0;
+        size_t l;
+        char *s;
+
+        assert(dev);
+
+        /* shortcut, if we are called directly for a "usb_device" type */
+        if (udev_device_get_devtype(dev) != NULL && streq(udev_device_get_devtype(dev), "usb_device")) {
+                dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
+                dev_usb = dev;
+                goto fallback;
+        }
+
+        /* usb interface directory */
+        dev_interface = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
+        if (dev_interface == NULL) {
+                log_debug("unable to access usb_interface device of '%s'",
+                     udev_device_get_syspath(dev));
+                return EXIT_FAILURE;
+        }
+
+        ifnum = udev_device_get_sysattr_value(dev_interface, "bInterfaceNumber");
+        driver = udev_device_get_sysattr_value(dev_interface, "driver");
+
+        if_class = udev_device_get_sysattr_value(dev_interface, "bInterfaceClass");
+        if (!if_class) {
+                log_debug("%s: cannot get bInterfaceClass attribute",
+                     udev_device_get_sysname(dev));
+                return EXIT_FAILURE;
+        }
+
+        if_class_num = strtoul(if_class, NULL, 16);
+        if (if_class_num == 8) {
+                /* mass storage */
+                if_subclass = udev_device_get_sysattr_value(dev_interface, "bInterfaceSubClass");
+                if (if_subclass != NULL)
+                        protocol = set_usb_mass_storage_ifsubtype(type_str, if_subclass, sizeof(type_str)-1);
+        } else {
+                set_usb_iftype(type_str, if_class_num, sizeof(type_str)-1);
+        }
+
+        log_debug("%s: if_class %d protocol %d",
+             udev_device_get_syspath(dev_interface), if_class_num, protocol);
+
+        /* usb device directory */
+        dev_usb = udev_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device");
+        if (!dev_usb) {
+                log_debug("unable to find parent 'usb' device of '%s'",
+                     udev_device_get_syspath(dev));
+                return EXIT_FAILURE;
+        }
+
+        /* all interfaces of the device in a single string */
+        dev_if_packed_info(dev_usb, packed_if_str, sizeof(packed_if_str));
+
+        /* mass storage : SCSI or ATAPI */
+        if (protocol == 6 || protocol == 2) {
+                struct udev_device *dev_scsi;
+                const char *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
+                int host, bus, target, lun;
+
+                /* get scsi device */
+                dev_scsi = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device");
+                if (dev_scsi == NULL) {
+                        log_debug("unable to find parent 'scsi' device of '%s'",
+                             udev_device_get_syspath(dev));
+                        goto fallback;
+                }
+                if (sscanf(udev_device_get_sysname(dev_scsi), "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
+                        log_debug("invalid scsi device '%s'", udev_device_get_sysname(dev_scsi));
+                        goto fallback;
+                }
+
+                /* Generic SPC-2 device */
+                scsi_vendor = udev_device_get_sysattr_value(dev_scsi, "vendor");
+                if (!scsi_vendor) {
+                        log_debug("%s: cannot get SCSI vendor attribute",
+                             udev_device_get_sysname(dev_scsi));
+                        goto fallback;
+                }
+                udev_util_encode_string(scsi_vendor, vendor_str_enc, sizeof(vendor_str_enc));
+                util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
+                util_replace_chars(vendor_str, NULL);
+
+                scsi_model = udev_device_get_sysattr_value(dev_scsi, "model");
+                if (!scsi_model) {
+                        log_debug("%s: cannot get SCSI model attribute",
+                             udev_device_get_sysname(dev_scsi));
+                        goto fallback;
+                }
+                udev_util_encode_string(scsi_model, model_str_enc, sizeof(model_str_enc));
+                util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
+                util_replace_chars(model_str, NULL);
+
+                scsi_type = udev_device_get_sysattr_value(dev_scsi, "type");
+                if (!scsi_type) {
+                        log_debug("%s: cannot get SCSI type attribute",
+                             udev_device_get_sysname(dev_scsi));
+                        goto fallback;
+                }
+                set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
+
+                scsi_rev = udev_device_get_sysattr_value(dev_scsi, "rev");
+                if (!scsi_rev) {
+                        log_debug("%s: cannot get SCSI revision attribute",
+                             udev_device_get_sysname(dev_scsi));
+                        goto fallback;
+                }
+                util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
+                util_replace_chars(revision_str, NULL);
+
+                /*
+                 * some broken devices have the same identifiers
+                 * for all luns, export the target:lun number
+                 */
+                sprintf(instance_str, "%d:%d", target, lun);
+        }
+
+fallback:
+        vendor_id = udev_device_get_sysattr_value(dev_usb, "idVendor");
+        product_id = udev_device_get_sysattr_value(dev_usb, "idProduct");
+
+        /* fallback to USB vendor & device */
+        if (vendor_str[0] == '\0') {
+                const char *usb_vendor = NULL;
+
+                usb_vendor = udev_device_get_sysattr_value(dev_usb, "manufacturer");
+                if (!usb_vendor)
+                        usb_vendor = vendor_id;
+                if (!usb_vendor) {
+                        log_debug("No USB vendor information available");
+                        return EXIT_FAILURE;
+                }
+                udev_util_encode_string(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
+                util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
+                util_replace_chars(vendor_str, NULL);
+        }
+
+        if (model_str[0] == '\0') {
+                const char *usb_model = NULL;
+
+                usb_model = udev_device_get_sysattr_value(dev_usb, "product");
+                if (!usb_model)
+                        usb_model = product_id;
+                if (!usb_model)
+                        return EXIT_FAILURE;
+                udev_util_encode_string(usb_model, model_str_enc, sizeof(model_str_enc));
+                util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
+                util_replace_chars(model_str, NULL);
+        }
+
+        if (revision_str[0] == '\0') {
+                const char *usb_rev;
+
+                usb_rev = udev_device_get_sysattr_value(dev_usb, "bcdDevice");
+                if (usb_rev) {
+                        util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
+                        util_replace_chars(revision_str, NULL);
+                }
+        }
+
+        if (serial_str[0] == '\0') {
+                const char *usb_serial;
+
+                usb_serial = udev_device_get_sysattr_value(dev_usb, "serial");
+                if (usb_serial) {
+                        const unsigned char *p;
+
+                        /* http://msdn.microsoft.com/en-us/library/windows/hardware/gg487321.aspx */
+                        for (p = (unsigned char *)usb_serial; *p != '\0'; p++)
+                                if (*p < 0x20 || *p > 0x7f || *p == ',') {
+                                        usb_serial = NULL;
+                                        break;
+                                }
+                }
+
+                if (usb_serial) {
+                        util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
+                        util_replace_chars(serial_str, NULL);
+                }
+        }
+
+        s = serial;
+        l = strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
+        if (!isempty(serial_str))
+                l = strpcpyl(&s, l, "_", serial_str, NULL);
+
+        if (!isempty(instance_str))
+                strpcpyl(&s, l, "-", instance_str, NULL);
+
+        udev_builtin_add_property(dev, test, "ID_VENDOR", vendor_str);
+        udev_builtin_add_property(dev, test, "ID_VENDOR_ENC", vendor_str_enc);
+        udev_builtin_add_property(dev, test, "ID_VENDOR_ID", vendor_id);
+        udev_builtin_add_property(dev, test, "ID_MODEL", model_str);
+        udev_builtin_add_property(dev, test, "ID_MODEL_ENC", model_str_enc);
+        udev_builtin_add_property(dev, test, "ID_MODEL_ID", product_id);
+        udev_builtin_add_property(dev, test, "ID_REVISION", revision_str);
+        udev_builtin_add_property(dev, test, "ID_SERIAL", serial);
+        if (!isempty(serial_str))
+                udev_builtin_add_property(dev, test, "ID_SERIAL_SHORT", serial_str);
+        if (!isempty(type_str))
+                udev_builtin_add_property(dev, test, "ID_TYPE", type_str);
+        if (!isempty(instance_str))
+                udev_builtin_add_property(dev, test, "ID_INSTANCE", instance_str);
+        udev_builtin_add_property(dev, test, "ID_BUS", "usb");
+        if (!isempty(packed_if_str))
+                udev_builtin_add_property(dev, test, "ID_USB_INTERFACES", packed_if_str);
+        if (ifnum != NULL)
+                udev_builtin_add_property(dev, test, "ID_USB_INTERFACE_NUM", ifnum);
+        if (driver != NULL)
+                udev_builtin_add_property(dev, test, "ID_USB_DRIVER", driver);
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_usb_id = {
+        .name = "usb_id",
+        .cmd = builtin_usb_id,
+        .help = "USB device properties",
+        .run_once = true,
+};
diff --git a/src/grp-udev/libudev-core/udev-builtin.c b/src/grp-udev/libudev-core/udev-builtin.c
new file mode 100644
index 0000000000..e6b36f124f
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin.c
@@ -0,0 +1,142 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2007-2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "string-util.h"
+#include "udev.h"
+
+static bool initialized;
+
+static const struct udev_builtin *builtins[] = {
+#ifdef HAVE_BLKID
+        [UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
+#endif
+        [UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
+        [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
+        [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
+        [UDEV_BUILTIN_KEYBOARD] = &udev_builtin_keyboard,
+#ifdef HAVE_KMOD
+        [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
+#endif
+        [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
+        [UDEV_BUILTIN_NET_LINK] = &udev_builtin_net_setup_link,
+        [UDEV_BUILTIN_PATH_ID] = &udev_builtin_path_id,
+        [UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
+#ifdef HAVE_ACL
+        [UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
+#endif
+};
+
+void udev_builtin_init(struct udev *udev) {
+        unsigned int i;
+
+        if (initialized)
+                return;
+
+        for (i = 0; i < ELEMENTSOF(builtins); i++)
+                if (builtins[i] && builtins[i]->init)
+                        builtins[i]->init(udev);
+
+        initialized = true;
+}
+
+void udev_builtin_exit(struct udev *udev) {
+        unsigned int i;
+
+        if (!initialized)
+                return;
+
+        for (i = 0; i < ELEMENTSOF(builtins); i++)
+                if (builtins[i] && builtins[i]->exit)
+                        builtins[i]->exit(udev);
+
+        initialized = false;
+}
+
+bool udev_builtin_validate(struct udev *udev) {
+        unsigned int i;
+
+        for (i = 0; i < ELEMENTSOF(builtins); i++)
+                if (builtins[i] && builtins[i]->validate && builtins[i]->validate(udev))
+                        return true;
+        return false;
+}
+
+void udev_builtin_list(struct udev *udev) {
+        unsigned int i;
+
+        for (i = 0; i < ELEMENTSOF(builtins); i++)
+                if (builtins[i])
+                        fprintf(stderr, "  %-14s  %s\n", builtins[i]->name, builtins[i]->help);
+}
+
+const char *udev_builtin_name(enum udev_builtin_cmd cmd) {
+        if (!builtins[cmd])
+                return NULL;
+
+        return builtins[cmd]->name;
+}
+
+bool udev_builtin_run_once(enum udev_builtin_cmd cmd) {
+        if (!builtins[cmd])
+                return false;
+
+        return builtins[cmd]->run_once;
+}
+
+enum udev_builtin_cmd udev_builtin_lookup(const char *command) {
+        char name[UTIL_PATH_SIZE];
+        enum udev_builtin_cmd i;
+        char *pos;
+
+        strscpy(name, sizeof(name), command);
+        pos = strchr(name, ' ');
+        if (pos)
+                pos[0] = '\0';
+        for (i = 0; i < ELEMENTSOF(builtins); i++)
+                if (builtins[i] && streq(builtins[i]->name, name))
+                        return i;
+        return UDEV_BUILTIN_MAX;
+}
+
+int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test) {
+        char arg[UTIL_PATH_SIZE];
+        int argc;
+        char *argv[128];
+
+        if (!builtins[cmd])
+                return -EOPNOTSUPP;
+
+        /* we need '0' here to reset the internal state */
+        optind = 0;
+        strscpy(arg, sizeof(arg), command);
+        udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
+        return builtins[cmd]->cmd(dev, argc, argv, test);
+}
+
+int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val) {
+        udev_device_add_property(dev, key, val);
+
+        if (test)
+                printf("%s=%s\n", key, val);
+        return 0;
+}
diff --git a/src/grp-udev/libudev-core/udev-ctrl.c b/src/grp-udev/libudev-core/udev-ctrl.c
new file mode 100644
index 0000000000..f68a09d7a8
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-ctrl.c
@@ -0,0 +1,462 @@
+/*
+ * libudev - interface to udev device information
+ *
+ * Copyright (C) 2008 Kay Sievers <kay@vrfy.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ */
+
+#include <errno.h>
+#include <poll.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "socket-util.h"
+#include "udev.h"
+
+/* wire protocol magic must match */
+#define UDEV_CTRL_MAGIC                                0xdead1dea
+
+enum udev_ctrl_msg_type {
+        UDEV_CTRL_UNKNOWN,
+        UDEV_CTRL_SET_LOG_LEVEL,
+        UDEV_CTRL_STOP_EXEC_QUEUE,
+        UDEV_CTRL_START_EXEC_QUEUE,
+        UDEV_CTRL_RELOAD,
+        UDEV_CTRL_SET_ENV,
+        UDEV_CTRL_SET_CHILDREN_MAX,
+        UDEV_CTRL_PING,
+        UDEV_CTRL_EXIT,
+};
+
+struct udev_ctrl_msg_wire {
+        char version[16];
+        unsigned int magic;
+        enum udev_ctrl_msg_type type;
+        union {
+                int intval;
+                char buf[256];
+        };
+};
+
+struct udev_ctrl_msg {
+        int refcount;
+        struct udev_ctrl_connection *conn;
+        struct udev_ctrl_msg_wire ctrl_msg_wire;
+};
+
+struct udev_ctrl {
+        int refcount;
+        struct udev *udev;
+        int sock;
+        union sockaddr_union saddr;
+        socklen_t addrlen;
+        bool bound;
+        bool cleanup_socket;
+        bool connected;
+};
+
+struct udev_ctrl_connection {
+        int refcount;
+        struct udev_ctrl *uctrl;
+        int sock;
+};
+
+struct udev_ctrl *udev_ctrl_new_from_fd(struct udev *udev, int fd) {
+        struct udev_ctrl *uctrl;
+        const int on = 1;
+        int r;
+
+        uctrl = new0(struct udev_ctrl, 1);
+        if (uctrl == NULL)
+                return NULL;
+        uctrl->refcount = 1;
+        uctrl->udev = udev;
+
+        if (fd < 0) {
+                uctrl->sock = socket(AF_LOCAL, SOCK_SEQPACKET|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
+                if (uctrl->sock < 0) {
+                        log_error_errno(errno, "error getting socket: %m");
+                        udev_ctrl_unref(uctrl);
+                        return NULL;
+                }
+        } else {
+                uctrl->bound = true;
+                uctrl->sock = fd;
+        }
+
+        /*
+         * FIXME: remove it as soon as we can depend on this:
+         *   http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=90c6bd34f884cd9cee21f1d152baf6c18bcac949
+         */
+        r = setsockopt(uctrl->sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
+        if (r < 0)
+                log_warning_errno(errno, "could not set SO_PASSCRED: %m");
+
+        uctrl->saddr.un.sun_family = AF_LOCAL;
+        strscpy(uctrl->saddr.un.sun_path, sizeof(uctrl->saddr.un.sun_path), "/run/udev/control");
+        uctrl->addrlen = SOCKADDR_UN_LEN(uctrl->saddr.un);
+        return uctrl;
+}
+
+struct udev_ctrl *udev_ctrl_new(struct udev *udev) {
+        return udev_ctrl_new_from_fd(udev, -1);
+}
+
+int udev_ctrl_enable_receiving(struct udev_ctrl *uctrl) {
+        int err;
+
+        if (!uctrl->bound) {
+                err = bind(uctrl->sock, &uctrl->saddr.sa, uctrl->addrlen);
+                if (err < 0 && errno == EADDRINUSE) {
+                        unlink(uctrl->saddr.un.sun_path);
+                        err = bind(uctrl->sock, &uctrl->saddr.sa, uctrl->addrlen);
+                }
+
+                if (err < 0)
+                        return log_error_errno(errno, "bind failed: %m");
+
+                err = listen(uctrl->sock, 0);
+                if (err < 0)
+                        return log_error_errno(errno, "listen failed: %m");
+
+                uctrl->bound = true;
+                uctrl->cleanup_socket = true;
+        }
+        return 0;
+}
+
+struct udev *udev_ctrl_get_udev(struct udev_ctrl *uctrl) {
+        return uctrl->udev;
+}
+
+static struct udev_ctrl *udev_ctrl_ref(struct udev_ctrl *uctrl) {
+        if (uctrl)
+                uctrl->refcount++;
+
+        return uctrl;
+}
+
+struct udev_ctrl *udev_ctrl_unref(struct udev_ctrl *uctrl) {
+        if (uctrl && -- uctrl->refcount == 0) {
+                if (uctrl->sock >= 0)
+                        close(uctrl->sock);
+                free(uctrl);
+        }
+
+        return NULL;
+}
+
+int udev_ctrl_cleanup(struct udev_ctrl *uctrl) {
+        if (uctrl == NULL)
+                return 0;
+        if (uctrl->cleanup_socket)
+                unlink(uctrl->saddr.un.sun_path);
+        return 0;
+}
+
+int udev_ctrl_get_fd(struct udev_ctrl *uctrl) {
+        if (uctrl == NULL)
+                return -EINVAL;
+        return uctrl->sock;
+}
+
+struct udev_ctrl_connection *udev_ctrl_get_connection(struct udev_ctrl *uctrl) {
+        struct udev_ctrl_connection *conn;
+        struct ucred ucred = {};
+        const int on = 1;
+        int r;
+
+        conn = new(struct udev_ctrl_connection, 1);
+        if (conn == NULL)
+                return NULL;
+        conn->refcount = 1;
+        conn->uctrl = uctrl;
+
+        conn->sock = accept4(uctrl->sock, NULL, NULL, SOCK_CLOEXEC|SOCK_NONBLOCK);
+        if (conn->sock < 0) {
+                if (errno != EINTR)
+                        log_error_errno(errno, "unable to receive ctrl connection: %m");
+                goto err;
+        }
+
+        /* check peer credential of connection */
+        r = getpeercred(conn->sock, &ucred);
+        if (r < 0) {
+                log_error_errno(r, "unable to receive credentials of ctrl connection: %m");
+                goto err;
+        }
+        if (ucred.uid > 0) {
+                log_error("sender uid="UID_FMT", message ignored", ucred.uid);
+                goto err;
+        }
+
+        /* enable receiving of the sender credentials in the messages */
+        r = setsockopt(conn->sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
+        if (r < 0)
+                log_warning_errno(errno, "could not set SO_PASSCRED: %m");
+
+        udev_ctrl_ref(uctrl);
+        return conn;
+err:
+        if (conn->sock >= 0)
+                close(conn->sock);
+        free(conn);
+        return NULL;
+}
+
+struct udev_ctrl_connection *udev_ctrl_connection_ref(struct udev_ctrl_connection *conn) {
+        if (conn == NULL)
+                return NULL;
+        conn->refcount++;
+        return conn;
+}
+
+struct udev_ctrl_connection *udev_ctrl_connection_unref(struct udev_ctrl_connection *conn) {
+        if (conn && -- conn->refcount == 0) {
+                if (conn->sock >= 0)
+                        close(conn->sock);
+
+                udev_ctrl_unref(conn->uctrl);
+
+                free(conn);
+        }
+
+        return NULL;
+}
+
+static int ctrl_send(struct udev_ctrl *uctrl, enum udev_ctrl_msg_type type, int intval, const char *buf, int timeout) {
+        struct udev_ctrl_msg_wire ctrl_msg_wire;
+        int err = 0;
+
+        memzero(&ctrl_msg_wire, sizeof(struct udev_ctrl_msg_wire));
+        strcpy(ctrl_msg_wire.version, "udev-" VERSION);
+        ctrl_msg_wire.magic = UDEV_CTRL_MAGIC;
+        ctrl_msg_wire.type = type;
+
+        if (buf != NULL)
+                strscpy(ctrl_msg_wire.buf, sizeof(ctrl_msg_wire.buf), buf);
+        else
+                ctrl_msg_wire.intval = intval;
+
+        if (!uctrl->connected) {
+                if (connect(uctrl->sock, &uctrl->saddr.sa, uctrl->addrlen) < 0) {
+                        err = -errno;
+                        goto out;
+                }
+                uctrl->connected = true;
+        }
+        if (send(uctrl->sock, &ctrl_msg_wire, sizeof(ctrl_msg_wire), 0) < 0) {
+                err = -errno;
+                goto out;
+        }
+
+        /* wait for peer message handling or disconnect */
+        for (;;) {
+                struct pollfd pfd[1];
+                int r;
+
+                pfd[0].fd = uctrl->sock;
+                pfd[0].events = POLLIN;
+                r = poll(pfd, 1, timeout * MSEC_PER_SEC);
+                if (r  < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        err = -errno;
+                        break;
+                }
+
+                if (r > 0 && pfd[0].revents & POLLERR) {
+                        err = -EIO;
+                        break;
+                }
+
+                if (r == 0)
+                        err = -ETIMEDOUT;
+                break;
+        }
+out:
+        return err;
+}
+
+int udev_ctrl_send_set_log_level(struct udev_ctrl *uctrl, int priority, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_SET_LOG_LEVEL, priority, NULL, timeout);
+}
+
+int udev_ctrl_send_stop_exec_queue(struct udev_ctrl *uctrl, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_STOP_EXEC_QUEUE, 0, NULL, timeout);
+}
+
+int udev_ctrl_send_start_exec_queue(struct udev_ctrl *uctrl, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_START_EXEC_QUEUE, 0, NULL, timeout);
+}
+
+int udev_ctrl_send_reload(struct udev_ctrl *uctrl, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_RELOAD, 0, NULL, timeout);
+}
+
+int udev_ctrl_send_set_env(struct udev_ctrl *uctrl, const char *key, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_SET_ENV, 0, key, timeout);
+}
+
+int udev_ctrl_send_set_children_max(struct udev_ctrl *uctrl, int count, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_SET_CHILDREN_MAX, count, NULL, timeout);
+}
+
+int udev_ctrl_send_ping(struct udev_ctrl *uctrl, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_PING, 0, NULL, timeout);
+}
+
+int udev_ctrl_send_exit(struct udev_ctrl *uctrl, int timeout) {
+        return ctrl_send(uctrl, UDEV_CTRL_EXIT, 0, NULL, timeout);
+}
+
+struct udev_ctrl_msg *udev_ctrl_receive_msg(struct udev_ctrl_connection *conn) {
+        struct udev_ctrl_msg *uctrl_msg;
+        ssize_t size;
+        struct cmsghdr *cmsg;
+        struct iovec iov;
+        char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
+        struct msghdr smsg = {
+                .msg_iov = &iov,
+                .msg_iovlen = 1,
+                .msg_control = cred_msg,
+                .msg_controllen = sizeof(cred_msg),
+        };
+        struct ucred *cred;
+
+        uctrl_msg = new0(struct udev_ctrl_msg, 1);
+        if (uctrl_msg == NULL)
+                return NULL;
+        uctrl_msg->refcount = 1;
+        uctrl_msg->conn = conn;
+        udev_ctrl_connection_ref(conn);
+
+        /* wait for the incoming message */
+        for (;;) {
+                struct pollfd pfd[1];
+                int r;
+
+                pfd[0].fd = conn->sock;
+                pfd[0].events = POLLIN;
+
+                r = poll(pfd, 1, 10000);
+                if (r  < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        goto err;
+                } else if (r == 0) {
+                        log_error("timeout waiting for ctrl message");
+                        goto err;
+                } else {
+                        if (!(pfd[0].revents & POLLIN)) {
+                                log_error_errno(errno, "ctrl connection error: %m");
+                                goto err;
+                        }
+                }
+
+                break;
+        }
+
+        iov.iov_base = &uctrl_msg->ctrl_msg_wire;
+        iov.iov_len = sizeof(struct udev_ctrl_msg_wire);
+
+        size = recvmsg(conn->sock, &smsg, 0);
+        if (size <  0) {
+                log_error_errno(errno, "unable to receive ctrl message: %m");
+                goto err;
+        }
+
+        cmsg_close_all(&smsg);
+
+        cmsg = CMSG_FIRSTHDR(&smsg);
+
+        if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
+                log_error("no sender credentials received, message ignored");
+                goto err;
+        }
+
+        cred = (struct ucred *) CMSG_DATA(cmsg);
+
+        if (cred->uid != 0) {
+                log_error("sender uid="UID_FMT", message ignored", cred->uid);
+                goto err;
+        }
+
+        if (uctrl_msg->ctrl_msg_wire.magic != UDEV_CTRL_MAGIC) {
+                log_error("message magic 0x%08x doesn't match, ignore it", uctrl_msg->ctrl_msg_wire.magic);
+                goto err;
+        }
+
+        return uctrl_msg;
+err:
+        udev_ctrl_msg_unref(uctrl_msg);
+        return NULL;
+}
+
+struct udev_ctrl_msg *udev_ctrl_msg_unref(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg && -- ctrl_msg->refcount == 0) {
+                udev_ctrl_connection_unref(ctrl_msg->conn);
+                free(ctrl_msg);
+        }
+
+        return NULL;
+}
+
+int udev_ctrl_get_set_log_level(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_SET_LOG_LEVEL)
+                return ctrl_msg->ctrl_msg_wire.intval;
+        return -1;
+}
+
+int udev_ctrl_get_stop_exec_queue(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_STOP_EXEC_QUEUE)
+                return 1;
+        return -1;
+}
+
+int udev_ctrl_get_start_exec_queue(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_START_EXEC_QUEUE)
+                return 1;
+        return -1;
+}
+
+int udev_ctrl_get_reload(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_RELOAD)
+                return 1;
+        return -1;
+}
+
+const char *udev_ctrl_get_set_env(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_SET_ENV)
+                return ctrl_msg->ctrl_msg_wire.buf;
+        return NULL;
+}
+
+int udev_ctrl_get_set_children_max(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_SET_CHILDREN_MAX)
+                return ctrl_msg->ctrl_msg_wire.intval;
+        return -1;
+}
+
+int udev_ctrl_get_ping(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_PING)
+                return 1;
+        return -1;
+}
+
+int udev_ctrl_get_exit(struct udev_ctrl_msg *ctrl_msg) {
+        if (ctrl_msg->ctrl_msg_wire.type == UDEV_CTRL_EXIT)
+                return 1;
+        return -1;
+}
diff --git a/src/grp-udev/libudev-core/udev-event.c b/src/grp-udev/libudev-core/udev-event.c
new file mode 100644
index 0000000000..8d601c9c2c
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-event.c
@@ -0,0 +1,943 @@
+/*
+ * Copyright (C) 2003-2013 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <poll.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/prctl.h>
+#include <sys/signalfd.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "netlink-util.h"
+#include "process-util.h"
+#include "signal-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+typedef struct Spawn {
+        const char *cmd;
+        pid_t pid;
+        usec_t timeout_warn;
+        usec_t timeout;
+        bool accept_failure;
+} Spawn;
+
+struct udev_event *udev_event_new(struct udev_device *dev) {
+        struct udev *udev = udev_device_get_udev(dev);
+        struct udev_event *event;
+
+        event = new0(struct udev_event, 1);
+        if (event == NULL)
+                return NULL;
+        event->dev = dev;
+        event->udev = udev;
+        udev_list_init(udev, &event->run_list, false);
+        udev_list_init(udev, &event->seclabel_list, false);
+        event->birth_usec = clock_boottime_or_monotonic();
+        return event;
+}
+
+void udev_event_unref(struct udev_event *event) {
+        if (event == NULL)
+                return;
+        sd_netlink_unref(event->rtnl);
+        udev_list_cleanup(&event->run_list);
+        udev_list_cleanup(&event->seclabel_list);
+        free(event->program_result);
+        free(event->name);
+        free(event);
+}
+
+size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size) {
+        struct udev_device *dev = event->dev;
+        enum subst_type {
+                SUBST_UNKNOWN,
+                SUBST_DEVNODE,
+                SUBST_ATTR,
+                SUBST_ENV,
+                SUBST_KERNEL,
+                SUBST_KERNEL_NUMBER,
+                SUBST_DRIVER,
+                SUBST_DEVPATH,
+                SUBST_ID,
+                SUBST_MAJOR,
+                SUBST_MINOR,
+                SUBST_RESULT,
+                SUBST_PARENT,
+                SUBST_NAME,
+                SUBST_LINKS,
+                SUBST_ROOT,
+                SUBST_SYS,
+        };
+        static const struct subst_map {
+                const char *name;
+                const char fmt;
+                enum subst_type type;
+        } map[] = {
+                { .name = "devnode",  .fmt = 'N', .type = SUBST_DEVNODE },
+                { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE },
+                { .name = "attr",     .fmt = 's', .type = SUBST_ATTR },
+                { .name = "sysfs",    .fmt = 's', .type = SUBST_ATTR },
+                { .name = "env",      .fmt = 'E', .type = SUBST_ENV },
+                { .name = "kernel",   .fmt = 'k', .type = SUBST_KERNEL },
+                { .name = "number",   .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
+                { .name = "driver",   .fmt = 'd', .type = SUBST_DRIVER },
+                { .name = "devpath",  .fmt = 'p', .type = SUBST_DEVPATH },
+                { .name = "id",       .fmt = 'b', .type = SUBST_ID },
+                { .name = "major",    .fmt = 'M', .type = SUBST_MAJOR },
+                { .name = "minor",    .fmt = 'm', .type = SUBST_MINOR },
+                { .name = "result",   .fmt = 'c', .type = SUBST_RESULT },
+                { .name = "parent",   .fmt = 'P', .type = SUBST_PARENT },
+                { .name = "name",     .fmt = 'D', .type = SUBST_NAME },
+                { .name = "links",    .fmt = 'L', .type = SUBST_LINKS },
+                { .name = "root",     .fmt = 'r', .type = SUBST_ROOT },
+                { .name = "sys",      .fmt = 'S', .type = SUBST_SYS },
+        };
+        const char *from;
+        char *s;
+        size_t l;
+
+        assert(dev);
+
+        from = src;
+        s = dest;
+        l = size;
+
+        for (;;) {
+                enum subst_type type = SUBST_UNKNOWN;
+                char attrbuf[UTIL_PATH_SIZE];
+                char *attr = NULL;
+
+                while (from[0] != '\0') {
+                        if (from[0] == '$') {
+                                /* substitute named variable */
+                                unsigned int i;
+
+                                if (from[1] == '$') {
+                                        from++;
+                                        goto copy;
+                                }
+
+                                for (i = 0; i < ELEMENTSOF(map); i++) {
+                                        if (startswith(&from[1], map[i].name)) {
+                                                type = map[i].type;
+                                                from += strlen(map[i].name)+1;
+                                                goto subst;
+                                        }
+                                }
+                        } else if (from[0] == '%') {
+                                /* substitute format char */
+                                unsigned int i;
+
+                                if (from[1] == '%') {
+                                        from++;
+                                        goto copy;
+                                }
+
+                                for (i = 0; i < ELEMENTSOF(map); i++) {
+                                        if (from[1] == map[i].fmt) {
+                                                type = map[i].type;
+                                                from += 2;
+                                                goto subst;
+                                        }
+                                }
+                        }
+copy:
+                        /* copy char */
+                        if (l == 0)
+                                goto out;
+                        s[0] = from[0];
+                        from++;
+                        s++;
+                        l--;
+                }
+
+                goto out;
+subst:
+                /* extract possible $format{attr} */
+                if (from[0] == '{') {
+                        unsigned int i;
+
+                        from++;
+                        for (i = 0; from[i] != '}'; i++) {
+                                if (from[i] == '\0') {
+                                        log_error("missing closing brace for format '%s'", src);
+                                        goto out;
+                                }
+                        }
+                        if (i >= sizeof(attrbuf))
+                                goto out;
+                        memcpy(attrbuf, from, i);
+                        attrbuf[i] = '\0';
+                        from += i+1;
+                        attr = attrbuf;
+                } else {
+                        attr = NULL;
+                }
+
+                switch (type) {
+                case SUBST_DEVPATH:
+                        l = strpcpy(&s, l, udev_device_get_devpath(dev));
+                        break;
+                case SUBST_KERNEL:
+                        l = strpcpy(&s, l, udev_device_get_sysname(dev));
+                        break;
+                case SUBST_KERNEL_NUMBER:
+                        if (udev_device_get_sysnum(dev) == NULL)
+                                break;
+                        l = strpcpy(&s, l, udev_device_get_sysnum(dev));
+                        break;
+                case SUBST_ID:
+                        if (event->dev_parent == NULL)
+                                break;
+                        l = strpcpy(&s, l, udev_device_get_sysname(event->dev_parent));
+                        break;
+                case SUBST_DRIVER: {
+                        const char *driver;
+
+                        if (event->dev_parent == NULL)
+                                break;
+
+                        driver = udev_device_get_driver(event->dev_parent);
+                        if (driver == NULL)
+                                break;
+                        l = strpcpy(&s, l, driver);
+                        break;
+                }
+                case SUBST_MAJOR: {
+                        char num[UTIL_PATH_SIZE];
+
+                        sprintf(num, "%u", major(udev_device_get_devnum(dev)));
+                        l = strpcpy(&s, l, num);
+                        break;
+                }
+                case SUBST_MINOR: {
+                        char num[UTIL_PATH_SIZE];
+
+                        sprintf(num, "%u", minor(udev_device_get_devnum(dev)));
+                        l = strpcpy(&s, l, num);
+                        break;
+                }
+                case SUBST_RESULT: {
+                        char *rest;
+                        int i;
+
+                        if (event->program_result == NULL)
+                                break;
+                        /* get part part of the result string */
+                        i = 0;
+                        if (attr != NULL)
+                                i = strtoul(attr, &rest, 10);
+                        if (i > 0) {
+                                char result[UTIL_PATH_SIZE];
+                                char tmp[UTIL_PATH_SIZE];
+                                char *cpos;
+
+                                strscpy(result, sizeof(result), event->program_result);
+                                cpos = result;
+                                while (--i) {
+                                        while (cpos[0] != '\0' && !isspace(cpos[0]))
+                                                cpos++;
+                                        while (isspace(cpos[0]))
+                                                cpos++;
+                                        if (cpos[0] == '\0')
+                                                break;
+                                }
+                                if (i > 0) {
+                                        log_error("requested part of result string not found");
+                                        break;
+                                }
+                                strscpy(tmp, sizeof(tmp), cpos);
+                                /* %{2+}c copies the whole string from the second part on */
+                                if (rest[0] != '+') {
+                                        cpos = strchr(tmp, ' ');
+                                        if (cpos)
+                                                cpos[0] = '\0';
+                                }
+                                l = strpcpy(&s, l, tmp);
+                        } else {
+                                l = strpcpy(&s, l, event->program_result);
+                        }
+                        break;
+                }
+                case SUBST_ATTR: {
+                        const char *value = NULL;
+                        char vbuf[UTIL_NAME_SIZE];
+                        size_t len;
+                        int count;
+
+                        if (attr == NULL) {
+                                log_error("missing file parameter for attr");
+                                break;
+                        }
+
+                        /* try to read the value specified by "[dmi/id]product_name" */
+                        if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0)
+                                value = vbuf;
+
+                        /* try to read the attribute the device */
+                        if (value == NULL)
+                                value = udev_device_get_sysattr_value(event->dev, attr);
+
+                        /* try to read the attribute of the parent device, other matches have selected */
+                        if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev)
+                                value = udev_device_get_sysattr_value(event->dev_parent, attr);
+
+                        if (value == NULL)
+                                break;
+
+                        /* strip trailing whitespace, and replace unwanted characters */
+                        if (value != vbuf)
+                                strscpy(vbuf, sizeof(vbuf), value);
+                        len = strlen(vbuf);
+                        while (len > 0 && isspace(vbuf[--len]))
+                                vbuf[len] = '\0';
+                        count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT);
+                        if (count > 0)
+                                log_debug("%i character(s) replaced" , count);
+                        l = strpcpy(&s, l, vbuf);
+                        break;
+                }
+                case SUBST_PARENT: {
+                        struct udev_device *dev_parent;
+                        const char *devnode;
+
+                        dev_parent = udev_device_get_parent(event->dev);
+                        if (dev_parent == NULL)
+                                break;
+                        devnode = udev_device_get_devnode(dev_parent);
+                        if (devnode != NULL)
+                                l = strpcpy(&s, l, devnode + strlen("/dev/"));
+                        break;
+                }
+                case SUBST_DEVNODE:
+                        if (udev_device_get_devnode(dev) != NULL)
+                                l = strpcpy(&s, l, udev_device_get_devnode(dev));
+                        break;
+                case SUBST_NAME:
+                        if (event->name != NULL)
+                                l = strpcpy(&s, l, event->name);
+                        else if (udev_device_get_devnode(dev) != NULL)
+                                l = strpcpy(&s, l, udev_device_get_devnode(dev) + strlen("/dev/"));
+                        else
+                                l = strpcpy(&s, l, udev_device_get_sysname(dev));
+                        break;
+                case SUBST_LINKS: {
+                        struct udev_list_entry *list_entry;
+
+                        list_entry = udev_device_get_devlinks_list_entry(dev);
+                        if (list_entry == NULL)
+                                break;
+                        l = strpcpy(&s, l, udev_list_entry_get_name(list_entry) + strlen("/dev/"));
+                        udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
+                                l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry) + strlen("/dev/"), NULL);
+                        break;
+                }
+                case SUBST_ROOT:
+                        l = strpcpy(&s, l, "/dev");
+                        break;
+                case SUBST_SYS:
+                        l = strpcpy(&s, l, "/sys");
+                        break;
+                case SUBST_ENV:
+                        if (attr == NULL) {
+                                break;
+                        } else {
+                                const char *value;
+
+                                value = udev_device_get_property_value(event->dev, attr);
+                                if (value == NULL)
+                                        break;
+                                l = strpcpy(&s, l, value);
+                                break;
+                        }
+                default:
+                        log_error("unknown substitution type=%i", type);
+                        break;
+                }
+        }
+
+out:
+        s[0] = '\0';
+        return l;
+}
+
+static int spawn_exec(struct udev_event *event,
+                      const char *cmd, char *const argv[], char **envp,
+                      int fd_stdout, int fd_stderr) {
+        _cleanup_close_ int fd = -1;
+        int r;
+
+        /* discard child output or connect to pipe */
+        fd = open("/dev/null", O_RDWR);
+        if (fd >= 0) {
+                r = dup2(fd, STDIN_FILENO);
+                if (r < 0)
+                        log_warning_errno(errno, "redirecting stdin failed: %m");
+
+                if (fd_stdout < 0) {
+                        r = dup2(fd, STDOUT_FILENO);
+                        if (r < 0)
+                                log_warning_errno(errno, "redirecting stdout failed: %m");
+                }
+
+                if (fd_stderr < 0) {
+                        r = dup2(fd, STDERR_FILENO);
+                        if (r < 0)
+                                log_warning_errno(errno, "redirecting stderr failed: %m");
+                }
+        } else
+                log_warning_errno(errno, "open /dev/null failed: %m");
+
+        /* connect pipes to std{out,err} */
+        if (fd_stdout >= 0) {
+                r = dup2(fd_stdout, STDOUT_FILENO);
+                if (r < 0)
+                        log_warning_errno(errno, "redirecting stdout failed: %m");
+
+                fd_stdout = safe_close(fd_stdout);
+        }
+
+        if (fd_stderr >= 0) {
+                r = dup2(fd_stderr, STDERR_FILENO);
+                if (r < 0)
+                        log_warning_errno(errno, "redirecting stdout failed: %m");
+
+                fd_stderr = safe_close(fd_stderr);
+        }
+
+        /* terminate child in case parent goes away */
+        prctl(PR_SET_PDEATHSIG, SIGTERM);
+
+        /* restore sigmask before exec */
+        (void) reset_signal_mask();
+
+        execve(argv[0], argv, envp);
+
+        /* exec failed */
+        return log_error_errno(errno, "failed to execute '%s' '%s': %m", argv[0], cmd);
+}
+
+static void spawn_read(struct udev_event *event,
+                       usec_t timeout_usec,
+                       const char *cmd,
+                       int fd_stdout, int fd_stderr,
+                       char *result, size_t ressize) {
+        _cleanup_close_ int fd_ep = -1;
