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-rw-r--r--src/udev/cdrom_id/cdrom_id.c1048
1 files changed, 1048 insertions, 0 deletions
diff --git a/src/udev/cdrom_id/cdrom_id.c b/src/udev/cdrom_id/cdrom_id.c
new file mode 100644
index 0000000..aed24a3
--- /dev/null
+++ b/src/udev/cdrom_id/cdrom_id.c
@@ -0,0 +1,1048 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * cdrom_id - optical drive and media information prober
+ */
+
+#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 "log.h"
+#include "random-util.h"
+#include "udev-util.h"
+#include "util.h"
+
+/* device info */
+static unsigned cd_cd_rom;
+static unsigned cd_cd_r;
+static unsigned cd_cd_rw;
+static unsigned cd_dvd_rom;
+static unsigned cd_dvd_r;
+static unsigned cd_dvd_rw;
+static unsigned cd_dvd_ram;
+static unsigned cd_dvd_plus_r;
+static unsigned cd_dvd_plus_rw;
+static unsigned cd_dvd_plus_r_dl;
+static unsigned cd_dvd_plus_rw_dl;
+static unsigned cd_bd;
+static unsigned cd_bd_r;
+static unsigned cd_bd_re;
+static unsigned cd_hddvd;
+static unsigned cd_hddvd_r;
+static unsigned cd_hddvd_rw;
+static unsigned cd_mo;
+static unsigned cd_mrw;
+static unsigned cd_mrw_w;
+
+/* media info */
+static unsigned cd_media;
+static unsigned cd_media_cd_rom;
+static unsigned cd_media_cd_r;
+static unsigned cd_media_cd_rw;
+static unsigned cd_media_dvd_rom;
+static unsigned cd_media_dvd_r;
+static unsigned cd_media_dvd_rw;
+static unsigned cd_media_dvd_rw_ro; /* restricted overwrite mode */
+static unsigned cd_media_dvd_rw_seq; /* sequential mode */
+static unsigned cd_media_dvd_ram;
+static unsigned cd_media_dvd_plus_r;
+static unsigned cd_media_dvd_plus_rw;
+static unsigned cd_media_dvd_plus_r_dl;
+static unsigned cd_media_dvd_plus_rw_dl;
+static unsigned cd_media_bd;
+static unsigned cd_media_bd_r;
+static unsigned cd_media_bd_re;
+static unsigned cd_media_hddvd;
+static unsigned cd_media_hddvd_r;
+static unsigned cd_media_hddvd_rw;
+static unsigned cd_media_mo;
+static unsigned cd_media_mrw;
+static unsigned cd_media_mrw_w;
+
+static const char *cd_media_state = NULL;
+static unsigned cd_media_session_next;
+static unsigned cd_media_session_count;
+static unsigned cd_media_track_count;
+static unsigned cd_media_track_count_data;
+static unsigned 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(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 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 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 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(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(int fd) {
+ struct scsi_cmd sc;
+ int err;
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x1b);
+ scsi_cmd_set(&sc, 4, 0x02);
+ scsi_cmd_set(&sc, 5, 0);
+ err = scsi_cmd_run(&sc, fd, NULL, 0);
+ if ((err != 0)) {
+ info_scsi_cmd_err("START_STOP_UNIT", err);
+ return -1;
+ }
+ return 0;
+}
+
+static int cd_capability_compat(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(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(int fd) {
+ struct scsi_cmd sc;
+ unsigned char inq[128];
+ int err;
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x12);
+ scsi_cmd_set(&sc, 4, 36);
+ scsi_cmd_set(&sc, 5, 0);
+ err = scsi_cmd_run(&sc, fd, inq, 36);
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(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(const unsigned char *profiles, size_t size) {
+ unsigned 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(int fd) {
+ struct scsi_cmd sc;
+ int err;
+
+ unsigned char header[32];
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x51);
+ scsi_cmd_set(&sc, 8, sizeof(header));
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(int fd) {
+ struct scsi_cmd sc;
+ unsigned char features[65530];
+ unsigned cur_profile = 0;
+ unsigned len;
+ unsigned i;
+ int err;
+ int ret;
+
+ ret = -1;
+
+ /* First query the current profile */
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x46);
+ scsi_cmd_set(&sc, 8, 8);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, features, 8);
+ if ((err != 0)) {
+ info_scsi_cmd_err("GET CONFIGURATION", err);
+ /* handle pre-MMC2 drives which do not support GET CONFIGURATION */
