#ifndef _GNU_SOURCE

#define _GNU_SOURCE 1

#endif

#include <stdio.h>

#include <stddef.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <limits.h>

#include <fcntl.h>

#include <errno.h>

#include <getopt.h>

#include <time.h>

#include <scsi/sg.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <sys/time.h>

#include <sys/ioctl.h>

#include <linux/cdrom.h>

#include "libudev.h"

#include "libudev-private.h"

static int debug;

static void log_fn(struct udev *udev, int priority,

const char *file, int line, const char *fn,

const char *format, va_list args)

{

if (debug) {

fprintf(stderr, "%s: ", fn);

vfprintf(stderr, format, args);

} else {

vsyslog(priority, format, args);

}

}

static unsigned int cd_cd_rom = 0;

static unsigned int cd_cd_r = 0;

static unsigned int cd_cd_rw = 0;

static unsigned int cd_dvd_rom = 0;

static unsigned int cd_dvd_r = 0;

static unsigned int cd_dvd_rw = 0;

static unsigned int cd_dvd_ram = 0;

static unsigned int cd_dvd_plus_r = 0;

static unsigned int cd_dvd_plus_rw = 0;

static unsigned int cd_dvd_plus_r_dl = 0;

static unsigned int cd_dvd_plus_rw_dl = 0;

static unsigned int cd_bd = 0;

static unsigned int cd_bd_r = 0;

static unsigned int cd_bd_re = 0;

static unsigned int cd_hddvd = 0;

static unsigned int cd_hddvd_r = 0;

static unsigned int cd_hddvd_rw = 0;

static unsigned int cd_mo = 0;

static unsigned int cd_mrw = 0;

static unsigned int cd_mrw_w = 0;

static unsigned int cd_media = 0;

static unsigned int cd_media_cd_rom = 0;

static unsigned int cd_media_cd_r = 0;

static unsigned int cd_media_cd_rw = 0;

static unsigned int cd_media_dvd_rom = 0;

static unsigned int cd_media_dvd_r = 0;

static unsigned int cd_media_dvd_rw = 0;

static unsigned int cd_media_dvd_ram = 0;

static unsigned int cd_media_dvd_plus_r = 0;

static unsigned int cd_media_dvd_plus_rw = 0;

static unsigned int cd_media_dvd_plus_r_dl = 0;

static unsigned int cd_media_dvd_plus_rw_dl = 0;

static unsigned int cd_media_bd = 0;

static unsigned int cd_media_bd_r = 0;

static unsigned int cd_media_bd_re = 0;

static unsigned int cd_media_hddvd = 0;

static unsigned int cd_media_hddvd_r = 0;

static unsigned int cd_media_hddvd_rw = 0;

static unsigned int cd_media_mo = 0;

static unsigned int cd_media_mrw = 0;

static unsigned int cd_media_mrw_w = 0;

static const char *cd_media_state = NULL;

static unsigned int cd_media_session_next = 0;

static unsigned int cd_media_session_count = 0;

static unsigned int cd_media_track_count = 0;

static unsigned int cd_media_track_count_data = 0;

static unsigned int cd_media_track_count_audio = 0;

static unsigned long long int cd_media_session_last_offset = 0;

#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 int is_mounted(const char *device)

{

struct stat statbuf;

FILE *fp;

int maj, min;

int mounted = 0;

if (stat(device, &statbuf) < 0)

return -ENODEV;

fp = fopen("/proc/self/mountinfo", "r");

if (fp == NULL)

return -ENOSYS;

while (fscanf(fp, "%*s %*s %i:%i %*[^\n]", &maj, &min) == 2) {

if (makedev(maj, min) == statbuf.st_rdev) {

mounted = 1;

break;

}

}

fclose(fp);

return mounted;

}

static void info_scsi_cmd_err(struct udev *udev, char *cmd, int err)

{

if (err == -1) {

info(udev, "%s failed\n", cmd);

return;

}

info(udev, "%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh\n", 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_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg)

{

if (i == 0) {

memset(cmd, 0, sizeof(struct scsi_cmd));

cmd->cgc.quiet = 1;

cmd->cgc.sense = &cmd->_sense.s;

memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));

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;

}

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;

cmd->sg_io.dxferp = buf;

cmd->sg_io.dxfer_len = bufsize;

cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;

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 cd_capability_compat(struct udev *udev, int fd)

{

int capability;

capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL);

if (capability < 0) {

info(udev, "CDROM_GET_CAPABILITY failed\n");

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) {

info(udev, "CDROM_DRIVE_STATUS != CDS_DISC_OK\n");

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;

memset(inq, 0, sizeof(inq));

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) {

info(udev, "not an MMC unit\n");

return -1;

}

info(udev, "INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);

return 0;

}

static int cd_profiles(struct udev *udev, int fd)

{

struct scsi_cmd sc;

unsigned char header[8];

unsigned char profiles[512];

unsigned int cur_profile;

unsigned int len;

unsigned int i;

int err;

memset(header, 0, sizeof(header));

scsi_cmd_set(udev, &sc, 0, 0x46);

scsi_cmd_set(udev, &sc, 1, 0);

