diff options
Diffstat (limited to 'src/grp-udev/cdrom_id')
| -rw-r--r-- | src/grp-udev/cdrom_id/60-cdrom_id.rules | 25 | ||||
| -rw-r--r-- | src/grp-udev/cdrom_id/Makefile | 38 | ||||
| -rw-r--r-- | src/grp-udev/cdrom_id/cdrom_id.c | 1086 |
3 files changed, 1149 insertions, 0 deletions
diff --git a/src/grp-udev/cdrom_id/60-cdrom_id.rules b/src/grp-udev/cdrom_id/60-cdrom_id.rules new file mode 100644 index 0000000000..5c3b52ebb9 --- /dev/null +++ b/src/grp-udev/cdrom_id/60-cdrom_id.rules @@ -0,0 +1,25 @@ +# do not edit this file, it will be overwritten on update + +ACTION=="remove", GOTO="cdrom_end" +SUBSYSTEM!="block", GOTO="cdrom_end" +KERNEL!="sr[0-9]*|xvd*", GOTO="cdrom_end" +ENV{DEVTYPE}!="disk", GOTO="cdrom_end" + +# unconditionally tag device as CDROM +KERNEL=="sr[0-9]*", ENV{ID_CDROM}="1" + +# media eject button pressed +ENV{DISK_EJECT_REQUEST}=="?*", RUN+="cdrom_id --eject-media $devnode", GOTO="cdrom_end" + +# import device and media properties and lock tray to +# enable the receiving of media eject button events +IMPORT{program}="cdrom_id --lock-media $devnode" + +# ejecting a CD does not remove the device node, so mark the systemd device +# unit as inactive while there is no medium; this automatically cleans up of +# stale mounts after ejecting +ENV{DISK_MEDIA_CHANGE}=="?*", ENV{ID_CDROM_MEDIA}!="?*", ENV{SYSTEMD_READY}="0" + +KERNEL=="sr0", SYMLINK+="cdrom", OPTIONS+="link_priority=-100" + +LABEL="cdrom_end" diff --git a/src/grp-udev/cdrom_id/Makefile b/src/grp-udev/cdrom_id/Makefile new file mode 100644 index 0000000000..87865dd938 --- /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 = \ + libsystemd-shared.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..4bd3ab0be0 --- /dev/null +++ b/src/grp-udev/cdrom_id/cdrom_id.c @@ -0,0 +1,1086 @@ +/* + * 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 <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 <linux/cdrom.h> + +#include <libudev.h> + +#include "libudev-private.h" +#include "systemd-basic/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; +} |