+        struct epoll_event ep_outpipe = {
+                .events = EPOLLIN,
+                .data.ptr = &fd_stdout,
+        };
+        struct epoll_event ep_errpipe = {
+                .events = EPOLLIN,
+                .data.ptr = &fd_stderr,
+        };
+        size_t respos = 0;
+        int r;
+
+        /* read from child if requested */
+        if (fd_stdout < 0 && fd_stderr < 0)
+                return;
+
+        fd_ep = epoll_create1(EPOLL_CLOEXEC);
+        if (fd_ep < 0) {
+                log_error_errno(errno, "error creating epoll fd: %m");
+                return;
+        }
+
+        if (fd_stdout >= 0) {
+                r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe);
+                if (r < 0) {
+                        log_error_errno(errno, "fail to add stdout fd to epoll: %m");
+                        return;
+                }
+        }
+
+        if (fd_stderr >= 0) {
+                r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe);
+                if (r < 0) {
+                        log_error_errno(errno, "fail to add stderr fd to epoll: %m");
+                        return;
+                }
+        }
+
+        /* read child output */
+        while (fd_stdout >= 0 || fd_stderr >= 0) {
+                int timeout;
+                int fdcount;
+                struct epoll_event ev[4];
+                int i;
+
+                if (timeout_usec > 0) {
+                        usec_t age_usec;
+
+                        age_usec = clock_boottime_or_monotonic() - event->birth_usec;
+                        if (age_usec >= timeout_usec) {
+                                log_error("timeout '%s'", cmd);
+                                return;
+                        }
+                        timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC;
+                } else {
+                        timeout = -1;
+                }
+
+                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);
+                if (fdcount < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        log_error_errno(errno, "failed to poll: %m");
+                        return;
+                } else if (fdcount == 0) {
+                        log_error("timeout '%s'", cmd);
+                        return;
+                }
+
+                for (i = 0; i < fdcount; i++) {
+                        int *fd = (int *)ev[i].data.ptr;
+
+                        if (*fd < 0)
+                                continue;
+
+                        if (ev[i].events & EPOLLIN) {
+                                ssize_t count;
+                                char buf[4096];
+
+                                count = read(*fd, buf, sizeof(buf)-1);
+                                if (count <= 0)
+                                        continue;
+                                buf[count] = '\0';
+
+                                /* store stdout result */
+                                if (result != NULL && *fd == fd_stdout) {
+                                        if (respos + count < ressize) {
+                                                memcpy(&result[respos], buf, count);
+                                                respos += count;
+                                        } else {
+                                                log_error("'%s' ressize %zu too short", cmd, ressize);
+                                        }
+                                }
+
+                                /* log debug output only if we watch stderr */
+                                if (fd_stderr >= 0) {
+                                        char *pos;
+                                        char *line;
+
+                                        pos = buf;
+                                        while ((line = strsep(&pos, "\n"))) {
+                                                if (pos != NULL || line[0] != '\0')
+                                                        log_debug("'%s'(%s) '%s'", cmd, *fd == fd_stdout ? "out" : "err" , line);
+                                        }
+                                }
+                        } else if (ev[i].events & EPOLLHUP) {
+                                r = epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL);
+                                if (r < 0) {
+                                        log_error_errno(errno, "failed to remove fd from epoll: %m");
+                                        return;
+                                }
+                                *fd = -1;
+                        }
+                }
+        }
+
+        /* return the child's stdout string */
+        if (result != NULL)
+                result[respos] = '\0';
+}
+
+static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
+        Spawn *spawn = userdata;
+        char timeout[FORMAT_TIMESTAMP_RELATIVE_MAX];
+
+        assert(spawn);
+
+        kill_and_sigcont(spawn->pid, SIGKILL);
+
+        log_error("spawned process '%s' ["PID_FMT"] timed out after %s, killing", spawn->cmd, spawn->pid,
+                  format_timestamp_relative(timeout, sizeof(timeout), spawn->timeout));
+
+        return 1;
+}
+
+static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) {
+        Spawn *spawn = userdata;
+        char timeout[FORMAT_TIMESTAMP_RELATIVE_MAX];
+
+        assert(spawn);
+
+        log_warning("spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", spawn->cmd, spawn->pid,
+                    format_timestamp_relative(timeout, sizeof(timeout), spawn->timeout));
+
+        return 1;
+}
+
+static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) {
+        Spawn *spawn = userdata;
+
+        assert(spawn);
+
+        switch (si->si_code) {
+        case CLD_EXITED:
+                if (si->si_status == 0) {
+                        log_debug("Process '%s' succeeded.", spawn->cmd);
+                        sd_event_exit(sd_event_source_get_event(s), 0);
+
+                        return 1;
+                } else if (spawn->accept_failure)
+                        log_debug("Process '%s' failed with exit code %i.", spawn->cmd, si->si_status);
+                else
+                        log_warning("Process '%s' failed with exit code %i.", spawn->cmd, si->si_status);
+
+                break;
+        case CLD_KILLED:
+        case CLD_DUMPED:
+                log_warning("Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status));
+
+                break;
+        default:
+                log_error("Process '%s' failed due to unknown reason.", spawn->cmd);
+        }
+
+        sd_event_exit(sd_event_source_get_event(s), -EIO);
+
+        return 1;
+}
+
+static int spawn_wait(struct udev_event *event,
+                      usec_t timeout_usec,
+                      usec_t timeout_warn_usec,
+                      const char *cmd, pid_t pid,
+                      bool accept_failure) {
+        Spawn spawn = {
+                .cmd = cmd,
+                .pid = pid,
+                .accept_failure = accept_failure,
+        };
+        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+        int r, ret;
+
+        r = sd_event_new(&e);
+        if (r < 0)
+                return r;
+
+        if (timeout_usec > 0) {
+                usec_t usec, age_usec;
+
+                usec = now(clock_boottime_or_monotonic());
+                age_usec = usec - event->birth_usec;
+                if (age_usec < timeout_usec) {
+                        if (timeout_warn_usec > 0 && timeout_warn_usec < timeout_usec && age_usec < timeout_warn_usec) {
+                                spawn.timeout_warn = timeout_warn_usec - age_usec;
+
+                                r = sd_event_add_time(e, NULL, clock_boottime_or_monotonic(),
+                                                      usec + spawn.timeout_warn, USEC_PER_SEC,
+                                                      on_spawn_timeout_warning, &spawn);
+                                if (r < 0)
+                                        return r;
+                        }
+
+                        spawn.timeout = timeout_usec - age_usec;
+
+                        r = sd_event_add_time(e, NULL, clock_boottime_or_monotonic(),
+                                              usec + spawn.timeout, USEC_PER_SEC, on_spawn_timeout, &spawn);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        r = sd_event_add_child(e, NULL, pid, WEXITED, on_spawn_sigchld, &spawn);
+        if (r < 0)
+                return r;
+
+        r = sd_event_loop(e);
+        if (r < 0)
+                return r;
+
+        r = sd_event_get_exit_code(e, &ret);
+        if (r < 0)
+                return r;
+
+        return ret;
+}
+
+int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) {
+        int i = 0;
+        char *pos;
+
+        if (strchr(cmd, ' ') == NULL) {
+                argv[i++] = cmd;
+                goto out;
+        }
+
+        pos = cmd;
+        while (pos != NULL && pos[0] != '\0') {
+                if (pos[0] == '\'') {
+                        /* do not separate quotes */
+                        pos++;
+                        argv[i] = strsep(&pos, "\'");
+                        if (pos != NULL)
+                                while (pos[0] == ' ')
+                                        pos++;
+                } else {
+                        argv[i] = strsep(&pos, " ");
+                        if (pos != NULL)
+                                while (pos[0] == ' ')
+                                        pos++;
+                }
+                i++;
+        }
+out:
+        argv[i] = NULL;
+        if (argc)
+                *argc = i;
+        return 0;
+}
+
+int udev_event_spawn(struct udev_event *event,
+                     usec_t timeout_usec,
+                     usec_t timeout_warn_usec,
+                     bool accept_failure,
+                     const char *cmd,
+                     char *result, size_t ressize) {
+        int outpipe[2] = {-1, -1};
+        int errpipe[2] = {-1, -1};
+        pid_t pid;
+        int err = 0;
+
+        /* pipes from child to parent */
+        if (result != NULL || log_get_max_level() >= LOG_INFO) {
+                if (pipe2(outpipe, O_NONBLOCK) != 0) {
+                        err = log_error_errno(errno, "pipe failed: %m");
+                        goto out;
+                }
+        }
+        if (log_get_max_level() >= LOG_INFO) {
+                if (pipe2(errpipe, O_NONBLOCK) != 0) {
+                        err = log_error_errno(errno, "pipe failed: %m");
+                        goto out;
+                }
+        }
+
+        pid = fork();
+        switch(pid) {
+        case 0:
+        {
+                char arg[UTIL_PATH_SIZE];
+                char *argv[128];
+                char program[UTIL_PATH_SIZE];
+
+                /* child closes parent's ends of pipes */
+                outpipe[READ_END] = safe_close(outpipe[READ_END]);
+                errpipe[READ_END] = safe_close(errpipe[READ_END]);
+
+                strscpy(arg, sizeof(arg), cmd);
+                udev_build_argv(event->udev, arg, NULL, argv);
+
+                /* allow programs in /usr/lib/udev/ to be called without the path */
+                if (argv[0][0] != '/') {
+                        strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL);
+                        argv[0] = program;
+                }
+
+                log_debug("starting '%s'", cmd);
+
+                spawn_exec(event, cmd, argv, udev_device_get_properties_envp(event->dev),
+                           outpipe[WRITE_END], errpipe[WRITE_END]);
+
+                _exit(2);
+        }
+        case -1:
+                log_error_errno(errno, "fork of '%s' failed: %m", cmd);
+                err = -1;
+                goto out;
+        default:
+                /* parent closed child's ends of pipes */
+                outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]);
+                errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]);
+
+                spawn_read(event,
+                           timeout_usec,
+                           cmd,
+                           outpipe[READ_END], errpipe[READ_END],
+                           result, ressize);
+
+                err = spawn_wait(event, timeout_usec, timeout_warn_usec, cmd, pid, accept_failure);
+        }
+
+out:
+        if (outpipe[READ_END] >= 0)
+                close(outpipe[READ_END]);
+        if (outpipe[WRITE_END] >= 0)
+                close(outpipe[WRITE_END]);
+        if (errpipe[READ_END] >= 0)
+                close(errpipe[READ_END]);
+        if (errpipe[WRITE_END] >= 0)
+                close(errpipe[WRITE_END]);
+        return err;
+}
+
+static int rename_netif(struct udev_event *event) {
+        struct udev_device *dev = event->dev;
+        char name[IFNAMSIZ];
+        const char *oldname;
+        int r;
+
+        oldname = udev_device_get_sysname(dev);
+
+        strscpy(name, IFNAMSIZ, event->name);
+
+        r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name);
+        if (r < 0)
+                return log_error_errno(r, "Error changing net interface name '%s' to '%s': %m", oldname, name);
+
+        log_debug("renamed network interface '%s' to '%s'", oldname, name);
+
+        return 0;
+}
+
+void udev_event_execute_rules(struct udev_event *event,
+                              usec_t timeout_usec, usec_t timeout_warn_usec,
+                              struct udev_list *properties_list,
+                              struct udev_rules *rules) {
+        struct udev_device *dev = event->dev;
+
+        if (udev_device_get_subsystem(dev) == NULL)
+                return;
+
+        if (streq(udev_device_get_action(dev), "remove")) {
+                udev_device_read_db(dev);
+                udev_device_tag_index(dev, NULL, false);
+                udev_device_delete_db(dev);
+
+                if (major(udev_device_get_devnum(dev)) != 0)
+                        udev_watch_end(event->udev, dev);
+
+                udev_rules_apply_to_event(rules, event,
+                                          timeout_usec, timeout_warn_usec,
+                                          properties_list);
+
+                if (major(udev_device_get_devnum(dev)) != 0)
+                        udev_node_remove(dev);
+        } else {
+                event->dev_db = udev_device_clone_with_db(dev);
+                if (event->dev_db != NULL) {
+                        /* disable watch during event processing */
+                        if (major(udev_device_get_devnum(dev)) != 0)
+                                udev_watch_end(event->udev, event->dev_db);
+
+                        if (major(udev_device_get_devnum(dev)) == 0 &&
+                            streq(udev_device_get_action(dev), "move"))
+                                udev_device_copy_properties(dev, event->dev_db);
+                }
+
+                udev_rules_apply_to_event(rules, event,
+                                          timeout_usec, timeout_warn_usec,
+                                          properties_list);
+
+                /* rename a new network interface, if needed */
+                if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") &&
+                    event->name != NULL && !streq(event->name, udev_device_get_sysname(dev))) {
+                        int r;
+
+                        r = rename_netif(event);
+                        if (r < 0)
+                                log_warning_errno(r, "could not rename interface '%d' from '%s' to '%s': %m", udev_device_get_ifindex(dev),
+                                                  udev_device_get_sysname(dev), event->name);
+                        else {
+                                r = udev_device_rename(dev, event->name);
+                                if (r < 0)
+                                        log_warning_errno(r, "renamed interface '%d' from '%s' to '%s', but could not update udev_device: %m",
+                                                          udev_device_get_ifindex(dev), udev_device_get_sysname(dev), event->name);
+                                else
+                                        log_debug("changed devpath to '%s'", udev_device_get_devpath(dev));
+                        }
+                }
+
+                if (major(udev_device_get_devnum(dev)) > 0) {
+                        bool apply;
+
+                        /* remove/update possible left-over symlinks from old database entry */
+                        if (event->dev_db != NULL)
+                                udev_node_update_old_links(dev, event->dev_db);
+
+                        if (!event->owner_set)
+                                event->uid = udev_device_get_devnode_uid(dev);
+
+                        if (!event->group_set)
+                                event->gid = udev_device_get_devnode_gid(dev);
+
+                        if (!event->mode_set) {
+                                if (udev_device_get_devnode_mode(dev) > 0) {
+                                        /* kernel supplied value */
+                                        event->mode = udev_device_get_devnode_mode(dev);
+                                } else if (event->gid > 0) {
+                                        /* default 0660 if a group is assigned */
+                                        event->mode = 0660;
+                                } else {
+                                        /* default 0600 */
+                                        event->mode = 0600;
+                                }
+                        }
+
+                        apply = streq(udev_device_get_action(dev), "add") || event->owner_set || event->group_set || event->mode_set;
+                        udev_node_add(dev, apply, event->mode, event->uid, event->gid, &event->seclabel_list);
+                }
+
+                /* preserve old, or get new initialization timestamp */
+                udev_device_ensure_usec_initialized(event->dev, event->dev_db);
+
+                /* (re)write database file */
+                udev_device_tag_index(dev, event->dev_db, true);
+                udev_device_update_db(dev);
+                udev_device_set_is_initialized(dev);
+
+                event->dev_db = udev_device_unref(event->dev_db);
+        }
+}
+
+void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_t timeout_warn_usec) {
+        struct udev_list_entry *list_entry;
+
+        udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
+                char command[UTIL_PATH_SIZE];
+                const char *cmd = udev_list_entry_get_name(list_entry);
+                enum udev_builtin_cmd builtin_cmd = udev_list_entry_get_num(list_entry);
+
+                udev_event_apply_format(event, cmd, command, sizeof(command));
+
+                if (builtin_cmd < UDEV_BUILTIN_MAX)
+                        udev_builtin_run(event->dev, builtin_cmd, command, false);
+                else {
+                        if (event->exec_delay > 0) {
+                                log_debug("delay execution of '%s'", command);
+                                sleep(event->exec_delay);
+                        }
+
+                        udev_event_spawn(event, timeout_usec, timeout_warn_usec, false, command, NULL, 0);
+                }
+        }
+}
diff --git a/src/grp-udev/libudev-core/udev-node.c b/src/grp-udev/libudev-core/udev-node.c
new file mode 100644
index 0000000000..5d2997fd8f
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-node.c
@@ -0,0 +1,375 @@
+/*
+ * Copyright (C) 2003-2013 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "formats-util.h"
+#include "fs-util.h"
+#include "selinux-util.h"
+#include "smack-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+static int node_symlink(struct udev_device *dev, const char *node, const char *slink) {
+        struct stat stats;
+        char target[UTIL_PATH_SIZE];
+        char *s;
+        size_t l;
+        char slink_tmp[UTIL_PATH_SIZE + 32];
+        int i = 0;
+        int tail = 0;
+        int err = 0;
+
+        /* use relative link */
+        target[0] = '\0';
+        while (node[i] && (node[i] == slink[i])) {
+                if (node[i] == '/')
+                        tail = i+1;
+                i++;
+        }
+        s = target;
+        l = sizeof(target);
+        while (slink[i] != '\0') {
+                if (slink[i] == '/')
+                        l = strpcpy(&s, l, "../");
+                i++;
+        }
+        l = strscpy(s, l, &node[tail]);
+        if (l == 0) {
+                err = -EINVAL;
+                goto exit;
+        }
+
+        /* preserve link with correct target, do not replace node of other device */
+        if (lstat(slink, &stats) == 0) {
+                if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) {
+                        log_error("conflicting device node '%s' found, link to '%s' will not be created", slink, node);
+                        goto exit;
+                } else if (S_ISLNK(stats.st_mode)) {
+                        char buf[UTIL_PATH_SIZE];
+                        int len;
+
+                        len = readlink(slink, buf, sizeof(buf));
+                        if (len > 0 && len < (int)sizeof(buf)) {
+                                buf[len] = '\0';
+                                if (streq(target, buf)) {
+                                        log_debug("preserve already existing symlink '%s' to '%s'", slink, target);
+                                        label_fix(slink, true, false);
+                                        utimensat(AT_FDCWD, slink, NULL, AT_SYMLINK_NOFOLLOW);
+                                        goto exit;
+                                }
+                        }
+                }
+        } else {
+                log_debug("creating symlink '%s' to '%s'", slink, target);
+                do {
+                        err = mkdir_parents_label(slink, 0755);
+                        if (err != 0 && err != -ENOENT)
+                                break;
+                        mac_selinux_create_file_prepare(slink, S_IFLNK);
+                        err = symlink(target, slink);
+                        if (err != 0)
+                                err = -errno;
+                        mac_selinux_create_file_clear();
+                } while (err == -ENOENT);
+                if (err == 0)
+                        goto exit;
+        }
+
+        log_debug("atomically replace '%s'", slink);
+        strscpyl(slink_tmp, sizeof(slink_tmp), slink, ".tmp-", udev_device_get_id_filename(dev), NULL);
+        unlink(slink_tmp);
+        do {
+                err = mkdir_parents_label(slink_tmp, 0755);
+                if (err != 0 && err != -ENOENT)
+                        break;
+                mac_selinux_create_file_prepare(slink_tmp, S_IFLNK);
+                err = symlink(target, slink_tmp);
+                if (err != 0)
+                        err = -errno;
+                mac_selinux_create_file_clear();
+        } while (err == -ENOENT);
+        if (err != 0) {
+                log_error_errno(errno, "symlink '%s' '%s' failed: %m", target, slink_tmp);
+                goto exit;
+        }
+        err = rename(slink_tmp, slink);
+        if (err != 0) {
+                log_error_errno(errno, "rename '%s' '%s' failed: %m", slink_tmp, slink);
+                unlink(slink_tmp);
+        }
+exit:
+        return err;
+}
+
+/* find device node of device with highest priority */
+static const char *link_find_prioritized(struct udev_device *dev, bool add, const char *stackdir, char *buf, size_t bufsize) {
+        struct udev *udev = udev_device_get_udev(dev);
+        DIR *dir;
+        int priority = 0;
+        const char *target = NULL;
+
+        if (add) {
+                priority = udev_device_get_devlink_priority(dev);
+                strscpy(buf, bufsize, udev_device_get_devnode(dev));
+                target = buf;
+        }
+
+        dir = opendir(stackdir);
+        if (dir == NULL)
+                return target;
+        for (;;) {
+                struct udev_device *dev_db;
+                struct dirent *dent;
+
+                dent = readdir(dir);
+                if (dent == NULL || dent->d_name[0] == '\0')
+                        break;
+                if (dent->d_name[0] == '.')
+                        continue;
+
+                log_debug("found '%s' claiming '%s'", dent->d_name, stackdir);
+
+                /* did we find ourself? */
+                if (streq(dent->d_name, udev_device_get_id_filename(dev)))
+                        continue;
+
+                dev_db = udev_device_new_from_device_id(udev, dent->d_name);
+                if (dev_db != NULL) {
+                        const char *devnode;
+
+                        devnode = udev_device_get_devnode(dev_db);
+                        if (devnode != NULL) {
+                                if (target == NULL || udev_device_get_devlink_priority(dev_db) > priority) {
+                                        log_debug("'%s' claims priority %i for '%s'",
+                                                  udev_device_get_syspath(dev_db), udev_device_get_devlink_priority(dev_db), stackdir);
+                                        priority = udev_device_get_devlink_priority(dev_db);
+                                        strscpy(buf, bufsize, devnode);
+                                        target = buf;
+                                }
+                        }
+                        udev_device_unref(dev_db);
+                }
+        }
+        closedir(dir);
+        return target;
+}
+
+/* manage "stack of names" with possibly specified device priorities */
+static void link_update(struct udev_device *dev, const char *slink, bool add) {
+        char name_enc[UTIL_PATH_SIZE];
+        char filename[UTIL_PATH_SIZE * 2];
+        char dirname[UTIL_PATH_SIZE];
+        const char *target;
+        char buf[UTIL_PATH_SIZE];
+
+        util_path_encode(slink + strlen("/dev"), name_enc, sizeof(name_enc));
+        strscpyl(dirname, sizeof(dirname), "/run/udev/links/", name_enc, NULL);
+        strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
+
+        if (!add && unlink(filename) == 0)
+                rmdir(dirname);
+
+        target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
+        if (target == NULL) {
+                log_debug("no reference left, remove '%s'", slink);
+                if (unlink(slink) == 0)
+                        rmdir_parents(slink, "/");
+        } else {
+                log_debug("creating link '%s' to '%s'", slink, target);
+                node_symlink(dev, target, slink);
+        }
+
+        if (add) {
+                int err;
+
+                do {
+                        int fd;
+
+                        err = mkdir_parents(filename, 0755);
+                        if (err != 0 && err != -ENOENT)
+                                break;
+                        fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
+                        if (fd >= 0)
+                                close(fd);
+                        else
+                                err = -errno;
+                } while (err == -ENOENT);
+        }
+}
+
+void udev_node_update_old_links(struct udev_device *dev, struct udev_device *dev_old) {
+        struct udev_list_entry *list_entry;
+
+        /* update possible left-over symlinks */
+        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev_old)) {
+                const char *name = udev_list_entry_get_name(list_entry);
+                struct udev_list_entry *list_entry_current;
+                int found;
+
+                /* check if old link name still belongs to this device */
+                found = 0;
+                udev_list_entry_foreach(list_entry_current, udev_device_get_devlinks_list_entry(dev)) {
+                        const char *name_current = udev_list_entry_get_name(list_entry_current);
+
+                        if (streq(name, name_current)) {
+                                found = 1;
+                                break;
+                        }
+                }
+                if (found)
+                        continue;
+
+                log_debug("update old name, '%s' no longer belonging to '%s'",
+                     name, udev_device_get_devpath(dev));
+                link_update(dev, name, false);
+        }
+}
+
+static int node_permissions_apply(struct udev_device *dev, bool apply,
+                                  mode_t mode, uid_t uid, gid_t gid,
+                                  struct udev_list *seclabel_list) {
+        const char *devnode = udev_device_get_devnode(dev);
+        dev_t devnum = udev_device_get_devnum(dev);
+        struct stat stats;
+        struct udev_list_entry *entry;
+        int err = 0;
+
+        if (streq(udev_device_get_subsystem(dev), "block"))
+                mode |= S_IFBLK;
+        else
+                mode |= S_IFCHR;
+
+        if (lstat(devnode, &stats) != 0) {
+                err = log_debug_errno(errno, "can not stat() node '%s' (%m)", devnode);
+                goto out;
+        }
+
+        if (((stats.st_mode & S_IFMT) != (mode & S_IFMT)) || (stats.st_rdev != devnum)) {
+                err = -EEXIST;
+                log_debug("found node '%s' with non-matching devnum %s, skip handling",
+                          udev_device_get_devnode(dev), udev_device_get_id_filename(dev));
+                goto out;
+        }
+
+        if (apply) {
+                bool selinux = false;
+                bool smack = false;
+
+                if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
+                        log_debug("set permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
+                        err = chmod(devnode, mode);
+                        if (err < 0)
+                                log_warning_errno(errno, "setting mode of %s to %#o failed: %m", devnode, mode);
+                        err = chown(devnode, uid, gid);
+                        if (err < 0)
+                                log_warning_errno(errno, "setting owner of %s to uid=%u, gid=%u failed: %m", devnode, uid, gid);
+                } else {
+                        log_debug("preserve permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
+                }
+
+                /* apply SECLABEL{$module}=$label */
+                udev_list_entry_foreach(entry, udev_list_get_entry(seclabel_list)) {
+                        const char *name, *label;
+                        int r;
+
+                        name = udev_list_entry_get_name(entry);
+                        label = udev_list_entry_get_value(entry);
+
+                        if (streq(name, "selinux")) {
+                                selinux = true;
+
+                                r = mac_selinux_apply(devnode, label);
+                                if (r < 0)
+                                        log_error_errno(r, "SECLABEL: failed to set SELinux label '%s': %m", label);
+                                else
+                                        log_debug("SECLABEL: set SELinux label '%s'", label);
+
+                        } else if (streq(name, "smack")) {
+                                smack = true;
+
+                                r = mac_smack_apply(devnode, SMACK_ATTR_ACCESS, label);
+                                if (r < 0)
+                                        log_error_errno(r, "SECLABEL: failed to set SMACK label '%s': %m", label);
+                                else
+                                        log_debug("SECLABEL: set SMACK label '%s'", label);
+
+                        } else
+                                log_error("SECLABEL: unknown subsystem, ignoring '%s'='%s'", name, label);
+                }
+
+                /* set the defaults */
+                if (!selinux)
+                        mac_selinux_fix(devnode, true, false);
+                if (!smack)
+                        mac_smack_apply(devnode, SMACK_ATTR_ACCESS, NULL);
+        }
+
+        /* always update timestamp when we re-use the node, like on media change events */
+        utimensat(AT_FDCWD, devnode, NULL, 0);
+out:
+        return err;
+}
+
+void udev_node_add(struct udev_device *dev, bool apply,
+                   mode_t mode, uid_t uid, gid_t gid,
+                   struct udev_list *seclabel_list) {
+        char filename[UTIL_PATH_SIZE];
+        struct udev_list_entry *list_entry;
+
+        log_debug("handling device node '%s', devnum=%s, mode=%#o, uid="UID_FMT", gid="GID_FMT,
+                  udev_device_get_devnode(dev), udev_device_get_id_filename(dev), mode, uid, gid);
+
+        if (node_permissions_apply(dev, apply, mode, uid, gid, seclabel_list) < 0)
+                return;
+
+        /* always add /dev/{block,char}/$major:$minor */
+        xsprintf(filename, "/dev/%s/%u:%u",
+                 streq(udev_device_get_subsystem(dev), "block") ? "block" : "char",
+                 major(udev_device_get_devnum(dev)),
+                 minor(udev_device_get_devnum(dev)));
+        node_symlink(dev, udev_device_get_devnode(dev), filename);
+
+        /* create/update symlinks, add symlinks to name index */
+        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev))
+                        link_update(dev, udev_list_entry_get_name(list_entry), true);
+}
+
+void udev_node_remove(struct udev_device *dev) {
+        struct udev_list_entry *list_entry;
+        char filename[UTIL_PATH_SIZE];
+
+        /* remove/update symlinks, remove symlinks from name index */
+        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev))
+                link_update(dev, udev_list_entry_get_name(list_entry), false);
+
+        /* remove /dev/{block,char}/$major:$minor */
+        xsprintf(filename, "/dev/%s/%u:%u",
+                 streq(udev_device_get_subsystem(dev), "block") ? "block" : "char",
+                 major(udev_device_get_devnum(dev)),
+                 minor(udev_device_get_devnum(dev)));
+        unlink(filename);
+}
diff --git a/src/grp-udev/libudev-core/udev-rules.c b/src/grp-udev/libudev-core/udev-rules.c
new file mode 100644
index 0000000000..26fa52cf6c
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-rules.c
@@ -0,0 +1,2577 @@
+/*
+ * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fs-util.h"
+#include "glob-util.h"
+#include "path-util.h"
+#include "stat-util.h"
+#include "stdio-util.h"
+#include "strbuf.h"
+#include "string-util.h"
+#include "strv.h"
+#include "sysctl-util.h"
+#include "udev.h"
+#include "user-util.h"
+#include "util.h"
+
+#define PREALLOC_TOKEN          2048
+
+struct uid_gid {
+        unsigned int name_off;
+        union {
+                uid_t uid;
+                gid_t gid;
+        };
+};
+
+static const char* const rules_dirs[] = {
+        "/etc/udev/rules.d",
+        "/run/udev/rules.d",
+        UDEVLIBEXECDIR "/rules.d",
+        NULL
+};
+
+struct udev_rules {
+        struct udev *udev;
+        usec_t dirs_ts_usec;
+        int resolve_names;
+
+        /* every key in the rules file becomes a token */
+        struct token *tokens;
+        unsigned int token_cur;
+        unsigned int token_max;
+
+        /* all key strings are copied and de-duplicated in a single continuous string buffer */
+        struct strbuf *strbuf;
+
+        /* during rule parsing, uid/gid lookup results are cached */
+        struct uid_gid *uids;
+        unsigned int uids_cur;
+        unsigned int uids_max;
+        struct uid_gid *gids;
+        unsigned int gids_cur;
+        unsigned int gids_max;
+};
+
+static char *rules_str(struct udev_rules *rules, unsigned int off) {
+        return rules->strbuf->buf + off;
+}
+
+static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
+        return strbuf_add_string(rules->strbuf, s, strlen(s));
+}
+
+/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
+enum operation_type {
+        OP_UNSET,
+
+        OP_MATCH,
+        OP_NOMATCH,
+        OP_MATCH_MAX,
+
+        OP_ADD,
+        OP_REMOVE,
+        OP_ASSIGN,
+        OP_ASSIGN_FINAL,
+};
+
+enum string_glob_type {
+        GL_UNSET,
+        GL_PLAIN,                       /* no special chars */
+        GL_GLOB,                        /* shell globs ?,*,[] */
+        GL_SPLIT,                       /* multi-value A|B */
+        GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
+        GL_SOMETHING,                   /* commonly used "?*" */
+};
+
+enum string_subst_type {
+        SB_UNSET,
+        SB_NONE,
+        SB_FORMAT,
+        SB_SUBSYS,
+};
+
+/* tokens of a rule are sorted/handled in this order */
+enum token_type {
+        TK_UNSET,
+        TK_RULE,
+
+        TK_M_ACTION,                    /* val */
+        TK_M_DEVPATH,                   /* val */
+        TK_M_KERNEL,                    /* val */
+        TK_M_DEVLINK,                   /* val */
+        TK_M_NAME,                      /* val */
+        TK_M_ENV,                       /* val, attr */
+        TK_M_TAG,                       /* val */
+        TK_M_SUBSYSTEM,                 /* val */
+        TK_M_DRIVER,                    /* val */
+        TK_M_WAITFOR,                   /* val */
+        TK_M_ATTR,                      /* val, attr */
+        TK_M_SYSCTL,                    /* val, attr */
+
+        TK_M_PARENTS_MIN,
+        TK_M_KERNELS,                   /* val */
+        TK_M_SUBSYSTEMS,                /* val */
+        TK_M_DRIVERS,                   /* val */
+        TK_M_ATTRS,                     /* val, attr */
+        TK_M_TAGS,                      /* val */
+        TK_M_PARENTS_MAX,
+
+        TK_M_TEST,                      /* val, mode_t */
+        TK_M_PROGRAM,                   /* val */
+        TK_M_IMPORT_FILE,               /* val */
+        TK_M_IMPORT_PROG,               /* val */
+        TK_M_IMPORT_BUILTIN,            /* val */
+        TK_M_IMPORT_DB,                 /* val */
+        TK_M_IMPORT_CMDLINE,            /* val */
+        TK_M_IMPORT_PARENT,             /* val */
+        TK_M_RESULT,                    /* val */
+        TK_M_MAX,
+
+        TK_A_STRING_ESCAPE_NONE,
+        TK_A_STRING_ESCAPE_REPLACE,
+        TK_A_DB_PERSIST,
+        TK_A_INOTIFY_WATCH,             /* int */
+        TK_A_DEVLINK_PRIO,              /* int */
+        TK_A_OWNER,                     /* val */
+        TK_A_GROUP,                     /* val */
+        TK_A_MODE,                      /* val */
+        TK_A_OWNER_ID,                  /* uid_t */
+        TK_A_GROUP_ID,                  /* gid_t */
+        TK_A_MODE_ID,                   /* mode_t */
+        TK_A_TAG,                       /* val */
+        TK_A_STATIC_NODE,               /* val */
+        TK_A_SECLABEL,                  /* val, attr */
+        TK_A_ENV,                       /* val, attr */
+        TK_A_NAME,                      /* val */
+        TK_A_DEVLINK,                   /* val */
+        TK_A_ATTR,                      /* val, attr */
+        TK_A_SYSCTL,                    /* val, attr */
+        TK_A_RUN_BUILTIN,               /* val, bool */
+        TK_A_RUN_PROGRAM,               /* val, bool */
+        TK_A_GOTO,                      /* size_t */
+
+        TK_END,
+};
+
+/* we try to pack stuff in a way that we take only 12 bytes per token */
+struct token {
+        union {
+                unsigned char type;                /* same in rule and key */
+                struct {
+                        enum token_type type:8;
+                        bool can_set_name:1;
+                        bool has_static_node:1;
+                        unsigned int unused:6;
+                        unsigned short token_count;
+                        unsigned int label_off;
+                        unsigned short filename_off;
+                        unsigned short filename_line;
+                } rule;
+                struct {
+                        enum token_type type:8;
+                        enum operation_type op:8;
+                        enum string_glob_type glob:8;
+                        enum string_subst_type subst:4;
+                        enum string_subst_type attrsubst:4;
+                        unsigned int value_off;
+                        union {
+                                unsigned int attr_off;
+                                unsigned int rule_goto;
+                                mode_t  mode;
+                                uid_t uid;
+                                gid_t gid;
+                                int devlink_prio;
+                                int watch;
+                                enum udev_builtin_cmd builtin_cmd;
+                        };
+                } key;
+        };
+};
+
+#define MAX_TK                64
+struct rule_tmp {
+        struct udev_rules *rules;
+        struct token rule;
+        struct token token[MAX_TK];
+        unsigned int token_cur;
+};
+
+#ifdef DEBUG
+static const char *operation_str(enum operation_type type) {
+        static const char *operation_strs[] = {
+                [OP_UNSET] =            "UNSET",
+                [OP_MATCH] =            "match",
+                [OP_NOMATCH] =          "nomatch",
+                [OP_MATCH_MAX] =        "MATCH_MAX",
+
+                [OP_ADD] =              "add",
+                [OP_REMOVE] =           "remove",
+                [OP_ASSIGN] =           "assign",
+                [OP_ASSIGN_FINAL] =     "assign-final",
+}        ;
+
+        return operation_strs[type];
+}
+
+static const char *string_glob_str(enum string_glob_type type) {
+        static const char *string_glob_strs[] = {
+                [GL_UNSET] =            "UNSET",
+                [GL_PLAIN] =            "plain",
+                [GL_GLOB] =             "glob",
+                [GL_SPLIT] =            "split",
+                [GL_SPLIT_GLOB] =       "split-glob",
+                [GL_SOMETHING] =        "split-glob",
+        };
+
+        return string_glob_strs[type];
+}
+
+static const char *token_str(enum token_type type) {
+        static const char *token_strs[] = {
+                [TK_UNSET] =                    "UNSET",
+                [TK_RULE] =                     "RULE",
+
+                [TK_M_ACTION] =                 "M ACTION",
+                [TK_M_DEVPATH] =                "M DEVPATH",
+                [TK_M_KERNEL] =                 "M KERNEL",
+                [TK_M_DEVLINK] =                "M DEVLINK",
+                [TK_M_NAME] =                   "M NAME",
+                [TK_M_ENV] =                    "M ENV",
+                [TK_M_TAG] =                    "M TAG",
+                [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
+                [TK_M_DRIVER] =                 "M DRIVER",
+                [TK_M_WAITFOR] =                "M WAITFOR",
+                [TK_M_ATTR] =                   "M ATTR",
+                [TK_M_SYSCTL] =                 "M SYSCTL",
+
+                [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
+                [TK_M_KERNELS] =                "M KERNELS",
+                [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
+                [TK_M_DRIVERS] =                "M DRIVERS",
+                [TK_M_ATTRS] =                  "M ATTRS",
+                [TK_M_TAGS] =                   "M TAGS",
+                [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
+
+                [TK_M_TEST] =                   "M TEST",
+                [TK_M_PROGRAM] =                "M PROGRAM",
+                [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
+                [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
+                [TK_M_IMPORT_BUILTIN] =         "M IMPORT_BUILTIN",
+                [TK_M_IMPORT_DB] =              "M IMPORT_DB",
+                [TK_M_IMPORT_CMDLINE] =         "M IMPORT_CMDLINE",
+                [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
+                [TK_M_RESULT] =                 "M RESULT",
+                [TK_M_MAX] =                    "M MAX",
+
+                [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
+                [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
+                [TK_A_DB_PERSIST] =             "A DB_PERSIST",
+                [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
+                [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
+                [TK_A_OWNER] =                  "A OWNER",
+                [TK_A_GROUP] =                  "A GROUP",
+                [TK_A_MODE] =                   "A MODE",
+                [TK_A_OWNER_ID] =               "A OWNER_ID",
+                [TK_A_GROUP_ID] =               "A GROUP_ID",
+                [TK_A_STATIC_NODE] =            "A STATIC_NODE",
+                [TK_A_SECLABEL] =               "A SECLABEL",
+                [TK_A_MODE_ID] =                "A MODE_ID",
+                [TK_A_ENV] =                    "A ENV",
+                [TK_A_TAG] =                    "A ENV",
+                [TK_A_NAME] =                   "A NAME",
+                [TK_A_DEVLINK] =                "A DEVLINK",
+                [TK_A_ATTR] =                   "A ATTR",
+                [TK_A_SYSCTL] =                 "A SYSCTL",
