diff options
Diffstat (limited to 'src/grp-initprogs/systemd-rfkill')
| -rw-r--r-- | src/grp-initprogs/systemd-rfkill/Makefile | 46 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-rfkill/rfkill.c | 427 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.in | 21 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.xml | 90 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-rfkill/systemd-rfkill.socket | 19 |
5 files changed, 603 insertions, 0 deletions
diff --git a/src/grp-initprogs/systemd-rfkill/Makefile b/src/grp-initprogs/systemd-rfkill/Makefile new file mode 100644 index 0000000000..32fb516b52 --- /dev/null +++ b/src/grp-initprogs/systemd-rfkill/Makefile @@ -0,0 +1,46 @@ +# -*- 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 $(topsrcdir)/build-aux/Makefile.head.mk + +ifneq ($(ENABLE_RFKILL),) +rootlibexec_PROGRAMS += \ + systemd-rfkill + +nodist_systemunit_DATA += \ + units/systemd-rfkill.service + +dist_systemunit_DATA += \ + units/systemd-rfkill.socket + +systemd_rfkill_SOURCES = \ + src/rfkill/rfkill.c + +systemd_rfkill_LDADD = \ + libsystemd-shared.la +endif # ENABLE_RFKILL + +EXTRA_DIST += \ + units/systemd-rfkill.service.in + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-initprogs/systemd-rfkill/rfkill.c b/src/grp-initprogs/systemd-rfkill/rfkill.c new file mode 100644 index 0000000000..6a463d0f92 --- /dev/null +++ b/src/grp-initprogs/systemd-rfkill/rfkill.c @@ -0,0 +1,427 @@ +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + 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 <poll.h> + +#include <linux/rfkill.h> + +#include <libudev.h> +#include <systemd/sd-daemon.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/escape.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/io-util.h" +#include "systemd-basic/mkdir.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/proc-cmdline.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/util.h" +#include "systemd-shared/udev-util.h" + +#define EXIT_USEC (5 * USEC_PER_SEC) + +static const char* const rfkill_type_table[NUM_RFKILL_TYPES] = { + [RFKILL_TYPE_ALL] = "all", + [RFKILL_TYPE_WLAN] = "wlan", + [RFKILL_TYPE_BLUETOOTH] = "bluetooth", + [RFKILL_TYPE_UWB] = "uwb", + [RFKILL_TYPE_WIMAX] = "wimax", + [RFKILL_TYPE_WWAN] = "wwan", + [RFKILL_TYPE_GPS] = "gps", + [RFKILL_TYPE_FM] = "fm", + [RFKILL_TYPE_NFC] = "nfc", +}; + +DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(rfkill_type, int); + +static int find_device( + struct udev *udev, + const struct rfkill_event *event, + struct udev_device **ret) { + + _cleanup_free_ char *sysname = NULL; + struct udev_device *device; + const char *name; + + assert(udev); + assert(event); + assert(ret); + + if (asprintf(&sysname, "rfkill%i", event->idx) < 0) + return log_oom(); + + device = udev_device_new_from_subsystem_sysname(udev, "rfkill", sysname); + if (!device) + return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno, "Failed to open device: %m"); + + name = udev_device_get_sysattr_value(device, "name"); + if (!name) { + log_debug("Device has no name, ignoring."); + udev_device_unref(device); + return -ENOENT; + } + + log_debug("Operating on rfkill device '%s'.", name); + + *ret = device; + return 0; +} + +static int wait_for_initialized( + struct udev *udev, + struct udev_device *device, + struct udev_device **ret) { + + _cleanup_udev_monitor_unref_ struct udev_monitor *monitor = NULL; + struct udev_device *d; + const char *sysname; + int watch_fd, r; + + assert(udev); + assert(device); + assert(ret); + + if (udev_device_get_is_initialized(device) != 0) { + *ret = udev_device_ref(device); + return 0; + } + + assert_se(sysname = udev_device_get_sysname(device)); + + /* Wait until the device is initialized, so that we can get + * access to the ID_PATH property */ + + monitor = udev_monitor_new_from_netlink(udev, "udev"); + if (!monitor) + return log_error_errno(errno, "Failed to acquire monitor: %m"); + + r = udev_monitor_filter_add_match_subsystem_devtype(monitor, "rfkill", NULL); + if (r < 0) + return log_error_errno(r, "Failed to add rfkill udev match to monitor: %m"); + + r = udev_monitor_enable_receiving(monitor); + if (r < 0) + return log_error_errno(r, "Failed to enable udev receiving: %m"); + + watch_fd = udev_monitor_get_fd(monitor); + if (watch_fd < 0) + return log_error_errno(watch_fd, "Failed to get watch fd: %m"); + + /* Check again, maybe things changed */ + d = udev_device_new_from_subsystem_sysname(udev, "rfkill", sysname); + if (!d) + return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno, "Failed to open device: %m"); + + if (udev_device_get_is_initialized(d) != 0) { + *ret = d; + return 0; + } + + for (;;) { + _cleanup_udev_device_unref_ struct udev_device *t = NULL; + + r = fd_wait_for_event(watch_fd, POLLIN, USEC_INFINITY); + if (r == -EINTR) + continue; + if (r < 0) + return log_error_errno(r, "Failed to watch udev monitor: %m"); + + t = udev_monitor_receive_device(monitor); + if (!t) + continue; + + if (streq_ptr(udev_device_get_sysname(device), sysname)) { + *ret = udev_device_ref(t); + return 0; + } + } +} + +static int determine_state_file( + struct udev *udev, + const struct rfkill_event *event, + struct udev_device *d, + char **ret) { + + _cleanup_udev_device_unref_ struct udev_device *device = NULL; + const char *path_id, *type; + char *state_file; + int r; + + assert(event); + assert(d); + assert(ret); + + r = wait_for_initialized(udev, d, &device); + if (r < 0) + return r; + + assert_se(type = rfkill_type_to_string(event->type)); + + path_id = udev_device_get_property_value(device, "ID_PATH"); + if (path_id) { + _cleanup_free_ char *escaped_path_id = NULL; + + escaped_path_id = cescape(path_id); + if (!escaped_path_id) + return log_oom(); + + state_file = strjoin("/var/lib/systemd/rfkill/", escaped_path_id, ":", type, NULL); + } else + state_file = strjoin("/var/lib/systemd/rfkill/", type, NULL); + + if (!state_file) + return log_oom(); + + *ret = state_file; + return 0; +} + +static int load_state( + int rfkill_fd, + struct udev *udev, + const struct rfkill_event *event) { + + _cleanup_udev_device_unref_ struct udev_device *device = NULL; + _cleanup_free_ char *state_file = NULL, *value = NULL; + struct rfkill_event we; + ssize_t l; + int b, r; + + assert(rfkill_fd >= 0); + assert(udev); + assert(event); + + if (shall_restore_state() == 0) + return 0; + + r = find_device(udev, event, &device); + if (r < 0) + return r; + + r = determine_state_file(udev, event, device, &state_file); + if (r < 0) + return r; + + r = read_one_line_file(state_file, &value); + if (r == -ENOENT) { + /* No state file? Then save the current state */ + + r = write_string_file(state_file, one_zero(event->soft), WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); + if (r < 0) + return log_error_errno(r, "Failed to write state file %s: %m", state_file); + + log_debug("Saved state '%s' to %s.", one_zero(event->soft), state_file); + return 0; + } + if (r < 0) + return log_error_errno(r, "Failed to read state file %s: %m", state_file); + + b = parse_boolean(value); + if (b < 0) + return log_error_errno(b, "Failed to parse state file %s: %m", state_file); + + we = (struct rfkill_event) { + .op = RFKILL_OP_CHANGE, + .idx = event->idx, + .soft = b, + }; + + l = write(rfkill_fd, &we, sizeof(we)); + if (l < 0) + return log_error_errno(errno, "Failed to restore rfkill state for %i: %m", event->idx); + if (l != sizeof(we)) { + log_error("Couldn't write rfkill event structure, too short."); + return -EIO; + } + + log_debug("Loaded state '%s' from %s.", one_zero(b), state_file); + return 0; +} + +static int save_state( + int rfkill_fd, + struct udev *udev, + const struct rfkill_event *event) { + + _cleanup_udev_device_unref_ struct udev_device *device = NULL; + _cleanup_free_ char *state_file = NULL; + int r; + + assert(rfkill_fd >= 0); + assert(udev); + assert(event); + + r = find_device(udev, event, &device); + if (r < 0) + return r; + + r = determine_state_file(udev, event, device, &state_file); + if (r < 0) + return r; + + r = write_string_file(state_file, one_zero(event->soft), WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); + if (r < 0) + return log_error_errno(r, "Failed to write state file %s: %m", state_file); + + log_debug("Saved state '%s' to %s.", one_zero(event->soft), state_file); + return 0; +} + +int main(int argc, char *argv[]) { + _cleanup_udev_unref_ struct udev *udev = NULL; + _cleanup_close_ int rfkill_fd = -1; + bool ready = false; + int r, n; + + if (argc > 1) { + log_error("This program requires no arguments."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + + udev = udev_new(); + if (!udev) { + r = log_oom(); + goto finish; + } + + r = mkdir_p("/var/lib/systemd/rfkill", 0755); + if (r < 0) { + log_error_errno(r, "Failed to create rfkill directory: %m"); + goto finish; + } + + n = sd_listen_fds(false); + if (n < 0) { + r = log_error_errno(n, "Failed to determine whether we got any file descriptors passed: %m"); + goto finish; + } + if (n > 1) { + log_error("Got too many file descriptors."); + r = -EINVAL; + goto finish; + } + + if (n == 0) { + rfkill_fd = open("/dev/rfkill", O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); + if (rfkill_fd < 0) { + if (errno == ENOENT) { + log_debug_errno(errno, "Missing rfkill subsystem, or no device present, exiting."); + r = 0; + goto finish; + } + + r = log_error_errno(errno, "Failed to open /dev/rfkill: %m"); + goto finish; + } + } else { + rfkill_fd = SD_LISTEN_FDS_START; + + r = fd_nonblock(rfkill_fd, 1); + if (r < 0) { + log_error_errno(r, "Failed to make /dev/rfkill socket non-blocking: %m"); + goto finish; + } + } + + for (;;) { + struct rfkill_event event; + const char *type; + ssize_t l; + + l = read(rfkill_fd, &event, sizeof(event)); + if (l < 0) { + if (errno == EAGAIN) { + + if (!ready) { + /* Notify manager that we are + * now finished with + * processing whatever was + * queued */ + (void) sd_notify(false, "READY=1"); + ready = true; + } + + /* Hang around for a bit, maybe there's more coming */ + + r = fd_wait_for_event(rfkill_fd, POLLIN, EXIT_USEC); + if (r == -EINTR) + continue; + if (r < 0) { + log_error_errno(r, "Failed to poll() on device: %m"); + goto finish; + } + if (r > 0) + continue; + + log_debug("All events read and idle, exiting."); + break; + } + + log_error_errno(errno, "Failed to read from /dev/rfkill: %m"); + } + + if (l != RFKILL_EVENT_SIZE_V1) { + log_error("Read event structure of invalid size."); + r = -EIO; + goto finish; + } + + type = rfkill_type_to_string(event.type); + if (!type) { + log_debug("An rfkill device of unknown type %i discovered, ignoring.", event.type); + continue; + } + + switch (event.op) { + + case RFKILL_OP_ADD: + log_debug("A new rfkill device has been added with index %i and type %s.", event.idx, type); + (void) load_state(rfkill_fd, udev, &event); + break; + + case RFKILL_OP_DEL: + log_debug("An rfkill device has been removed with index %i and type %s", event.idx, type); + break; + + case RFKILL_OP_CHANGE: + log_debug("An rfkill device has changed state with index %i and type %s", event.idx, type); + (void) save_state(rfkill_fd, udev, &event); + break; + + default: + log_debug("Unknown event %i from /dev/rfkill for index %i and type %s, ignoring.", event.op, event.idx, type); + break; + } + } + + r = 0; + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.in b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.in new file mode 100644 index 0000000000..780a19b996 --- /dev/null +++ b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.in @@ -0,0 +1,21 @@ +# This file is part of systemd. +# +# 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. + +[Unit] +Description=Load/Save RF Kill Switch Status +Documentation=man:systemd-rfkill.service(8) +DefaultDependencies=no +RequiresMountsFor=/var/lib/systemd/rfkill +BindsTo=sys-devices-virtual-misc-rfkill.device +Conflicts=shutdown.target +After=sys-devices-virtual-misc-rfkill.device systemd-remount-fs.service +Before=shutdown.target + +[Service] +Type=notify +ExecStart=@rootlibexecdir@/systemd-rfkill +TimeoutSec=30s diff --git a/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.xml b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.xml new file mode 100644 index 0000000000..f464842700 --- /dev/null +++ b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.service.xml @@ -0,0 +1,90 @@ +<?xml version="1.0"?> +<!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + 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/>. +--> +<refentry id="systemd-rfkill.service" conditional='ENABLE_RFKILL'> + + <refentryinfo> + <title>systemd-rfkill.service</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-rfkill.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-rfkill.service</refname> + <refname>systemd-rfkill.socket</refname> + <refname>systemd-rfkill</refname> + <refpurpose>Load and save the RF kill switch state at boot and change</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-rfkill.service</filename></para> + <para><filename>systemd-rfkill.socket</filename></para> + <para><filename>/usr/lib/systemd/systemd-rfkill</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><filename>systemd-rfkill.service</filename> is a service + that restores the RF kill switch state at early boot and saves it + on each change. On disk, the RF kill switch state is stored in + <filename>/var/lib/systemd/rfkill/</filename>.</para> + </refsect1> + + <refsect1> + <title>Kernel Command Line</title> + + <para><filename>systemd-rfkill</filename> understands the + following kernel command line parameter:</para> + + <variablelist class='kernel-commandline-options'> + <varlistentry> + <term><varname>systemd.restore_state=</varname></term> + + <listitem><para>Takes a boolean argument. Defaults to + <literal>1</literal>. If <literal>0</literal>, does not + restore the rfkill settings on boot. However, settings will + still be stored on shutdown. </para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> diff --git a/src/grp-initprogs/systemd-rfkill/systemd-rfkill.socket b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.socket new file mode 100644 index 0000000000..20ae2f8adb --- /dev/null +++ b/src/grp-initprogs/systemd-rfkill/systemd-rfkill.socket @@ -0,0 +1,19 @@ +# This file is part of systemd. +# +# 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. + +[Unit] +Description=Load/Save RF Kill Switch Status /dev/rfkill Watch +Documentation=man:systemd-rfkill.socket(8) +DefaultDependencies=no +BindsTo=sys-devices-virtual-misc-rfkill.device +After=sys-devices-virtual-misc-rfkill.device +Conflicts=shutdown.target +Before=shutdown.target + +[Socket] +ListenSpecial=/dev/rfkill +Writable=yes |