+ if (SK(err) == 0x5 && IN_SET(ASC(err), 0x20, 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(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(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("cannot 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(&sc);
+ scsi_cmd_set(&sc, 0, 0x46);
+ scsi_cmd_set(&sc, 7, ( len >> 8 ) & 0xff);
+ scsi_cmd_set(&sc, 8, len & 0xff);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, features, len);
+ if ((err != 0)) {
+ info_scsi_cmd_err("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("cannot get features in a single query, truncating");
+ len = sizeof(features);
+ }
+
+ /* device features */
+ for (i = 8; i+4 < len; i += (4 + features[i+3])) {
+ unsigned 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(&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(int fd) {
+ struct scsi_cmd sc;
+ unsigned char header[32];
+ static const char *media_status[] = {
+ "blank",
+ "appendable",
+ "complete",
+ "other"
+ };
+ int err;
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x51);
+ scsi_cmd_set(&sc, 8, sizeof(header) & 0xff);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(&sc);
+ scsi_cmd_set(&sc, 0, 0xAD);
+ scsi_cmd_set(&sc, 7, 0xC0);
+ scsi_cmd_set(&sc, 9, sizeof(dvdstruct));
+ scsi_cmd_set(&sc, 11, 0);
+ err = scsi_cmd_run(&sc, fd, dvdstruct, sizeof(dvdstruct));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(&sc);
+ scsi_cmd_set(&sc, 0, 0x23);
+ scsi_cmd_set(&sc, 8, sizeof(format));
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, format, sizeof(format));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(&sc);
+ scsi_cmd_set(&sc, 0, 0x28);
+ scsi_cmd_set(&sc, 5, 0);
+ scsi_cmd_set(&sc, 8, 32);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, buffer, sizeof(buffer));
+ if ((err != 0)) {
+ cd_media = 0;
+ info_scsi_cmd_err("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(int fd) {
+ struct scsi_cmd sc;
+ unsigned char header[12];
+ unsigned char toc[65536];
+ unsigned len, i, num_tracks;
+ unsigned char *p;
+ int err;
+
+ scsi_cmd_init(&sc);
+ scsi_cmd_set(&sc, 0, 0x43);
+ scsi_cmd_set(&sc, 6, 1);
+ scsi_cmd_set(&sc, 8, sizeof(header) & 0xff);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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(&sc);
+ scsi_cmd_set(&sc, 0, 0x43);
+ scsi_cmd_set(&sc, 6, header[2]); /* First Track/Session Number */
+ scsi_cmd_set(&sc, 7, (len >> 8) & 0xff);
+ scsi_cmd_set(&sc, 8, len & 0xff);
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, toc, len);
+ if ((err != 0)) {
+ info_scsi_cmd_err("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 block;
+ unsigned 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(&sc);
+ scsi_cmd_set(&sc, 0, 0x43);
+ scsi_cmd_set(&sc, 2, 1); /* Session Info */
+ scsi_cmd_set(&sc, 8, sizeof(header));
+ scsi_cmd_set(&sc, 9, 0);
+ err = scsi_cmd_run(&sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err("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[]) {
+ 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_set_target(LOG_TARGET_AUTO);
+ udev_parse_config();
+ log_parse_environment();
+ log_open();
+
+ 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");
+ 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);
+ rc = 1;
+ goto exit;
+ }
+ log_debug("probing: '%s'", node);
+
+ /* same data as original cdrom_id */
+ if (cd_capability_compat(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(fd);
+
+ /* check if drive talks MMC */
+ if (cd_inquiry(fd) < 0)
+ goto work;
+
+ /* read drive and possibly current profile */
+ if (cd_profiles(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(fd);
+
+ /* get writable media state */
+ cd_media_info(fd);
+
+work:
+ /* lock the media, so we enable eject button events */
+ if (lock && cd_media) {
+ log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (lock)");
+ media_lock(fd, true);
+ }
+
+ if (unlock && cd_media) {
+ log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)");
+ media_lock(fd, false);
+ }
+
+ if (eject) {
+ log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)");
+ media_lock(fd, false);
+ log_debug("START_STOP_UNIT (eject)");
+ media_eject(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);
+ log_close();
+ return rc;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 09:55:52 +0000