+                [TK_A_RUN_BUILTIN] =            "A RUN_BUILTIN",
+                [TK_A_RUN_PROGRAM] =            "A RUN_PROGRAM",
+                [TK_A_GOTO] =                   "A GOTO",
+
+                [TK_END] =                      "END",
+        };
+
+        return token_strs[type];
+}
+
+static void dump_token(struct udev_rules *rules, struct token *token) {
+        enum token_type type = token->type;
+        enum operation_type op = token->key.op;
+        enum string_glob_type glob = token->key.glob;
+        const char *value = rules_str(rules, token->key.value_off);
+        const char *attr = &rules->strbuf->buf[token->key.attr_off];
+
+        switch (type) {
+        case TK_RULE:
+                {
+                        const char *tks_ptr = (char *)rules->tokens;
+                        const char *tk_ptr = (char *)token;
+                        unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
+
+                        log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
+                                  &rules->strbuf->buf[token->rule.filename_off], token->rule.filename_line,
+                                  idx, token->rule.token_count,
+                                  &rules->strbuf->buf[token->rule.label_off]);
+                        break;
+                }
+        case TK_M_ACTION:
+        case TK_M_DEVPATH:
+        case TK_M_KERNEL:
+        case TK_M_SUBSYSTEM:
+        case TK_M_DRIVER:
+        case TK_M_WAITFOR:
+        case TK_M_DEVLINK:
+        case TK_M_NAME:
+        case TK_M_KERNELS:
+        case TK_M_SUBSYSTEMS:
+        case TK_M_DRIVERS:
+        case TK_M_TAGS:
+        case TK_M_PROGRAM:
+        case TK_M_IMPORT_FILE:
+        case TK_M_IMPORT_PROG:
+        case TK_M_IMPORT_DB:
+        case TK_M_IMPORT_CMDLINE:
+        case TK_M_IMPORT_PARENT:
+        case TK_M_RESULT:
+        case TK_A_NAME:
+        case TK_A_DEVLINK:
+        case TK_A_OWNER:
+        case TK_A_GROUP:
+        case TK_A_MODE:
+        case TK_A_RUN_BUILTIN:
+        case TK_A_RUN_PROGRAM:
+                log_debug("%s %s '%s'(%s)",
+                          token_str(type), operation_str(op), value, string_glob_str(glob));
+                break;
+        case TK_M_IMPORT_BUILTIN:
+                log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
+                break;
+        case TK_M_ATTR:
+        case TK_M_SYSCTL:
+        case TK_M_ATTRS:
+        case TK_M_ENV:
+        case TK_A_ATTR:
+        case TK_A_SYSCTL:
+        case TK_A_ENV:
+                log_debug("%s %s '%s' '%s'(%s)",
+                          token_str(type), operation_str(op), attr, value, string_glob_str(glob));
+                break;
+        case TK_M_TAG:
+        case TK_A_TAG:
+                log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
+                break;
+        case TK_A_STRING_ESCAPE_NONE:
+        case TK_A_STRING_ESCAPE_REPLACE:
+        case TK_A_DB_PERSIST:
+                log_debug("%s", token_str(type));
+                break;
+        case TK_M_TEST:
+                log_debug("%s %s '%s'(%s) %#o",
+                          token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
+                break;
+        case TK_A_INOTIFY_WATCH:
+                log_debug("%s %u", token_str(type), token->key.watch);
+                break;
+        case TK_A_DEVLINK_PRIO:
+                log_debug("%s %u", token_str(type), token->key.devlink_prio);
+                break;
+        case TK_A_OWNER_ID:
+                log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
+                break;
+        case TK_A_GROUP_ID:
+                log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
+                break;
+        case TK_A_MODE_ID:
+                log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
+                break;
+        case TK_A_STATIC_NODE:
+                log_debug("%s '%s'", token_str(type), value);
+                break;
+        case TK_A_SECLABEL:
+                log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
+                break;
+        case TK_A_GOTO:
+                log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
+                break;
+        case TK_END:
+                log_debug("* %s", token_str(type));
+                break;
+        case TK_M_PARENTS_MIN:
+        case TK_M_PARENTS_MAX:
+        case TK_M_MAX:
+        case TK_UNSET:
+                log_debug("unknown type %u", type);
+                break;
+        }
+}
+
+static void dump_rules(struct udev_rules *rules) {
+        unsigned int i;
+
+        log_debug("dumping %u (%zu bytes) tokens, %zu (%zu bytes) strings",
+                  rules->token_cur,
+                  rules->token_cur * sizeof(struct token),
+                  rules->strbuf->nodes_count,
+                  rules->strbuf->len);
+        for (i = 0; i < rules->token_cur; i++)
+                dump_token(rules, &rules->tokens[i]);
+}
+#else
+static inline void dump_token(struct udev_rules *rules, struct token *token) {}
+static inline void dump_rules(struct udev_rules *rules) {}
+#endif /* DEBUG */
+
+static int add_token(struct udev_rules *rules, struct token *token) {
+        /* grow buffer if needed */
+        if (rules->token_cur+1 >= rules->token_max) {
+                struct token *tokens;
+                unsigned int add;
+
+                /* double the buffer size */
+                add = rules->token_max;
+                if (add < 8)
+                        add = 8;
+
+                tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
+                if (tokens == NULL)
+                        return -1;
+                rules->tokens = tokens;
+                rules->token_max += add;
+        }
+        memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
+        rules->token_cur++;
+        return 0;
+}
+
+static uid_t add_uid(struct udev_rules *rules, const char *owner) {
+        unsigned int i;
+        uid_t uid = 0;
+        unsigned int off;
+        int r;
+
+        /* lookup, if we know it already */
+        for (i = 0; i < rules->uids_cur; i++) {
+                off = rules->uids[i].name_off;
+                if (streq(rules_str(rules, off), owner)) {
+                        uid = rules->uids[i].uid;
+                        return uid;
+                }
+        }
+        r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
+        if (r < 0) {
+                if (r == -ENOENT || r == -ESRCH)
+                        log_error("specified user '%s' unknown", owner);
+                else
+                        log_error_errno(r, "error resolving user '%s': %m", owner);
+        }
+
+        /* grow buffer if needed */
+        if (rules->uids_cur+1 >= rules->uids_max) {
+                struct uid_gid *uids;
+                unsigned int add;
+
+                /* double the buffer size */
+                add = rules->uids_max;
+                if (add < 1)
+                        add = 8;
+
+                uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
+                if (uids == NULL)
+                        return uid;
+                rules->uids = uids;
+                rules->uids_max += add;
+        }
+        rules->uids[rules->uids_cur].uid = uid;
+        off = rules_add_string(rules, owner);
+        if (off <= 0)
+                return uid;
+        rules->uids[rules->uids_cur].name_off = off;
+        rules->uids_cur++;
+        return uid;
+}
+
+static gid_t add_gid(struct udev_rules *rules, const char *group) {
+        unsigned int i;
+        gid_t gid = 0;
+        unsigned int off;
+        int r;
+
+        /* lookup, if we know it already */
+        for (i = 0; i < rules->gids_cur; i++) {
+                off = rules->gids[i].name_off;
+                if (streq(rules_str(rules, off), group)) {
+                        gid = rules->gids[i].gid;
+                        return gid;
+                }
+        }
+        r = get_group_creds(&group, &gid);
+        if (r < 0) {
+                if (r == -ENOENT || r == -ESRCH)
+                        log_error("specified group '%s' unknown", group);
+                else
+                        log_error_errno(r, "error resolving group '%s': %m", group);
+        }
+
+        /* grow buffer if needed */
+        if (rules->gids_cur+1 >= rules->gids_max) {
+                struct uid_gid *gids;
+                unsigned int add;
+
+                /* double the buffer size */
+                add = rules->gids_max;
+                if (add < 1)
+                        add = 8;
+
+                gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
+                if (gids == NULL)
+                        return gid;
+                rules->gids = gids;
+                rules->gids_max += add;
+        }
+        rules->gids[rules->gids_cur].gid = gid;
+        off = rules_add_string(rules, group);
+        if (off <= 0)
+                return gid;
+        rules->gids[rules->gids_cur].name_off = off;
+        rules->gids_cur++;
+        return gid;
+}
+
+static int import_property_from_string(struct udev_device *dev, char *line) {
+        char *key;
+        char *val;
+        size_t len;
+
+        /* find key */
+        key = line;
+        while (isspace(key[0]))
+                key++;
+
+        /* comment or empty line */
+        if (key[0] == '#' || key[0] == '\0')
+                return -1;
+
+        /* split key/value */
+        val = strchr(key, '=');
+        if (val == NULL)
+                return -1;
+        val[0] = '\0';
+        val++;
+
+        /* find value */
+        while (isspace(val[0]))
+                val++;
+
+        /* terminate key */
+        len = strlen(key);
+        if (len == 0)
+                return -1;
+        while (isspace(key[len-1]))
+                len--;
+        key[len] = '\0';
+
+        /* terminate value */
+        len = strlen(val);
+        if (len == 0)
+                return -1;
+        while (isspace(val[len-1]))
+                len--;
+        val[len] = '\0';
+
+        if (len == 0)
+                return -1;
+
+        /* unquote */
+        if (val[0] == '"' || val[0] == '\'') {
+                if (val[len-1] != val[0]) {
+                        log_debug("inconsistent quoting: '%s', skip", line);
+                        return -1;
+                }
+                val[len-1] = '\0';
+                val++;
+        }
+
+        udev_device_add_property(dev, key, val);
+
+        return 0;
+}
+
+static int import_file_into_properties(struct udev_device *dev, const char *filename) {
+        FILE *f;
+        char line[UTIL_LINE_SIZE];
+
+        f = fopen(filename, "re");
+        if (f == NULL)
+                return -1;
+        while (fgets(line, sizeof(line), f) != NULL)
+                import_property_from_string(dev, line);
+        fclose(f);
+        return 0;
+}
+
+static int import_program_into_properties(struct udev_event *event,
+                                          usec_t timeout_usec,
+                                          usec_t timeout_warn_usec,
+                                          const char *program) {
+        char result[UTIL_LINE_SIZE];
+        char *line;
+        int err;
+
+        err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result));
+        if (err < 0)
+                return err;
+
+        line = result;
+        while (line != NULL) {
+                char *pos;
+
+                pos = strchr(line, '\n');
+                if (pos != NULL) {
+                        pos[0] = '\0';
+                        pos = &pos[1];
+                }
+                import_property_from_string(event->dev, line);
+                line = pos;
+        }
+        return 0;
+}
+
+static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
+        struct udev_device *dev_parent;
+        struct udev_list_entry *list_entry;
+
+        assert(dev);
+        assert(filter);
+
+        dev_parent = udev_device_get_parent(dev);
+        if (dev_parent == NULL)
+                return -1;
+
+        udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
+                const char *key = udev_list_entry_get_name(list_entry);
+                const char *val = udev_list_entry_get_value(list_entry);
+
+                if (fnmatch(filter, key, 0) == 0)
+                        udev_device_add_property(dev, key, val);
+        }
+        return 0;
+}
+
+static void attr_subst_subdir(char *attr, size_t len) {
+        const char *pos, *tail, *path;
+        _cleanup_closedir_ DIR *dir = NULL;
+        struct dirent *dent;
+
+        pos = strstr(attr, "/*/");
+        if (!pos)
+            return;
+
+        tail = pos + 2;
+        path = strndupa(attr, pos - attr + 1); /* include slash at end */
+        dir = opendir(path);
+        if (dir == NULL)
+                return;
+
+        for (dent = readdir(dir); dent != NULL; dent = readdir(dir))
+                if (dent->d_name[0] != '.') {
+                        char n[strlen(dent->d_name) + strlen(tail) + 1];
+
+                        strscpyl(n, sizeof n, dent->d_name, tail, NULL);
+                        if (faccessat(dirfd(dir), n, F_OK, 0) == 0) {
+                                strscpyl(attr, len, path, n, NULL);
+                                break;
+                        }
+                }
+}
+
+static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {
+        char *linepos;
+        char *temp;
+
+        linepos = *line;
+        if (linepos == NULL || linepos[0] == '\0')
+                return -1;
+
+        /* skip whitespace */
+        while (isspace(linepos[0]) || linepos[0] == ',')
+                linepos++;
+
+        /* get the key */
+        if (linepos[0] == '\0')
+                return -1;
+        *key = linepos;
+
+        for (;;) {
+                linepos++;
+                if (linepos[0] == '\0')
+                        return -1;
+                if (isspace(linepos[0]))
+                        break;
+                if (linepos[0] == '=')
+                        break;
+                if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
+                        if (linepos[1] == '=')
+                                break;
+        }
+
+        /* remember end of key */
+        temp = linepos;
+
+        /* skip whitespace after key */
+        while (isspace(linepos[0]))
+                linepos++;
+        if (linepos[0] == '\0')
+                return -1;
+
+        /* get operation type */
+        if (linepos[0] == '=' && linepos[1] == '=') {
+                *op = OP_MATCH;
+                linepos += 2;
+        } else if (linepos[0] == '!' && linepos[1] == '=') {
+                *op = OP_NOMATCH;
+                linepos += 2;
+        } else if (linepos[0] == '+' && linepos[1] == '=') {
+                *op = OP_ADD;
+                linepos += 2;
+        } else if (linepos[0] == '-' && linepos[1] == '=') {
+                *op = OP_REMOVE;
+                linepos += 2;
+        } else if (linepos[0] == '=') {
+                *op = OP_ASSIGN;
+                linepos++;
+        } else if (linepos[0] == ':' && linepos[1] == '=') {
+                *op = OP_ASSIGN_FINAL;
+                linepos += 2;
+        } else
+                return -1;
+
+        /* terminate key */
+        temp[0] = '\0';
+
+        /* skip whitespace after operator */
+        while (isspace(linepos[0]))
+                linepos++;
+        if (linepos[0] == '\0')
+                return -1;
+
+        /* get the value */
+        if (linepos[0] == '"')
+                linepos++;
+        else
+                return -1;
+        *value = linepos;
+
+        /* terminate */
+        temp = strchr(linepos, '"');
+        if (!temp)
+                return -1;
+        temp[0] = '\0';
+        temp++;
+
+        /* move line to next key */
+        *line = temp;
+        return 0;
+}
+
+/* extract possible KEY{attr} */
+static const char *get_key_attribute(struct udev *udev, char *str) {
+        char *pos;
+        char *attr;
+
+        attr = strchr(str, '{');
+        if (attr != NULL) {
+                attr++;
+                pos = strchr(attr, '}');
+                if (pos == NULL) {
+                        log_error("missing closing brace for format");
+                        return NULL;
+                }
+                pos[0] = '\0';
+                return attr;
+        }
+        return NULL;
+}
+
+static void rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
+                         enum operation_type op,
+                         const char *value, const void *data) {
+        struct token *token = rule_tmp->token + rule_tmp->token_cur;
+        const char *attr = NULL;
+
+        assert(rule_tmp->token_cur < ELEMENTSOF(rule_tmp->token));
+        memzero(token, sizeof(struct token));
+
+        switch (type) {
+        case TK_M_ACTION:
+        case TK_M_DEVPATH:
+        case TK_M_KERNEL:
+        case TK_M_SUBSYSTEM:
+        case TK_M_DRIVER:
+        case TK_M_WAITFOR:
+        case TK_M_DEVLINK:
+        case TK_M_NAME:
+        case TK_M_KERNELS:
+        case TK_M_SUBSYSTEMS:
+        case TK_M_DRIVERS:
+        case TK_M_TAGS:
+        case TK_M_PROGRAM:
+        case TK_M_IMPORT_FILE:
+        case TK_M_IMPORT_PROG:
+        case TK_M_IMPORT_DB:
+        case TK_M_IMPORT_CMDLINE:
+        case TK_M_IMPORT_PARENT:
+        case TK_M_RESULT:
+        case TK_A_OWNER:
+        case TK_A_GROUP:
+        case TK_A_MODE:
+        case TK_A_DEVLINK:
+        case TK_A_NAME:
+        case TK_A_GOTO:
+        case TK_M_TAG:
+        case TK_A_TAG:
+        case TK_A_STATIC_NODE:
+                token->key.value_off = rules_add_string(rule_tmp->rules, value);
+                break;
+        case TK_M_IMPORT_BUILTIN:
+                token->key.value_off = rules_add_string(rule_tmp->rules, value);
+                token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
+                break;
+        case TK_M_ENV:
+        case TK_M_ATTR:
+        case TK_M_SYSCTL:
+        case TK_M_ATTRS:
+        case TK_A_ATTR:
+        case TK_A_SYSCTL:
+        case TK_A_ENV:
+        case TK_A_SECLABEL:
+                attr = data;
+                token->key.value_off = rules_add_string(rule_tmp->rules, value);
+                token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
+                break;
+        case TK_M_TEST:
+                token->key.value_off = rules_add_string(rule_tmp->rules, value);
+                if (data != NULL)
+                        token->key.mode = *(mode_t *)data;
+                break;
+        case TK_A_STRING_ESCAPE_NONE:
+        case TK_A_STRING_ESCAPE_REPLACE:
+        case TK_A_DB_PERSIST:
+                break;
+        case TK_A_RUN_BUILTIN:
+        case TK_A_RUN_PROGRAM:
+                token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
+                token->key.value_off = rules_add_string(rule_tmp->rules, value);
+                break;
+        case TK_A_INOTIFY_WATCH:
+        case TK_A_DEVLINK_PRIO:
+                token->key.devlink_prio = *(int *)data;
+                break;
+        case TK_A_OWNER_ID:
+                token->key.uid = *(uid_t *)data;
+                break;
+        case TK_A_GROUP_ID:
+                token->key.gid = *(gid_t *)data;
+                break;
+        case TK_A_MODE_ID:
+                token->key.mode = *(mode_t *)data;
+                break;
+        case TK_RULE:
+        case TK_M_PARENTS_MIN:
+        case TK_M_PARENTS_MAX:
+        case TK_M_MAX:
+        case TK_END:
+        case TK_UNSET:
+                assert_not_reached("wrong type");
+        }
+
+        if (value != NULL && type < TK_M_MAX) {
+                /* check if we need to split or call fnmatch() while matching rules */
+                enum string_glob_type glob;
+                int has_split;
+                int has_glob;
+
+                has_split = (strchr(value, '|') != NULL);
+                has_glob = string_is_glob(value);
+                if (has_split && has_glob) {
+                        glob = GL_SPLIT_GLOB;
+                } else if (has_split) {
+                        glob = GL_SPLIT;
+                } else if (has_glob) {
+                        if (streq(value, "?*"))
+                                glob = GL_SOMETHING;
+                        else
+                                glob = GL_GLOB;
+                } else {
+                        glob = GL_PLAIN;
+                }
+                token->key.glob = glob;
+        }
+
+        if (value != NULL && type > TK_M_MAX) {
+                /* check if assigned value has substitution chars */
+                if (value[0] == '[')
+                        token->key.subst = SB_SUBSYS;
+                else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
+                        token->key.subst = SB_FORMAT;
+                else
+                        token->key.subst = SB_NONE;
+        }
+
+        if (attr != NULL) {
+                /* check if property/attribute name has substitution chars */
+                if (attr[0] == '[')
+                        token->key.attrsubst = SB_SUBSYS;
+                else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
+                        token->key.attrsubst = SB_FORMAT;
+                else
+                        token->key.attrsubst = SB_NONE;
+        }
+
+        token->key.type = type;
+        token->key.op = op;
+        rule_tmp->token_cur++;
+}
+
+static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
+        unsigned int i;
+        unsigned int start = 0;
+        unsigned int end = rule_tmp->token_cur;
+
+        for (i = 0; i < rule_tmp->token_cur; i++) {
+                enum token_type next_val = TK_UNSET;
+                unsigned int next_idx = 0;
+                unsigned int j;
+
+                /* find smallest value */
+                for (j = start; j < end; j++) {
+                        if (rule_tmp->token[j].type == TK_UNSET)
+                                continue;
+                        if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
+                                next_val = rule_tmp->token[j].type;
+                                next_idx = j;
+                        }
+                }
+
+                /* add token and mark done */
+                if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
+                        return -1;
+                rule_tmp->token[next_idx].type = TK_UNSET;
+
+                /* shrink range */
+                if (next_idx == start)
+                        start++;
+                if (next_idx+1 == end)
+                        end--;
+        }
+        return 0;
+}
+
+#define LOG_RULE_ERROR(fmt, ...) log_error("Invalid rule %s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
+#define LOG_RULE_WARNING(fmt, ...) log_warning("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
+#define LOG_RULE_DEBUG(fmt, ...) log_debug("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
+#define LOG_AND_RETURN(fmt, ...) { LOG_RULE_ERROR(fmt, __VA_ARGS__); return; }
+
+static void add_rule(struct udev_rules *rules, char *line,
+                     const char *filename, unsigned int filename_off, unsigned int lineno) {
+        char *linepos;
+        const char *attr;
+        struct rule_tmp rule_tmp = {
+                .rules = rules,
+                .rule.type = TK_RULE,
+        };
+
+        /* the offset in the rule is limited to unsigned short */
+        if (filename_off < USHRT_MAX)
+                rule_tmp.rule.rule.filename_off = filename_off;
+        rule_tmp.rule.rule.filename_line = lineno;
+
+        linepos = line;
+        for (;;) {
+                char *key;
+                char *value;
+                enum operation_type op;
+
+                if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
+                        /* Avoid erroring on trailing whitespace. This is probably rare
+                         * so save the work for the error case instead of always trying
+                         * to strip the trailing whitespace with strstrip(). */
+                        while (isblank(*linepos))
+                                linepos++;
+
+                        /* If we aren't at the end of the line, this is a parsing error.
+                         * Make a best effort to describe where the problem is. */
+                        if (!strchr(NEWLINE, *linepos)) {
+                                char buf[2] = {*linepos};
+                                _cleanup_free_ char *tmp;
+
+                                tmp = cescape(buf);
+                                log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
+                                          filename, lineno, linepos - line + 1, tmp);
+                                if (*linepos == '#')
+                                        log_error("hint: comments can only start at beginning of line");
+                        }
+                        break;
+                }
+
+                if (rule_tmp.token_cur >= ELEMENTSOF(rule_tmp.token))
+                        LOG_AND_RETURN("temporary rule array too small, aborting event processing with %u items", rule_tmp.token_cur);
+
+                if (streq(key, "ACTION")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
+
+                } else if (streq(key, "DEVPATH")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
+
+                } else if (streq(key, "KERNEL")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
+
+                } else if (streq(key, "SUBSYSTEM")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        /* bus, class, subsystem events should all be the same */
+                        if (STR_IN_SET(value, "subsystem", "bus", "class")) {
+                                if (!streq(value, "subsystem"))
+                                        LOG_RULE_WARNING("'%s' must be specified as 'subsystem'; please fix", value);
+
+                                rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
+                        } else
+                                rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
+
+                } else if (streq(key, "DRIVER")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
+
+                } else if (startswith(key, "ATTR{")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
+                        if (attr == NULL)
+                                LOG_AND_RETURN("error parsing %s attribute", "ATTR");
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "ATTR");
+
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
+                        else
+                                rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
+
+                } else if (startswith(key, "SYSCTL{")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("SYSCTL"));
+                        if (attr == NULL)
+                                LOG_AND_RETURN("error parsing %s attribute", "ATTR");
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "ATTR");
+
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_SYSCTL, op, value, attr);
+                        else
+                                rule_add_key(&rule_tmp, TK_A_SYSCTL, op, value, attr);
+
+                } else if (startswith(key, "SECLABEL{")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
+                        if (attr == NULL)
+                                LOG_AND_RETURN("error parsing %s attribute", "SECLABEL");
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "SECLABEL");
+
+                        rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
+
+                } else if (streq(key, "KERNELS")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
+
+                } else if (streq(key, "SUBSYSTEMS")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
+
+                } else if (streq(key, "DRIVERS")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
+
+                } else if (startswith(key, "ATTRS{")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", "ATTRS");
+
+                        attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
+                        if (attr == NULL)
+                                LOG_AND_RETURN("error parsing %s attribute", "ATTRS");
+
+                        if (startswith(attr, "device/"))
+                                LOG_RULE_WARNING("'device' link may not be available in future kernels; please fix");
+                        if (strstr(attr, "../") != NULL)
+                                LOG_RULE_WARNING("direct reference to parent sysfs directory, may break in future kernels; please fix");
+                        rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
+
+                } else if (streq(key, "TAGS")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
+
+                } else if (startswith(key, "ENV{")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("ENV"));
+                        if (attr == NULL)
+                                LOG_AND_RETURN("error parsing %s attribute", "ENV");
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "ENV");
+
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr);
+                        else {
+                                if (STR_IN_SET(attr,
+                                               "ACTION",
+                                               "SUBSYSTEM",
+                                               "DEVTYPE",
+                                               "MAJOR",
+                                               "MINOR",
+                                               "DRIVER",
+                                               "IFINDEX",
+                                               "DEVNAME",
+                                               "DEVLINKS",
+                                               "DEVPATH",
+                                               "TAGS"))
+                                        LOG_AND_RETURN("invalid ENV attribute, '%s' cannot be set", attr);
+
+                                rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr);
+                        }
+
+                } else if (streq(key, "TAG")) {
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
+                        else
+                                rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
+
+                } else if (streq(key, "PROGRAM")) {
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
+
+                } else if (streq(key, "RESULT")) {
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
+
+                } else if (startswith(key, "IMPORT")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
+                        if (attr == NULL) {
+                                LOG_RULE_WARNING("ignoring IMPORT{} with missing type");
+                                continue;
+                        }
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "IMPORT");
+
+                        if (streq(attr, "program")) {
+                                /* find known built-in command */
+                                if (value[0] != '/') {
+                                        const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
+
+                                        if (cmd < UDEV_BUILTIN_MAX) {
+                                                LOG_RULE_DEBUG("IMPORT found builtin '%s', replacing", value);
+                                                rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
+                                                continue;
+                                        }
+                                }
+                                rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
+                        } else if (streq(attr, "builtin")) {
+                                const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
+
+                                if (cmd >= UDEV_BUILTIN_MAX)
+                                        LOG_RULE_WARNING("IMPORT{builtin} '%s' unknown", value);
+                                else
+                                        rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
+                        } else if (streq(attr, "file"))
+                                rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
+                        else if (streq(attr, "db"))
+                                rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
+                        else if (streq(attr, "cmdline"))
+                                rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
+                        else if (streq(attr, "parent"))
+                                rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
+                        else
+                                LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "IMPORT", attr);
+
+                } else if (startswith(key, "TEST")) {
+                        mode_t mode = 0;
+
+                        if (op > OP_MATCH_MAX)
+                                LOG_AND_RETURN("invalid %s operation", "TEST");
+
+                        attr = get_key_attribute(rules->udev, key + strlen("TEST"));
+                        if (attr != NULL) {
+                                mode = strtol(attr, NULL, 8);
+                                rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
+                        } else
+                                rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
+
+                } else if (startswith(key, "RUN")) {
+                        attr = get_key_attribute(rules->udev, key + strlen("RUN"));
+                        if (attr == NULL)
+                                attr = "program";
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", "RUN");
+
+                        if (streq(attr, "builtin")) {
+                                const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
+
+                                if (cmd < UDEV_BUILTIN_MAX)
+                                        rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
+                                else
+                                        LOG_RULE_ERROR("RUN{builtin}: '%s' unknown", value);
+                        } else if (streq(attr, "program")) {
+                                const enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
+
+                                rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
+                        } else
+                                LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "RUN", attr);
+
+                } else if (streq(key, "LABEL")) {
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
+
+                } else if (streq(key, "GOTO")) {
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
+
+                } else if (startswith(key, "NAME")) {
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
+                        else {
+                                if (streq(value, "%k")) {
+                                        LOG_RULE_WARNING("NAME=\"%%k\" is ignored, because it breaks kernel supplied names; please remove");
+                                        continue;
+                                }
+                                if (isempty(value)) {
+                                        LOG_RULE_DEBUG("NAME=\"\" is ignored, because udev will not delete any device nodes; please remove");
+                                        continue;
+                                }
+                                rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
+                        }
+                        rule_tmp.rule.rule.can_set_name = true;
+
+                } else if (streq(key, "SYMLINK")) {
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        if (op < OP_MATCH_MAX)
+                                rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
+                        else
+                                rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
+                        rule_tmp.rule.rule.can_set_name = true;
+
+                } else if (streq(key, "OWNER")) {
+                        uid_t uid;
+                        char *endptr;
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        uid = strtoul(value, &endptr, 10);
+                        if (endptr[0] == '\0')
+                                rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
+                        else if (rules->resolve_names > 0 && strchr("$%", value[0]) == NULL) {
+                                uid = add_uid(rules, value);
+                                rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
+                        } else if (rules->resolve_names >= 0)
+                                rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
+
+                        rule_tmp.rule.rule.can_set_name = true;
+
+                } else if (streq(key, "GROUP")) {
+                        gid_t gid;
+                        char *endptr;
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        gid = strtoul(value, &endptr, 10);
+                        if (endptr[0] == '\0')
+                                rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
+                        else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
+                                gid = add_gid(rules, value);
+                                rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
+                        } else if (rules->resolve_names >= 0)
+                                rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
+
+                        rule_tmp.rule.rule.can_set_name = true;
+
+                } else if (streq(key, "MODE")) {
+                        mode_t mode;
+                        char *endptr;
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        mode = strtol(value, &endptr, 8);
+                        if (endptr[0] == '\0')
+                                rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
+                        else
+                                rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
+                        rule_tmp.rule.rule.can_set_name = true;
+
+                } else if (streq(key, "OPTIONS")) {
+                        const char *pos;
+
+                        if (op == OP_REMOVE)
+                                LOG_AND_RETURN("invalid %s operation", key);
+
+                        pos = strstr(value, "link_priority=");
+                        if (pos != NULL) {
+                                int prio = atoi(pos + strlen("link_priority="));
+
+                                rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
+                        }
+
+                        pos = strstr(value, "string_escape=");
+                        if (pos != NULL) {
+                                pos += strlen("string_escape=");
+                                if (startswith(pos, "none"))
+                                        rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
+                                else if (startswith(pos, "replace"))
+                                        rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
+                        }
+
+                        pos = strstr(value, "db_persist");
+                        if (pos != NULL)
+                                rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
+
+                        pos = strstr(value, "nowatch");
+                        if (pos != NULL) {
+                                const int off = 0;
+
+                                rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
+                        } else {
+                                pos = strstr(value, "watch");
+                                if (pos != NULL) {
+                                        const int on = 1;
+
+                                        rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
+                                }
+                        }
+
+                        pos = strstr(value, "static_node=");
+                        if (pos != NULL) {
+                                pos += strlen("static_node=");
+                                rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, pos, NULL);
+                                rule_tmp.rule.rule.has_static_node = true;
+                        }
+
+                } else
+                        LOG_AND_RETURN("unknown key '%s'", key);
+        }
+
+        /* add rule token and sort tokens */
+        rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
+        if (add_token(rules, &rule_tmp.rule) != 0 || sort_token(rules, &rule_tmp) != 0)
+                LOG_RULE_ERROR("failed to add rule token");
+}
+
+static int parse_file(struct udev_rules *rules, const char *filename) {
+        _cleanup_fclose_ FILE *f = NULL;
+        unsigned int first_token;
+        unsigned int filename_off;
+        char line[UTIL_LINE_SIZE];
+        int line_nr = 0;
+        unsigned int i;
+
+        f = fopen(filename, "re");
+        if (!f) {
+                if (errno == ENOENT)
+                        return 0;
+                else
+                        return -errno;
+        }
+
+        if (null_or_empty_fd(fileno(f))) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        } else
+                log_debug("Reading rules file: %s", filename);
+
+        first_token = rules->token_cur;
+        filename_off = rules_add_string(rules, filename);
+
+        while (fgets(line, sizeof(line), f) != NULL) {
+                char *key;
+                size_t len;
+
+                /* skip whitespace */
+                line_nr++;
+                key = line;
+                while (isspace(key[0]))
+                        key++;
+
+                /* comment */
+                if (key[0] == '#')
+                        continue;
+
+                len = strlen(line);
+                if (len < 3)
+                        continue;
+
+                /* continue reading if backslash+newline is found */
+                while (line[len-2] == '\\') {
+                        if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
+                                break;
+                        if (strlen(&line[len-2]) < 2)
+                                break;
+                        line_nr++;
+                        len = strlen(line);
+                }
+
+                if (len+1 >= sizeof(line)) {
+                        log_error("line too long '%s':%u, ignored", filename, line_nr);
+                        continue;
+                }
+                add_rule(rules, key, filename, filename_off, line_nr);
+        }
+
+        /* link GOTOs to LABEL rules in this file to be able to fast-forward */
+        for (i = first_token+1; i < rules->token_cur; i++) {
+                if (rules->tokens[i].type == TK_A_GOTO) {
+                        char *label = rules_str(rules, rules->tokens[i].key.value_off);
+                        unsigned int j;
+
+                        for (j = i+1; j < rules->token_cur; j++) {
+                                if (rules->tokens[j].type != TK_RULE)
+                                        continue;
+                                if (rules->tokens[j].rule.label_off == 0)
+                                        continue;
+                                if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
+                                        continue;
+                                rules->tokens[i].key.rule_goto = j;
+                                break;
+                        }
+                        if (rules->tokens[i].key.rule_goto == 0)
+                                log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
+                }
+        }
+        return 0;
+}
+
+struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
+        struct udev_rules *rules;
+        struct udev_list file_list;
+        struct token end_token;
+        char **files, **f;
+        int r;
+
+        rules = new0(struct udev_rules, 1);
+        if (rules == NULL)
+                return NULL;
+        rules->udev = udev;
+        rules->resolve_names = resolve_names;
+        udev_list_init(udev, &file_list, true);
+
+        /* init token array and string buffer */
+        rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
+        if (rules->tokens == NULL)
+                return udev_rules_unref(rules);
+        rules->token_max = PREALLOC_TOKEN;
+
+        rules->strbuf = strbuf_new();
+        if (!rules->strbuf)
+                return udev_rules_unref(rules);
+
+        udev_rules_check_timestamp(rules);
+
+        r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
+        if (r < 0) {
+                log_error_errno(r, "failed to enumerate rules files: %m");
+                return udev_rules_unref(rules);
+        }
+
+        /*
+         * The offset value in the rules strct is limited; add all
+         * rules file names to the beginning of the string buffer.
+         */
+        STRV_FOREACH(f, files)
+                rules_add_string(rules, *f);
+
+        STRV_FOREACH(f, files)
+                parse_file(rules, *f);
+
+        strv_free(files);
+
+        memzero(&end_token, sizeof(struct token));
+        end_token.type = TK_END;
+        add_token(rules, &end_token);
+        log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
+                  rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
+
+        /* cleanup temporary strbuf data */
+        log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
+                  rules->strbuf->in_count, rules->strbuf->in_len,
+                  rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
+        strbuf_complete(rules->strbuf);
+
+        /* cleanup uid/gid cache */
+        rules->uids = mfree(rules->uids);
+        rules->uids_cur = 0;
+        rules->uids_max = 0;
+        rules->gids = mfree(rules->gids);
+        rules->gids_cur = 0;
+        rules->gids_max = 0;
+
+        dump_rules(rules);
+        return rules;
+}
+
+struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
+        if (rules == NULL)
+                return NULL;
+        free(rules->tokens);
+        strbuf_cleanup(rules->strbuf);
+        free(rules->uids);
+        free(rules->gids);
+        free(rules);
+        return NULL;
+}
+
+bool udev_rules_check_timestamp(struct udev_rules *rules) {
+        if (!rules)
+                return false;
+
+        return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
+}
+
+static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
+        char *key_value = rules_str(rules, token->key.value_off);
+        char *pos;
+        bool match = false;
+
+        if (val == NULL)
+                val = "";
+
+        switch (token->key.glob) {
+        case GL_PLAIN:
+                match = (streq(key_value, val));
+                break;
+        case GL_GLOB:
+                match = (fnmatch(key_value, val, 0) == 0);
+                break;
+        case GL_SPLIT:
+                {
+                        const char *s;
+                        size_t len;
+
+                        s = rules_str(rules, token->key.value_off);
+                        len = strlen(val);
+                        for (;;) {
+                                const char *next;
+
+                                next = strchr(s, '|');
+                                if (next != NULL) {
+                                        size_t matchlen = (size_t)(next - s);
+
+                                        match = (matchlen == len && strneq(s, val, matchlen));
+                                        if (match)
+                                                break;
+                                } else {
+                                        match = (streq(s, val));
+                                        break;
+                                }
+                                s = &next[1];
+                        }
+                        break;
+                }
+        case GL_SPLIT_GLOB:
+                {
+                        char value[UTIL_PATH_SIZE];
+
+                        strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
+                        key_value = value;
+                        while (key_value != NULL) {
+                                pos = strchr(key_value, '|');
+                                if (pos != NULL) {
+                                        pos[0] = '\0';
+                                        pos = &pos[1];
+                                }
+                                match = (fnmatch(key_value, val, 0) == 0);
+                                if (match)
+                                        break;
+                                key_value = pos;
+                        }
+                        break;
+                }
+        case GL_SOMETHING:
+                match = (val[0] != '\0');
+                break;
+        case GL_UNSET:
+                return -1;
+        }
+
+        if (match && (token->key.op == OP_MATCH))
+                return 0;
+        if (!match && (token->key.op == OP_NOMATCH))
+                return 0;
+        return -1;
+}
+
+static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
+        const char *name;
+        char nbuf[UTIL_NAME_SIZE];
+        const char *value;
+        char vbuf[UTIL_NAME_SIZE];
+        size_t len;
+
+        name = rules_str(rules, cur->key.attr_off);
+        switch (cur->key.attrsubst) {
+        case SB_FORMAT:
+                udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
+                name = nbuf;
+                /* fall through */
+        case SB_NONE:
+                value = udev_device_get_sysattr_value(dev, name);
+                if (value == NULL)
+                        return -1;
+                break;
+        case SB_SUBSYS:
+                if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
+                        return -1;
+                value = vbuf;
+                break;
+        default:
+                return -1;
+        }
+
+        /* remove trailing whitespace, if not asked to match for it */
+        len = strlen(value);
+        if (len > 0 && isspace(value[len-1])) {
+                const char *key_value;
+                size_t klen;
+
+                key_value = rules_str(rules, cur->key.value_off);
+                klen = strlen(key_value);
+                if (klen > 0 && !isspace(key_value[klen-1])) {
+                        if (value != vbuf) {
+                                strscpy(vbuf, sizeof(vbuf), value);
+                                value = vbuf;
+                        }
+                        while (len > 0 && isspace(vbuf[--len]))
+                                vbuf[len] = '\0';
+                }
+        }
+
+        return match_key(rules, cur, value);
+}
+
+enum escape_type {
+        ESCAPE_UNSET,
+        ESCAPE_NONE,
+        ESCAPE_REPLACE,
+};
+
+void udev_rules_apply_to_event(struct udev_rules *rules,
+                               struct udev_event *event,
+                               usec_t timeout_usec,
+                               usec_t timeout_warn_usec,
+                               struct udev_list *properties_list) {
+        struct token *cur;
+        struct token *rule;
+        enum escape_type esc = ESCAPE_UNSET;
+        bool can_set_name;
+
+        if (rules->tokens == NULL)
+                return;
+
+        can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
+                        (major(udev_device_get_devnum(event->dev)) > 0 ||
+                         udev_device_get_ifindex(event->dev) > 0));
+
+        /* loop through token list, match, run actions or forward to next rule */
+        cur = &rules->tokens[0];
+        rule = cur;
+        for (;;) {
+                dump_token(rules, cur);
+                switch (cur->type) {
+                case TK_RULE:
+                        /* current rule */
+                        rule = cur;
+                        /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
+                        if (!can_set_name && rule->rule.can_set_name)
+                                goto nomatch;
+                        esc = ESCAPE_UNSET;
+                        break;
+                case TK_M_ACTION:
+                        if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_DEVPATH:
+                        if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_KERNEL:
+                        if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_DEVLINK: {
+                        struct udev_list_entry *list_entry;
+                        bool match = false;
+
+                        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
+                                const char *devlink;
+
+                                devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
+                                if (match_key(rules, cur, devlink) == 0) {
+                                        match = true;
+                                        break;
+                                }
+                        }
+                        if (!match)
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_NAME:
+                        if (match_key(rules, cur, event->name) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_ENV: {
+                        const char *key_name = rules_str(rules, cur->key.attr_off);
+                        const char *value;
+
+                        value = udev_device_get_property_value(event->dev, key_name);
+
+                        /* check global properties */
+                        if (!value && properties_list) {
+                                struct udev_list_entry *list_entry;
+
+                                list_entry = udev_list_get_entry(properties_list);
+                                list_entry = udev_list_entry_get_by_name(list_entry, key_name);
+                                if (list_entry != NULL)
+                                        value = udev_list_entry_get_value(list_entry);
+                        }
+
+                        if (!value)
+                                value = "";
+                        if (match_key(rules, cur, value))
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_TAG: {
+                        struct udev_list_entry *list_entry;
+                        bool match = false;
+
+                        udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
+                                if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
+                                        match = true;
+                                        break;
+                                }
+                        }
+                        if ((!match && (cur->key.op != OP_NOMATCH)) ||
+                            (match && (cur->key.op == OP_NOMATCH)))
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_SUBSYSTEM:
+                        if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_DRIVER:
+                        if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_ATTR:
+                        if (match_attr(rules, event->dev, event, cur) != 0)
+                                goto nomatch;
+                        break;
+                case TK_M_SYSCTL: {
+                        char filename[UTIL_PATH_SIZE];
+                        _cleanup_free_ char *value = NULL;
+                        size_t len;
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
+                        sysctl_normalize(filename);
+                        if (sysctl_read(filename, &value) < 0)
+                                goto nomatch;
+
+                        len = strlen(value);
+                        while (len > 0 && isspace(value[--len]))
+                                value[len] = '\0';
+                        if (match_key(rules, cur, value) != 0)
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_KERNELS:
+                case TK_M_SUBSYSTEMS:
+                case TK_M_DRIVERS:
+                case TK_M_ATTRS:
+                case TK_M_TAGS: {
+                        struct token *next;
+
+                        /* get whole sequence of parent matches */
+                        next = cur;
+                        while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
+                                next++;
+
+                        /* loop over parents */
+                        event->dev_parent = event->dev;
+                        for (;;) {
+                                struct token *key;
+
+                                /* loop over sequence of parent match keys */
+                                for (key = cur; key < next; key++ ) {
+                                        dump_token(rules, key);
+                                        switch(key->type) {
+                                        case TK_M_KERNELS:
+                                                if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
+                                                        goto try_parent;
+                                                break;
+                                        case TK_M_SUBSYSTEMS:
+                                                if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
+                                                        goto try_parent;
+                                                break;
+                                        case TK_M_DRIVERS:
+                                                if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
+                                                        goto try_parent;
+                                                break;
+                                        case TK_M_ATTRS:
+                                                if (match_attr(rules, event->dev_parent, event, key) != 0)
+                                                        goto try_parent;
+                                                break;
+                                        case TK_M_TAGS: {
+                                                bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
+
+                                                if (match && key->key.op == OP_NOMATCH)
+                                                        goto try_parent;
+                                                if (!match && key->key.op == OP_MATCH)
+                                                        goto try_parent;
+                                                break;
+                                        }
+                                        default:
+                                                goto nomatch;
+                                        }
+                                }
+                                break;
+
+                        try_parent:
+                                event->dev_parent = udev_device_get_parent(event->dev_parent);
+                                if (event->dev_parent == NULL)
+                                        goto nomatch;
+                        }
+                        /* move behind our sequence of parent match keys */
+                        cur = next;
+                        continue;
+                }
+                case TK_M_TEST: {
+                        char filename[UTIL_PATH_SIZE];
+                        struct stat statbuf;
+                        int match;
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
+                        if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
+                                if (filename[0] != '/') {
+                                        char tmp[UTIL_PATH_SIZE];
+
+                                        strscpy(tmp, sizeof(tmp), filename);
+                                        strscpyl(filename, sizeof(filename),
+                                                      udev_device_get_syspath(event->dev), "/", tmp, NULL);
+                                }
+                        }
+                        attr_subst_subdir(filename, sizeof(filename));
+
+                        match = (stat(filename, &statbuf) == 0);
+                        if (match && cur->key.mode > 0)
+                                match = ((statbuf.st_mode & cur->key.mode) > 0);
+                        if (match && cur->key.op == OP_NOMATCH)
+                                goto nomatch;
+                        if (!match && cur->key.op == OP_MATCH)
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_PROGRAM: {
+                        char program[UTIL_PATH_SIZE];
+                        char result[UTIL_LINE_SIZE];
+
+                        event->program_result = mfree(event->program_result);
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
+                        log_debug("PROGRAM '%s' %s:%u",
+                                  program,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+
+                        if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result)) < 0) {
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        } else {
+                                int count;
+
+                                util_remove_trailing_chars(result, '\n');
+                                if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
+                                        count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
+                                        if (count > 0)
+                                                log_debug("%i character(s) replaced" , count);
+                                }
+                                event->program_result = strdup(result);
+                                if (cur->key.op == OP_NOMATCH)
+                                        goto nomatch;
+                        }
+                        break;
+                }
+                case TK_M_IMPORT_FILE: {
+                        char import[UTIL_PATH_SIZE];
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
+                        if (import_file_into_properties(event->dev, import) != 0)
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        break;
+                }
+                case TK_M_IMPORT_PROG: {
+                        char import[UTIL_PATH_SIZE];
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
+                        log_debug("IMPORT '%s' %s:%u",
+                                  import,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+
+                        if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import) != 0)
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        break;
+                }
+                case TK_M_IMPORT_BUILTIN: {
+                        char command[UTIL_PATH_SIZE];
+
+                        if (udev_builtin_run_once(cur->key.builtin_cmd)) {
+                                /* check if we ran already */
+                                if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
+                                        log_debug("IMPORT builtin skip '%s' %s:%u",
+                                                  udev_builtin_name(cur->key.builtin_cmd),
+                                                  rules_str(rules, rule->rule.filename_off),
+                                                  rule->rule.filename_line);
+                                        /* return the result from earlier run */
+                                        if (event->builtin_ret & (1 << cur->key.builtin_cmd))
+                                                if (cur->key.op != OP_NOMATCH)
+                                                        goto nomatch;
+                                        break;
+                                }
+                                /* mark as ran */
+                                event->builtin_run |= (1 << cur->key.builtin_cmd);
+                        }
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
+                        log_debug("IMPORT builtin '%s' %s:%u",
+                                  udev_builtin_name(cur->key.builtin_cmd),
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+
+                        if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
+                                /* remember failure */
+                                log_debug("IMPORT builtin '%s' returned non-zero",
+                                          udev_builtin_name(cur->key.builtin_cmd));
+                                event->builtin_ret |= (1 << cur->key.builtin_cmd);
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        }
+                        break;
+                }
+                case TK_M_IMPORT_DB: {
+                        const char *key = rules_str(rules, cur->key.value_off);
+                        const char *value;
+
+                        value = udev_device_get_property_value(event->dev_db, key);
+                        if (value != NULL)
+                                udev_device_add_property(event->dev, key, value);
+                        else {
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        }
+                        break;
+                }
+                case TK_M_IMPORT_CMDLINE: {
+                        _cleanup_fclose_ FILE *f = NULL;
+                        bool imported = false;
+
+                        f = fopen("/proc/cmdline", "re");
+                        if (f != NULL) {
+                                char cmdline[4096];
+
+                                if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
+                                        const char *key = rules_str(rules, cur->key.value_off);
+                                        char *pos;
+
+                                        pos = strstr(cmdline, key);
+                                        if (pos != NULL) {
+                                                imported = true;
+                                                pos += strlen(key);
+                                                if (pos[0] == '\0' || isspace(pos[0]))
+                                                        /* we import simple flags as 'FLAG=1' */
+                                                        udev_device_add_property(event->dev, key, "1");
+                                                else if (pos[0] == '=') {
+                                                        const char *value;
+
+                                                        pos++;
+                                                        value = pos;
+                                                        while (pos[0] != '\0' && !isspace(pos[0]))
+                                                                pos++;
+                                                        pos[0] = '\0';
+                                                        udev_device_add_property(event->dev, key, value);
+                                                }
+                                        }
+                                }
+                        }
+                        if (!imported && cur->key.op != OP_NOMATCH)
+                                goto nomatch;
+                        break;
+                }
+                case TK_M_IMPORT_PARENT: {
+                        char import[UTIL_PATH_SIZE];
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
+                        if (import_parent_into_properties(event->dev, import) != 0)
+                                if (cur->key.op != OP_NOMATCH)
+                                        goto nomatch;
+                        break;
+                }
+                case TK_M_RESULT:
+                        if (match_key(rules, cur, event->program_result) != 0)
+                                goto nomatch;
+                        break;
+                case TK_A_STRING_ESCAPE_NONE:
+                        esc = ESCAPE_NONE;
+                        break;
+                case TK_A_STRING_ESCAPE_REPLACE:
+                        esc = ESCAPE_REPLACE;
+                        break;
+                case TK_A_DB_PERSIST:
+                        udev_device_set_db_persist(event->dev);
+                        break;
+                case TK_A_INOTIFY_WATCH:
+                        if (event->inotify_watch_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->inotify_watch_final = true;
+                        event->inotify_watch = cur->key.watch;
+                        break;
+                case TK_A_DEVLINK_PRIO:
+                        udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
+                        break;
+                case TK_A_OWNER: {
+                        char owner[UTIL_NAME_SIZE];
+                        const char *ow = owner;
+                        int r;
+
+                        if (event->owner_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->owner_final = true;
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
+                        event->owner_set = true;
+                        r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
+                        if (r < 0) {
+                                if (r == -ENOENT || r == -ESRCH)
+                                        log_error("specified user '%s' unknown", owner);
+                                else
+                                        log_error_errno(r, "error resolving user '%s': %m", owner);
+
+                                event->uid = 0;
+                        }
+                        log_debug("OWNER %u %s:%u",
+                                  event->uid,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                }
+                case TK_A_GROUP: {
+                        char group[UTIL_NAME_SIZE];
+                        const char *gr = group;
+                        int r;
+
+                        if (event->group_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->group_final = true;
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
+                        event->group_set = true;
+                        r = get_group_creds(&gr, &event->gid);
+                        if (r < 0) {
+                                if (r == -ENOENT || r == -ESRCH)
+                                        log_error("specified group '%s' unknown", group);
+                                else
+                                        log_error_errno(r, "error resolving group '%s': %m", group);
+
+                                event->gid = 0;
+                        }
+                        log_debug("GROUP %u %s:%u",
+                                  event->gid,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                }
+                case TK_A_MODE: {
+                        char mode_str[UTIL_NAME_SIZE];
+                        mode_t mode;
+                        char *endptr;
+
+                        if (event->mode_final)
+                                break;
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
+                        mode = strtol(mode_str, &endptr, 8);
+                        if (endptr[0] != '\0') {
+                                log_error("ignoring invalid mode '%s'", mode_str);
+                                break;
+                        }
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->mode_final = true;
+                        event->mode_set = true;
+                        event->mode = mode;
+                        log_debug("MODE %#o %s:%u",
+                                  event->mode,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                }
+                case TK_A_OWNER_ID:
+                        if (event->owner_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->owner_final = true;
+                        event->owner_set = true;
+                        event->uid = cur->key.uid;
+                        log_debug("OWNER %u %s:%u",
+                                  event->uid,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                case TK_A_GROUP_ID:
+                        if (event->group_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->group_final = true;
+                        event->group_set = true;
+                        event->gid = cur->key.gid;
+                        log_debug("GROUP %u %s:%u",
+                                  event->gid,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                case TK_A_MODE_ID:
+                        if (event->mode_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->mode_final = true;
+                        event->mode_set = true;
+                        event->mode = cur->key.mode;
+                        log_debug("MODE %#o %s:%u",
+                                  event->mode,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                case TK_A_SECLABEL: {
+                        const char *name, *label;
+
+                        name = rules_str(rules, cur->key.attr_off);
+                        label = rules_str(rules, cur->key.value_off);
+                        if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
+                                udev_list_cleanup(&event->seclabel_list);
+                        udev_list_entry_add(&event->seclabel_list, name, label);
+                        log_debug("SECLABEL{%s}='%s' %s:%u",
+                                  name, label,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                }
+                case TK_A_ENV: {
+                        const char *name = rules_str(rules, cur->key.attr_off);
+                        char *value = rules_str(rules, cur->key.value_off);
+                        char value_new[UTIL_NAME_SIZE];
+                        const char *value_old = NULL;
+
+                        if (value[0] == '\0') {
+                                if (cur->key.op == OP_ADD)
+                                        break;
+                                udev_device_add_property(event->dev, name, NULL);
+                                break;
+                        }
+
+                        if (cur->key.op == OP_ADD)
+                                value_old = udev_device_get_property_value(event->dev, name);
+                        if (value_old) {
+                                char temp[UTIL_NAME_SIZE];
+
+                                /* append value separated by space */
+                                udev_event_apply_format(event, value, temp, sizeof(temp));
+                                strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
+                        } else
+                                udev_event_apply_format(event, value, value_new, sizeof(value_new));
+
+                        udev_device_add_property(event->dev, name, value_new);
+                        break;
+                }
+                case TK_A_TAG: {
+                        char tag[UTIL_PATH_SIZE];
+                        const char *p;
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
+                        if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
+                                udev_device_cleanup_tags_list(event->dev);
+                        for (p = tag; *p != '\0'; p++) {
+                                if ((*p >= 'a' && *p <= 'z') ||
+                                    (*p >= 'A' && *p <= 'Z') ||
+                                    (*p >= '0' && *p <= '9') ||
+                                    *p == '-' || *p == '_')
+                                        continue;
+                                log_error("ignoring invalid tag name '%s'", tag);
+                                break;
+                        }
+                        if (cur->key.op == OP_REMOVE)
+                                udev_device_remove_tag(event->dev, tag);
+                        else
+                                udev_device_add_tag(event->dev, tag);
+                        break;
+                }
+                case TK_A_NAME: {
+                        const char *name  = rules_str(rules, cur->key.value_off);
+
+                        char name_str[UTIL_PATH_SIZE];
+                        int count;
+
+                        if (event->name_final)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->name_final = true;
+                        udev_event_apply_format(event, name, name_str, sizeof(name_str));
+                        if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
+                                count = util_replace_chars(name_str, "/");
+                                if (count > 0)
+                                        log_debug("%i character(s) replaced", count);
+                        }
+                        if (major(udev_device_get_devnum(event->dev)) &&
+                            !streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/"))) {
+                                log_error("NAME=\"%s\" ignored, kernel device nodes cannot be renamed; please fix it in %s:%u\n",
+                                          name,
+                                          rules_str(rules, rule->rule.filename_off),
+                                          rule->rule.filename_line);
+                                break;
+                        }
+                        if (free_and_strdup(&event->name, name_str) < 0) {
+                                log_oom();
+                                return;
+                        }
+                        log_debug("NAME '%s' %s:%u",
+                                  event->name,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        break;
+                }
+                case TK_A_DEVLINK: {
+                        char temp[UTIL_PATH_SIZE];
+                        char filename[UTIL_PATH_SIZE];
+                        char *pos, *next;
+                        int count = 0;
+
+                        if (event->devlink_final)
+                                break;
+                        if (major(udev_device_get_devnum(event->dev)) == 0)
+                                break;
+                        if (cur->key.op == OP_ASSIGN_FINAL)
+                                event->devlink_final = true;
+                        if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
+                                udev_device_cleanup_devlinks_list(event->dev);
+
+                        /* allow  multiple symlinks separated by spaces */
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
+                        if (esc == ESCAPE_UNSET)
+                                count = util_replace_chars(temp, "/ ");
+                        else if (esc == ESCAPE_REPLACE)
+                                count = util_replace_chars(temp, "/");
+                        if (count > 0)
+                                log_debug("%i character(s) replaced" , count);
+                        pos = temp;
+                        while (isspace(pos[0]))
+                                pos++;
+                        next = strchr(pos, ' ');
+                        while (next != NULL) {
+                                next[0] = '\0';
+                                log_debug("LINK '%s' %s:%u", pos,
+                                          rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
+                                strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
+                                udev_device_add_devlink(event->dev, filename);
+                                while (isspace(next[1]))
+                                        next++;
+                                pos = &next[1];
+                                next = strchr(pos, ' ');
+                        }
+                        if (pos[0] != '\0') {
+                                log_debug("LINK '%s' %s:%u", pos,
+                                          rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
+                                strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
+                                udev_device_add_devlink(event->dev, filename);
+                        }
+                        break;
+                }
+                case TK_A_ATTR: {
+                        const char *key_name = rules_str(rules, cur->key.attr_off);
+                        char attr[UTIL_PATH_SIZE];
+                        char value[UTIL_NAME_SIZE];
+                        _cleanup_fclose_ FILE *f = NULL;
+
+                        if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
+                                strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
+                        attr_subst_subdir(attr, sizeof(attr));
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
+                        log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        f = fopen(attr, "we");
+                        if (f == NULL)
+                                log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
+                        else if (fprintf(f, "%s", value) <= 0)
+                                log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
+                        break;
+                }
+                case TK_A_SYSCTL: {
+                        char filename[UTIL_PATH_SIZE];
+                        char value[UTIL_NAME_SIZE];
+                        int r;
+
+                        udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
+                        sysctl_normalize(filename);
+                        udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
+                        log_debug("SYSCTL '%s' writing '%s' %s:%u", filename, value,
+                                  rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
+                        r = sysctl_write(filename, value);
+                        if (r < 0)
+                                log_error_errno(r, "error writing SYSCTL{%s}='%s': %m", filename, value);
+                        break;
+                }
+                case TK_A_RUN_BUILTIN:
+                case TK_A_RUN_PROGRAM: {
+                        struct udev_list_entry *entry;
+
+                        if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
+                                udev_list_cleanup(&event->run_list);
+                        log_debug("RUN '%s' %s:%u",
+                                  rules_str(rules, cur->key.value_off),
+                                  rules_str(rules, rule->rule.filename_off),
+                                  rule->rule.filename_line);
+                        entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
+                        udev_list_entry_set_num(entry, cur->key.builtin_cmd);
+                        break;
+                }
+                case TK_A_GOTO:
+                        if (cur->key.rule_goto == 0)
+                                break;
+                        cur = &rules->tokens[cur->key.rule_goto];
+                        continue;
+                case TK_END:
+                        return;
+
+                case TK_M_PARENTS_MIN:
+                case TK_M_PARENTS_MAX:
+                case TK_M_MAX:
+                case TK_UNSET:
+                        log_error("wrong type %u", cur->type);
+                        goto nomatch;
+                }
+
+                cur++;
+                continue;
+        nomatch:
+                /* fast-forward to next rule */
+                cur = rule + rule->rule.token_count;
+        }
+}
+
+int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
+        struct token *cur;
+        struct token *rule;
+        uid_t uid = 0;
+        gid_t gid = 0;
+        mode_t mode = 0;
+        _cleanup_strv_free_ char **tags = NULL;
+        char **t;
+        FILE *f = NULL;
+        _cleanup_free_ char *path = NULL;
+        int r;
+
+        if (rules->tokens == NULL)
+                return 0;
+
+        cur = &rules->tokens[0];
+        rule = cur;
+        for (;;) {
+                switch (cur->type) {
+                case TK_RULE:
+                        /* current rule */
+                        rule = cur;
+
+                        /* skip rules without a static_node tag */
+                        if (!rule->rule.has_static_node)
+                                goto next;
+
+                        uid = 0;
+                        gid = 0;
+                        mode = 0;
+                        tags = strv_free(tags);
+                        break;
+                case TK_A_OWNER_ID:
+                        uid = cur->key.uid;
+                        break;
+                case TK_A_GROUP_ID:
+                        gid = cur->key.gid;
+                        break;
+                case TK_A_MODE_ID:
+                        mode = cur->key.mode;
+                        break;
+                case TK_A_TAG:
+                        r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
+                        if (r < 0)
+                                goto finish;
+
+                        break;
+                case TK_A_STATIC_NODE: {
+                        char device_node[UTIL_PATH_SIZE];
+                        char tags_dir[UTIL_PATH_SIZE];
+                        char tag_symlink[UTIL_PATH_SIZE];
+                        struct stat stats;
+
+                        /* we assure, that the permissions tokens are sorted before the static token */
+
+                        if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
+                                goto next;
+
+                        strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
+                        if (stat(device_node, &stats) != 0)
+                                break;
+                        if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
+                                break;
+
+                        /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
+                        if (tags) {
+                                STRV_FOREACH(t, tags) {
+                                        _cleanup_free_ char *unescaped_filename = NULL;
+
+                                        strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
+                                        r = mkdir_p(tags_dir, 0755);
+                                        if (r < 0)
+                                                return log_error_errno(r, "failed to create %s: %m", tags_dir);
+
+                                        unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
+
+                                        strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
+                                        r = symlink(device_node, tag_symlink);
+                                        if (r < 0 && errno != EEXIST)
+                                                return log_error_errno(errno, "failed to create symlink %s -> %s: %m",
+                                                                       tag_symlink, device_node);
+                                }
+                        }
+
+                        /* don't touch the permissions if only the tags were set */
+                        if (mode == 0 && uid == 0 && gid == 0)
+                                break;
+
+                        if (mode == 0) {
+                                if (gid > 0)
+                                        mode = 0660;
+                                else
+                                        mode = 0600;
+                        }
+                        if (mode != (stats.st_mode & 01777)) {
+                                r = chmod(device_node, mode);
+                                if (r < 0) {
+                                        log_error("failed to chmod '%s' %#o", device_node, mode);
+                                        return -errno;
+                                } else
+                                        log_debug("chmod '%s' %#o", device_node, mode);
+                        }
+
+                        if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
+                                r = chown(device_node, uid, gid);
+                                if (r < 0) {
+                                        log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
+                                        return -errno;
+                                } else
+                                        log_debug("chown '%s' %u %u", device_node, uid, gid);
+                        }
+
+                        utimensat(AT_FDCWD, device_node, NULL, 0);
+                        break;
+                }
+                case TK_END:
+                        goto finish;
+                }
+
+                cur++;
+                continue;
+next:
+                /* fast-forward to next rule */
+                cur = rule + rule->rule.token_count;
+                continue;
+        }
+
+finish:
+        if (f) {
+                fflush(f);
+                fchmod(fileno(f), 0644);
+                if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
+                        unlink_noerrno("/run/udev/static_node-tags");
+                        unlink_noerrno(path);
+                        return -errno;
+                }
+        }
+
+        return 0;
+}
diff --git a/src/grp-udev/libudev-core/udev-watch.c b/src/grp-udev/libudev-core/udev-watch.c
new file mode 100644
index 0000000000..9ce5e975de
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-watch.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+
+#include "stdio-util.h"
+#include "udev.h"
+
+static int inotify_fd = -1;
+
+/* inotify descriptor, will be shared with rules directory;
+ * set to cloexec since we need our children to be able to add
+ * watches for us
+ */
+int udev_watch_init(struct udev *udev) {
+        inotify_fd = inotify_init1(IN_CLOEXEC);
+        if (inotify_fd < 0)
+                log_error_errno(errno, "inotify_init failed: %m");
+        return inotify_fd;
+}
+
+/* move any old watches directory out of the way, and then restore
+ * the watches
+ */
+void udev_watch_restore(struct udev *udev) {
+        if (inotify_fd < 0)
+                return;
+
+        if (rename("/run/udev/watch", "/run/udev/watch.old") == 0) {
+                DIR *dir;
+                struct dirent *ent;
+
+                dir = opendir("/run/udev/watch.old");
+                if (dir == NULL) {
+                        log_error_errno(errno, "unable to open old watches dir /run/udev/watch.old; old watches will not be restored: %m");
+                        return;
+                }
+
+                for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) {
+                        char device[UTIL_PATH_SIZE];
+                        ssize_t len;
+                        struct udev_device *dev;
+
+                        if (ent->d_name[0] == '.')
+                                continue;
+
+                        len = readlinkat(dirfd(dir), ent->d_name, device, sizeof(device));
+                        if (len <= 0 || len == (ssize_t)sizeof(device))
+                                goto unlink;
+                        device[len] = '\0';
+
+                        dev = udev_device_new_from_device_id(udev, device);
+                        if (dev == NULL)
+                                goto unlink;
+
+                        log_debug("restoring old watch on '%s'", udev_device_get_devnode(dev));
+                        udev_watch_begin(udev, dev);
+                        udev_device_unref(dev);
+unlink:
+                        unlinkat(dirfd(dir), ent->d_name, 0);
+                }
+
+                closedir(dir);
+                rmdir("/run/udev/watch.old");
+
+        } else if (errno != ENOENT)
+                log_error_errno(errno, "unable to move watches dir /run/udev/watch; old watches will not be restored: %m");
+}
+
+void udev_watch_begin(struct udev *udev, struct udev_device *dev) {
+        char filename[UTIL_PATH_SIZE];
+        int wd;
+        int r;
+
+        if (inotify_fd < 0)
+                return;
+
+        log_debug("adding watch on '%s'", udev_device_get_devnode(dev));
+        wd = inotify_add_watch(inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
+        if (wd < 0) {
+                log_error_errno(errno, "inotify_add_watch(%d, %s, %o) failed: %m",
+                                inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
+                return;
+        }
+
+        xsprintf(filename, "/run/udev/watch/%d", wd);
+        mkdir_parents(filename, 0755);
+        unlink(filename);
+        r = symlink(udev_device_get_id_filename(dev), filename);
+        if (r < 0)
+                log_error_errno(errno, "Failed to create symlink %s: %m", filename);
+
+        udev_device_set_watch_handle(dev, wd);
+}
+
+void udev_watch_end(struct udev *udev, struct udev_device *dev) {
+        int wd;
+        char filename[UTIL_PATH_SIZE];
+
+        if (inotify_fd < 0)
+                return;
+
+        wd = udev_device_get_watch_handle(dev);
+        if (wd < 0)
+                return;
+
+        log_debug("removing watch on '%s'", udev_device_get_devnode(dev));
+        inotify_rm_watch(inotify_fd, wd);
+
+        xsprintf(filename, "/run/udev/watch/%d", wd);
+        unlink(filename);
+
+        udev_device_set_watch_handle(dev, -1);
+}
+
+struct udev_device *udev_watch_lookup(struct udev *udev, int wd) {
+        char filename[UTIL_PATH_SIZE];
+        char device[UTIL_NAME_SIZE];
+        ssize_t len;
+
+        if (inotify_fd < 0 || wd < 0)
+                return NULL;
+
+        xsprintf(filename, "/run/udev/watch/%d", wd);
+        len = readlink(filename, device, sizeof(device));
+        if (len <= 0 || (size_t)len == sizeof(device))
+                return NULL;
+        device[len] = '\0';
+
+        return udev_device_new_from_device_id(udev, device);
+}
diff --git a/src/grp-udev/libudev-core/udev.conf b/src/grp-udev/libudev-core/udev.conf
new file mode 100644
index 0000000000..47d1433002
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev.conf
@@ -0,0 +1,3 @@
+# see udev.conf(5) for details
+
+#udev_log="info"
diff --git a/src/grp-udev/libudev-core/udev.pc.in b/src/grp-udev/libudev-core/udev.pc.in
new file mode 100644
index 0000000000..a0c2e82d47
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev.pc.in
@@ -0,0 +1,5 @@
+Name: udev
+Description: udev
+Version: @VERSION@
+
+udevdir=@udevlibexecdir@
diff --git a/src/grp-udev/mtd_probe/Makefile b/src/grp-udev/mtd_probe/Makefile
new file mode 100644
index 0000000000..d7392a8a3b
--- /dev/null
+++ b/src/grp-udev/mtd_probe/Makefile
@@ -0,0 +1,37 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+mtd_probe_SOURCES =  \
+	src/udev/mtd_probe/mtd_probe.c \
+	src/udev/mtd_probe/mtd_probe.h \
+	src/udev/mtd_probe/probe_smartmedia.c
+
+dist_udevrules_DATA += \
+	rules/75-probe_mtd.rules
+
+udevlibexec_PROGRAMS += \
+	mtd_probe
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/mtd_probe/mtd_probe.c b/src/grp-udev/mtd_probe/mtd_probe.c
new file mode 100644
index 0000000000..462fab7623
--- /dev/null
+++ b/src/grp-udev/mtd_probe/mtd_probe.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2010 - Maxim Levitsky
+ *
+ * mtd_probe is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mtd_probe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with mtd_probe; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#include <fcntl.h>
+#include <mtd/mtd-user.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "mtd_probe.h"
+
+int main(int argc, char** argv)
+{
+        int mtd_fd;
+        int error;
+        mtd_info_t mtd_info;
+
+        if (argc != 2) {
+                printf("usage: mtd_probe /dev/mtd[n]\n");
+                return 1;
+        }
+
+        mtd_fd = open(argv[1], O_RDONLY|O_CLOEXEC);
+        if (mtd_fd == -1) {
+                perror("open");
+                exit(-1);
+        }
+
+        error = ioctl(mtd_fd, MEMGETINFO, &mtd_info);
+        if (error == -1) {
+                perror("ioctl");
+                exit(-1);
+        }
+
+        probe_smart_media(mtd_fd, &mtd_info);
+        return -1;
+}
diff --git a/src/grp-udev/mtd_probe/mtd_probe.h b/src/grp-udev/mtd_probe/mtd_probe.h
new file mode 100644
index 0000000000..68e4954537
--- /dev/null
+++ b/src/grp-udev/mtd_probe/mtd_probe.h
@@ -0,0 +1,51 @@
+#pragma once
+
+/*
+ * Copyright (C) 2010 - Maxim Levitsky
+ *
+ * mtd_probe is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mtd_probe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with mtd_probe; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#include <mtd/mtd-user.h>
+
+#include "macro.h"
+
+/* Full oob structure as written on the flash */
+struct sm_oob {
+        uint32_t reserved;
+        uint8_t data_status;
+        uint8_t block_status;
+        uint8_t lba_copy1[2];
+        uint8_t ecc2[3];
+        uint8_t lba_copy2[2];
+        uint8_t ecc1[3];
+} _packed_;
+
+/* one sector is always 512 bytes, but it can consist of two nand pages */
+#define SM_SECTOR_SIZE                512
+
+/* oob area is also 16 bytes, but might be from two pages */
+#define SM_OOB_SIZE                16
+
+/* This is maximum zone size, and all devices that have more that one zone
+   have this size */
+#define SM_MAX_ZONE_SIZE         1024
+
+/* support for small page nand */
+#define SM_SMALL_PAGE                 256
+#define SM_SMALL_OOB_SIZE        8
+
+void probe_smart_media(int mtd_fd, mtd_info_t *info);
diff --git a/src/grp-udev/mtd_probe/probe_smartmedia.c b/src/grp-udev/mtd_probe/probe_smartmedia.c
new file mode 100644
index 0000000000..2a7ba17637
--- /dev/null
+++ b/src/grp-udev/mtd_probe/probe_smartmedia.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2010 - Maxim Levitsky
+ *
+ * mtd_probe is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mtd_probe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with mtd_probe; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#include <fcntl.h>
+#include <mtd/mtd-user.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "mtd_probe.h"
+
+static const uint8_t cis_signature[] = {
+        0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20
+};
+
+
+void probe_smart_media(int mtd_fd, mtd_info_t* info)
+{
+        int sector_size;
+        int block_size;
+        int size_in_megs;
+        int spare_count;
+        char* cis_buffer = malloc(SM_SECTOR_SIZE);
+        int offset;
+        int cis_found = 0;
+
+        if (!cis_buffer)
+                return;
+
+        if (info->type != MTD_NANDFLASH)
+                goto exit;
+
+        sector_size = info->writesize;
+        block_size = info->erasesize;
+        size_in_megs = info->size / (1024 * 1024);
+
+        if (sector_size != SM_SECTOR_SIZE && sector_size != SM_SMALL_PAGE)
+                goto exit;
+
+        switch(size_in_megs) {
+        case 1:
+        case 2:
+                spare_count = 6;
+                break;
+        case 4:
+                spare_count = 12;
+                break;
+        default:
+                spare_count = 24;
+                break;
+        }
+
+        for (offset = 0 ; offset < block_size * spare_count ;
+                                                offset += sector_size) {
+                lseek(mtd_fd, SEEK_SET, offset);
+                if (read(mtd_fd, cis_buffer, SM_SECTOR_SIZE) == SM_SECTOR_SIZE) {
+                        cis_found = 1;
+                        break;
+                }
+        }
+
+        if (!cis_found)
+                goto exit;
+
+        if (memcmp(cis_buffer, cis_signature, sizeof(cis_signature)) != 0 &&
+                (memcmp(cis_buffer + SM_SMALL_PAGE, cis_signature,
+                        sizeof(cis_signature)) != 0))
+                goto exit;
+
+        printf("MTD_FTL=smartmedia\n");
+        free(cis_buffer);
+        exit(0);
+exit:
+        free(cis_buffer);
+        return;
+}
diff --git a/src/grp-udev/scsi_id/.gitignore b/src/grp-udev/scsi_id/.gitignore
new file mode 100644
index 0000000000..6aebddd809
--- /dev/null
+++ b/src/grp-udev/scsi_id/.gitignore
@@ -0,0 +1 @@
+scsi_id_version.h
diff --git a/src/grp-udev/scsi_id/Makefile b/src/grp-udev/scsi_id/Makefile
new file mode 100644
index 0000000000..7064a864f7
--- /dev/null
+++ b/src/grp-udev/scsi_id/Makefile
@@ -0,0 +1,41 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+scsi_id_SOURCES =\
+	src/udev/scsi_id/scsi_id.c \
+	src/udev/scsi_id/scsi_serial.c \
+	src/udev/scsi_id/scsi.h \
+	src/udev/scsi_id/scsi_id.h
+
+scsi_id_LDADD = \
+	libshared.la
+
+udevlibexec_PROGRAMS += \
+	scsi_id
+
+EXTRA_DIST += \
+	src/udev/scsi_id/README
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/scsi_id/README b/src/grp-udev/scsi_id/README
new file mode 100644
index 0000000000..9cfe73991c
--- /dev/null
+++ b/src/grp-udev/scsi_id/README
@@ -0,0 +1,4 @@
+scsi_id - generate a SCSI unique identifier for a given SCSI device
+
+Please send questions, comments or patches to <patmans@us.ibm.com> or
+<linux-hotplug-devel@lists.sourceforge.net>.
diff --git a/src/grp-udev/scsi_id/scsi.h b/src/grp-udev/scsi_id/scsi.h
new file mode 100644
index 0000000000..a27a84a40a
--- /dev/null
+++ b/src/grp-udev/scsi_id/scsi.h
@@ -0,0 +1,99 @@
+#pragma once
+
+/*
+ * scsi.h
+ *
+ * General scsi and linux scsi specific defines and structs.
+ *
+ * Copyright (C) IBM Corp. 2003
+ *
+ *        This program is free software; you can redistribute it and/or modify it
+ *        under the terms of the GNU General Public License as published by the
+ *        Free Software Foundation version 2 of the License.
+ */
+
+#include <scsi/scsi.h>
+
+struct scsi_ioctl_command {
+        unsigned int inlen;        /* excluding scsi command length */
+        unsigned int outlen;
+        unsigned char data[1];
+        /* on input, scsi command starts here then opt. data */
+};
+
+/*
+ * Default 5 second timeout
+ */
+#define DEF_TIMEOUT 5000
+
+#define SENSE_BUFF_LEN 32
+
+/*
+ * The request buffer size passed to the SCSI INQUIRY commands, use 254,
+ * as this is a nice value for some devices, especially some of the usb
+ * mass storage devices.
+ */
+#define SCSI_INQ_BUFF_LEN 254
+
+/*
+ * SCSI INQUIRY vendor and model (really product) lengths.
+ */
+#define VENDOR_LENGTH 8
+#define MODEL_LENGTH 16
+
+#define INQUIRY_CMD 0x12
+#define INQUIRY_CMDLEN 6
+
+/*
+ * INQUIRY VPD page 0x83 identifier descriptor related values. Reference the
+ * SCSI Primary Commands specification for details.
+ */
+
+/*
+ * id type values of id descriptors. These are assumed to fit in 4 bits.
+ */
+#define SCSI_ID_VENDOR_SPECIFIC 0
+#define SCSI_ID_T10_VENDOR      1
+#define SCSI_ID_EUI_64          2
+#define SCSI_ID_NAA             3
+#define SCSI_ID_RELPORT         4
+#define SCSI_ID_TGTGROUP        5
+#define SCSI_ID_LUNGROUP        6
+#define SCSI_ID_MD5             7
+#define SCSI_ID_NAME            8
+
+/*
+ * Supported NAA values. These fit in 4 bits, so the "don't care" value
+ * cannot conflict with real values.
+ */
+#define SCSI_ID_NAA_DONT_CARE         0xff
+#define SCSI_ID_NAA_IEEE_REG          0x05
+#define SCSI_ID_NAA_IEEE_REG_EXTENDED 0x06
+
+/*
+ * Supported Code Set values.
+ */
+#define SCSI_ID_BINARY 1
+#define SCSI_ID_ASCII  2
+
+struct scsi_id_search_values {
+        u_char id_type;
+        u_char naa_type;
+        u_char code_set;
+};
+
+/*
+ * Following are the "true" SCSI status codes. Linux has traditionally
+ * used a 1 bit right and masked version of these. So now CHECK_CONDITION
+ * and friends (in <scsi/scsi.h>) are deprecated.
+ */
+#define SCSI_CHECK_CONDITION         0x02
+#define SCSI_CONDITION_MET           0x04
+#define SCSI_BUSY                    0x08
+#define SCSI_IMMEDIATE               0x10
+#define SCSI_IMMEDIATE_CONDITION_MET 0x14
+#define SCSI_RESERVATION_CONFLICT    0x18
+#define SCSI_COMMAND_TERMINATED      0x22
+#define SCSI_TASK_SET_FULL           0x28
+#define SCSI_ACA_ACTIVE              0x30
+#define SCSI_TASK_ABORTED            0x40
diff --git a/src/grp-udev/scsi_id/scsi_id.c b/src/grp-udev/scsi_id/scsi_id.c
new file mode 100644
index 0000000000..4655691642
--- /dev/null
+++ b/src/grp-udev/scsi_id/scsi_id.c
@@ -0,0 +1,625 @@
+/*
+ * Copyright (C) IBM Corp. 2003
+ * Copyright (C) SUSE Linux Products GmbH, 2006
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "libudev.h"
+
+#include "fd-util.h"
+#include "libudev-private.h"
+#include "scsi_id.h"
+#include "string-util.h"
+#include "udev-util.h"
+
+static const struct option options[] = {
+        { "device",             required_argument, NULL, 'd' },
+        { "config",             required_argument, NULL, 'f' },
+        { "page",               required_argument, NULL, 'p' },
+        { "blacklisted",        no_argument,       NULL, 'b' },
+        { "whitelisted",        no_argument,       NULL, 'g' },
+        { "replace-whitespace", no_argument,       NULL, 'u' },
+        { "sg-version",         required_argument, NULL, 's' },
+        { "verbose",            no_argument,       NULL, 'v' },
+        { "version",            no_argument,       NULL, 'V' }, /* don't advertise -V */
+        { "export",             no_argument,       NULL, 'x' },
+        { "help",               no_argument,       NULL, 'h' },
+        {}
+};
+
+static bool all_good = false;
+static bool dev_specified = false;
+static char config_file[MAX_PATH_LEN] = "/etc/scsi_id.config";
+static enum page_code default_page_code = PAGE_UNSPECIFIED;
+static int sg_version = 4;
+static bool reformat_serial = false;
+static bool export = false;
+static char vendor_str[64];
+static char model_str[64];
+static char vendor_enc_str[256];
+static char model_enc_str[256];
+static char revision_str[16];
+static char type_str[16];
+
+static void set_type(const char *from, char *to, size_t len)
+{
+        int type_num;
+        char *eptr;
+        const char *type = "generic";
+
+        type_num = strtoul(from, &eptr, 0);
+        if (eptr != from) {
+                switch (type_num) {
+                case 0:
+                        type = "disk";
+                        break;
+                case 1:
+                        type = "tape";
+                        break;
+                case 4:
+                        type = "optical";
+                        break;
+                case 5:
+                        type = "cd";
+                        break;
+                case 7:
+                        type = "optical";
+                        break;
+                case 0xe:
+                        type = "disk";
+                        break;
+                case 0xf:
+                        type = "optical";
+                        break;
+                default:
+                        break;
+                }
+        }
+        strscpy(to, len, type);
+}
+
+/*
+ * get_value:
+ *
+ * buf points to an '=' followed by a quoted string ("foo") or a string ending
+ * with a space or ','.
+ *
+ * Return a pointer to the NUL terminated string, returns NULL if no
+ * matches.
+ */
+static char *get_value(char **buffer)
+{
+        static const char *quote_string = "\"\n";
+        static const char *comma_string = ",\n";
+        char *val;
+        const char *end;
+
+        if (**buffer == '"') {
+                /*
+                 * skip leading quote, terminate when quote seen
+                 */
+                (*buffer)++;
+                end = quote_string;
+        } else {
+                end = comma_string;
+        }
+        val = strsep(buffer, end);
+        if (val && end == quote_string)
+                /*
+                 * skip trailing quote
+                 */
+                (*buffer)++;
+
+        while (isspace(**buffer))
+                (*buffer)++;
+
+        return val;
+}
+
+static int argc_count(char *opts)
+{
+        int i = 0;
+        while (*opts != '\0')
+                if (*opts++ == ' ')
+                        i++;
+        return i;
+}
+
+/*
+ * get_file_options:
+ *
+ * If vendor == NULL, find a line in the config file with only "OPTIONS=";
+ * if vendor and model are set find the first OPTIONS line in the config
+ * file that matches. Set argc and argv to match the OPTIONS string.
+ *
+ * vendor and model can end in '\n'.
+ */
+static int get_file_options(struct udev *udev,
+                            const char *vendor, const char *model,
+                            int *argc, char ***newargv)
+{
+        char *buffer;
+        _cleanup_fclose_ FILE *f;
+        char *buf;
+        char *str1;
+        char *vendor_in, *model_in, *options_in; /* read in from file */
+        int lineno;
+        int c;
+        int retval = 0;
+
+        f = fopen(config_file, "re");
+        if (f == NULL) {
+                if (errno == ENOENT)
+                        return 1;
+                else {
+                        log_error_errno(errno, "can't open %s: %m", config_file);
+                        return -1;
+                }
+        }
+
+        /*
+         * Allocate a buffer rather than put it on the stack so we can
+         * keep it around to parse any options (any allocated newargv
+         * points into this buffer for its strings).
+         */
+        buffer = malloc(MAX_BUFFER_LEN);
+        if (!buffer)
+                return log_oom();
+
+        *newargv = NULL;
+        lineno = 0;
+        for (;;) {
+                vendor_in = model_in = options_in = NULL;
+
+                buf = fgets(buffer, MAX_BUFFER_LEN, f);
+                if (buf == NULL)
+                        break;
+                lineno++;
+                if (buf[strlen(buffer) - 1] != '\n') {
+                        log_error("Config file line %d too long", lineno);
+                        break;
+                }
+
+                while (isspace(*buf))
+                        buf++;
+
+                /* blank or all whitespace line */
+                if (*buf == '\0')
+                        continue;
+
+                /* comment line */
+                if (*buf == '#')
+                        continue;
+
+                str1 = strsep(&buf, "=");
+                if (str1 && strcaseeq(str1, "VENDOR")) {
+                        str1 = get_value(&buf);
+                        if (!str1) {
+                                retval = log_oom();
+                                break;
+                        }
+                        vendor_in = str1;
+
+                        str1 = strsep(&buf, "=");
+                        if (str1 && strcaseeq(str1, "MODEL")) {
+                                str1 = get_value(&buf);
+                                if (!str1) {
+                                        retval = log_oom();
+                                        break;
+                                }
+                                model_in = str1;
+                                str1 = strsep(&buf, "=");
+                        }
+                }
+
+                if (str1 && strcaseeq(str1, "OPTIONS")) {
+                        str1 = get_value(&buf);
+                        if (!str1) {
+                                retval = log_oom();
+                                break;
+                        }
+                        options_in = str1;
+                }
+
+                /*
+                 * Only allow: [vendor=foo[,model=bar]]options=stuff
+                 */
+                if (!options_in || (!vendor_in && model_in)) {
+                        log_error("Error parsing config file line %d '%s'", lineno, buffer);
+                        retval = -1;
+                        break;
+                }
+                if (vendor == NULL) {
+                        if (vendor_in == NULL)
+                                break;
+                } else if (vendor_in &&
+                           strneq(vendor, vendor_in, strlen(vendor_in)) &&
+                           (!model_in ||
+                            (strneq(model, model_in, strlen(model_in))))) {
+                                /*
+                                 * Matched vendor and optionally model.
+                                 *
+                                 * Note: a short vendor_in or model_in can
+                                 * give a partial match (that is FOO
+                                 * matches FOOBAR).
+                                 */
+                                break;
+                }
+        }
+
+        if (retval == 0) {
+                if (vendor_in != NULL || model_in != NULL ||
+                    options_in != NULL) {
+                        /*
+                         * Something matched. Allocate newargv, and store
+                         * values found in options_in.
+                         */
+                        strcpy(buffer, options_in);
+                        c = argc_count(buffer) + 2;
+                        *newargv = calloc(c, sizeof(**newargv));
+                        if (!*newargv)
+                                retval = log_oom();
+                        else {
+                                *argc = c;
+                                c = 0;
+                                /*
+                                 * argv[0] at 0 is skipped by getopt, but
+                                 * store the buffer address there for
+                                 * later freeing
+                                 */
+                                (*newargv)[c] = buffer;
+                                for (c = 1; c < *argc; c++)
+                                        (*newargv)[c] = strsep(&buffer, " \t");
+                        }
+                } else {
+                        /* No matches  */
+                        retval = 1;
+                }
+        }
+        if (retval != 0)
+                free(buffer);
+        return retval;
+}
+
+static void help(void) {
+        printf("Usage: %s [OPTION...] DEVICE\n\n"
+               "SCSI device identification.\n\n"
+               "  -h --help                        Print this message\n"
+               "     --version                     Print version of the program\n\n"
+               "  -d --device=                     Device node for SG_IO commands\n"
+               "  -f --config=                     Location of config file\n"
+               "  -p --page=0x80|0x83|pre-spc3-83  SCSI page (0x80, 0x83, pre-spc3-83)\n"
+               "  -s --sg-version=3|4              Use SGv3 or SGv4\n"
+               "  -b --blacklisted                 Treat device as blacklisted\n"
+               "  -g --whitelisted                 Treat device as whitelisted\n"
+               "  -u --replace-whitespace          Replace all whitespace by underscores\n"
+               "  -v --verbose                     Verbose logging\n"
+               "  -x --export                      Print values as environment keys\n"
+               , program_invocation_short_name);
+
+}
+
+static int set_options(struct udev *udev,
+                       int argc, char **argv,
+                       char *maj_min_dev)
+{
+        int option;
+
+        /*
+         * optind is a global extern used by getopt. Since we can call
+         * set_options twice (once for command line, and once for config
+         * file) we have to reset this back to 1.
+         */
+        optind = 1;
+        while ((option = getopt_long(argc, argv, "d:f:gp:uvVxh", options, NULL)) >= 0)
+                switch (option) {
+                case 'b':
+                        all_good = false;
+                        break;
+
+                case 'd':
+                        dev_specified = true;
+                        strscpy(maj_min_dev, MAX_PATH_LEN, optarg);
+                        break;
+
+                case 'f':
+                        strscpy(config_file, MAX_PATH_LEN, optarg);
+                        break;
+
+                case 'g':
+                        all_good = true;
+                        break;
+
+                case 'h':
+                        help();
+                        exit(0);
+
+                case 'p':
+                        if (streq(optarg, "0x80"))
+                                default_page_code = PAGE_80;
+                        else if (streq(optarg, "0x83"))
+                                default_page_code = PAGE_83;
+                        else if (streq(optarg, "pre-spc3-83"))
+                                default_page_code = PAGE_83_PRE_SPC3;
+                        else {
+                                log_error("Unknown page code '%s'", optarg);
+                                return -1;
+                        }
+                        break;
+
+                case 's':
+                        sg_version = atoi(optarg);
+                        if (sg_version < 3 || sg_version > 4) {
+                                log_error("Unknown SG version '%s'", optarg);
+                                return -1;
+                        }
+                        break;
+
+                case 'u':
+                        reformat_serial = true;
+                        break;
+
+                case 'v':
+                        log_set_target(LOG_TARGET_CONSOLE);
+                        log_set_max_level(LOG_DEBUG);
+                        log_open();
+                        break;
+
+                case 'V':
+                        printf("%s\n", VERSION);
+                        exit(0);
+
+                case 'x':
+                        export = true;
+                        break;
+
+                case '?':
+                        return -1;
+
+                default:
+                        assert_not_reached("Unknown option");
+                }
+
+        if (optind < argc && !dev_specified) {
+                dev_specified = true;
+                strscpy(maj_min_dev, MAX_PATH_LEN, argv[optind]);
+        }
+
+        return 0;
+}
+
+static int per_dev_options(struct udev *udev,
+                           struct scsi_id_device *dev_scsi, int *good_bad, int *page_code)
+{
+        int retval;
+        int newargc;
+        char **newargv = NULL;
+        int option;
+
+        *good_bad = all_good;
+        *page_code = default_page_code;
+
+        retval = get_file_options(udev, vendor_str, model_str, &newargc, &newargv);
+
+        optind = 1; /* reset this global extern */
+        while (retval == 0) {
+                option = getopt_long(newargc, newargv, "bgp:", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'b':
+                        *good_bad = 0;
+                        break;
+
+                case 'g':
+                        *good_bad = 1;
+                        break;
+
+                case 'p':
+                        if (streq(optarg, "0x80")) {
+                                *page_code = PAGE_80;
+                        } else if (streq(optarg, "0x83")) {
+                                *page_code = PAGE_83;
+                        } else if (streq(optarg, "pre-spc3-83")) {
+                                *page_code = PAGE_83_PRE_SPC3;
+                        } else {
+                                log_error("Unknown page code '%s'", optarg);
+                                retval = -1;
+                        }
+                        break;
+
+                default:
+                        log_error("Unknown or bad option '%c' (0x%x)", option, option);
+                        retval = -1;
+                        break;
+                }
+        }
+
+        if (newargv) {
+                free(newargv[0]);
+                free(newargv);
+        }
+        return retval;
+}
+
+static int set_inq_values(struct udev *udev, struct scsi_id_device *dev_scsi, const char *path)
+{
+        int retval;
+
+        dev_scsi->use_sg = sg_version;
+
+        retval = scsi_std_inquiry(udev, dev_scsi, path);
+        if (retval)
+                return retval;
+
+        udev_util_encode_string(dev_scsi->vendor, vendor_enc_str, sizeof(vendor_enc_str));
+        udev_util_encode_string(dev_scsi->model, model_enc_str, sizeof(model_enc_str));
+
+        util_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str));
+        util_replace_chars(vendor_str, NULL);
+        util_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str));
+        util_replace_chars(model_str, NULL);
+        set_type(dev_scsi->type, type_str, sizeof(type_str));
+        util_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str));
+        util_replace_chars(revision_str, NULL);
+        return 0;
+}
+
+/*
+ * scsi_id: try to get an id, if one is found, printf it to stdout.
+ * returns a value passed to exit() - 0 if printed an id, else 1.
+ */
+static int scsi_id(struct udev *udev, char *maj_min_dev)
+{
+        struct scsi_id_device dev_scsi = {};
+        int good_dev;
+        int page_code;
+        int retval = 0;
+
+        if (set_inq_values(udev, &dev_scsi, maj_min_dev) < 0) {
+                retval = 1;
+                goto out;
+        }
+
+        /* get per device (vendor + model) options from the config file */
+        per_dev_options(udev, &dev_scsi, &good_dev, &page_code);
+        if (!good_dev) {
+                retval = 1;
+                goto out;
+        }
+
+        /* read serial number from mode pages (no values for optical drives) */
+        scsi_get_serial(udev, &dev_scsi, maj_min_dev, page_code, MAX_SERIAL_LEN);
+
+        if (export) {
+                char serial_str[MAX_SERIAL_LEN];
+
+                printf("ID_SCSI=1\n");
+                printf("ID_VENDOR=%s\n", vendor_str);
+                printf("ID_VENDOR_ENC=%s\n", vendor_enc_str);
+                printf("ID_MODEL=%s\n", model_str);
+                printf("ID_MODEL_ENC=%s\n", model_enc_str);
+                printf("ID_REVISION=%s\n", revision_str);
+                printf("ID_TYPE=%s\n", type_str);
+                if (dev_scsi.serial[0] != '\0') {
+                        util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
+                        util_replace_chars(serial_str, NULL);
+                        printf("ID_SERIAL=%s\n", serial_str);
+                        util_replace_whitespace(dev_scsi.serial_short, serial_str, sizeof(serial_str));
+                        util_replace_chars(serial_str, NULL);
+                        printf("ID_SERIAL_SHORT=%s\n", serial_str);
+                }
+                if (dev_scsi.wwn[0] != '\0') {
+                        printf("ID_WWN=0x%s\n", dev_scsi.wwn);
+                        if (dev_scsi.wwn_vendor_extension[0] != '\0') {
+                                printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension);
+                                printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension);
+                        } else
+                                printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn);
+                }
+                if (dev_scsi.tgpt_group[0] != '\0')
+                        printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group);
+                if (dev_scsi.unit_serial_number[0] != '\0')
+                        printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number);
+                goto out;
+        }
+
+        if (dev_scsi.serial[0] == '\0') {
+                retval = 1;
+                goto out;
+        }
+
+        if (reformat_serial) {
+                char serial_str[MAX_SERIAL_LEN];
+
+                util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
+                util_replace_chars(serial_str, NULL);
+                printf("%s\n", serial_str);
+                goto out;
+        }
+
+        printf("%s\n", dev_scsi.serial);
+out:
+        return retval;
+}
+
+int main(int argc, char **argv)
+{
+        _cleanup_udev_unref_ struct udev *udev;
+        int retval = 0;
+        char maj_min_dev[MAX_PATH_LEN];
+        int newargc;
+        char **newargv = NULL;
+
+        log_parse_environment();
+        log_open();
+
+        udev = udev_new();
+        if (udev == NULL)
+                goto exit;
+
+        /*
+         * Get config file options.
+         */
+        retval = get_file_options(udev, NULL, NULL, &newargc, &newargv);
+        if (retval < 0) {
+                retval = 1;
+                goto exit;
+        }
+        if (retval == 0) {
+                assert(newargv);
+
+                if (set_options(udev, newargc, newargv, maj_min_dev) < 0) {
+                        retval = 2;
+                        goto exit;
+                }
+        }
+
+        /*
+         * Get command line options (overriding any config file settings).
+         */
+        if (set_options(udev, argc, argv, maj_min_dev) < 0)
+                exit(1);
+
+        if (!dev_specified) {
+                log_error("No device specified.");
+                retval = 1;
+                goto exit;
+        }
+
+        retval = scsi_id(udev, maj_min_dev);
+
+exit:
+        if (newargv) {
+                free(newargv[0]);
+                free(newargv);
+        }
+        log_close();
+        return retval;
+}
diff --git a/src/grp-udev/scsi_id/scsi_id.h b/src/grp-udev/scsi_id/scsi_id.h
new file mode 100644
index 0000000000..5c2e1c28ee
--- /dev/null
+++ b/src/grp-udev/scsi_id/scsi_id.h
@@ -0,0 +1,75 @@
+#pragma once
+
+/*
+ * Copyright (C) IBM Corp. 2003
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define MAX_PATH_LEN 512
+
+/*
+ * MAX_ATTR_LEN: maximum length of the result of reading a sysfs
+ * attribute.
+ */
+#define MAX_ATTR_LEN 256
+
+/*
+ * MAX_SERIAL_LEN: the maximum length of the serial number, including
+ * added prefixes such as vendor and product (model) strings.
+ */
+#define MAX_SERIAL_LEN 256
+
+/*
+ * MAX_BUFFER_LEN: maximum buffer size and line length used while reading
+ * the config file.
+ */
+#define MAX_BUFFER_LEN 256
+
+struct scsi_id_device {
+        char vendor[9];
+        char model[17];
+        char revision[5];
+        char type[33];
+        char kernel[64];
+        char serial[MAX_SERIAL_LEN];
+        char serial_short[MAX_SERIAL_LEN];
+        int use_sg;
+
+        /* Always from page 0x80 e.g. 'B3G1P8500RWT' - may not be unique */
+        char unit_serial_number[MAX_SERIAL_LEN];
+
+        /* NULs if not set - otherwise hex encoding using lower-case e.g. '50014ee0016eb572' */
+        char wwn[17];
+
+        /* NULs if not set - otherwise hex encoding using lower-case e.g. '0xe00000d80000' */
+        char wwn_vendor_extension[17];
+
+        /* NULs if not set - otherwise decimal number */
+        char tgpt_group[8];
+};
+
+int scsi_std_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, const char *devname);
+int scsi_get_serial(struct udev *udev, struct scsi_id_device *dev_scsi, const char *devname,
+                    int page_code, int len);
+
+/*
+ * Page code values.
+ */
+enum page_code {
+        PAGE_83_PRE_SPC3 = -0x83,
+        PAGE_UNSPECIFIED = 0x00,
+        PAGE_80          = 0x80,
+        PAGE_83          = 0x83,
+};
diff --git a/src/grp-udev/scsi_id/scsi_serial.c b/src/grp-udev/scsi_id/scsi_serial.c
new file mode 100644
index 0000000000..e079e28698
--- /dev/null
+++ b/src/grp-udev/scsi_id/scsi_serial.c
@@ -0,0 +1,964 @@
+/*
+ * Copyright (C) IBM Corp. 2003
+ *
+ * Author: Patrick Mansfield<patmans@us.ibm.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <linux/bsg.h>
+#include <linux/types.h>
+#include <scsi/scsi.h>
+#include <scsi/sg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "libudev.h"
+
+#include "libudev-private.h"
+#include "random-util.h"
+#include "scsi.h"
+#include "scsi_id.h"
+#include "string-util.h"
+
+/*
+ * A priority based list of id, naa, and binary/ascii for the identifier
+ * descriptor in VPD page 0x83.
+ *
+ * Brute force search for a match starting with the first value in the
+ * following id_search_list. This is not a performance issue, since there
+ * is normally one or some small number of descriptors.
+ */
+static const struct scsi_id_search_values id_search_list[] = {
+        { SCSI_ID_TGTGROUP, SCSI_ID_NAA_DONT_CARE,         SCSI_ID_BINARY },
+        { SCSI_ID_NAA,      SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY },
+        { SCSI_ID_NAA,      SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII  },
+        { SCSI_ID_NAA,      SCSI_ID_NAA_IEEE_REG,          SCSI_ID_BINARY },
+        { SCSI_ID_NAA,      SCSI_ID_NAA_IEEE_REG,          SCSI_ID_ASCII  },
+        /*
+         * Devices already exist using NAA values that are now marked
+         * reserved. These should not conflict with other values, or it is
+         * a bug in the device. As long as we find the IEEE extended one
+         * first, we really don't care what other ones are used. Using
+         * don't care here means that a device that returns multiple
+         * non-IEEE descriptors in a random order will get different
+         * names.
+         */
+        { SCSI_ID_NAA,             SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
+        { SCSI_ID_NAA,             SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII  },
+        { SCSI_ID_EUI_64,          SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
+        { SCSI_ID_EUI_64,          SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII  },
+        { SCSI_ID_T10_VENDOR,      SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
+        { SCSI_ID_T10_VENDOR,      SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII  },
+        { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY },
+        { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII  },
+};
+
+static const char hex_str[]="0123456789abcdef";
+
+/*
+ * Values returned in the result/status, only the ones used by the code
+ * are used here.
+ */
+
+#define DID_NO_CONNECT               0x01        /* Unable to connect before timeout */
+#define DID_BUS_BUSY                 0x02        /* Bus remain busy until timeout */
+#define DID_TIME_OUT                 0x03        /* Timed out for some other reason */
+#define DRIVER_TIMEOUT               0x06
+#define DRIVER_SENSE                 0x08        /* Sense_buffer has been set */
+
+/* The following "category" function returns one of the following */
+#define SG_ERR_CAT_CLEAN                0        /* No errors or other information */
+#define SG_ERR_CAT_MEDIA_CHANGED        1        /* interpreted from sense buffer */
+#define SG_ERR_CAT_RESET                2        /* interpreted from sense buffer */
+#define SG_ERR_CAT_TIMEOUT              3
+#define SG_ERR_CAT_RECOVERED            4        /* Successful command after recovered err */
+#define SG_ERR_CAT_NOTSUPPORTED         5        /* Illegal / unsupported command */
+#define SG_ERR_CAT_SENSE               98        /* Something else in the sense buffer */
+#define SG_ERR_CAT_OTHER               99        /* Some other error/warning */
+
+static int do_scsi_page80_inquiry(struct udev *udev,
+                                  struct scsi_id_device *dev_scsi, int fd,
+                                  char *serial, char *serial_short, int max_len);
+
+static int sg_err_category_new(struct udev *udev,
+                               int scsi_status, int msg_status, int
+                               host_status, int driver_status, const
+                               unsigned char *sense_buffer, int sb_len)
+{
+        scsi_status &= 0x7e;
+
+        /*
+         * XXX change to return only two values - failed or OK.
+         */
+
+        if (!scsi_status && !host_status && !driver_status)
+                return SG_ERR_CAT_CLEAN;
+
+        if ((scsi_status == SCSI_CHECK_CONDITION) ||
+            (scsi_status == SCSI_COMMAND_TERMINATED) ||
+            ((driver_status & 0xf) == DRIVER_SENSE)) {
+                if (sense_buffer && (sb_len > 2)) {
+                        int sense_key;
+                        unsigned char asc;
+
+                        if (sense_buffer[0] & 0x2) {
+                                sense_key = sense_buffer[1] & 0xf;
+                                asc = sense_buffer[2];
+                        } else {
+                                sense_key = sense_buffer[2] & 0xf;
+                                asc = (sb_len > 12) ? sense_buffer[12] : 0;
+                        }
+
+                        if (sense_key == RECOVERED_ERROR)
+                                return SG_ERR_CAT_RECOVERED;
+                        else if (sense_key == UNIT_ATTENTION) {
+                                if (0x28 == asc)
+                                        return SG_ERR_CAT_MEDIA_CHANGED;
+                                if (0x29 == asc)
+                                        return SG_ERR_CAT_RESET;
+                        } else if (sense_key == ILLEGAL_REQUEST)
+                                return SG_ERR_CAT_NOTSUPPORTED;
+                }
+                return SG_ERR_CAT_SENSE;
+        }
+        if (host_status) {
+                if ((host_status == DID_NO_CONNECT) ||
+                    (host_status == DID_BUS_BUSY) ||
+                    (host_status == DID_TIME_OUT))
+                        return SG_ERR_CAT_TIMEOUT;
+        }
+        if (driver_status) {
+                if (driver_status == DRIVER_TIMEOUT)
+                        return SG_ERR_CAT_TIMEOUT;
+        }
+        return SG_ERR_CAT_OTHER;
+}
+
+static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp)
+{
+        return sg_err_category_new(udev,
+                                   hp->status, hp->msg_status,
+                                   hp->host_status, hp->driver_status,
+                                   hp->sbp, hp->sb_len_wr);
+}
+
+static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp)
+{
+        return sg_err_category_new(udev, hp->device_status, 0,
+                                   hp->transport_status, hp->driver_status,
+                                   (unsigned char *)(uintptr_t)hp->response,
+                                   hp->response_len);
+}
+
+static int scsi_dump_sense(struct udev *udev,
+                           struct scsi_id_device *dev_scsi,
+                           unsigned char *sense_buffer, int sb_len)
+{
+        int s;
+        int code;
+        int sense_class;
+        int sense_key;
+        int asc, ascq;
+#ifdef DUMP_SENSE
+        char out_buffer[256];
+        int i, j;
+#endif
+
+        /*
+         * Figure out and print the sense key, asc and ascq.
+         *
+         * If you want to suppress these for a particular drive model, add
+         * a black list entry in the scsi_id config file.
+         *
+         * XXX We probably need to: lookup the sense/asc/ascq in a retry
+         * table, and if found return 1 (after dumping the sense, asc, and
+         * ascq). So, if/when we get something like a power on/reset,
+         * we'll retry the command.
+         */
+
+        if (sb_len < 1) {
+                log_debug("%s: sense buffer empty", dev_scsi->kernel);
+                return -1;
+        }
+
+        sense_class = (sense_buffer[0] >> 4) & 0x07;
+        code = sense_buffer[0] & 0xf;
+
+        if (sense_class == 7) {
+                /*
+                 * extended sense data.
+                 */
+                s = sense_buffer[7] + 8;
+                if (sb_len < s) {
+                        log_debug("%s: sense buffer too small %d bytes, %d bytes too short",
+                                  dev_scsi->kernel, sb_len, s - sb_len);
+                        return -1;
+                }
+                if ((code == 0x0) || (code == 0x1)) {
+                        sense_key = sense_buffer[2] & 0xf;
+                        if (s < 14) {
+                                /*
+                                 * Possible?
+                                 */
+                                log_debug("%s: sense result too" " small %d bytes",
+                                          dev_scsi->kernel, s);
+                                return -1;
+                        }
+                        asc = sense_buffer[12];
+                        ascq = sense_buffer[13];
+                } else if ((code == 0x2) || (code == 0x3)) {
+                        sense_key = sense_buffer[1] & 0xf;
+                        asc = sense_buffer[2];
+                        ascq = sense_buffer[3];
+                } else {
+                        log_debug("%s: invalid sense code 0x%x",
+                                  dev_scsi->kernel, code);
+                        return -1;
+                }
+                log_debug("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x",
+                          dev_scsi->kernel, sense_key, asc, ascq);
+        } else {
+                if (sb_len < 4) {
+                        log_debug("%s: sense buffer too small %d bytes, %d bytes too short",
+                                  dev_scsi->kernel, sb_len, 4 - sb_len);
+                        return -1;
+                }
+
+                if (sense_buffer[0] < 15)
+                        log_debug("%s: old sense key: 0x%x", dev_scsi->kernel, sense_buffer[0] & 0x0f);
+                else
+                        log_debug("%s: sense = %2x %2x",
+                                  dev_scsi->kernel, sense_buffer[0], sense_buffer[2]);
+                log_debug("%s: non-extended sense class %d code 0x%0x",
+                          dev_scsi->kernel, sense_class, code);
+
+        }
+
+#ifdef DUMP_SENSE
+        for (i = 0, j = 0; (i < s) && (j < 254); i++) {
+                out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4];
+                out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f];
+                out_buffer[j++] = ' ';
+        }
+        out_buffer[j] = '\0';
+        log_debug("%s: sense dump:", dev_scsi->kernel);
+        log_debug("%s: %s", dev_scsi->kernel, out_buffer);
+
+#endif
+        return -1;
+}
+
+static int scsi_dump(struct udev *udev,
+                     struct scsi_id_device *dev_scsi, struct sg_io_hdr *io)
+{
+        if (!io->status && !io->host_status && !io->msg_status &&
+            !io->driver_status) {
+                /*
+                 * Impossible, should not be called.
+                 */
+                log_debug("%s: called with no error", __FUNCTION__);
+                return -1;
+        }
+
+        log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x",
+                  dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status);
+        if (io->status == SCSI_CHECK_CONDITION)
+                return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr);
+        else
+                return -1;
+}
+
+static int scsi_dump_v4(struct udev *udev,
+                        struct scsi_id_device *dev_scsi, struct sg_io_v4 *io)
+{
+        if (!io->device_status && !io->transport_status &&
+            !io->driver_status) {
+                /*
+                 * Impossible, should not be called.
+                 */
+                log_debug("%s: called with no error", __FUNCTION__);
+                return -1;
+        }
+
+        log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x",
+                  dev_scsi->kernel, io->driver_status, io->transport_status, io->device_status);
+        if (io->device_status == SCSI_CHECK_CONDITION)
+                return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response,
+                                       io->response_len);
+        else
+                return -1;
+}
+
+static int scsi_inquiry(struct udev *udev,
+                        struct scsi_id_device *dev_scsi, int fd,
+                        unsigned char evpd, unsigned char page,
+                        unsigned char *buf, unsigned int buflen)
+{
+        unsigned char inq_cmd[INQUIRY_CMDLEN] =
+                { INQUIRY_CMD, evpd, page, 0, buflen, 0 };
+        unsigned char sense[SENSE_BUFF_LEN];
+        void *io_buf;
+        struct sg_io_v4 io_v4;
+        struct sg_io_hdr io_hdr;
+        int retry = 3; /* rather random */
+        int retval;
+
+        if (buflen > SCSI_INQ_BUFF_LEN) {
+                log_debug("buflen %d too long", buflen);
+                return -1;
+        }
+
+resend:
+        if (dev_scsi->use_sg == 4) {
+                memzero(&io_v4, sizeof(struct sg_io_v4));
+                io_v4.guard = 'Q';
+                io_v4.protocol = BSG_PROTOCOL_SCSI;
+                io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
+                io_v4.request_len = sizeof(inq_cmd);
+                io_v4.request = (uintptr_t)inq_cmd;
+                io_v4.max_response_len = sizeof(sense);
+                io_v4.response = (uintptr_t)sense;
+                io_v4.din_xfer_len = buflen;
+                io_v4.din_xferp = (uintptr_t)buf;
+                io_buf = (void *)&io_v4;
+        } else {
+                memzero(&io_hdr, sizeof(struct sg_io_hdr));
+                io_hdr.interface_id = 'S';
+                io_hdr.cmd_len = sizeof(inq_cmd);
+                io_hdr.mx_sb_len = sizeof(sense);
+                io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+                io_hdr.dxfer_len = buflen;
+                io_hdr.dxferp = buf;
+                io_hdr.cmdp = inq_cmd;
+                io_hdr.sbp = sense;
+                io_hdr.timeout = DEF_TIMEOUT;
+                io_buf = (void *)&io_hdr;
+        }
+
+        retval = ioctl(fd, SG_IO, io_buf);
+        if (retval < 0) {
+                if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) {
+                        dev_scsi->use_sg = 3;
+                        goto resend;
+                }
+                log_debug_errno(errno, "%s: ioctl failed: %m", dev_scsi->kernel);
+                goto error;
+        }
+
+        if (dev_scsi->use_sg == 4)
+                retval = sg_err_category4(udev, io_buf);
+        else
+                retval = sg_err_category3(udev, io_buf);
+
+        switch (retval) {
+                case SG_ERR_CAT_NOTSUPPORTED:
+                        buf[1] = 0;
+                        /* Fallthrough */
+                case SG_ERR_CAT_CLEAN:
+                case SG_ERR_CAT_RECOVERED:
+                        retval = 0;
+                        break;
+
+                default:
+                        if (dev_scsi->use_sg == 4)
+                                retval = scsi_dump_v4(udev, dev_scsi, io_buf);
+                        else
+                                retval = scsi_dump(udev, dev_scsi, io_buf);
+        }
+
+        if (!retval) {
+                retval = buflen;
+        } else if (retval > 0) {
+                if (--retry > 0)
+                        goto resend;
+                retval = -1;
+        }
+
+error:
+        if (retval < 0)
+                log_debug("%s: Unable to get INQUIRY vpd %d page 0x%x.",
+                          dev_scsi->kernel, evpd, page);
+
+        return retval;
+}
+
+/* Get list of supported EVPD pages */
+static int do_scsi_page0_inquiry(struct udev *udev,
+                                 struct scsi_id_device *dev_scsi, int fd,
+                                 unsigned char *buffer, unsigned int len)
+{
+        int retval;
+
+        memzero(buffer, len);
+        retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len);
+        if (retval < 0)
+                return 1;
+
+        if (buffer[1] != 0) {
+                log_debug("%s: page 0 not available.", dev_scsi->kernel);
+                return 1;
+        }
+        if (buffer[3] > len) {
+                log_debug("%s: page 0 buffer too long %d", dev_scsi->kernel, buffer[3]);
+                return 1;
+        }
+
+        /*
+         * Following check is based on code once included in the 2.5.x
+         * kernel.
+         *
+         * Some ill behaved devices return the standard inquiry here
+         * rather than the evpd data, snoop the data to verify.
+         */
+        if (buffer[3] > MODEL_LENGTH) {
+                /*
+                 * If the vendor id appears in the page assume the page is
+                 * invalid.
+                 */
+                if (strneq((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) {
+                        log_debug("%s: invalid page0 data", dev_scsi->kernel);
+                        return 1;
+                }
+        }
+        return 0;
+}
+
+/*
+ * The caller checks that serial is long enough to include the vendor +
+ * model.
+ */
+static int prepend_vendor_model(struct udev *udev,
+                                struct scsi_id_device *dev_scsi, char *serial)
+{
+        int ind;
+
+        strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH);
+        strncat(serial, dev_scsi->model, MODEL_LENGTH);
+        ind = strlen(serial);
+
+        /*
+         * This is not a complete check, since we are using strncat/cpy
+         * above, ind will never be too large.
+         */
+        if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) {
+                log_debug("%s: expected length %d, got length %d",
+                          dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind);
+                return -1;
+        }
+        return ind;
+}
+
+/*
+ * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill
+ * serial number.
+ */
+static int check_fill_0x83_id(struct udev *udev,
+                              struct scsi_id_device *dev_scsi,
+                              unsigned char *page_83,
+                              const struct scsi_id_search_values
+                              *id_search, char *serial, char *serial_short,
+                              int max_len, char *wwn,
+                              char *wwn_vendor_extension, char *tgpt_group)
+{
+        int i, j, s, len;
+
+        /*
+         * ASSOCIATION must be with the device (value 0)
+         * or with the target port for SCSI_ID_TGTPORT
+         */
+        if ((page_83[1] & 0x30) == 0x10) {
+                if (id_search->id_type != SCSI_ID_TGTGROUP)
+                        return 1;
+        } else if ((page_83[1] & 0x30) != 0)
+                return 1;
+
+        if ((page_83[1] & 0x0f) != id_search->id_type)
+                return 1;
+
+        /*
+         * Possibly check NAA sub-type.
+         */
+        if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) &&
+            (id_search->naa_type != (page_83[4] & 0xf0) >> 4))
+                return 1;
+
+        /*
+         * Check for matching code set - ASCII or BINARY.
+         */
+        if ((page_83[0] & 0x0f) != id_search->code_set)
+                return 1;
+
+        /*
+         * page_83[3]: identifier length
+         */
+        len = page_83[3];
+        if ((page_83[0] & 0x0f) != SCSI_ID_ASCII)
+                /*
+                 * If not ASCII, use two bytes for each binary value.
+                 */
+                len *= 2;
+
+        /*
+         * Add one byte for the NUL termination, and one for the id_type.
+         */
+        len += 2;
+        if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
+                len += VENDOR_LENGTH + MODEL_LENGTH;
+
+        if (max_len < len) {
+                log_debug("%s: length %d too short - need %d",
+                          dev_scsi->kernel, max_len, len);
+                return 1;
+        }
+
+        if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) {
+                unsigned int group;
+
+                group = ((unsigned int)page_83[6] << 8) | page_83[7];
+                sprintf(tgpt_group,"%x", group);
+                return 1;
+        }
+
+        serial[0] = hex_str[id_search->id_type];
+
+        /*
+         * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before
+         * the id since it is not unique across all vendors and models,
+         * this differs from SCSI_ID_T10_VENDOR, where the vendor is
+         * included in the identifier.
+         */
+        if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC)
+                if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0)
+                        return 1;
+
+        i = 4; /* offset to the start of the identifier */
+        s = j = strlen(serial);
+        if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) {
+                /*
+                 * ASCII descriptor.
+                 */
+                while (i < (4 + page_83[3]))
+                        serial[j++] = page_83[i++];
+        } else {
+                /*
+                 * Binary descriptor, convert to ASCII, using two bytes of
+                 * ASCII for each byte in the page_83.
+                 */
+                while (i < (4 + page_83[3])) {
+                        serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
+                        serial[j++] = hex_str[page_83[i] & 0x0f];
+                        i++;
+                }
+        }
+
+        strcpy(serial_short, &serial[s]);
+
+        if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) {
+                strncpy(wwn, &serial[s], 16);
+                if (wwn_vendor_extension != NULL)
+                        strncpy(wwn_vendor_extension, &serial[s + 16], 16);
+        }
+
+        return 0;
+}
+
+/* Extract the raw binary from VPD 0x83 pre-SPC devices */
+static int check_fill_0x83_prespc3(struct udev *udev,
+                                   struct scsi_id_device *dev_scsi,
+                                   unsigned char *page_83,
+                                   const struct scsi_id_search_values
+                                   *id_search, char *serial, char *serial_short, int max_len)
+{
+        int i, j;
+
+        serial[0] = hex_str[id_search->id_type];
+        /* serial has been memset to zero before */
+        j = strlen(serial);        /* j = 1; */
+
+        for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) {
+                serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4];
+                serial[j++] = hex_str[ page_83[4+i] & 0x0f];
+        }
+        serial[max_len-1] = 0;
+        strncpy(serial_short, serial, max_len-1);
+        return 0;
+}
+
+
+/* Get device identification VPD page */
+static int do_scsi_page83_inquiry(struct udev *udev,
+                                  struct scsi_id_device *dev_scsi, int fd,
+                                  char *serial, char *serial_short, int len,
+                                  char *unit_serial_number, char *wwn,
+                                  char *wwn_vendor_extension, char *tgpt_group)
+{
+        int retval;
+        unsigned int id_ind, j;
+        unsigned char page_83[SCSI_INQ_BUFF_LEN];
+
+        /* also pick up the page 80 serial number */
+        do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_LEN);
+
+        memzero(page_83, SCSI_INQ_BUFF_LEN);
+        retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83,
+                              SCSI_INQ_BUFF_LEN);
+        if (retval < 0)
+                return 1;
+
+        if (page_83[1] != PAGE_83) {
+                log_debug("%s: Invalid page 0x83", dev_scsi->kernel);
+                return 1;
+        }
+
+        /*
+         * XXX Some devices (IBM 3542) return all spaces for an identifier if
+         * the LUN is not actually configured. This leads to identifiers of
+         * the form: "1            ".
+         */
+
+        /*
+         * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
+         * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
+         *
+         * The SCSI-2 page 83 format returns an IEEE WWN in binary
+         * encoded hexi-decimal in the 16 bytes following the initial
+         * 4-byte page 83 reply header.
+         *
+         * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
+         * of an Identification descriptor.  The 3rd byte of the first
+         * Identification descriptor is a reserved (BSZ) byte field.
+         *
+         * Reference the 7th byte of the page 83 reply to determine
+         * whether the reply is compliant with SCSI-2 or SPC-2/3
+         * specifications.  A zero value in the 7th byte indicates
+         * an SPC-2/3 conformant reply, (i.e., the reserved field of the
+         * first Identification descriptor).  This byte will be non-zero
+         * for a SCSI-2 conformant page 83 reply from these EMC
+         * Symmetrix models since the 7th byte of the reply corresponds
+         * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
+         * 0x006048.
+         */
+
+        if (page_83[6] != 0)
+                return check_fill_0x83_prespc3(udev,
+                                               dev_scsi, page_83, id_search_list,
+                                               serial, serial_short, len);
+
+        /*
+         * Search for a match in the prioritized id_search_list - since WWN ids
+         * come first we can pick up the WWN in check_fill_0x83_id().
+         */
+        for (id_ind = 0;
+             id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]);
+             id_ind++) {
+                /*
+                 * Examine each descriptor returned. There is normally only
+                 * one or a small number of descriptors.
+                 */
+                for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) {
+                        retval = check_fill_0x83_id(udev,
+                                                    dev_scsi, &page_83[j],
+                                                    &id_search_list[id_ind],
+                                                    serial, serial_short, len,
+                                                    wwn, wwn_vendor_extension,
+                                                    tgpt_group);
+                        if (!retval)
+                                return retval;
+                        else if (retval < 0)
+                                return retval;
+                }
+        }
+        return 1;
+}
+
+/*
+ * Get device identification VPD page for older SCSI-2 device which is not
+ * compliant with either SPC-2 or SPC-3 format.
+ *
+ * Return the hard coded error code value 2 if the page 83 reply is not
+ * conformant to the SCSI-2 format.
+ */
+static int do_scsi_page83_prespc3_inquiry(struct udev *udev,
+                                          struct scsi_id_device *dev_scsi, int fd,
+                                          char *serial, char *serial_short, int len)
+{
+        int retval;
+        int i, j;
+        unsigned char page_83[SCSI_INQ_BUFF_LEN];
+
+        memzero(page_83, SCSI_INQ_BUFF_LEN);
+        retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN);
+        if (retval < 0)
+                return 1;
+
+        if (page_83[1] != PAGE_83) {
+                log_debug("%s: Invalid page 0x83", dev_scsi->kernel);
+                return 1;
+        }
+        /*
+         * Model 4, 5, and (some) model 6 EMC Symmetrix devices return
+         * a page 83 reply according to SCSI-2 format instead of SPC-2/3.
+         *
+         * The SCSI-2 page 83 format returns an IEEE WWN in binary
+         * encoded hexi-decimal in the 16 bytes following the initial
+         * 4-byte page 83 reply header.
+         *
+         * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part
+         * of an Identification descriptor.  The 3rd byte of the first
+         * Identification descriptor is a reserved (BSZ) byte field.
+         *
+         * Reference the 7th byte of the page 83 reply to determine
+         * whether the reply is compliant with SCSI-2 or SPC-2/3
+         * specifications.  A zero value in the 7th byte indicates
+         * an SPC-2/3 conformant reply, (i.e., the reserved field of the
+         * first Identification descriptor).  This byte will be non-zero
+         * for a SCSI-2 conformant page 83 reply from these EMC
+         * Symmetrix models since the 7th byte of the reply corresponds
+         * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is,
+         * 0x006048.
+         */
+        if (page_83[6] == 0)
+                return 2;
+
+        serial[0] = hex_str[id_search_list[0].id_type];
+        /*
+         * The first four bytes contain data, not a descriptor.
+         */
+        i = 4;
+        j = strlen(serial);
+        /*
+         * Binary descriptor, convert to ASCII,
+         * using two bytes of ASCII for each byte
+         * in the page_83.
+         */
+        while (i < (page_83[3]+4)) {
+                serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4];
+                serial[j++] = hex_str[page_83[i] & 0x0f];
+                i++;
+        }
+        return 0;
+}
+
+/* Get unit serial number VPD page */
+static int do_scsi_page80_inquiry(struct udev *udev,
+                                  struct scsi_id_device *dev_scsi, int fd,
+                                  char *serial, char *serial_short, int max_len)
+{
+        int retval;
+        int ser_ind;
+        int i;
+        int len;
+        unsigned char buf[SCSI_INQ_BUFF_LEN];
+
+        memzero(buf, SCSI_INQ_BUFF_LEN);
+        retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN);
+        if (retval < 0)
+                return retval;
+
+        if (buf[1] != PAGE_80) {
+                log_debug("%s: Invalid page 0x80", dev_scsi->kernel);
+                return 1;
+        }
+
+        len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3];
+        if (max_len < len) {
+                log_debug("%s: length %d too short - need %d",
+                          dev_scsi->kernel, max_len, len);
+                return 1;
+        }
+        /*
+         * Prepend 'S' to avoid unlikely collision with page 0x83 vendor
+         * specific type where we prepend '0' + vendor + model.
+         */
+        len = buf[3];
+        if (serial != NULL) {
+                serial[0] = 'S';
+                ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]);
+                if (ser_ind < 0)
+                        return 1;
+                ser_ind++; /* for the leading 'S' */
+                for (i = 4; i < len + 4; i++, ser_ind++)
+                        serial[ser_ind] = buf[i];
+        }
+        if (serial_short != NULL) {
+                memcpy(serial_short, &buf[4], len);
+                serial_short[len] = '\0';
+        }
+        return 0;
+}
+
+int scsi_std_inquiry(struct udev *udev,
+                     struct scsi_id_device *dev_scsi, const char *devname)
+{
+        int fd;
+        unsigned char buf[SCSI_INQ_BUFF_LEN];
+        struct stat statbuf;
+        int err = 0;
+
+        fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
+        if (fd < 0) {
+                log_debug_errno(errno, "scsi_id: cannot open %s: %m", devname);
+                return 1;
+        }
+
+        if (fstat(fd, &statbuf) < 0) {
+                log_debug_errno(errno, "scsi_id: cannot stat %s: %m", devname);
+                err = 2;
+                goto out;
+        }
+        sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev),
+                minor(statbuf.st_rdev));
+
+        memzero(buf, SCSI_INQ_BUFF_LEN);
+        err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN);
+        if (err < 0)
+                goto out;
+
+        err = 0;
+        memcpy(dev_scsi->vendor, buf + 8, 8);
+        dev_scsi->vendor[8] = '\0';
+        memcpy(dev_scsi->model, buf + 16, 16);
+        dev_scsi->model[16] = '\0';
+        memcpy(dev_scsi->revision, buf + 32, 4);
+        dev_scsi->revision[4] = '\0';
+        sprintf(dev_scsi->type,"%x", buf[0] & 0x1f);
+
+out:
+        close(fd);
+        return err;
+}
+
+int scsi_get_serial(struct udev *udev,
+                    struct scsi_id_device *dev_scsi, const char *devname,
+                    int page_code, int len)
+{
+        unsigned char page0[SCSI_INQ_BUFF_LEN];
+        int fd = -1;
+        int cnt;
+        int ind;
+        int retval;
+
+        memzero(dev_scsi->serial, len);
+        initialize_srand();
+        for (cnt = 20; cnt > 0; cnt--) {
+                struct timespec duration;
+
+                fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
+                if (fd >= 0 || errno != EBUSY)
+                        break;
+                duration.tv_sec = 0;
+                duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
+                nanosleep(&duration, NULL);
+        }
+        if (fd < 0)
+                return 1;
+
+        if (page_code == PAGE_80) {
+                if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) {
+                        retval = 1;
+                        goto completed;
+                } else  {
+                        retval = 0;
+                        goto completed;
+                }
+        } else if (page_code == PAGE_83) {
+                if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
+                        retval = 1;
+                        goto completed;
+                } else  {
+                        retval = 0;
+                        goto completed;
+                }
+        } else if (page_code == PAGE_83_PRE_SPC3) {
+                retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len);
+                if (retval) {
+                        /*
+                         * Fallback to servicing a SPC-2/3 compliant page 83
+                         * inquiry if the page 83 reply format does not
+                         * conform to pre-SPC3 expectations.
+                         */
+                        if (retval == 2) {
+                                if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
+                                        retval = 1;
+                                        goto completed;
+                                } else  {
+                                        retval = 0;
+                                        goto completed;
+                                }
+                        }
+                        else {
+                                retval = 1;
+                                goto completed;
+                        }
+                } else  {
+                        retval = 0;
+                        goto completed;
+                }
+        } else if (page_code != 0x00) {
+                log_debug("%s: unsupported page code 0x%d", dev_scsi->kernel, page_code);
+                retval = 1;
+                goto completed;
+        }
+
+        /*
+         * Get page 0, the page of the pages. By default, try from best to
+         * worst of supported pages: 0x83 then 0x80.
+         */
+        if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) {
+                /*
+                 * Don't try anything else. Black list if a specific page
+                 * should be used for this vendor+model, or maybe have an
+                 * optional fall-back to page 0x80 or page 0x83.
+                 */
+                retval = 1;
+                goto completed;
+        }
+
+        for (ind = 4; ind <= page0[3] + 3; ind++)
+                if (page0[ind] == PAGE_83)
+                        if (!do_scsi_page83_inquiry(udev, dev_scsi, fd,
+                                                    dev_scsi->serial, dev_scsi->serial_short, len, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) {
+                                /*
+                                 * Success
+                                 */
+                                retval = 0;
+                                goto completed;
+                        }
+
+        for (ind = 4; ind <= page0[3] + 3; ind++)
+                if (page0[ind] == PAGE_80)
+                        if (!do_scsi_page80_inquiry(udev, dev_scsi, fd,
+                                                    dev_scsi->serial, dev_scsi->serial_short, len)) {
+                                /*
+                                 * Success
+                                 */
+                                retval = 0;
+                                goto completed;
+                        }
+        retval = 1;
+
+completed:
+        close(fd);
+        return retval;
+}
diff --git a/src/grp-udev/systemd-udevd/Makefile b/src/grp-udev/systemd-udevd/Makefile
new file mode 100644
index 0000000000..5bbc548cfe
--- /dev/null
+++ b/src/grp-udev/systemd-udevd/Makefile
@@ -0,0 +1,35 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+rootlibexec_PROGRAMS += \
+	systemd-udevd
+
+systemd_udevd_SOURCES = \
+	src/udev/udevd.c
+
+systemd_udevd_LDADD = \
+	libudev-core.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/systemd-udevd/udevd.c b/src/grp-udev/systemd-udevd/udevd.c
new file mode 100644
index 0000000000..89006e6e3a
--- /dev/null
+++ b/src/grp-udev/systemd-udevd/udevd.c
@@ -0,0 +1,1765 @@
+/*
+ * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/file.h>
+#include <sys/inotify.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <sys/prctl.h>
+#include <sys/signalfd.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <systemd/sd-daemon.h>
+#include <systemd/sd-event.h>
+
+#include "alloc-util.h"
+#include "cgroup-util.h"
+#include "cpu-set-util.h"
+#include "dev-setup.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "formats-util.h"
+#include "fs-util.h"
+#include "hashmap.h"
+#include "io-util.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+#include "selinux-util.h"
+#include "signal-util.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "terminal-util.h"
+#include "udev-util.h"
+#include "udev.h"
+#include "user-util.h"
+
+static bool arg_debug = false;
+static int arg_daemonize = false;
+static int arg_resolve_names = 1;
+static unsigned arg_children_max;
+static int arg_exec_delay;
+static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC;
+static usec_t arg_event_timeout_warn_usec = 180 * USEC_PER_SEC / 3;
+
+typedef struct Manager {
+        struct udev *udev;
+        sd_event *event;
+        Hashmap *workers;
+        struct udev_list_node events;
+        const char *cgroup;
+        pid_t pid; /* the process that originally allocated the manager object */
+
+        struct udev_rules *rules;
+        struct udev_list properties;
+
+        struct udev_monitor *monitor;
+        struct udev_ctrl *ctrl;
+        struct udev_ctrl_connection *ctrl_conn_blocking;
+        int fd_inotify;
+        int worker_watch[2];
+
+        sd_event_source *ctrl_event;
+        sd_event_source *uevent_event;
+        sd_event_source *inotify_event;
+
+        usec_t last_usec;
+
+        bool stop_exec_queue:1;
+        bool exit:1;
+} Manager;
+
+enum event_state {
+        EVENT_UNDEF,
+        EVENT_QUEUED,
+        EVENT_RUNNING,
+};
+
+struct event {
+        struct udev_list_node node;
+        Manager *manager;
+        struct udev *udev;
+        struct udev_device *dev;
+        struct udev_device *dev_kernel;
+        struct worker *worker;
+        enum event_state state;
+        unsigned long long int delaying_seqnum;
+        unsigned long long int seqnum;
+        const char *devpath;
+        size_t devpath_len;
+        const char *devpath_old;
+        dev_t devnum;
+        int ifindex;
+        bool is_block;
+        sd_event_source *timeout_warning;
+        sd_event_source *timeout;
+};
+
+static inline struct event *node_to_event(struct udev_list_node *node) {
+        return container_of(node, struct event, node);
+}
+
+static void event_queue_cleanup(Manager *manager, enum event_state type);
+
+enum worker_state {
+        WORKER_UNDEF,
+        WORKER_RUNNING,
+        WORKER_IDLE,
+        WORKER_KILLED,
+};
+
+struct worker {
+        Manager *manager;
+        struct udev_list_node node;
+        int refcount;
+        pid_t pid;
+        struct udev_monitor *monitor;
+        enum worker_state state;
+        struct event *event;
+};
+
+/* passed from worker to main process */
+struct worker_message {
+};
+
+static void event_free(struct event *event) {
+        int r;
+
+        if (!event)
+                return;
+
+        udev_list_node_remove(&event->node);
+        udev_device_unref(event->dev);
+        udev_device_unref(event->dev_kernel);
+
+        sd_event_source_unref(event->timeout_warning);
+        sd_event_source_unref(event->timeout);
+
+        if (event->worker)
+                event->worker->event = NULL;
+
+        assert(event->manager);
+
+        if (udev_list_node_is_empty(&event->manager->events)) {
+                /* only clean up the queue from the process that created it */
+                if (event->manager->pid == getpid()) {
+                        r = unlink("/run/udev/queue");
+                        if (r < 0)
+                                log_warning_errno(errno, "could not unlink /run/udev/queue: %m");
+                }
+        }
+
+        free(event);
+}
+
+static void worker_free(struct worker *worker) {
+        if (!worker)
+                return;
+
+        assert(worker->manager);
+
+        hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid));
+        udev_monitor_unref(worker->monitor);
+        event_free(worker->event);
+
+        free(worker);
+}
+
+static void manager_workers_free(Manager *manager) {
+        struct worker *worker;
+        Iterator i;
+
+        assert(manager);
+
+        HASHMAP_FOREACH(worker, manager->workers, i)
+                worker_free(worker);
+
+        manager->workers = hashmap_free(manager->workers);
+}
+
+static int worker_new(struct worker **ret, Manager *manager, struct udev_monitor *worker_monitor, pid_t pid) {
+        _cleanup_free_ struct worker *worker = NULL;
+        int r;
+
+        assert(ret);
+        assert(manager);
+        assert(worker_monitor);
+        assert(pid > 1);
+
+        worker = new0(struct worker, 1);
+        if (!worker)
+                return -ENOMEM;
+
+        worker->refcount = 1;
+        worker->manager = manager;
+        /* close monitor, but keep address around */
+        udev_monitor_disconnect(worker_monitor);
+        worker->monitor = udev_monitor_ref(worker_monitor);
+        worker->pid = pid;
+
+        r = hashmap_ensure_allocated(&manager->workers, NULL);
+        if (r < 0)
+                return r;
+
+        r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker);
+        if (r < 0)
+                return r;
+
+        *ret = worker;
+        worker = NULL;
+
+        return 0;
+}
+
+static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
+        struct event *event = userdata;
+
+        assert(event);
+        assert(event->worker);
+
+        kill_and_sigcont(event->worker->pid, SIGKILL);
+        event->worker->state = WORKER_KILLED;
+
+        log_error("seq %llu '%s' killed", udev_device_get_seqnum(event->dev), event->devpath);
+
+        return 1;
+}
+
+static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) {
+        struct event *event = userdata;
+
+        assert(event);
+
+        log_warning("seq %llu '%s' is taking a long time", udev_device_get_seqnum(event->dev), event->devpath);
+
+        return 1;
+}
+
+static void worker_attach_event(struct worker *worker, struct event *event) {
+        sd_event *e;
+        uint64_t usec;
+
+        assert(worker);
+        assert(worker->manager);
+        assert(event);
+        assert(!event->worker);
+        assert(!worker->event);
+
+        worker->state = WORKER_RUNNING;
+        worker->event = event;
+        event->state = EVENT_RUNNING;
+        event->worker = worker;
+
+        e = worker->manager->event;
+
+        assert_se(sd_event_now(e, clock_boottime_or_monotonic(), &usec) >= 0);
+
+        (void) sd_event_add_time(e, &event->timeout_warning, clock_boottime_or_monotonic(),
+                                 usec + arg_event_timeout_warn_usec, USEC_PER_SEC, on_event_timeout_warning, event);
+
+        (void) sd_event_add_time(e, &event->timeout, clock_boottime_or_monotonic(),
+                                 usec + arg_event_timeout_usec, USEC_PER_SEC, on_event_timeout, event);
+}
+
+static void manager_free(Manager *manager) {
+        if (!manager)
+                return;
+
+        udev_builtin_exit(manager->udev);
+
+        sd_event_source_unref(manager->ctrl_event);
+        sd_event_source_unref(manager->uevent_event);
+        sd_event_source_unref(manager->inotify_event);
+
+        udev_unref(manager->udev);
+        sd_event_unref(manager->event);
+        manager_workers_free(manager);
+        event_queue_cleanup(manager, EVENT_UNDEF);
+
+        udev_monitor_unref(manager->monitor);
+        udev_ctrl_unref(manager->ctrl);
+        udev_ctrl_connection_unref(manager->ctrl_conn_blocking);
+
+        udev_list_cleanup(&manager->properties);
+        udev_rules_unref(manager->rules);
+
+        safe_close(manager->fd_inotify);
+        safe_close_pair(manager->worker_watch);
+
+        free(manager);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
+
+static int worker_send_message(int fd) {
+        struct worker_message message = {};
+
+        return loop_write(fd, &message, sizeof(message), false);
+}
+
+static void worker_spawn(Manager *manager, struct event *event) {
+        struct udev *udev = event->udev;
+        _cleanup_udev_monitor_unref_ struct udev_monitor *worker_monitor = NULL;
+        pid_t pid;
+        int r = 0;
+
+        /* listen for new events */
+        worker_monitor = udev_monitor_new_from_netlink(udev, NULL);
+        if (worker_monitor == NULL)
+                return;
+        /* allow the main daemon netlink address to send devices to the worker */
+        udev_monitor_allow_unicast_sender(worker_monitor, manager->monitor);
+        r = udev_monitor_enable_receiving(worker_monitor);
+        if (r < 0)
+                log_error_errno(r, "worker: could not enable receiving of device: %m");
+
+        pid = fork();
+        switch (pid) {
+        case 0: {
+                struct udev_device *dev = NULL;
+                _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
+                int fd_monitor;
+                _cleanup_close_ int fd_signal = -1, fd_ep = -1;
+                struct epoll_event ep_signal = { .events = EPOLLIN };
+                struct epoll_event ep_monitor = { .events = EPOLLIN };
+                sigset_t mask;
+
+                /* take initial device from queue */
+                dev = event->dev;
+                event->dev = NULL;
+
+                unsetenv("NOTIFY_SOCKET");
+
+                manager_workers_free(manager);
+                event_queue_cleanup(manager, EVENT_UNDEF);
+
+                manager->monitor = udev_monitor_unref(manager->monitor);
+                manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking);
+                manager->ctrl = udev_ctrl_unref(manager->ctrl);
+                manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking);
+                manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]);
+
+                manager->ctrl_event = sd_event_source_unref(manager->ctrl_event);
+                manager->uevent_event = sd_event_source_unref(manager->uevent_event);
+                manager->inotify_event = sd_event_source_unref(manager->inotify_event);
+
+                manager->event = sd_event_unref(manager->event);
+
+                sigfillset(&mask);
+                fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
+                if (fd_signal < 0) {
+                        r = log_error_errno(errno, "error creating signalfd %m");
+                        goto out;
+                }
+                ep_signal.data.fd = fd_signal;
+
+                fd_monitor = udev_monitor_get_fd(worker_monitor);
+                ep_monitor.data.fd = fd_monitor;
+
+                fd_ep = epoll_create1(EPOLL_CLOEXEC);
+                if (fd_ep < 0) {
+                        r = log_error_errno(errno, "error creating epoll fd: %m");
+                        goto out;
+                }
+
+                if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||
+                    epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) {
+                        r = log_error_errno(errno, "fail to add fds to epoll: %m");
+                        goto out;
+                }
+
+                /* Request TERM signal if parent exits.
+                   Ignore error, not much we can do in that case. */
+                (void) prctl(PR_SET_PDEATHSIG, SIGTERM);
+
+                /* Reset OOM score, we only protect the main daemon. */
+                write_string_file("/proc/self/oom_score_adj", "0", 0);
+
+                for (;;) {
+                        struct udev_event *udev_event;
+                        int fd_lock = -1;
+
+                        assert(dev);
+
+                        log_debug("seq %llu running", udev_device_get_seqnum(dev));
+                        udev_event = udev_event_new(dev);
+                        if (udev_event == NULL) {
+                                r = -ENOMEM;
+                                goto out;
+                        }
+
+                        if (arg_exec_delay > 0)
+                                udev_event->exec_delay = arg_exec_delay;
+
+                        /*
+                         * Take a shared lock on the device node; this establishes
+                         * a concept of device "ownership" to serialize device
+                         * access. External processes holding an exclusive lock will
+                         * cause udev to skip the event handling; in the case udev
+                         * acquired the lock, the external process can block until
+                         * udev has finished its event handling.
+                         */
+                        if (!streq_ptr(udev_device_get_action(dev), "remove") &&
+                            streq_ptr("block", udev_device_get_subsystem(dev)) &&
+                            !startswith(udev_device_get_sysname(dev), "dm-") &&
+                            !startswith(udev_device_get_sysname(dev), "md")) {
+                                struct udev_device *d = dev;
+
+                                if (streq_ptr("partition", udev_device_get_devtype(d)))
+                                        d = udev_device_get_parent(d);
+
+                                if (d) {
+                                        fd_lock = open(udev_device_get_devnode(d), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
+                                        if (fd_lock >= 0 && flock(fd_lock, LOCK_SH|LOCK_NB) < 0) {
+                                                log_debug_errno(errno, "Unable to flock(%s), skipping event handling: %m", udev_device_get_devnode(d));
+                                                fd_lock = safe_close(fd_lock);
+                                                goto skip;
+                                        }
+                                }
+                        }
+
+                        /* needed for renaming netifs */
+                        udev_event->rtnl = rtnl;
+
+                        /* apply rules, create node, symlinks */
+                        udev_event_execute_rules(udev_event,
+                                                 arg_event_timeout_usec, arg_event_timeout_warn_usec,
+                                                 &manager->properties,
+                                                 manager->rules);
+
+                        udev_event_execute_run(udev_event,
+                                               arg_event_timeout_usec, arg_event_timeout_warn_usec);
+
+                        if (udev_event->rtnl)
+                                /* in case rtnl was initialized */
+                                rtnl = sd_netlink_ref(udev_event->rtnl);
+
+                        /* apply/restore inotify watch */
+                        if (udev_event->inotify_watch) {
+                                udev_watch_begin(udev, dev);
+                                udev_device_update_db(dev);
+                        }
+
+                        safe_close(fd_lock);
+
+                        /* send processed event back to libudev listeners */
+                        udev_monitor_send_device(worker_monitor, NULL, dev);
+
+skip:
+                        log_debug("seq %llu processed", udev_device_get_seqnum(dev));
+
+                        /* send udevd the result of the event execution */
+                        r = worker_send_message(manager->worker_watch[WRITE_END]);
+                        if (r < 0)
+                                log_error_errno(r, "failed to send result of seq %llu to main daemon: %m",
+                                                udev_device_get_seqnum(dev));
+
+                        udev_device_unref(dev);
+                        dev = NULL;
+
+                        udev_event_unref(udev_event);
+
+                        /* wait for more device messages from main udevd, or term signal */
+                        while (dev == NULL) {
+                                struct epoll_event ev[4];
+                                int fdcount;
+                                int i;
+
+                                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
+                                if (fdcount < 0) {
+                                        if (errno == EINTR)
+                                                continue;
+                                        r = log_error_errno(errno, "failed to poll: %m");
+                                        goto out;
+                                }
+
+                                for (i = 0; i < fdcount; i++) {
+                                        if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {
+                                                dev = udev_monitor_receive_device(worker_monitor);
+                                                break;
+                                        } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) {
+                                                struct signalfd_siginfo fdsi;
+                                                ssize_t size;
+
+                                                size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
+                                                if (size != sizeof(struct signalfd_siginfo))
+                                                        continue;
+                                                switch (fdsi.ssi_signo) {
+                                                case SIGTERM:
+                                                        goto out;
+                                                }
+                                        }
+                                }
+                        }
+                }
+out:
+                udev_device_unref(dev);
+                manager_free(manager);
+                log_close();
+                _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+        }
+        case -1:
+                event->state = EVENT_QUEUED;
+                log_error_errno(errno, "fork of child failed: %m");
+                break;
+        default:
+        {
+                struct worker *worker;
+
+                r = worker_new(&worker, manager, worker_monitor, pid);
+                if (r < 0)
+                        return;
+
+                worker_attach_event(worker, event);
+
+                log_debug("seq %llu forked new worker ["PID_FMT"]", udev_device_get_seqnum(event->dev), pid);
+                break;
+        }
+        }
+}
+
+static void event_run(Manager *manager, struct event *event) {
+        struct worker *worker;
+        Iterator i;
+
+        assert(manager);
+        assert(event);
+
+        HASHMAP_FOREACH(worker, manager->workers, i) {
+                ssize_t count;
+
+                if (worker->state != WORKER_IDLE)
+                        continue;
+
+                count = udev_monitor_send_device(manager->monitor, worker->monitor, event->dev);
+                if (count < 0) {
+                        log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",
+                                        worker->pid, count);
+                        kill(worker->pid, SIGKILL);
+                        worker->state = WORKER_KILLED;
+                        continue;
+                }
+                worker_attach_event(worker, event);
+                return;
+        }
+
+        if (hashmap_size(manager->workers) >= arg_children_max) {
+                if (arg_children_max > 1)
+                        log_debug("maximum number (%i) of children reached", hashmap_size(manager->workers));
+                return;
+        }
+
+        /* start new worker and pass initial device */
+        worker_spawn(manager, event);
+}
+
+static int event_queue_insert(Manager *manager, struct udev_device *dev) {
+        struct event *event;
+        int r;
+
+        assert(manager);
+        assert(dev);
+
+        /* only one process can add events to the queue */
+        if (manager->pid == 0)
+                manager->pid = getpid();
+
+        assert(manager->pid == getpid());
+
+        event = new0(struct event, 1);
+        if (!event)
+                return -ENOMEM;
+
+        event->udev = udev_device_get_udev(dev);
+        event->manager = manager;
+        event->dev = dev;
+        event->dev_kernel = udev_device_shallow_clone(dev);
+        udev_device_copy_properties(event->dev_kernel, dev);
+        event->seqnum = udev_device_get_seqnum(dev);
+        event->devpath = udev_device_get_devpath(dev);
+        event->devpath_len = strlen(event->devpath);
+        event->devpath_old = udev_device_get_devpath_old(dev);
+        event->devnum = udev_device_get_devnum(dev);
+        event->is_block = streq("block", udev_device_get_subsystem(dev));
+        event->ifindex = udev_device_get_ifindex(dev);
+
+        log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),
+             udev_device_get_action(dev), udev_device_get_subsystem(dev));
+
+        event->state = EVENT_QUEUED;
+
+        if (udev_list_node_is_empty(&manager->events)) {
+                r = touch("/run/udev/queue");
+                if (r < 0)
+                        log_warning_errno(r, "could not touch /run/udev/queue: %m");
+        }
+
+        udev_list_node_append(&event->node, &manager->events);
+
+        return 0;
+}
+
+static void manager_kill_workers(Manager *manager) {
+        struct worker *worker;
+        Iterator i;
+
+        assert(manager);
+
+        HASHMAP_FOREACH(worker, manager->workers, i) {
+                if (worker->state == WORKER_KILLED)
+                        continue;
+
+                worker->state = WORKER_KILLED;
+                kill(worker->pid, SIGTERM);
+        }
+}
+
+/* lookup event for identical, parent, child device */
+static bool is_devpath_busy(Manager *manager, struct event *event) {
+        struct udev_list_node *loop;
+        size_t common;
+
+        /* check if queue contains events we depend on */
+        udev_list_node_foreach(loop, &manager->events) {
+                struct event *loop_event = node_to_event(loop);
+
+                /* we already found a later event, earlier can not block us, no need to check again */
+                if (loop_event->seqnum < event->delaying_seqnum)
+                        continue;
+
+                /* event we checked earlier still exists, no need to check again */
+                if (loop_event->seqnum == event->delaying_seqnum)
+                        return true;
+
+                /* found ourself, no later event can block us */
+                if (loop_event->seqnum >= event->seqnum)
+                        break;
+
+                /* check major/minor */
+                if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)
+                        return true;
+
+                /* check network device ifindex */
+                if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)
+                        return true;
+
+                /* check our old name */
+                if (event->devpath_old != NULL && streq(loop_event->devpath, event->devpath_old)) {
+                        event->delaying_seqnum = loop_event->seqnum;
+                        return true;
+                }
+
+                /* compare devpath */
+                common = MIN(loop_event->devpath_len, event->devpath_len);
+
+                /* one devpath is contained in the other? */
+                if (memcmp(loop_event->devpath, event->devpath, common) != 0)
+                        continue;
+
+                /* identical device event found */
+                if (loop_event->devpath_len == event->devpath_len) {
+                        /* devices names might have changed/swapped in the meantime */
+                        if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block))
+                                continue;
+                        if (event->ifindex != 0 && event->ifindex != loop_event->ifindex)
+                                continue;
+                        event->delaying_seqnum = loop_event->seqnum;
+                        return true;
+                }
+
+                /* parent device event found */
+                if (event->devpath[common] == '/') {
+                        event->delaying_seqnum = loop_event->seqnum;
+                        return true;
+                }
+
+                /* child device event found */
+                if (loop_event->devpath[common] == '/') {
+                        event->delaying_seqnum = loop_event->seqnum;
+                        return true;
+                }
+
+                /* no matching device */
+                continue;
+        }
+
+        return false;
+}
+
+static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
+        Manager *manager = userdata;
+
+        assert(manager);
+
+        log_error_errno(ETIMEDOUT, "giving up waiting for workers to finish");
+
+        sd_event_exit(manager->event, -ETIMEDOUT);
+
+        return 1;
+}
+
+static void manager_exit(Manager *manager) {
+        uint64_t usec;
+        int r;
+
+        assert(manager);
+
+        manager->exit = true;
+
+        sd_notify(false,
+                  "STOPPING=1\n"
+                  "STATUS=Starting shutdown...");
+
+        /* close sources of new events and discard buffered events */
+        manager->ctrl_event = sd_event_source_unref(manager->ctrl_event);
+        manager->ctrl = udev_ctrl_unref(manager->ctrl);
+
+        manager->inotify_event = sd_event_source_unref(manager->inotify_event);
+        manager->fd_inotify = safe_close(manager->fd_inotify);
+
+        manager->uevent_event = sd_event_source_unref(manager->uevent_event);
+        manager->monitor = udev_monitor_unref(manager->monitor);
+
+        /* discard queued events and kill workers */
+        event_queue_cleanup(manager, EVENT_QUEUED);
+        manager_kill_workers(manager);
+
+        assert_se(sd_event_now(manager->event, clock_boottime_or_monotonic(), &usec) >= 0);
+
+        r = sd_event_add_time(manager->event, NULL, clock_boottime_or_monotonic(),
+                              usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager);
+        if (r < 0)
+                return;
+}
+
+/* reload requested, HUP signal received, rules changed, builtin changed */
+static void manager_reload(Manager *manager) {
+
+        assert(manager);
+
+        sd_notify(false,
+                  "RELOADING=1\n"
+                  "STATUS=Flushing configuration...");
+
+        manager_kill_workers(manager);
+        manager->rules = udev_rules_unref(manager->rules);
+        udev_builtin_exit(manager->udev);
+
+        sd_notify(false,
+                  "READY=1\n"
+                  "STATUS=Processing...");
+}
+
+static void event_queue_start(Manager *manager) {
+        struct udev_list_node *loop;
+        usec_t usec;
+
+        assert(manager);
+
+        if (udev_list_node_is_empty(&manager->events) ||
+            manager->exit || manager->stop_exec_queue)
+                return;
+
+        assert_se(sd_event_now(manager->event, clock_boottime_or_monotonic(), &usec) >= 0);
+        /* check for changed config, every 3 seconds at most */
+        if (manager->last_usec == 0 ||
+            (usec - manager->last_usec) > 3 * USEC_PER_SEC) {
+                if (udev_rules_check_timestamp(manager->rules) ||
+                    udev_builtin_validate(manager->udev))
+                        manager_reload(manager);
+
+                manager->last_usec = usec;
+        }
+
+        udev_builtin_init(manager->udev);
+
+        if (!manager->rules) {
+                manager->rules = udev_rules_new(manager->udev, arg_resolve_names);
+                if (!manager->rules)
+                        return;
+        }
+
+        udev_list_node_foreach(loop, &manager->events) {
+                struct event *event = node_to_event(loop);
+
+                if (event->state != EVENT_QUEUED)
+                        continue;
+
+                /* do not start event if parent or child event is still running */
+                if (is_devpath_busy(manager, event))
+                        continue;
+
+                event_run(manager, event);
+        }
+}
+
+static void event_queue_cleanup(Manager *manager, enum event_state match_type) {
+        struct udev_list_node *loop, *tmp;
+
+        udev_list_node_foreach_safe(loop, tmp, &manager->events) {
+                struct event *event = node_to_event(loop);
+
+                if (match_type != EVENT_UNDEF && match_type != event->state)
+                        continue;
+
+                event_free(event);
+        }
+}
+
+static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        Manager *manager = userdata;
+
+        assert(manager);
+
+        for (;;) {
+                struct worker_message msg;
+                struct iovec iovec = {
+                        .iov_base = &msg,
+                        .iov_len = sizeof(msg),
+                };
+                union {
+                        struct cmsghdr cmsghdr;
+                        uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
+                } control = {};
+                struct msghdr msghdr = {
+                        .msg_iov = &iovec,
+                        .msg_iovlen = 1,
+                        .msg_control = &control,
+                        .msg_controllen = sizeof(control),
+                };
+                struct cmsghdr *cmsg;
+                ssize_t size;
+                struct ucred *ucred = NULL;
+                struct worker *worker;
+
+                size = recvmsg(fd, &msghdr, MSG_DONTWAIT);
+                if (size < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        else if (errno == EAGAIN)
+                                /* nothing more to read */
+                                break;
+
+                        return log_error_errno(errno, "failed to receive message: %m");
+                } else if (size != sizeof(struct worker_message)) {
+                        log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size);
+                        continue;
+                }
+
+                CMSG_FOREACH(cmsg, &msghdr) {
+                        if (cmsg->cmsg_level == SOL_SOCKET &&
+                            cmsg->cmsg_type == SCM_CREDENTIALS &&
+                            cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
+                                ucred = (struct ucred*) CMSG_DATA(cmsg);
+                }
+
+                if (!ucred || ucred->pid <= 0) {
+                        log_warning_errno(EIO, "ignoring worker message without valid PID");
+                        continue;
+                }
+
+                /* lookup worker who sent the signal */
+                worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid));
+                if (!worker) {
+                        log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid);
+                        continue;
+                }
+
+                if (worker->state != WORKER_KILLED)
+                        worker->state = WORKER_IDLE;
+
+                /* worker returned */
+                event_free(worker->event);
+        }
+
+        /* we have free workers, try to schedule events */
+        event_queue_start(manager);
+
+        return 1;
+}
+
+static int on_uevent(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        Manager *manager = userdata;
+        struct udev_device *dev;
+        int r;
+
+        assert(manager);
+
+        dev = udev_monitor_receive_device(manager->monitor);
+        if (dev) {
+                udev_device_ensure_usec_initialized(dev, NULL);
+                r = event_queue_insert(manager, dev);
+                if (r < 0)
+                        udev_device_unref(dev);
+                else
+                        /* we have fresh events, try to schedule them */
+                        event_queue_start(manager);
+        }
+
+        return 1;
+}
+
+/* receive the udevd message from userspace */
+static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        Manager *manager = userdata;
+        _cleanup_udev_ctrl_connection_unref_ struct udev_ctrl_connection *ctrl_conn = NULL;
+        _cleanup_udev_ctrl_msg_unref_ struct udev_ctrl_msg *ctrl_msg = NULL;
+        const char *str;
+        int i;
+
+        assert(manager);
+
+        ctrl_conn = udev_ctrl_get_connection(manager->ctrl);
+        if (!ctrl_conn)
+                return 1;
+
+        ctrl_msg = udev_ctrl_receive_msg(ctrl_conn);
+        if (!ctrl_msg)
+                return 1;
+
+        i = udev_ctrl_get_set_log_level(ctrl_msg);
+        if (i >= 0) {
+                log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i);
+                log_set_max_level(i);
+                manager_kill_workers(manager);
+        }
+
+        if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
+                log_debug("udevd message (STOP_EXEC_QUEUE) received");
+                manager->stop_exec_queue = true;
+        }
+
+        if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
+                log_debug("udevd message (START_EXEC_QUEUE) received");
+                manager->stop_exec_queue = false;
+                event_queue_start(manager);
+        }
+
+        if (udev_ctrl_get_reload(ctrl_msg) > 0) {
+                log_debug("udevd message (RELOAD) received");
+                manager_reload(manager);
+        }
+
+        str = udev_ctrl_get_set_env(ctrl_msg);
+        if (str != NULL) {
+                _cleanup_free_ char *key = NULL;
+
+                key = strdup(str);
+                if (key) {
+                        char *val;
+
+                        val = strchr(key, '=');
+                        if (val != NULL) {
+                                val[0] = '\0';
+                                val = &val[1];
+                                if (val[0] == '\0') {
+                                        log_debug("udevd message (ENV) received, unset '%s'", key);
+                                        udev_list_entry_add(&manager->properties, key, NULL);
+                                } else {
+                                        log_debug("udevd message (ENV) received, set '%s=%s'", key, val);
+                                        udev_list_entry_add(&manager->properties, key, val);
+                                }
+                        } else
+                                log_error("wrong key format '%s'", key);
+                }
+                manager_kill_workers(manager);
+        }
+
+        i = udev_ctrl_get_set_children_max(ctrl_msg);
+        if (i >= 0) {
+                log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i);
+                arg_children_max = i;
+        }
+
+        if (udev_ctrl_get_ping(ctrl_msg) > 0)
+                log_debug("udevd message (SYNC) received");
+
+        if (udev_ctrl_get_exit(ctrl_msg) > 0) {
+                log_debug("udevd message (EXIT) received");
+                manager_exit(manager);
+                /* keep reference to block the client until we exit
+                   TODO: deal with several blocking exit requests */
+                manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn);
+        }
+
+        return 1;
+}
+
+static int synthesize_change(struct udev_device *dev) {
+        char filename[UTIL_PATH_SIZE];
+        int r;
+
+        if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
+            streq_ptr("disk", udev_device_get_devtype(dev)) &&
+            !startswith(udev_device_get_sysname(dev), "dm-")) {
+                bool part_table_read = false;
+                bool has_partitions = false;
+                int fd;
+                struct udev *udev = udev_device_get_udev(dev);
+                _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
+                struct udev_list_entry *item;
+
+                /*
+                 * Try to re-read the partition table. This only succeeds if
+                 * none of the devices is busy. The kernel returns 0 if no
+                 * partition table is found, and we will not get an event for
+                 * the disk.
+                 */
+                fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
+                if (fd >= 0) {
+                        r = flock(fd, LOCK_EX|LOCK_NB);
+                        if (r >= 0)
+                                r = ioctl(fd, BLKRRPART, 0);
+
+                        close(fd);
+                        if (r >= 0)
+                                part_table_read = true;
+                }
+
+                /* search for partitions */
+                e = udev_enumerate_new(udev);
+                if (!e)
+                        return -ENOMEM;
+
+                r = udev_enumerate_add_match_parent(e, dev);
+                if (r < 0)
+                        return r;
+
+                r = udev_enumerate_add_match_subsystem(e, "block");
+                if (r < 0)
+                        return r;
+
+                r = udev_enumerate_scan_devices(e);
+                if (r < 0)
+                        return r;
+
+                udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
+                        _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+
+                        d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
+                        if (!d)
+                                continue;
+
+                        if (!streq_ptr("partition", udev_device_get_devtype(d)))
+                                continue;
+
+                        has_partitions = true;
+                        break;
+                }
+
+                /*
+                 * We have partitions and re-read the table, the kernel already sent
+                 * out a "change" event for the disk, and "remove/add" for all
+                 * partitions.
+                 */
+                if (part_table_read && has_partitions)
+                        return 0;
+
+                /*
+                 * We have partitions but re-reading the partition table did not
+                 * work, synthesize "change" for the disk and all partitions.
+                 */
+                log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
+                strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
+                write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
+
+                udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
+                        _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+
+                        d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
+                        if (!d)
+                                continue;
+
+                        if (!streq_ptr("partition", udev_device_get_devtype(d)))
+                                continue;
+
+                        log_debug("device %s closed, synthesising partition '%s' 'change'",
+                                  udev_device_get_devnode(dev), udev_device_get_devnode(d));
+                        strscpyl(filename, sizeof(filename), udev_device_get_syspath(d), "/uevent", NULL);
+                        write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
+                }
+
+                return 0;
+        }
+
+        log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
+        strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
+        write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
+
+        return 0;
+}
+
+static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+        Manager *manager = userdata;
+        union inotify_event_buffer buffer;
+        struct inotify_event *e;
+        ssize_t l;
+
+        assert(manager);
+
+        l = read(fd, &buffer, sizeof(buffer));
+        if (l < 0) {
+                if (errno == EAGAIN || errno == EINTR)
+                        return 1;
+
+                return log_error_errno(errno, "Failed to read inotify fd: %m");
+        }
+
+        FOREACH_INOTIFY_EVENT(e, buffer, l) {
+                _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
+
+                dev = udev_watch_lookup(manager->udev, e->wd);
+                if (!dev)
+                        continue;
+
+                log_debug("inotify event: %x for %s", e->mask, udev_device_get_devnode(dev));
+                if (e->mask & IN_CLOSE_WRITE) {
+                        synthesize_change(dev);
+
+                        /* settle might be waiting on us to determine the queue
+                         * state. If we just handled an inotify event, we might have
+                         * generated a "change" event, but we won't have queued up
+                         * the resultant uevent yet. Do that.
+                         */
+                        on_uevent(NULL, -1, 0, manager);
+                } else if (e->mask & IN_IGNORED)
+                        udev_watch_end(manager->udev, dev);
+        }
+
+        return 1;
+}
+
+static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        Manager *manager = userdata;
+
+        assert(manager);
+
+        manager_exit(manager);
+
+        return 1;
+}
+
+static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        Manager *manager = userdata;
+
+        assert(manager);
+
+        manager_reload(manager);
+
+        return 1;
+}
+
+static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        Manager *manager = userdata;
+
+        assert(manager);
+
+        for (;;) {
+                pid_t pid;
+                int status;
+                struct worker *worker;
+
+                pid = waitpid(-1, &status, WNOHANG);
+                if (pid <= 0)
+                        break;
+
+                worker = hashmap_get(manager->workers, PID_TO_PTR(pid));
+                if (!worker) {
+                        log_warning("worker ["PID_FMT"] is unknown, ignoring", pid);
+                        continue;
+                }
+
+                if (WIFEXITED(status)) {
+                        if (WEXITSTATUS(status) == 0)
+                                log_debug("worker ["PID_FMT"] exited", pid);
+                        else
+                                log_warning("worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status));
+                } else if (WIFSIGNALED(status)) {
+                        log_warning("worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
+                } else if (WIFSTOPPED(status)) {
+                        log_info("worker ["PID_FMT"] stopped", pid);
+                        continue;
+                } else if (WIFCONTINUED(status)) {
+                        log_info("worker ["PID_FMT"] continued", pid);
+                        continue;
+                } else
+                        log_warning("worker ["PID_FMT"] exit with status 0x%04x", pid, status);
+
+                if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+                        if (worker->event) {
+                                log_error("worker ["PID_FMT"] failed while handling '%s'", pid, worker->event->devpath);
+                                /* delete state from disk */
+                                udev_device_delete_db(worker->event->dev);
+                                udev_device_tag_index(worker->event->dev, NULL, false);
+                                /* forward kernel event without amending it */
+                                udev_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel);
+                        }
+                }
+
+                worker_free(worker);
+        }
+
+        /* we can start new workers, try to schedule events */
+        event_queue_start(manager);
+
+        return 1;
+}
+
+static int on_post(sd_event_source *s, void *userdata) {
+        Manager *manager = userdata;
+        int r;
+
+        assert(manager);
+
+        if (udev_list_node_is_empty(&manager->events)) {
+                /* no pending events */
+                if (!hashmap_isempty(manager->workers)) {
+                        /* there are idle workers */
+                        log_debug("cleanup idle workers");
+                        manager_kill_workers(manager);
+                } else {
+                        /* we are idle */
+                        if (manager->exit) {
+                                r = sd_event_exit(manager->event, 0);
+                                if (r < 0)
+                                        return r;
+                        } else if (manager->cgroup)
+                                /* cleanup possible left-over processes in our cgroup */
+                                cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, false, true, NULL);
+                }
+        }
+
+        return 1;
+}
+
+static int listen_fds(int *rctrl, int *rnetlink) {
+        _cleanup_udev_unref_ struct udev *udev = NULL;
+        int ctrl_fd = -1, netlink_fd = -1;
+        int fd, n, r;
+
+        assert(rctrl);
+        assert(rnetlink);
+
+        n = sd_listen_fds(true);
+        if (n < 0)
+                return n;
+
+        for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) {
+                if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1)) {
+                        if (ctrl_fd >= 0)
+                                return -EINVAL;
+                        ctrl_fd = fd;
+                        continue;
+                }
+
+                if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1)) {
+                        if (netlink_fd >= 0)
+                                return -EINVAL;
+                        netlink_fd = fd;
+                        continue;
+                }
+
+                return -EINVAL;
+        }
+
+        if (ctrl_fd < 0) {
+                _cleanup_udev_ctrl_unref_ struct udev_ctrl *ctrl = NULL;
+
+                udev = udev_new();
+                if (!udev)
+                        return -ENOMEM;
+
+                ctrl = udev_ctrl_new(udev);
+                if (!ctrl)
+                        return log_error_errno(EINVAL, "error initializing udev control socket");
+
+                r = udev_ctrl_enable_receiving(ctrl);
+                if (r < 0)
+                        return log_error_errno(EINVAL, "error binding udev control socket");
+
+                fd = udev_ctrl_get_fd(ctrl);
+                if (fd < 0)
+                        return log_error_errno(EIO, "could not get ctrl fd");
+
+                ctrl_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+                if (ctrl_fd < 0)
+                        return log_error_errno(errno, "could not dup ctrl fd: %m");
+        }
+
+        if (netlink_fd < 0) {
+                _cleanup_udev_monitor_unref_ struct udev_monitor *monitor = NULL;
+
+                if (!udev) {
+                        udev = udev_new();
+                        if (!udev)
+                                return -ENOMEM;
+                }
+
+                monitor = udev_monitor_new_from_netlink(udev, "kernel");
+                if (!monitor)
+                        return log_error_errno(EINVAL, "error initializing netlink socket");
+
+                (void) udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);
+
+                r = udev_monitor_enable_receiving(monitor);
+                if (r < 0)
+                        return log_error_errno(EINVAL, "error binding netlink socket");
+
+                fd = udev_monitor_get_fd(monitor);
+                if (fd < 0)
+                        return log_error_errno(netlink_fd, "could not get uevent fd: %m");
+
+                netlink_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+                if (ctrl_fd < 0)
+                        return log_error_errno(errno, "could not dup netlink fd: %m");
+        }
+
+        *rctrl = ctrl_fd;
+        *rnetlink = netlink_fd;
+
+        return 0;
+}
+
+/*
+ * read the kernel command line, in case we need to get into debug mode
+ *   udev.log-priority=<level>                 syslog priority
+ *   udev.children-max=<number of workers>     events are fully serialized if set to 1
+ *   udev.exec-delay=<number of seconds>       delay execution of every executed program
+ *   udev.event-timeout=<number of seconds>    seconds to wait before terminating an event
+ */
+static int parse_proc_cmdline_item(const char *key, const char *value) {
+        const char *full_key = key;
+        int r;
+
+        assert(key);
+
+        if (!value)
+                return 0;
+
+        if (startswith(key, "rd."))
+                key += strlen("rd.");
+
+        if (startswith(key, "udev."))
+                key += strlen("udev.");
+        else
+                return 0;
+
+        if (streq(key, "log-priority")) {
+                int prio;
+
+                prio = util_log_priority(value);
+                if (prio < 0)
+                        goto invalid;
+                log_set_max_level(prio);
+        } else if (streq(key, "children-max")) {
+                r = safe_atou(value, &arg_children_max);
+                if (r < 0)
+                        goto invalid;
+        } else if (streq(key, "exec-delay")) {
+                r = safe_atoi(value, &arg_exec_delay);
+                if (r < 0)
+                        goto invalid;
+        } else if (streq(key, "event-timeout")) {
+                r = safe_atou64(value, &arg_event_timeout_usec);
+                if (r < 0)
+                        goto invalid;
+                arg_event_timeout_usec *= USEC_PER_SEC;
+                arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
+        }
+
+        return 0;
+invalid:
+        log_warning("invalid %s ignored: %s", full_key, value);
+        return 0;
+}
+
+static void help(void) {
+        printf("%s [OPTIONS...]\n\n"
+               "Manages devices.\n\n"
+               "  -h --help                   Print this message\n"
+               "     --version                Print version of the program\n"
+               "     --daemon                 Detach and run in the background\n"
+               "     --debug                  Enable debug output\n"
+               "     --children-max=INT       Set maximum number of workers\n"
+               "     --exec-delay=SECONDS     Seconds to wait before executing RUN=\n"
+               "     --event-timeout=SECONDS  Seconds to wait before terminating an event\n"
+               "     --resolve-names=early|late|never\n"
+               "                              When to resolve users and groups\n"
+               , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+        static const struct option options[] = {
+                { "daemon",             no_argument,            NULL, 'd' },
+                { "debug",              no_argument,            NULL, 'D' },
+                { "children-max",       required_argument,      NULL, 'c' },
+                { "exec-delay",         required_argument,      NULL, 'e' },
+                { "event-timeout",      required_argument,      NULL, 't' },
+                { "resolve-names",      required_argument,      NULL, 'N' },
+                { "help",               no_argument,            NULL, 'h' },
+                { "version",            no_argument,            NULL, 'V' },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) {
+                int r;
+
+                switch (c) {
+
+                case 'd':
+                        arg_daemonize = true;
+                        break;
+                case 'c':
+                        r = safe_atou(optarg, &arg_children_max);
+                        if (r < 0)
+                                log_warning("Invalid --children-max ignored: %s", optarg);
+                        break;
+                case 'e':
+                        r = safe_atoi(optarg, &arg_exec_delay);
+                        if (r < 0)
+                                log_warning("Invalid --exec-delay ignored: %s", optarg);
+                        break;
+                case 't':
+                        r = safe_atou64(optarg, &arg_event_timeout_usec);
+                        if (r < 0)
+                                log_warning("Invalid --event-timeout ignored: %s", optarg);
+                        else {
+                                arg_event_timeout_usec *= USEC_PER_SEC;
+                                arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
+                        }
+                        break;
+                case 'D':
+                        arg_debug = true;
+                        break;
+                case 'N':
+                        if (streq(optarg, "early")) {
+                                arg_resolve_names = 1;
+                        } else if (streq(optarg, "late")) {
+                                arg_resolve_names = 0;
+                        } else if (streq(optarg, "never")) {
+                                arg_resolve_names = -1;
+                        } else {
+                                log_error("resolve-names must be early, late or never");
+                                return 0;
+                        }
+                        break;
+                case 'h':
+                        help();
+                        return 0;
+                case 'V':
+                        printf("%s\n", VERSION);
+                        return 0;
+                case '?':
+                        return -EINVAL;
+                default:
+                        assert_not_reached("Unhandled option");
+
+                }
+        }
+
+        return 1;
+}
+
+static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) {
+        _cleanup_(manager_freep) Manager *manager = NULL;
+        int r, fd_worker, one = 1;
+
+        assert(ret);
+        assert(fd_ctrl >= 0);
+        assert(fd_uevent >= 0);
+
+        manager = new0(Manager, 1);
+        if (!manager)
+                return log_oom();
+
+        manager->fd_inotify = -1;
+        manager->worker_watch[WRITE_END] = -1;
+        manager->worker_watch[READ_END] = -1;
+
+        manager->udev = udev_new();
+        if (!manager->udev)
+                return log_error_errno(errno, "could not allocate udev context: %m");
+
+        udev_builtin_init(manager->udev);
+
+        manager->rules = udev_rules_new(manager->udev, arg_resolve_names);
+        if (!manager->rules)
+                return log_error_errno(ENOMEM, "error reading rules");
+
+        udev_list_node_init(&manager->events);
+        udev_list_init(manager->udev, &manager->properties, true);
+
+        manager->cgroup = cgroup;
+
+        manager->ctrl = udev_ctrl_new_from_fd(manager->udev, fd_ctrl);
+        if (!manager->ctrl)
+                return log_error_errno(EINVAL, "error taking over udev control socket");
+
+        manager->monitor = udev_monitor_new_from_netlink_fd(manager->udev, "kernel", fd_uevent);
+        if (!manager->monitor)
+                return log_error_errno(EINVAL, "error taking over netlink socket");
+
+        /* unnamed socket from workers to the main daemon */
+        r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch);
+        if (r < 0)
+                return log_error_errno(errno, "error creating socketpair: %m");
+
+        fd_worker = manager->worker_watch[READ_END];
+
+        r = setsockopt(fd_worker, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+        if (r < 0)
+                return log_error_errno(errno, "could not enable SO_PASSCRED: %m");
+
+        manager->fd_inotify = udev_watch_init(manager->udev);
+        if (manager->fd_inotify < 0)
+                return log_error_errno(ENOMEM, "error initializing inotify");
+
+        udev_watch_restore(manager->udev);
+
+        /* block and listen to all signals on signalfd */
+        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0);
+
+        r = sd_event_default(&manager->event);
+        if (r < 0)
+                return log_error_errno(r, "could not allocate event loop: %m");
+
+        r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating sigint event source: %m");
+
+        r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating sigterm event source: %m");
+
+        r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating sighup event source: %m");
+
+        r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating sigchld event source: %m");
+
+        r = sd_event_set_watchdog(manager->event, true);
+        if (r < 0)
+                return log_error_errno(r, "error creating watchdog event source: %m");
+
+        r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLIN, on_ctrl_msg, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating ctrl event source: %m");
+
+        /* This needs to be after the inotify and uevent handling, to make sure
+         * that the ping is send back after fully processing the pending uevents
+         * (including the synthetic ones we may create due to inotify events).
+         */
+        r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE);
+        if (r < 0)
+                return log_error_errno(r, "cold not set IDLE event priority for ctrl event source: %m");
+
+        r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating inotify event source: %m");
+
+        r = sd_event_add_io(manager->event, &manager->uevent_event, fd_uevent, EPOLLIN, on_uevent, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating uevent event source: %m");
+
+        r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating worker event source: %m");
+
+        r = sd_event_add_post(manager->event, NULL, on_post, manager);
+        if (r < 0)
+                return log_error_errno(r, "error creating post event source: %m");
+
+        *ret = manager;
+        manager = NULL;
+
+        return 0;
+}
+
+static int run(int fd_ctrl, int fd_uevent, const char *cgroup) {
+        _cleanup_(manager_freep) Manager *manager = NULL;
+        int r;
+
+        r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup);
+        if (r < 0) {
+                r = log_error_errno(r, "failed to allocate manager object: %m");
+                goto exit;
+        }
+
+        r = udev_rules_apply_static_dev_perms(manager->rules);
+        if (r < 0)
+                log_error_errno(r, "failed to apply permissions on static device nodes: %m");
+
+        (void) sd_notify(false,
+                         "READY=1\n"
+                         "STATUS=Processing...");
+
+        r = sd_event_loop(manager->event);
+        if (r < 0) {
+                log_error_errno(r, "event loop failed: %m");
+                goto exit;
+        }
+
+        sd_event_get_exit_code(manager->event, &r);
+
+exit:
+        sd_notify(false,
+                  "STOPPING=1\n"
+                  "STATUS=Shutting down...");
+        if (manager)
+                udev_ctrl_cleanup(manager->ctrl);
+        return r;
+}
+
+int main(int argc, char *argv[]) {
+        _cleanup_free_ char *cgroup = NULL;
+        int fd_ctrl = -1, fd_uevent = -1;
+        int r;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto exit;
+
+        r = parse_proc_cmdline(parse_proc_cmdline_item);
+        if (r < 0)
+                log_warning_errno(r, "failed to parse kernel command line, ignoring: %m");
+
+        if (arg_debug) {
+                log_set_target(LOG_TARGET_CONSOLE);
+                log_set_max_level(LOG_DEBUG);
+        }
+
+        if (getuid() != 0) {
+                r = log_error_errno(EPERM, "root privileges required");
+                goto exit;
+        }
+
+        if (arg_children_max == 0) {
+                cpu_set_t cpu_set;
+
+                arg_children_max = 8;
+
+                if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) == 0)
+                        arg_children_max += CPU_COUNT(&cpu_set) * 2;
+
+                log_debug("set children_max to %u", arg_children_max);
+        }
+
+        /* set umask before creating any file/directory */
+        r = chdir("/");
+        if (r < 0) {
+                r = log_error_errno(errno, "could not change dir to /: %m");
+                goto exit;
+        }
+
+        umask(022);
+
+        r = mac_selinux_init();
+        if (r < 0) {
+                log_error_errno(r, "could not initialize labelling: %m");
+                goto exit;
+        }
+
+        r = mkdir("/run/udev", 0755);
+        if (r < 0 && errno != EEXIST) {
+                r = log_error_errno(errno, "could not create /run/udev: %m");
+                goto exit;
+        }
+
+        dev_setup(NULL, UID_INVALID, GID_INVALID);
+
+        if (getppid() == 1) {
+                /* get our own cgroup, we regularly kill everything udev has left behind
+                   we only do this on systemd systems, and only if we are directly spawned
+                   by PID1. otherwise we are not guaranteed to have a dedicated cgroup */
+                r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup);
+                if (r < 0) {
+                        if (r == -ENOENT || r == -ENOMEDIUM)
+                                log_debug_errno(r, "did not find dedicated cgroup: %m");
+                        else
+                                log_warning_errno(r, "failed to get cgroup: %m");
+                }
+        }
+
+        r = listen_fds(&fd_ctrl, &fd_uevent);
+        if (r < 0) {
+                r = log_error_errno(r, "could not listen on fds: %m");
+                goto exit;
+        }
+
+        if (arg_daemonize) {
+                pid_t pid;
+
+                log_info("starting version " VERSION);
+
+                /* connect /dev/null to stdin, stdout, stderr */
+                if (log_get_max_level() < LOG_DEBUG)
+                        (void) make_null_stdio();
+
+                pid = fork();
+                switch (pid) {
+                case 0:
+                        break;
+                case -1:
+                        r = log_error_errno(errno, "fork of daemon failed: %m");
+                        goto exit;
+                default:
+                        mac_selinux_finish();
+                        log_close();
+                        _exit(EXIT_SUCCESS);
+                }
+
+                setsid();
+
+                write_string_file("/proc/self/oom_score_adj", "-1000", 0);
+        }
+
+        r = run(fd_ctrl, fd_uevent, cgroup);
+
+exit:
+        mac_selinux_finish();
+        log_close();
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
diff --git a/src/grp-udev/udevadm/Makefile b/src/grp-udev/udevadm/Makefile
new file mode 100644
index 0000000000..ba3b466935
--- /dev/null
+++ b/src/grp-udev/udevadm/Makefile
@@ -0,0 +1,45 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+rootbin_PROGRAMS += \
+	udevadm
+
+udevadm_SOURCES = \
+	src/udev/udevadm.c \
+	src/udev/udevadm-info.c \
+	src/udev/udevadm-control.c \
+	src/udev/udevadm-monitor.c \
+	src/udev/udevadm-hwdb.c \
+	src/udev/udevadm-settle.c \
+	src/udev/udevadm-trigger.c \
+	src/udev/udevadm-test.c \
+	src/udev/udevadm-test-builtin.c \
+	src/udev/udevadm-util.c \
+	src/udev/udevadm-util.h
+
+udevadm_LDADD = \
+	libudev-core.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/udevadm/udevadm-control.c b/src/grp-udev/udevadm/udevadm-control.c
new file mode 100644
index 0000000000..989decbe95
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-control.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "udev-util.h"
+#include "udev.h"
+
+static void print_help(void) {
+        printf("%s control COMMAND\n\n"
+               "Control the udev daemon.\n\n"
+               "  -h --help                Show this help\n"
+               "     --version             Show package version\n"
+               "  -e --exit                Instruct the daemon to cleanup and exit\n"
+               "  -l --log-priority=LEVEL  Set the udev log level for the daemon\n"
+               "  -s --stop-exec-queue     Do not execute events, queue only\n"
+               "  -S --start-exec-queue    Execute events, flush queue\n"
+               "  -R --reload              Reload rules and databases\n"
+               "  -p --property=KEY=VALUE  Set a global property for all events\n"
+               "  -m --children-max=N      Maximum number of children\n"
+               "     --timeout=SECONDS     Maximum time to block for a reply\n"
+               , program_invocation_short_name);
+}
+
+static int adm_control(struct udev *udev, int argc, char *argv[]) {
+        _cleanup_udev_ctrl_unref_ struct udev_ctrl *uctrl = NULL;
+        int timeout = 60;
+        int rc = 1, c;
+
+        static const struct option options[] = {
+                { "exit",             no_argument,       NULL, 'e' },
+                { "log-priority",     required_argument, NULL, 'l' },
+                { "stop-exec-queue",  no_argument,       NULL, 's' },
+                { "start-exec-queue", no_argument,       NULL, 'S' },
+                { "reload",           no_argument,       NULL, 'R' },
+                { "reload-rules",     no_argument,       NULL, 'R' }, /* alias for -R */
+                { "property",         required_argument, NULL, 'p' },
+                { "env",              required_argument, NULL, 'p' }, /* alias for -p */
+                { "children-max",     required_argument, NULL, 'm' },
+                { "timeout",          required_argument, NULL, 't' },
+                { "help",             no_argument,       NULL, 'h' },
+                {}
+        };
+
+        if (getuid() != 0) {
+                fprintf(stderr, "root privileges required\n");
+                return 1;
+        }
+
+        uctrl = udev_ctrl_new(udev);
+        if (uctrl == NULL)
+                return 2;
+
+        while ((c = getopt_long(argc, argv, "el:sSRp:m:h", options, NULL)) >= 0)
+                switch (c) {
+                case 'e':
+                        if (udev_ctrl_send_exit(uctrl, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                case 'l': {
+                        int i;
+
+                        i = util_log_priority(optarg);
+                        if (i < 0) {
+                                fprintf(stderr, "invalid number '%s'\n", optarg);
+                                return rc;
+                        }
+                        if (udev_ctrl_send_set_log_level(uctrl, util_log_priority(optarg), timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                }
+                case 's':
+                        if (udev_ctrl_send_stop_exec_queue(uctrl, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                case 'S':
+                        if (udev_ctrl_send_start_exec_queue(uctrl, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                case 'R':
+                        if (udev_ctrl_send_reload(uctrl, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                case 'p':
+                        if (strchr(optarg, '=') == NULL) {
+                                fprintf(stderr, "expect <KEY>=<value> instead of '%s'\n", optarg);
+                                return rc;
+                        }
+                        if (udev_ctrl_send_set_env(uctrl, optarg, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                case 'm': {
+                        char *endp;
+                        int i;
+
+                        i = strtoul(optarg, &endp, 0);
+                        if (endp[0] != '\0' || i < 1) {
+                                fprintf(stderr, "invalid number '%s'\n", optarg);
+                                return rc;
+                        }
+                        if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0)
+                                rc = 2;
+                        else
+                                rc = 0;
+                        break;
+                }
+                case 't': {
+                        int seconds;
+
+                        seconds = atoi(optarg);
+                        if (seconds >= 0)
+                                timeout = seconds;
+                        else
+                                fprintf(stderr, "invalid timeout value\n");
+                        break;
+                }
+                case 'h':
+                        print_help();
+                        rc = 0;
+                        break;
+                }
+
+        if (optind < argc)
+                fprintf(stderr, "Extraneous argument: %s\n", argv[optind]);
+        else if (optind == 1)
+                fprintf(stderr, "Option missing\n");
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_control = {
+        .name = "control",
+        .cmd = adm_control,
+        .help = "Control the udev daemon",
+};
diff --git a/src/grp-udev/udevadm/udevadm-hwdb.c b/src/grp-udev/udevadm/udevadm-hwdb.c
new file mode 100644
index 0000000000..948ad0f5a5
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-hwdb.c
@@ -0,0 +1,692 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <ctype.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "hwdb-internal.h"
+#include "hwdb-util.h"
+#include "strbuf.h"
+#include "string-util.h"
+#include "udev.h"
+#include "util.h"
+
+/*
+ * Generic udev properties, key/value database based on modalias strings.
+ * Uses a Patricia/radix trie to index all matches for efficient lookup.
+ */
+
+static const char * const conf_file_dirs[] = {
+        "/etc/udev/hwdb.d",
+        UDEVLIBEXECDIR "/hwdb.d",
+        NULL
+};
+
+/* in-memory trie objects */
+struct trie {
+        struct trie_node *root;
+        struct strbuf *strings;
+
+        size_t nodes_count;
+        size_t children_count;
+        size_t values_count;
+};
+
+struct trie_node {
+        /* prefix, common part for all children of this node */
+        size_t prefix_off;
+
+        /* sorted array of pointers to children nodes */
+        struct trie_child_entry *children;
+        uint8_t children_count;
+
+        /* sorted array of key/value pairs */
+        struct trie_value_entry *values;
+        size_t values_count;
+};
+
+/* children array item with char (0-255) index */
+struct trie_child_entry {
+        uint8_t c;
+        struct trie_node *child;
+};
+
+/* value array item with key/value pairs */
+struct trie_value_entry {
+        size_t key_off;
+        size_t value_off;
+};
+
+static int trie_children_cmp(const void *v1, const void *v2) {
+        const struct trie_child_entry *n1 = v1;
+        const struct trie_child_entry *n2 = v2;
+
+        return n1->c - n2->c;
+}
+
+static int node_add_child(struct trie *trie, struct trie_node *node, struct trie_node *node_child, uint8_t c) {
+        struct trie_child_entry *child;
+
+        /* extend array, add new entry, sort for bisection */
+        child = realloc(node->children, (node->children_count + 1) * sizeof(struct trie_child_entry));
+        if (!child)
+                return -ENOMEM;
+
+        node->children = child;
+        trie->children_count++;
+        node->children[node->children_count].c = c;
+        node->children[node->children_count].child = node_child;
+        node->children_count++;
+        qsort(node->children, node->children_count, sizeof(struct trie_child_entry), trie_children_cmp);
+        trie->nodes_count++;
+
+        return 0;
+}
+
+static struct trie_node *node_lookup(const struct trie_node *node, uint8_t c) {
+        struct trie_child_entry *child;
+        struct trie_child_entry search;
+
+        search.c = c;
+        child = bsearch(&search, node->children, node->children_count, sizeof(struct trie_child_entry), trie_children_cmp);
+        if (child)
+                return child->child;
+        return NULL;
+}
+
+static void trie_node_cleanup(struct trie_node *node) {
+        size_t i;
+
+        for (i = 0; i < node->children_count; i++)
+                trie_node_cleanup(node->children[i].child);
+        free(node->children);
+        free(node->values);
+        free(node);
+}
+
+static int trie_values_cmp(const void *v1, const void *v2, void *arg) {
+        const struct trie_value_entry *val1 = v1;
+        const struct trie_value_entry *val2 = v2;
+        struct trie *trie = arg;
+
+        return strcmp(trie->strings->buf + val1->key_off,
+                      trie->strings->buf + val2->key_off);
+}
+
+static int trie_node_add_value(struct trie *trie, struct trie_node *node,
+                          const char *key, const char *value) {
+        ssize_t k, v;
+        struct trie_value_entry *val;
+
+        k = strbuf_add_string(trie->strings, key, strlen(key));
+        if (k < 0)
+                return k;
+        v = strbuf_add_string(trie->strings, value, strlen(value));
+        if (v < 0)
+                return v;
+
+        if (node->values_count) {
+                struct trie_value_entry search = {
+                        .key_off = k,
+                        .value_off = v,
+                };
+
+                val = xbsearch_r(&search, node->values, node->values_count, sizeof(struct trie_value_entry), trie_values_cmp, trie);
+                if (val) {
+                        /* replace existing earlier key with new value */
+                        val->value_off = v;
+                        return 0;
+                }
+        }
+
+        /* extend array, add new entry, sort for bisection */
+        val = realloc(node->values, (node->values_count + 1) * sizeof(struct trie_value_entry));
+        if (!val)
+                return -ENOMEM;
+        trie->values_count++;
+        node->values = val;
+        node->values[node->values_count].key_off = k;
+        node->values[node->values_count].value_off = v;
+        node->values_count++;
+        qsort_r(node->values, node->values_count, sizeof(struct trie_value_entry), trie_values_cmp, trie);
+        return 0;
+}
+
+static int trie_insert(struct trie *trie, struct trie_node *node, const char *search,
+                       const char *key, const char *value) {
+        size_t i = 0;
+        int err = 0;
+
+        for (;;) {
+                size_t p;
+                uint8_t c;
+                struct trie_node *child;
+
+                for (p = 0; (c = trie->strings->buf[node->prefix_off + p]); p++) {
+                        _cleanup_free_ char *s = NULL;
+                        ssize_t off;
+                        _cleanup_free_ struct trie_node *new_child = NULL;
+
+                        if (c == search[i + p])
+                                continue;
+
+                        /* split node */
+                        new_child = new0(struct trie_node, 1);
+                        if (!new_child)
+                                return -ENOMEM;
+
+                        /* move values from parent to child */
+                        new_child->prefix_off = node->prefix_off + p+1;
+                        new_child->children = node->children;
+                        new_child->children_count = node->children_count;
+                        new_child->values = node->values;
+                        new_child->values_count = node->values_count;
+
+                        /* update parent; use strdup() because the source gets realloc()d */
+                        s = strndup(trie->strings->buf + node->prefix_off, p);
+                        if (!s)
+                                return -ENOMEM;
+
+                        off = strbuf_add_string(trie->strings, s, p);
+                        if (off < 0)
+                                return off;
+
+                        node->prefix_off = off;
+                        node->children = NULL;
+                        node->children_count = 0;
+                        node->values = NULL;
+                        node->values_count = 0;
+                        err = node_add_child(trie, node, new_child, c);
+                        if (err)
+                                return err;
+
+                        new_child = NULL; /* avoid cleanup */
+                        break;
+                }
+                i += p;
+
+                c = search[i];
+                if (c == '\0')
+                        return trie_node_add_value(trie, node, key, value);
+
+                child = node_lookup(node, c);
+                if (!child) {
+                        ssize_t off;
+
+                        /* new child */
+                        child = new0(struct trie_node, 1);
+                        if (!child)
+                                return -ENOMEM;
+
+                        off = strbuf_add_string(trie->strings, search + i+1, strlen(search + i+1));
+                        if (off < 0) {
+                                free(child);
+                                return off;
+                        }
+
+                        child->prefix_off = off;
+                        err = node_add_child(trie, node, child, c);
+                        if (err) {
+                                free(child);
+                                return err;
+                        }
+
+                        return trie_node_add_value(trie, child, key, value);
+                }
+
+                node = child;
+                i++;
+        }
+}
+
+struct trie_f {
+        FILE *f;
+        struct trie *trie;
+        uint64_t strings_off;
+
+        uint64_t nodes_count;
+        uint64_t children_count;
+        uint64_t values_count;
+};
+
+/* calculate the storage space for the nodes, children arrays, value arrays */
+static void trie_store_nodes_size(struct trie_f *trie, struct trie_node *node) {
+        uint64_t i;
+
+        for (i = 0; i < node->children_count; i++)
+                trie_store_nodes_size(trie, node->children[i].child);
+
+        trie->strings_off += sizeof(struct trie_node_f);
+        for (i = 0; i < node->children_count; i++)
+                trie->strings_off += sizeof(struct trie_child_entry_f);
+        for (i = 0; i < node->values_count; i++)
+                trie->strings_off += sizeof(struct trie_value_entry_f);
+}
+
+static int64_t trie_store_nodes(struct trie_f *trie, struct trie_node *node) {
+        uint64_t i;
+        struct trie_node_f n = {
+                .prefix_off = htole64(trie->strings_off + node->prefix_off),
+                .children_count = node->children_count,
+                .values_count = htole64(node->values_count),
+        };
+        struct trie_child_entry_f *children = NULL;
+        int64_t node_off;
+
+        if (node->children_count) {
+                children = new0(struct trie_child_entry_f, node->children_count);
+                if (!children)
+                        return -ENOMEM;
+        }
+
+        /* post-order recursion */
+        for (i = 0; i < node->children_count; i++) {
+                int64_t child_off;
+
+                child_off = trie_store_nodes(trie, node->children[i].child);
+                if (child_off < 0) {
+                        free(children);
+                        return child_off;
+                }
+                children[i].c = node->children[i].c;
+                children[i].child_off = htole64(child_off);
+        }
+
+        /* write node */
+        node_off = ftello(trie->f);
+        fwrite(&n, sizeof(struct trie_node_f), 1, trie->f);
+        trie->nodes_count++;
+
+        /* append children array */
+        if (node->children_count) {
+                fwrite(children, sizeof(struct trie_child_entry_f), node->children_count, trie->f);
+                trie->children_count += node->children_count;
+                free(children);
+        }
+
+        /* append values array */
+        for (i = 0; i < node->values_count; i++) {
+                struct trie_value_entry_f v = {
+                        .key_off = htole64(trie->strings_off + node->values[i].key_off),
+                        .value_off = htole64(trie->strings_off + node->values[i].value_off),
+                };
+
+                fwrite(&v, sizeof(struct trie_value_entry_f), 1, trie->f);
+                trie->values_count++;
+        }
+
+        return node_off;
+}
+
+static int trie_store(struct trie *trie, const char *filename) {
+        struct trie_f t = {
+                .trie = trie,
+        };
+        _cleanup_free_ char *filename_tmp = NULL;
+        int64_t pos;
+        int64_t root_off;
+        int64_t size;
+        struct trie_header_f h = {
+                .signature = HWDB_SIG,
+                .tool_version = htole64(atoi(VERSION)),
+                .header_size = htole64(sizeof(struct trie_header_f)),
+                .node_size = htole64(sizeof(struct trie_node_f)),
+                .child_entry_size = htole64(sizeof(struct trie_child_entry_f)),
+                .value_entry_size = htole64(sizeof(struct trie_value_entry_f)),
+        };
+        int err;
+
+        /* calculate size of header, nodes, children entries, value entries */
+        t.strings_off = sizeof(struct trie_header_f);
+        trie_store_nodes_size(&t, trie->root);
+
+        err = fopen_temporary(filename , &t.f, &filename_tmp);
+        if (err < 0)
+                return err;
+        fchmod(fileno(t.f), 0444);
+
+        /* write nodes */
+        err = fseeko(t.f, sizeof(struct trie_header_f), SEEK_SET);
+        if (err < 0) {
+                fclose(t.f);
+                unlink_noerrno(filename_tmp);
+                return -errno;
+        }
+        root_off = trie_store_nodes(&t, trie->root);
+        h.nodes_root_off = htole64(root_off);
+        pos = ftello(t.f);
+        h.nodes_len = htole64(pos - sizeof(struct trie_header_f));
+
+        /* write string buffer */
+        fwrite(trie->strings->buf, trie->strings->len, 1, t.f);
+        h.strings_len = htole64(trie->strings->len);
+
+        /* write header */
+        size = ftello(t.f);
+        h.file_size = htole64(size);
+        err = fseeko(t.f, 0, SEEK_SET);
+        if (err < 0) {
+                fclose(t.f);
+                unlink_noerrno(filename_tmp);
+                return -errno;
+        }
+        fwrite(&h, sizeof(struct trie_header_f), 1, t.f);
+        err = ferror(t.f);
+        if (err)
+                err = -errno;
+        fclose(t.f);
+        if (err < 0 || rename(filename_tmp, filename) < 0) {
+                unlink_noerrno(filename_tmp);
+                return err < 0 ? err : -errno;
+        }
+
+        log_debug("=== trie on-disk ===");
+        log_debug("size:             %8"PRIi64" bytes", size);
+        log_debug("header:           %8zu bytes", sizeof(struct trie_header_f));
+        log_debug("nodes:            %8"PRIu64" bytes (%8"PRIu64")",
+                  t.nodes_count * sizeof(struct trie_node_f), t.nodes_count);
+        log_debug("child pointers:   %8"PRIu64" bytes (%8"PRIu64")",
+                  t.children_count * sizeof(struct trie_child_entry_f), t.children_count);
+        log_debug("value pointers:   %8"PRIu64" bytes (%8"PRIu64")",
+                  t.values_count * sizeof(struct trie_value_entry_f), t.values_count);
+        log_debug("string store:     %8zu bytes", trie->strings->len);
+        log_debug("strings start:    %8"PRIu64, t.strings_off);
+
+        return 0;
+}
+
+static int insert_data(struct trie *trie, struct udev_list *match_list,
+                       char *line, const char *filename) {
+        char *value;
+        struct udev_list_entry *entry;
+
+        value = strchr(line, '=');
+        if (!value) {
+                log_error("Error, key/value pair expected but got '%s' in '%s':", line, filename);
+                return -EINVAL;
+        }
+
+        value[0] = '\0';
+        value++;
+
+        /* libudev requires properties to start with a space */
+        while (isblank(line[0]) && isblank(line[1]))
+                line++;
+
+        if (line[0] == '\0' || value[0] == '\0') {
+                log_error("Error, empty key or value '%s' in '%s':", line, filename);
+                return -EINVAL;
+        }
+
+        udev_list_entry_foreach(entry, udev_list_get_entry(match_list))
+                trie_insert(trie, trie->root, udev_list_entry_get_name(entry), line, value);
+
+        return 0;
+}
+
+static int import_file(struct udev *udev, struct trie *trie, const char *filename) {
+        enum {
+                HW_MATCH,
+                HW_DATA,
+                HW_NONE,
+        } state = HW_NONE;
+        FILE *f;
+        char line[LINE_MAX];
+        struct udev_list match_list;
+
+        udev_list_init(udev, &match_list, false);
+
+        f = fopen(filename, "re");
+        if (f == NULL)
+                return -errno;
+
+        while (fgets(line, sizeof(line), f)) {
+                size_t len;
+                char *pos;
+
+                /* comment line */
+                if (line[0] == '#')
+                        continue;
+
+                /* strip trailing comment */
+                pos = strchr(line, '#');
+                if (pos)
+                        pos[0] = '\0';
+
+                /* strip trailing whitespace */
+                len = strlen(line);
+                while (len > 0 && isspace(line[len-1]))
+                        len--;
+                line[len] = '\0';
+
+                switch (state) {
+                case HW_NONE:
+                        if (len == 0)
+                                break;
+
+                        if (line[0] == ' ') {
+                                log_error("Error, MATCH expected but got '%s' in '%s':", line, filename);
+                                break;
+                        }
+
+                        /* start of record, first match */
+                        state = HW_MATCH;
+                        udev_list_entry_add(&match_list, line, NULL);
+                        break;
+
+                case HW_MATCH:
+                        if (len == 0) {
+                                log_error("Error, DATA expected but got empty line in '%s':", filename);
+                                state = HW_NONE;
+                                udev_list_cleanup(&match_list);
+                                break;
+                        }
+
+                        /* another match */
+                        if (line[0] != ' ') {
+                                udev_list_entry_add(&match_list, line, NULL);
+                                break;
+                        }
+
+                        /* first data */
+                        state = HW_DATA;
+                        insert_data(trie, &match_list, line, filename);
+                        break;
+
+                case HW_DATA:
+                        /* end of record */
+                        if (len == 0) {
+                                state = HW_NONE;
+                                udev_list_cleanup(&match_list);
+                                break;
+                        }
+
+                        if (line[0] != ' ') {
+                                log_error("Error, DATA expected but got '%s' in '%s':", line, filename);
+                                state = HW_NONE;
+                                udev_list_cleanup(&match_list);
+                                break;
+                        }
+
+                        insert_data(trie, &match_list, line, filename);
+                        break;
+                };
+        }
+
+        fclose(f);
+        udev_list_cleanup(&match_list);
+        return 0;
+}
+
+static void help(void) {
+        printf("Usage: udevadm hwdb OPTIONS\n"
+               "  -u,--update          update the hardware database\n"
+               "  --usr                generate in " UDEVLIBEXECDIR " instead of /etc/udev\n"
+               "  -t,--test=MODALIAS   query database and print result\n"
+               "  -r,--root=PATH       alternative root path in the filesystem\n"
+               "  -h,--help\n\n");
+}
+
+static int adm_hwdb(struct udev *udev, int argc, char *argv[]) {
+        enum {
+                ARG_USR = 0x100,
+        };
+
+        static const struct option options[] = {
+                { "update", no_argument,       NULL, 'u' },
+                { "usr",    no_argument,       NULL, ARG_USR },
+                { "test",   required_argument, NULL, 't' },
+                { "root",   required_argument, NULL, 'r' },
+                { "help",   no_argument,       NULL, 'h' },
+                {}
+        };
+        const char *test = NULL;
+        const char *root = "";
+        const char *hwdb_bin_dir = "/etc/udev";
+        bool update = false;
+        struct trie *trie = NULL;
+        int err, c;
+        int rc = EXIT_SUCCESS;
+
+        while ((c = getopt_long(argc, argv, "ut:r:h", options, NULL)) >= 0)
+                switch(c) {
+                case 'u':
+                        update = true;
+                        break;
+                case ARG_USR:
+                        hwdb_bin_dir = UDEVLIBEXECDIR;
+                        break;
+                case 't':
+                        test = optarg;
+                        break;
+                case 'r':
+                        root = optarg;
+                        break;
+                case 'h':
+                        help();
+                        return EXIT_SUCCESS;
+                case '?':
+                        return EXIT_FAILURE;
+                default:
+                        assert_not_reached("Unknown option");
+                }
+
+        if (!update && !test) {
+                log_error("Either --update or --test must be used");
+                return EXIT_FAILURE;
+        }
+
+        if (update) {
+                char **files, **f;
+                _cleanup_free_ char *hwdb_bin = NULL;
+
+                trie = new0(struct trie, 1);
+                if (!trie) {
+                        rc = EXIT_FAILURE;
+                        goto out;
+                }
+
+                /* string store */
+                trie->strings = strbuf_new();
+                if (!trie->strings) {
+                        rc = EXIT_FAILURE;
+                        goto out;
+                }
+
+                /* index */
+                trie->root = new0(struct trie_node, 1);
+                if (!trie->root) {
+                        rc = EXIT_FAILURE;
+                        goto out;
+                }
+                trie->nodes_count++;
+
+                err = conf_files_list_strv(&files, ".hwdb", root, conf_file_dirs);
+                if (err < 0) {
+                        log_error_errno(err, "failed to enumerate hwdb files: %m");
+                        rc = EXIT_FAILURE;
+                        goto out;
+                }
+                STRV_FOREACH(f, files) {
+                        log_debug("reading file '%s'", *f);
+                        import_file(udev, trie, *f);
+                }
+                strv_free(files);
+
+                strbuf_complete(trie->strings);
+
+                log_debug("=== trie in-memory ===");
+                log_debug("nodes:            %8zu bytes (%8zu)",
+                          trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
+                log_debug("children arrays:  %8zu bytes (%8zu)",
+                          trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
+                log_debug("values arrays:    %8zu bytes (%8zu)",
+                          trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
+                log_debug("strings:          %8zu bytes",
+                          trie->strings->len);
+                log_debug("strings incoming: %8zu bytes (%8zu)",
+                          trie->strings->in_len, trie->strings->in_count);
+                log_debug("strings dedup'ed: %8zu bytes (%8zu)",
+                          trie->strings->dedup_len, trie->strings->dedup_count);
+
+                hwdb_bin = strjoin(root, "/", hwdb_bin_dir, "/hwdb.bin", NULL);
+                if (!hwdb_bin) {
+                        rc = EXIT_FAILURE;
+                        goto out;
+                }
+                mkdir_parents(hwdb_bin, 0755);
+                err = trie_store(trie, hwdb_bin);
+                if (err < 0) {
+                        log_error_errno(err, "Failure writing database %s: %m", hwdb_bin);
+                        rc = EXIT_FAILURE;
+                }
+        }
+
+        if (test) {
+                _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
+                int r;
+
+                r = sd_hwdb_new(&hwdb);
+                if (r >= 0) {
+                        const char *key, *value;
+
+                        SD_HWDB_FOREACH_PROPERTY(hwdb, test, key, value)
+                                printf("%s=%s\n", key, value);
+                }
+        }
+out:
+        if (trie) {
+                if (trie->root)
+                        trie_node_cleanup(trie->root);
+                strbuf_cleanup(trie->strings);
+                free(trie);
+        }
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_hwdb = {
+        .name = "hwdb",
+        .cmd = adm_hwdb,
+};
diff --git a/src/grp-udev/udevadm/udevadm-info.c b/src/grp-udev/udevadm/udevadm-info.c
new file mode 100644
index 0000000000..7182668f23
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-info.c
@@ -0,0 +1,494 @@
+/*
+ * Copyright (C) 2004-2009 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "fd-util.h"
+#include "string-util.h"
+#include "udev-util.h"
+#include "udev.h"
+#include "udevadm-util.h"
+
+static bool skip_attribute(const char *name) {
+        static const char* const skip[] = {
+                "uevent",
+                "dev",
+                "modalias",
+                "resource",
+                "driver",
+                "subsystem",
+                "module",
+        };
+        unsigned int i;
+
+        for (i = 0; i < ELEMENTSOF(skip); i++)
+                if (streq(name, skip[i]))
+                        return true;
+        return false;
+}
+
+static void print_all_attributes(struct udev_device *device, const char *key) {
+        struct udev_list_entry *sysattr;
+
+        udev_list_entry_foreach(sysattr, udev_device_get_sysattr_list_entry(device)) {
+                const char *name;
+                const char *value;
+                size_t len;
+
+                name = udev_list_entry_get_name(sysattr);
+                if (skip_attribute(name))
+                        continue;
+
+                value = udev_device_get_sysattr_value(device, name);
+                if (value == NULL)
+                        continue;
+
+                /* skip any values that look like a path */
+                if (value[0] == '/')
+                        continue;
+
+                /* skip nonprintable attributes */
+                len = strlen(value);
+                while (len > 0 && isprint(value[len-1]))
+                        len--;
+                if (len > 0)
+                        continue;
+
+                printf("    %s{%s}==\"%s\"\n", key, name, value);
+        }
+        printf("\n");
+}
+
+static int print_device_chain(struct udev_device *device) {
+        struct udev_device *device_parent;
+        const char *str;
+
+        printf("\n"
+               "Udevadm info starts with the device specified by the devpath and then\n"
+               "walks up the chain of parent devices. It prints for every device\n"
+               "found, all possible attributes in the udev rules key format.\n"
+               "A rule to match, can be composed by the attributes of the device\n"
+               "and the attributes from one single parent device.\n"
+               "\n");
+
+        printf("  looking at device '%s':\n", udev_device_get_devpath(device));
+        printf("    KERNEL==\"%s\"\n", udev_device_get_sysname(device));
+        str = udev_device_get_subsystem(device);
+        if (str == NULL)
+                str = "";
+        printf("    SUBSYSTEM==\"%s\"\n", str);
+        str = udev_device_get_driver(device);
+        if (str == NULL)
+                str = "";
+        printf("    DRIVER==\"%s\"\n", str);
+        print_all_attributes(device, "ATTR");
+
+        device_parent = device;
+        do {
+                device_parent = udev_device_get_parent(device_parent);
+                if (device_parent == NULL)
+                        break;
+                printf("  looking at parent device '%s':\n", udev_device_get_devpath(device_parent));
+                printf("    KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent));
+                str = udev_device_get_subsystem(device_parent);
+                if (str == NULL)
+                        str = "";
+                printf("    SUBSYSTEMS==\"%s\"\n", str);
+                str = udev_device_get_driver(device_parent);
+                if (str == NULL)
+                        str = "";
+                printf("    DRIVERS==\"%s\"\n", str);
+                print_all_attributes(device_parent, "ATTRS");
+        } while (device_parent != NULL);
+
+        return 0;
+}
+
+static void print_record(struct udev_device *device) {
+        const char *str;
+        int i;
+        struct udev_list_entry *list_entry;
+
+        printf("P: %s\n", udev_device_get_devpath(device));
+
+        str = udev_device_get_devnode(device);
+        if (str != NULL)
+                printf("N: %s\n", str + strlen("/dev/"));
+
+        i = udev_device_get_devlink_priority(device);
+        if (i != 0)
+                printf("L: %i\n", i);
+
+        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device))
+                printf("S: %s\n", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
+
+        udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
+                printf("E: %s=%s\n",
+                       udev_list_entry_get_name(list_entry),
+                       udev_list_entry_get_value(list_entry));
+        printf("\n");
+}
+
+static int stat_device(const char *name, bool export, const char *prefix) {
+        struct stat statbuf;
+
+        if (stat(name, &statbuf) != 0)
+                return -1;
+
+        if (export) {
+                if (prefix == NULL)
+                        prefix = "INFO_";
+                printf("%sMAJOR=%u\n"
+                       "%sMINOR=%u\n",
+                       prefix, major(statbuf.st_dev),
+                       prefix, minor(statbuf.st_dev));
+        } else
+                printf("%u:%u\n", major(statbuf.st_dev), minor(statbuf.st_dev));
+        return 0;
+}
+
+static int export_devices(struct udev *udev) {
+        struct udev_enumerate *udev_enumerate;
+        struct udev_list_entry *list_entry;
+
+        udev_enumerate = udev_enumerate_new(udev);
+        if (udev_enumerate == NULL)
+                return -1;
+        udev_enumerate_scan_devices(udev_enumerate);
+        udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+                struct udev_device *device;
+
+                device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
+                if (device != NULL) {
+                        print_record(device);
+                        udev_device_unref(device);
+                }
+        }
+        udev_enumerate_unref(udev_enumerate);
+        return 0;
+}
+
+static void cleanup_dir(DIR *dir, mode_t mask, int depth) {
+        struct dirent *dent;
+
+        if (depth <= 0)
+                return;
+
+        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+                struct stat stats;
+
+                if (dent->d_name[0] == '.')
+                        continue;
+                if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0)
+                        continue;
+                if ((stats.st_mode & mask) != 0)
+                        continue;
+                if (S_ISDIR(stats.st_mode)) {
+                        _cleanup_closedir_ DIR *dir2;
+
+                        dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
+                        if (dir2 != NULL)
+                                cleanup_dir(dir2, mask, depth-1);
+
+                        (void) unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
+                } else
+                        (void) unlinkat(dirfd(dir), dent->d_name, 0);
+        }
+}
+
+static void cleanup_db(struct udev *udev) {
+        DIR *dir;
+
+        unlink("/run/udev/queue.bin");
+
+        dir = opendir("/run/udev/data");
+        if (dir != NULL) {
+                cleanup_dir(dir, S_ISVTX, 1);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/links");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 2);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/tags");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 2);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/static_node-tags");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 2);
+                closedir(dir);
+        }
+
+        dir = opendir("/run/udev/watch");
+        if (dir != NULL) {
+                cleanup_dir(dir, 0, 1);
+                closedir(dir);
+        }
+}
+
+static void help(void) {
+
+        printf("%s info [OPTIONS] [DEVPATH|FILE]\n\n"
+               "Query sysfs or the udev database.\n\n"
+               "  -h --help                   Print this message\n"
+               "     --version                Print version of the program\n"
+               "  -q --query=TYPE             Query device information:\n"
+               "       name                     Name of device node\n"
+               "       symlink                  Pointing to node\n"
+               "       path                     sysfs device path\n"
+               "       property                 The device properties\n"
+               "       all                      All values\n"
+               "  -p --path=SYSPATH           sysfs device path used for query or attribute walk\n"
+               "  -n --name=NAME              Node or symlink name used for query or attribute walk\n"
+               "  -r --root                   Prepend dev directory to path names\n"
+               "  -a --attribute-walk         Print all key matches walking along the chain\n"
+               "                              of parent devices\n"
+               "  -d --device-id-of-file=FILE Print major:minor of device containing this file\n"
+               "  -x --export                 Export key/value pairs\n"
+               "  -P --export-prefix          Export the key name with a prefix\n"
+               "  -e --export-db              Export the content of the udev database\n"
+               "  -c --cleanup-db             Clean up the udev database\n"
+               , program_invocation_short_name);
+}
+
+static int uinfo(struct udev *udev, int argc, char *argv[]) {
+        _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+        bool root = 0;
+        bool export = 0;
+        const char *export_prefix = NULL;
+        char name[UTIL_PATH_SIZE];
+        struct udev_list_entry *list_entry;
+        int c;
+
+        static const struct option options[] = {
+                { "name",              required_argument, NULL, 'n' },
+                { "path",              required_argument, NULL, 'p' },
+                { "query",             required_argument, NULL, 'q' },
+                { "attribute-walk",    no_argument,       NULL, 'a' },
+                { "cleanup-db",        no_argument,       NULL, 'c' },
+                { "export-db",         no_argument,       NULL, 'e' },
+                { "root",              no_argument,       NULL, 'r' },
+                { "device-id-of-file", required_argument, NULL, 'd' },
+                { "export",            no_argument,       NULL, 'x' },
+                { "export-prefix",     required_argument, NULL, 'P' },
+                { "version",           no_argument,       NULL, 'V' },
+                { "help",              no_argument,       NULL, 'h' },
+                {}
+        };
+
+        enum action_type {
+                ACTION_QUERY,
+                ACTION_ATTRIBUTE_WALK,
+                ACTION_DEVICE_ID_FILE,
+        } action = ACTION_QUERY;
+
+        enum query_type {
+                QUERY_NAME,
+                QUERY_PATH,
+                QUERY_SYMLINK,
+                QUERY_PROPERTY,
+                QUERY_ALL,
+        } query = QUERY_ALL;
+
+        while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL)) >= 0)
+                switch (c) {
+                case 'n': {
+                        if (device != NULL) {
+                                fprintf(stderr, "device already specified\n");
+                                return 2;
+                        }
+
+                        device = find_device(udev, optarg, "/dev/");
+                        if (device == NULL) {
+                                fprintf(stderr, "device node not found\n");
+                                return 2;
+                        }
+                        break;
+                }
+                case 'p':
+                        if (device != NULL) {
+                                fprintf(stderr, "device already specified\n");
+                                return 2;
+                        }
+
+                        device = find_device(udev, optarg, "/sys");
+                        if (device == NULL) {
+                                fprintf(stderr, "syspath not found\n");
+                                return 2;
+                        }
+                        break;
+                case 'q':
+                        action = ACTION_QUERY;
+                        if (streq(optarg, "property") || streq(optarg, "env"))
+                                query = QUERY_PROPERTY;
+                        else if (streq(optarg, "name"))
+                                query = QUERY_NAME;
+                        else if (streq(optarg, "symlink"))
+                                query = QUERY_SYMLINK;
+                        else if (streq(optarg, "path"))
+                                query = QUERY_PATH;
+                        else if (streq(optarg, "all"))
+                                query = QUERY_ALL;
+                        else {
+                                fprintf(stderr, "unknown query type\n");
+                                return 3;
+                        }
+                        break;
+                case 'r':
+                        root = true;
+                        break;
+                case 'd':
+                        action = ACTION_DEVICE_ID_FILE;
+                        strscpy(name, sizeof(name), optarg);
+                        break;
+                case 'a':
+                        action = ACTION_ATTRIBUTE_WALK;
+                        break;
+                case 'e':
+                        export_devices(udev);
+                        return 0;
+                case 'c':
+                        cleanup_db(udev);
+                        return 0;
+                case 'x':
+                        export = true;
+                        break;
+                case 'P':
+                        export_prefix = optarg;
+                        break;
+                case 'V':
+                        printf("%s\n", VERSION);
+                        return 0;
+                case 'h':
+                        help();
+                        return 0;
+                default:
+                        return 1;
+                }
+
+        switch (action) {
+        case ACTION_QUERY:
+                if (!device) {
+                        if (!argv[optind]) {
+                                help();
+                                return 2;
+                        }
+                        device = find_device(udev, argv[optind], NULL);
+                        if (!device) {
+                                fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
+                                return 4;
+                        }
+                }
+
+                switch(query) {
+                case QUERY_NAME: {
+                        const char *node = udev_device_get_devnode(device);
+
+                        if (node == NULL) {
+                                fprintf(stderr, "no device node found\n");
+                                return 5;
+                        }
+
+                        if (root)
+                                printf("%s\n", udev_device_get_devnode(device));
+                        else
+                                printf("%s\n", udev_device_get_devnode(device) + strlen("/dev/"));
+                        break;
+                }
+                case QUERY_SYMLINK:
+                        list_entry = udev_device_get_devlinks_list_entry(device);
+                        while (list_entry != NULL) {
+                                if (root)
+                                        printf("%s", udev_list_entry_get_name(list_entry));
+                                else
+                                        printf("%s", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
+                                list_entry = udev_list_entry_get_next(list_entry);
+                                if (list_entry != NULL)
+                                        printf(" ");
+                        }
+                        printf("\n");
+                        break;
+                case QUERY_PATH:
+                        printf("%s\n", udev_device_get_devpath(device));
+                        return 0;
+                case QUERY_PROPERTY:
+                        list_entry = udev_device_get_properties_list_entry(device);
+                        while (list_entry != NULL) {
+                                if (export) {
+                                        const char *prefix = export_prefix;
+
+                                        if (prefix == NULL)
+                                                prefix = "";
+                                        printf("%s%s='%s'\n", prefix,
+                                               udev_list_entry_get_name(list_entry),
+                                               udev_list_entry_get_value(list_entry));
+                                } else {
+                                        printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
+                                }
+                                list_entry = udev_list_entry_get_next(list_entry);
+                        }
+                        break;
+                case QUERY_ALL:
+                        print_record(device);
+                        break;
+                default:
+                        assert_not_reached("unknown query type");
+                }
+                break;
+        case ACTION_ATTRIBUTE_WALK:
+                if (!device && argv[optind]) {
+                        device = find_device(udev, argv[optind], NULL);
+                        if (!device) {
+                                fprintf(stderr, "Unknown device, absolute path in /dev/ or /sys expected.\n");
+                                return 4;
+                        }
+                }
+                if (!device) {
+                        fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
+                        return 4;
+                }
+                print_device_chain(device);
+                break;
+        case ACTION_DEVICE_ID_FILE:
+                if (stat_device(name, export, export_prefix) != 0)
+                        return 1;
+                break;
+        }
+
+        return 0;
+}
+
+const struct udevadm_cmd udevadm_info = {
+        .name = "info",
+        .cmd = uinfo,
+        .help = "Query sysfs or the udev database",
+};
diff --git a/src/grp-udev/udevadm/udevadm-monitor.c b/src/grp-udev/udevadm/udevadm-monitor.c
new file mode 100644
index 0000000000..c0ef073476
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-monitor.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright (C) 2004-2010 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "fd-util.h"
+#include "formats-util.h"
+#include "udev-util.h"
+#include "udev.h"
+
+static bool udev_exit;
+
+static void sig_handler(int signum) {
+        if (signum == SIGINT || signum == SIGTERM)
+                udev_exit = true;
+}
+
+static void print_device(struct udev_device *device, const char *source, int prop) {
+        struct timespec ts;
+
+        assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
+        printf("%-6s[%"PRI_TIME".%06ld] %-8s %s (%s)\n",
+               source,
+               ts.tv_sec, ts.tv_nsec/1000,
+               udev_device_get_action(device),
+               udev_device_get_devpath(device),
+               udev_device_get_subsystem(device));
+        if (prop) {
+                struct udev_list_entry *list_entry;
+
+                udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
+                        printf("%s=%s\n",
+                               udev_list_entry_get_name(list_entry),
+                               udev_list_entry_get_value(list_entry));
+                printf("\n");
+        }
+}
+
+static void help(void) {
+        printf("%s monitor [--property] [--kernel] [--udev] [--help]\n\n"
+               "Listen to kernel and udev events.\n\n"
+               "  -h --help                                Show this help\n"
+               "     --version                             Show package version\n"
+               "  -p --property                            Print the event properties\n"
+               "  -k --kernel                              Print kernel uevents\n"
+               "  -u --udev                                Print udev events\n"
+               "  -s --subsystem-match=SUBSYSTEM[/DEVTYPE] Filter events by subsystem\n"
+               "  -t --tag-match=TAG                       Filter events by tag\n"
+               , program_invocation_short_name);
+}
+
+static int adm_monitor(struct udev *udev, int argc, char *argv[]) {
+        struct sigaction act = {};
+        sigset_t mask;
+        bool prop = false;
+        bool print_kernel = false;
+        bool print_udev = false;
+        _cleanup_udev_list_cleanup_ struct udev_list subsystem_match_list;
+        _cleanup_udev_list_cleanup_ struct udev_list tag_match_list;
+        _cleanup_udev_monitor_unref_ struct udev_monitor *udev_monitor = NULL;
+        _cleanup_udev_monitor_unref_ struct udev_monitor *kernel_monitor = NULL;
+        _cleanup_close_ int fd_ep = -1;
+        int fd_kernel = -1, fd_udev = -1;
+        struct epoll_event ep_kernel, ep_udev;
+        int c;
+
+        static const struct option options[] = {
+                { "property",        no_argument,       NULL, 'p' },
+                { "environment",     no_argument,       NULL, 'e' }, /* alias for -p */
+                { "kernel",          no_argument,       NULL, 'k' },
+                { "udev",            no_argument,       NULL, 'u' },
+                { "subsystem-match", required_argument, NULL, 's' },
+                { "tag-match",       required_argument, NULL, 't' },
+                { "help",            no_argument,       NULL, 'h' },
+                {}
+        };
+
+        udev_list_init(udev, &subsystem_match_list, true);
+        udev_list_init(udev, &tag_match_list, true);
+
+        while ((c = getopt_long(argc, argv, "pekus:t:h", options, NULL)) >= 0)
+                switch (c) {
+                case 'p':
+                case 'e':
+                        prop = true;
+                        break;
+                case 'k':
+                        print_kernel = true;
+                        break;
+                case 'u':
+                        print_udev = true;
+                        break;
+                case 's':
+                        {
+                                char subsys[UTIL_NAME_SIZE];
+                                char *devtype;
+
+                                strscpy(subsys, sizeof(subsys), optarg);
+                                devtype = strchr(subsys, '/');
+                                if (devtype != NULL) {
+                                        devtype[0] = '\0';
+                                        devtype++;
+                                }
+                                udev_list_entry_add(&subsystem_match_list, subsys, devtype);
+                                break;
+                        }
+                case 't':
+                        udev_list_entry_add(&tag_match_list, optarg, NULL);
+                        break;
+                case 'h':
+                        help();
+                        return 0;
+                default:
+                        return 1;
+                }
+
+        if (!print_kernel && !print_udev) {
+                print_kernel = true;
+                print_udev = true;
+        }
+
+        /* set signal handlers */
+        act.sa_handler = sig_handler;
+        act.sa_flags = SA_RESTART;
+        sigaction(SIGINT, &act, NULL);
+        sigaction(SIGTERM, &act, NULL);
+        sigemptyset(&mask);
+        sigaddset(&mask, SIGINT);
+        sigaddset(&mask, SIGTERM);
+        sigprocmask(SIG_UNBLOCK, &mask, NULL);
+
+        fd_ep = epoll_create1(EPOLL_CLOEXEC);
+        if (fd_ep < 0) {
+                log_error_errno(errno, "error creating epoll fd: %m");
+                return 1;
+        }
+
+        printf("monitor will print the received events for:\n");
+        if (print_udev) {
+                struct udev_list_entry *entry;
+
+                udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
+                if (udev_monitor == NULL) {
+                        fprintf(stderr, "error: unable to create netlink socket\n");
+                        return 1;
+                }
+                udev_monitor_set_receive_buffer_size(udev_monitor, 128*1024*1024);
+                fd_udev = udev_monitor_get_fd(udev_monitor);
+
+                udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) {
+                        const char *subsys = udev_list_entry_get_name(entry);
+                        const char *devtype = udev_list_entry_get_value(entry);
+
+                        if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, subsys, devtype) < 0)
+                                fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys);
+                }
+
+                udev_list_entry_foreach(entry, udev_list_get_entry(&tag_match_list)) {
+                        const char *tag = udev_list_entry_get_name(entry);
+
+                        if (udev_monitor_filter_add_match_tag(udev_monitor, tag) < 0)
+                                fprintf(stderr, "error: unable to apply tag filter '%s'\n", tag);
+                }
+
+                if (udev_monitor_enable_receiving(udev_monitor) < 0) {
+                        fprintf(stderr, "error: unable to subscribe to udev events\n");
+                        return 2;
+                }
+
+                memzero(&ep_udev, sizeof(struct epoll_event));
+                ep_udev.events = EPOLLIN;
+                ep_udev.data.fd = fd_udev;
+                if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
+                        log_error_errno(errno, "fail to add fd to epoll: %m");
+                        return 2;
+                }
+
+                printf("UDEV - the event which udev sends out after rule processing\n");
+        }
+
+        if (print_kernel) {
+                struct udev_list_entry *entry;
+
+                kernel_monitor = udev_monitor_new_from_netlink(udev, "kernel");
+                if (kernel_monitor == NULL) {
+                        fprintf(stderr, "error: unable to create netlink socket\n");
+                        return 3;
+                }
+                udev_monitor_set_receive_buffer_size(kernel_monitor, 128*1024*1024);
+                fd_kernel = udev_monitor_get_fd(kernel_monitor);
+
+                udev_list_entry_foreach(entry, udev_list_get_entry(&subsystem_match_list)) {
+                        const char *subsys = udev_list_entry_get_name(entry);
+
+                        if (udev_monitor_filter_add_match_subsystem_devtype(kernel_monitor, subsys, NULL) < 0)
+                                fprintf(stderr, "error: unable to apply subsystem filter '%s'\n", subsys);
+                }
+
+                if (udev_monitor_enable_receiving(kernel_monitor) < 0) {
+                        fprintf(stderr, "error: unable to subscribe to kernel events\n");
+                        return 4;
+                }
+
+                memzero(&ep_kernel, sizeof(struct epoll_event));
+                ep_kernel.events = EPOLLIN;
+                ep_kernel.data.fd = fd_kernel;
+                if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_kernel, &ep_kernel) < 0) {
+                        log_error_errno(errno, "fail to add fd to epoll: %m");
+                        return 5;
+                }
+
+                printf("KERNEL - the kernel uevent\n");
+        }
+        printf("\n");
+
+        while (!udev_exit) {
+                int fdcount;
+                struct epoll_event ev[4];
+                int i;
+
+                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
+                if (fdcount < 0) {
+                        if (errno != EINTR)
+                                fprintf(stderr, "error receiving uevent message: %m\n");
+                        continue;
+                }
+
+                for (i = 0; i < fdcount; i++) {
+                        if (ev[i].data.fd == fd_kernel && ev[i].events & EPOLLIN) {
+                                struct udev_device *device;
+
+                                device = udev_monitor_receive_device(kernel_monitor);
+                                if (device == NULL)
+                                        continue;
+                                print_device(device, "KERNEL", prop);
+                                udev_device_unref(device);
+                        } else if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) {
+                                struct udev_device *device;
+
+                                device = udev_monitor_receive_device(udev_monitor);
+                                if (device == NULL)
+                                        continue;
+                                print_device(device, "UDEV", prop);
+                                udev_device_unref(device);
+                        }
+                }
+        }
+
+        return 0;
+}
+
+const struct udevadm_cmd udevadm_monitor = {
+        .name = "monitor",
+        .cmd = adm_monitor,
+        .help = "Listen to kernel and udev events",
+};
diff --git a/src/grp-udev/udevadm/udevadm-settle.c b/src/grp-udev/udevadm/udevadm-settle.c
new file mode 100644
index 0000000000..6a5dc6e9e4
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-settle.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <poll.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "parse-util.h"
+#include "udev.h"
+#include "util.h"
+
+static void help(void) {
+        printf("%s settle OPTIONS\n\n"
+               "Wait for pending udev events.\n\n"
+               "  -h --help                 Show this help\n"
+               "     --version              Show package version\n"
+               "  -t --timeout=SECONDS      Maximum time to wait for events\n"
+               "  -E --exit-if-exists=FILE  Stop waiting if file exists\n"
+               , program_invocation_short_name);
+}
+
+static int adm_settle(struct udev *udev, int argc, char *argv[]) {
+        static const struct option options[] = {
+                { "timeout",        required_argument, NULL, 't' },
+                { "exit-if-exists", required_argument, NULL, 'E' },
+                { "help",           no_argument,       NULL, 'h' },
+                { "seq-start",      required_argument, NULL, 's' }, /* removed */
+                { "seq-end",        required_argument, NULL, 'e' }, /* removed */
+                { "quiet",          no_argument,       NULL, 'q' }, /* removed */
+                {}
+        };
+        usec_t deadline;
+        const char *exists = NULL;
+        unsigned int timeout = 120;
+        struct pollfd pfd[1] = { {.fd = -1}, };
+        int c;
+        struct udev_queue *queue;
+        int rc = EXIT_FAILURE;
+
+        while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) {
+                switch (c) {
+
+                case 't': {
+                        int r;
+
+                        r = safe_atou(optarg, &timeout);
+                        if (r < 0) {
+                                log_error_errno(r, "Invalid timeout value '%s': %m", optarg);
+                                return EXIT_FAILURE;
+                        }
+                        break;
+                }
+
+                case 'E':
+                        exists = optarg;
+                        break;
+
+                case 'h':
+                        help();
+                        return EXIT_SUCCESS;
+
+                case 's':
+                case 'e':
+                case 'q':
+                        log_info("Option -%c no longer supported.", c);
+                        return EXIT_FAILURE;
+
+                case '?':
+                        return EXIT_FAILURE;
+
+                default:
+                        assert_not_reached("Unknown argument");
+                }
+        }
+
+        if (optind < argc) {
+                fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
+                return EXIT_FAILURE;
+        }
+
+        deadline = now(CLOCK_MONOTONIC) + timeout * USEC_PER_SEC;
+
+        /* guarantee that the udev daemon isn't pre-processing */
+        if (getuid() == 0) {
+                struct udev_ctrl *uctrl;
+
+                uctrl = udev_ctrl_new(udev);
+                if (uctrl != NULL) {
+                        if (udev_ctrl_send_ping(uctrl, MAX(5U, timeout)) < 0) {
+                                log_debug("no connection to daemon");
+                                udev_ctrl_unref(uctrl);
+                                return EXIT_SUCCESS;
+                        }
+                        udev_ctrl_unref(uctrl);
+                }
+        }
+
+        queue = udev_queue_new(udev);
+        if (!queue) {
+                log_error("unable to get udev queue");
+                return EXIT_FAILURE;
+        }
+
+        pfd[0].events = POLLIN;
+        pfd[0].fd = udev_queue_get_fd(queue);
+        if (pfd[0].fd < 0) {
+                log_debug("queue is empty, nothing to watch");
+                rc = EXIT_SUCCESS;
+                goto out;
+        }
+
+        for (;;) {
+                if (exists && access(exists, F_OK) >= 0) {
+                        rc = EXIT_SUCCESS;
+                        break;
+                }
+
+                /* exit if queue is empty */
+                if (udev_queue_get_queue_is_empty(queue)) {
+                        rc = EXIT_SUCCESS;
+                        break;
+                }
+
+                if (now(CLOCK_MONOTONIC) >= deadline)
+                        break;
+
+                /* wake up when queue is empty */
+                if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN)
+                        udev_queue_flush(queue);
+        }
+
+out:
+        udev_queue_unref(queue);
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_settle = {
+        .name = "settle",
+        .cmd = adm_settle,
+        .help = "Wait for pending udev events",
+};
diff --git a/src/grp-udev/udevadm/udevadm-test-builtin.c b/src/grp-udev/udevadm/udevadm-test-builtin.c
new file mode 100644
index 0000000000..0b180d03eb
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-test-builtin.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "string-util.h"
+#include "udev.h"
+
+static void help(struct udev *udev) {
+        printf("%s builtin [--help] COMMAND SYSPATH\n\n"
+               "Test a built-in command.\n\n"
+               "  -h --help     Print this message\n"
+               "     --version  Print version of the program\n\n"
+               "Commands:\n"
+               , program_invocation_short_name);
+
+        udev_builtin_list(udev);
+}
+
+static int adm_builtin(struct udev *udev, int argc, char *argv[]) {
+        static const struct option options[] = {
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+        char *command = NULL;
+        char *syspath = NULL;
+        char filename[UTIL_PATH_SIZE];
+        struct udev_device *dev = NULL;
+        enum udev_builtin_cmd cmd;
+        int rc = EXIT_SUCCESS, c;
+
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+                switch (c) {
+                case 'h':
+                        help(udev);
+                        goto out;
+                }
+
+        command = argv[optind++];
+        if (command == NULL) {
+                fprintf(stderr, "command missing\n");
+                help(udev);
+                rc = 2;
+                goto out;
+        }
+
+        syspath = argv[optind++];
+        if (syspath == NULL) {
+                fprintf(stderr, "syspath missing\n");
+                rc = 3;
+                goto out;
+        }
+
+        udev_builtin_init(udev);
+
+        cmd = udev_builtin_lookup(command);
+        if (cmd >= UDEV_BUILTIN_MAX) {
+                fprintf(stderr, "unknown command '%s'\n", command);
+                help(udev);
+                rc = 5;
+                goto out;
+        }
+
+        /* add /sys if needed */
+        if (!startswith(syspath, "/sys"))
+                strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
+        else
+                strscpy(filename, sizeof(filename), syspath);
+        util_remove_trailing_chars(filename, '/');
+
+        dev = udev_device_new_from_syspath(udev, filename);
+        if (dev == NULL) {
+                fprintf(stderr, "unable to open device '%s'\n\n", filename);
+                rc = 4;
+                goto out;
+        }
+
+        rc = udev_builtin_run(dev, cmd, command, true);
+        if (rc < 0) {
+                fprintf(stderr, "error executing '%s', exit code %i\n\n", command, rc);
+                rc = 6;
+        }
+out:
+        udev_device_unref(dev);
+        udev_builtin_exit(udev);
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_test_builtin = {
+        .name = "test-builtin",
+        .cmd = adm_builtin,
+        .help = "Test a built-in command",
+        .debug = true,
+};
diff --git a/src/grp-udev/udevadm/udevadm-test.c b/src/grp-udev/udevadm/udevadm-test.c
new file mode 100644
index 0000000000..702dbe5282
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-test.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004-2008 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/signalfd.h>
+#include <unistd.h>
+
+#include "string-util.h"
+#include "udev-util.h"
+#include "udev.h"
+
+static void help(void) {
+
+        printf("%s test OPTIONS <syspath>\n\n"
+               "Test an event run.\n"
+               "  -h --help                            Show this help\n"
+               "     --version                         Show package version\n"
+               "  -a --action=ACTION                   Set action string\n"
+               "  -N --resolve-names=early|late|never  When to resolve names\n"
+               , program_invocation_short_name);
+}
+
+static int adm_test(struct udev *udev, int argc, char *argv[]) {
+        int resolve_names = 1;
+        char filename[UTIL_PATH_SIZE];
+        const char *action = "add";
+        const char *syspath = NULL;
+        struct udev_list_entry *entry;
+        _cleanup_udev_rules_unref_ struct udev_rules *rules = NULL;
+        _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
+        _cleanup_udev_event_unref_ struct udev_event *event = NULL;
+        sigset_t mask, sigmask_orig;
+        int rc = 0, c;
+
+        static const struct option options[] = {
+                { "action", required_argument, NULL, 'a' },
+                { "resolve-names", required_argument, NULL, 'N' },
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+
+        log_debug("version %s", VERSION);
+
+        while ((c = getopt_long(argc, argv, "a:N:h", options, NULL)) >= 0)
+                switch (c) {
+                case 'a':
+                        action = optarg;
+                        break;
+                case 'N':
+                        if (streq (optarg, "early")) {
+                                resolve_names = 1;
+                        } else if (streq (optarg, "late")) {
+                                resolve_names = 0;
+                        } else if (streq (optarg, "never")) {
+                                resolve_names = -1;
+                        } else {
+                                fprintf(stderr, "resolve-names must be early, late or never\n");
+                                log_error("resolve-names must be early, late or never");
+                                exit(EXIT_FAILURE);
+                        }
+                        break;
+                case 'h':
+                        help();
+                        exit(EXIT_SUCCESS);
+                case '?':
+                        exit(EXIT_FAILURE);
+                default:
+                        assert_not_reached("Unknown option");
+                }
+
+        syspath = argv[optind];
+        if (syspath == NULL) {
+                fprintf(stderr, "syspath parameter missing\n");
+                rc = 2;
+                goto out;
+        }
+
+        printf("This program is for debugging only, it does not run any program\n"
+               "specified by a RUN key. It may show incorrect results, because\n"
+               "some values may be different, or not available at a simulation run.\n"
+               "\n");
+
+        sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
+
+        udev_builtin_init(udev);
+
+        rules = udev_rules_new(udev, resolve_names);
+        if (rules == NULL) {
+                fprintf(stderr, "error reading rules\n");
+                rc = 3;
+                goto out;
+        }
+
+        /* add /sys if needed */
+        if (!startswith(syspath, "/sys"))
+                strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
+        else
+                strscpy(filename, sizeof(filename), syspath);
+        util_remove_trailing_chars(filename, '/');
+
+        dev = udev_device_new_from_synthetic_event(udev, filename, action);
+        if (dev == NULL) {
+                fprintf(stderr, "unable to open device '%s'\n", filename);
+                rc = 4;
+                goto out;
+        }
+
+        /* don't read info from the db */
+        udev_device_set_info_loaded(dev);
+
+        event = udev_event_new(dev);
+
+        sigfillset(&mask);
+        sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
+
+        udev_event_execute_rules(event,
+                                 60 * USEC_PER_SEC, 20 * USEC_PER_SEC,
+                                 NULL,
+                                 rules);
+
+        udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
+                printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
+
+        udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
+                char program[UTIL_PATH_SIZE];
+
+                udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program));
+                printf("run: '%s'\n", program);
+        }
+out:
+        udev_builtin_exit(udev);
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_test = {
+        .name = "test",
+        .cmd = adm_test,
+        .help = "Test an event run",
+        .debug = true,
+};
diff --git a/src/grp-udev/udevadm/udevadm-trigger.c b/src/grp-udev/udevadm/udevadm-trigger.c
new file mode 100644
index 0000000000..9d52345d92
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-trigger.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "string-util.h"
+#include "udev-util.h"
+#include "udev.h"
+#include "udevadm-util.h"
+#include "util.h"
+
+static int verbose;
+static int dry_run;
+
+static void exec_list(struct udev_enumerate *udev_enumerate, const char *action) {
+        struct udev_list_entry *entry;
+
+        udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+                char filename[UTIL_PATH_SIZE];
+                int fd;
+
+                if (verbose)
+                        printf("%s\n", udev_list_entry_get_name(entry));
+                if (dry_run)
+                        continue;
+                strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
+                fd = open(filename, O_WRONLY|O_CLOEXEC);
+                if (fd < 0)
+                        continue;
+                if (write(fd, action, strlen(action)) < 0)
+                        log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
+                close(fd);
+        }
+}
+
+static const char *keyval(const char *str, const char **val, char *buf, size_t size) {
+        char *pos;
+
+        strscpy(buf, size,str);
+        pos = strchr(buf, '=');
+        if (pos != NULL) {
+                pos[0] = 0;
+                pos++;
+        }
+        *val = pos;
+        return buf;
+}
+
+static void help(void) {
+        printf("%s trigger OPTIONS\n\n"
+               "Request events from the kernel.\n\n"
+               "  -h --help                         Show this help\n"
+               "     --version                      Show package version\n"
+               "  -v --verbose                      Print the list of devices while running\n"
+               "  -n --dry-run                      Do not actually trigger the events\n"
+               "  -t --type=                        Type of events to trigger\n"
+               "          devices                     sysfs devices (default)\n"
+               "          subsystems                  sysfs subsystems and drivers\n"
+               "  -c --action=ACTION                Event action value, default is \"change\"\n"
+               "  -s --subsystem-match=SUBSYSTEM    Trigger devices from a matching subsystem\n"
+               "  -S --subsystem-nomatch=SUBSYSTEM  Exclude devices from a matching subsystem\n"
+               "  -a --attr-match=FILE[=VALUE]      Trigger devices with a matching attribute\n"
+               "  -A --attr-nomatch=FILE[=VALUE]    Exclude devices with a matching attribute\n"
+               "  -p --property-match=KEY=VALUE     Trigger devices with a matching property\n"
+               "  -g --tag-match=KEY=VALUE          Trigger devices with a matching property\n"
+               "  -y --sysname-match=NAME           Trigger devices with this /sys path\n"
+               "     --name-match=NAME              Trigger devices with this /dev name\n"
+               "  -b --parent-match=NAME            Trigger devices with that parent device\n"
+               , program_invocation_short_name);
+}
+
+static int adm_trigger(struct udev *udev, int argc, char *argv[]) {
+        enum {
+                ARG_NAME = 0x100,
+        };
+
+        static const struct option options[] = {
+                { "verbose",           no_argument,       NULL, 'v'      },
+                { "dry-run",           no_argument,       NULL, 'n'      },
+                { "type",              required_argument, NULL, 't'      },
+                { "action",            required_argument, NULL, 'c'      },
+                { "subsystem-match",   required_argument, NULL, 's'      },
+                { "subsystem-nomatch", required_argument, NULL, 'S'      },
+                { "attr-match",        required_argument, NULL, 'a'      },
+                { "attr-nomatch",      required_argument, NULL, 'A'      },
+                { "property-match",    required_argument, NULL, 'p'      },
+                { "tag-match",         required_argument, NULL, 'g'      },
+                { "sysname-match",     required_argument, NULL, 'y'      },
+                { "name-match",        required_argument, NULL, ARG_NAME },
+                { "parent-match",      required_argument, NULL, 'b'      },
+                { "help",              no_argument,       NULL, 'h'      },
+                {}
+        };
+        enum {
+                TYPE_DEVICES,
+                TYPE_SUBSYSTEMS,
+        } device_type = TYPE_DEVICES;
+        const char *action = "change";
+        _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
+        int c, r;
+
+        udev_enumerate = udev_enumerate_new(udev);
+        if (udev_enumerate == NULL)
+                return 1;
+
+        while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
+                const char *key;
+                const char *val;
+                char buf[UTIL_PATH_SIZE];
+
+                switch (c) {
+                case 'v':
+                        verbose = 1;
+                        break;
+                case 'n':
+                        dry_run = 1;
+                        break;
+                case 't':
+                        if (streq(optarg, "devices"))
+                                device_type = TYPE_DEVICES;
+                        else if (streq(optarg, "subsystems"))
+                                device_type = TYPE_SUBSYSTEMS;
+                        else {
+                                log_error("unknown type --type=%s", optarg);
+                                return 2;
+                        }
+                        break;
+                case 'c':
+                        if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
+                                log_error("unknown action '%s'", optarg);
+                                return 2;
+                        } else
+                                action = optarg;
+
+                        break;
+                case 's':
+                        r = udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add subsystem match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                case 'S':
+                        r = udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add negative subsystem match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                case 'a':
+                        key = keyval(optarg, &val, buf, sizeof(buf));
+                        r = udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add sysattr match '%s=%s': %m", key, val);
+                                return 2;
+                        }
+                        break;
+                case 'A':
+                        key = keyval(optarg, &val, buf, sizeof(buf));
+                        r = udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add negative sysattr match '%s=%s': %m", key, val);
+                                return 2;
+                        }
+                        break;
+                case 'p':
+                        key = keyval(optarg, &val, buf, sizeof(buf));
+                        r = udev_enumerate_add_match_property(udev_enumerate, key, val);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add property match '%s=%s': %m", key, val);
+                                return 2;
+                        }
+                        break;
+                case 'g':
+                        r = udev_enumerate_add_match_tag(udev_enumerate, optarg);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add tag match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                case 'y':
+                        r = udev_enumerate_add_match_sysname(udev_enumerate, optarg);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add sysname match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                case 'b': {
+                        _cleanup_udev_device_unref_ struct udev_device *dev;
+
+                        dev = find_device(udev, optarg, "/sys");
+                        if (dev == NULL) {
+                                log_error("unable to open the device '%s'", optarg);
+                                return 2;
+                        }
+
+                        r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add parent match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                }
+
+                case ARG_NAME: {
+                        _cleanup_udev_device_unref_ struct udev_device *dev;
+
+                        dev = find_device(udev, optarg, "/dev/");
+                        if (dev == NULL) {
+                                log_error("unable to open the device '%s'", optarg);
+                                return 2;
+                        }
+
+                        r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+                        if (r < 0) {
+                                log_error_errno(r, "could not add parent match '%s': %m", optarg);
+                                return 2;
+                        }
+                        break;
+                }
+
+                case 'h':
+                        help();
+                        return 0;
+                case '?':
+                        return 1;
+                default:
+                        assert_not_reached("Unknown option");
+                }
+        }
+
+        for (; optind < argc; optind++) {
+                _cleanup_udev_device_unref_ struct udev_device *dev;
+
+                dev = find_device(udev, argv[optind], NULL);
+                if (dev == NULL) {
+                        log_error("unable to open the device '%s'", argv[optind]);
+                        return 2;
+                }
+
+                r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+                if (r < 0) {
+                        log_error_errno(r, "could not add tag match '%s': %m", optarg);
+                        return 2;
+                }
+        }
+
+        switch (device_type) {
+        case TYPE_SUBSYSTEMS:
+                udev_enumerate_scan_subsystems(udev_enumerate);
+                exec_list(udev_enumerate, action);
+                return 0;
+        case TYPE_DEVICES:
+                udev_enumerate_scan_devices(udev_enumerate);
+                exec_list(udev_enumerate, action);
+                return 0;
+        default:
+                assert_not_reached("device_type");
+        }
+}
+
+const struct udevadm_cmd udevadm_trigger = {
+        .name = "trigger",
+        .cmd = adm_trigger,
+        .help = "Request events from the kernel",
+};
diff --git a/src/grp-udev/udevadm/udevadm-util.c b/src/grp-udev/udevadm/udevadm-util.c
new file mode 100644
index 0000000000..3539c1d6ab
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-util.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "string-util.h"
+#include "udevadm-util.h"
+
+struct udev_device *find_device(struct udev *udev,
+                                const char *id,
+                                const char *prefix) {
+
+        assert(udev);
+        assert(id);
+
+        if (prefix && !startswith(id, prefix))
+                id = strjoina(prefix, id);
+
+        if (startswith(id, "/dev/")) {
+                struct stat statbuf;
+                char type;
+
+                if (stat(id, &statbuf) < 0)
+                        return NULL;
+
+                if (S_ISBLK(statbuf.st_mode))
+                        type = 'b';
+                else if (S_ISCHR(statbuf.st_mode))
+                        type = 'c';
+                else
+                        return NULL;
+
+                return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
+        } else if (startswith(id, "/sys/"))
+                return udev_device_new_from_syspath(udev, id);
+        else
+                return NULL;
+}
diff --git a/src/grp-udev/udevadm/udevadm-util.h b/src/grp-udev/udevadm/udevadm-util.h
new file mode 100644
index 0000000000..dc712b0d93
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-util.h
@@ -0,0 +1,24 @@
+#pragma once
+
+/*
+ * Copyright (C) 2014 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "udev.h"
+
+struct udev_device *find_device(struct udev *udev,
+                                const char *id,
+                                const char *prefix);
diff --git a/src/grp-udev/udevadm/udevadm.c b/src/grp-udev/udevadm/udevadm.c
new file mode 100644
index 0000000000..a6a873e5de
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2007-2012 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "selinux-util.h"
+#include "string-util.h"
+#include "udev.h"
+
+static int adm_version(struct udev *udev, int argc, char *argv[]) {
+        printf("%s\n", VERSION);
+        return 0;
+}
+
+static const struct udevadm_cmd udevadm_version = {
+        .name = "version",
+        .cmd = adm_version,
+};
+
+static int adm_help(struct udev *udev, int argc, char *argv[]);
+
+static const struct udevadm_cmd udevadm_help = {
+        .name = "help",
+        .cmd = adm_help,
+};
+
+static const struct udevadm_cmd *udevadm_cmds[] = {
+        &udevadm_info,
+        &udevadm_trigger,
+        &udevadm_settle,
+        &udevadm_control,
+        &udevadm_monitor,
+        &udevadm_hwdb,
+        &udevadm_test,
+        &udevadm_test_builtin,
+        &udevadm_version,
+        &udevadm_help,
+};
+
+static int adm_help(struct udev *udev, int argc, char *argv[]) {
+        unsigned int i;
+
+        printf("%s [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n\n"
+               "Send control commands or test the device manager.\n\n"
+               "Commands:\n"
+               , program_invocation_short_name);
+
+        for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
+                if (udevadm_cmds[i]->help != NULL)
+                        printf("  %-12s  %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
+        return 0;
+}
+
+static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[]) {
+        if (cmd->debug)
+                log_set_max_level(LOG_DEBUG);
+        log_debug("calling: %s", cmd->name);
+        return cmd->cmd(udev, argc, argv);
+}
+
+int main(int argc, char *argv[]) {
+        struct udev *udev;
+        static const struct option options[] = {
+                { "debug", no_argument, NULL, 'd' },
+                { "help", no_argument, NULL, 'h' },
+                { "version", no_argument, NULL, 'V' },
+                {}
+        };
+        const char *command;
+        unsigned int i;
+        int rc = 1, c;
+
+        udev = udev_new();
+        if (udev == NULL)
+                goto out;
+
+        log_parse_environment();
+        log_open();
+        mac_selinux_init();
+
+        while ((c = getopt_long(argc, argv, "+dhV", options, NULL)) >= 0)
+                switch (c) {
+
+                case 'd':
+                        log_set_max_level(LOG_DEBUG);
+                        break;
+
+                case 'h':
+                        rc = adm_help(udev, argc, argv);
+                        goto out;
+
+                case 'V':
+                        rc = adm_version(udev, argc, argv);
+                        goto out;
+
+                default:
+                        goto out;
+                }
+
+        command = argv[optind];
+
+        if (command != NULL)
+                for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
+                        if (streq(udevadm_cmds[i]->name, command)) {
+                                argc -= optind;
+                                argv += optind;
+                                /* we need '0' here to reset the internal state */
+                                optind = 0;
+                                rc = run_command(udev, udevadm_cmds[i], argc, argv);
+                                goto out;
+                        }
+
+        fprintf(stderr, "%s: missing or unknown command\n", program_invocation_short_name);
+        rc = 2;
+out:
+        mac_selinux_finish();
+        udev_unref(udev);
+        log_close();
+        return rc;
+}
diff --git a/src/grp-udev/v4l_id/Makefile b/src/grp-udev/v4l_id/Makefile
new file mode 100644
index 0000000000..0641af8065
--- /dev/null
+++ b/src/grp-udev/v4l_id/Makefile
@@ -0,0 +1,38 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+v4l_id_SOURCES = \
+	src/udev/v4l_id/v4l_id.c
+
+v4l_id_LDADD = \
+	libshared.la
+
+udevlibexec_PROGRAMS += \
+	v4l_id
+
+dist_udevrules_DATA += \
+	rules/60-persistent-v4l.rules
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/grp-udev/v4l_id/v4l_id.c b/src/grp-udev/v4l_id/v4l_id.c
new file mode 100644
index 0000000000..aec6676a33
--- /dev/null
+++ b/src/grp-udev/v4l_id/v4l_id.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2009 Kay Sievers <kay@vrfy.org>
+ * Copyright (c) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details:
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <linux/videodev2.h>
+
+#include "fd-util.h"
+#include "util.h"
+
+int main(int argc, char *argv[]) {
+        static const struct option options[] = {
+                { "help", no_argument, NULL, 'h' },
+                {}
+        };
+        _cleanup_close_ int fd = -1;
+        char *device;
+        struct v4l2_capability v2cap;
+        int c;
+
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+                switch (c) {
+                case 'h':
+                        printf("%s [-h,--help] <device file>\n\n"
+                               "Video4Linux device identification.\n\n"
+                               "  -h  Print this message\n"
+                               , program_invocation_short_name);
+                        return 0;
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        device = argv[optind];
+        if (device == NULL)
+                return 2;
+
+        fd = open(device, O_RDONLY);
+        if (fd < 0)
+                return 3;
+
+        if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) {
+                printf("ID_V4L_VERSION=2\n");
+                printf("ID_V4L_PRODUCT=%s\n", v2cap.card);
+                printf("ID_V4L_CAPABILITIES=:");
+                if ((v2cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) > 0)
+                        printf("capture:");
+                if ((v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) > 0)
+                        printf("video_output:");
+                if ((v2cap.capabilities & V4L2_CAP_VIDEO_OVERLAY) > 0)
+                        printf("video_overlay:");
+                if ((v2cap.capabilities & V4L2_CAP_AUDIO) > 0)
+                        printf("audio:");
+                if ((v2cap.capabilities & V4L2_CAP_TUNER) > 0)
+                        printf("tuner:");
+                if ((v2cap.capabilities & V4L2_CAP_RADIO) > 0)
+                        printf("radio:");
+                printf("\n");
+        }
+
+        return 0;
+}