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, "GET CONFIGURATION", err);

return -1;

}

len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);

info(udev, "GET CONFIGURATION: number of profiles %i\n", len);

if (len > sizeof(profiles)) {

info(udev, "invalid number of profiles\n");

return -1;

}

memset(profiles, 0, sizeof(profiles));

scsi_cmd_set(udev, &sc, 0, 0x46);

scsi_cmd_set(udev, &sc, 1, 1);

scsi_cmd_set(udev, &sc, 6, len >> 16);

scsi_cmd_set(udev, &sc, 7, len >> 8);

scsi_cmd_set(udev, &sc, 8, len);

scsi_cmd_set(udev, &sc, 9, 0);

err = scsi_cmd_run(udev, &sc, fd, profiles, len);

if ((err < 0)) {

info_scsi_cmd_err(udev, "GET CONFIGURATION", err);

return -1;

}

/* device profiles */

for (i = 12; i < profiles[11]; i += 4) {

unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);

if (profile == 0)

continue;

info(udev, "profile 0x%02x\n", profile);

switch (profile) {

case 0x03:

case 0x04:

case 0x05:

cd_mo = 1;

break;

case 0x10:

cd_dvd_rom = 1;

break;

case 0x12:

cd_dvd_ram = 1;

break;

case 0x13:

case 0x14:

cd_dvd_rw = 1;

break;

case 0x1B:

cd_dvd_plus_r = 1;

break;

case 0x1A:

cd_dvd_plus_rw = 1;

break;

case 0x2A:

cd_dvd_plus_rw_dl = 1;

break;

case 0x2B:

cd_dvd_plus_r_dl = 1;

break;

case 0x40:

cd_bd = 1;

break;

case 0x41:

case 0x42:

cd_bd_r = 1;

break;

case 0x43:

cd_bd_re = 1;

break;

case 0x50:

cd_hddvd = 1;

break;

case 0x51:

cd_hddvd_r = 1;

break;

case 0x52:

cd_hddvd_rw = 1;

break;

default:

break;

}

}

/* current media profile */

cur_profile = header[6] << 8 | header[7];

info(udev, "current profile 0x%02x\n", cur_profile);

if (cur_profile == 0) {

info(udev, "no current profile, assuming no media\n");

return -1;

}

cd_media = 1;

switch (cur_profile) {

case 0x03:

case 0x04:

case 0x05:

cd_media_mo = 1;

break;

case 0x08:

cd_media_cd_rom = 1;

break;

case 0x09:

cd_media_cd_r = 1;

break;

case 0x0a:

cd_media_cd_rw = 1;

break;

case 0x10:

cd_media_dvd_rom = 1;

break;

case 0x11:

cd_media_dvd_r = 1;

break;

case 0x12:

cd_media_dvd_ram = 1;

break;

case 0x13:

case 0x14:

cd_media_dvd_rw = 1;

break;

case 0x1B:

cd_media_dvd_plus_r = 1;

break;

case 0x1A:

cd_media_dvd_plus_rw = 1;

break;

case 0x2A:

cd_media_dvd_plus_rw_dl = 1;

break;

case 0x2B:

cd_media_dvd_plus_r_dl = 1;

break;

case 0x40:

cd_media_bd = 1;

break;

case 0x41:

case 0x42:

cd_media_bd_r = 1;

break;

case 0x43:

cd_media_bd_re = 1;

break;

case 0x50:

cd_media_hddvd = 1;

break;

case 0x51:

cd_media_hddvd_r = 1;

break;

case 0x52:

cd_media_hddvd_rw = 1;

break;

default:

break;

}

return 0;

}

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;

memset(header, 0, sizeof(header));

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);

return -1;

};

info(udev, "disk type %02x\n", header[8]);

/* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */

if (!cd_media_cd_rom && (header[2] & 3) < 4)

cd_media_state = media_status[header[2] & 3];

if ((header[2] & 3) != 2)

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[2048];

unsigned int len, i;

unsigned char *p;

int err;

memset(header, 0, sizeof(header));

scsi_cmd_set(udev, &sc, 0, 0x43);

scsi_cmd_set(udev, &sc, 6, 1);

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", err);

return -1;

}

len = (header[0] << 8 | header[1]) + 2;

info(udev, "READ TOC: len: %d\n", len);

if (len > sizeof(toc))

return -1;

if (len < 2)

return -1;

/* empty media has no tracks */

if (len < 8)

return 0;

memset(toc, 0, sizeof(toc));

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);

scsi_cmd_set(udev, &sc, 8, len);

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;

}

for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {

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];

info(udev, "track=%u info=0x%x(%s) start_block=%u\n",

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++;

}

memset(header, 0, sizeof (header));

scsi_cmd_set(udev, &sc, 0, 0x43);

scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */

scsi_cmd_set(udev, &sc, 8, 12);

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];

info(udev, "last track %u starts at block %u\n", 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[] = {

{ "export", no_argument, NULL, 'x' },

{ "debug", no_argument, NULL, 'd' },

{ "help", no_argument, NULL, 'h' },

{}

};

const char *node = NULL;

int export = 0;

int fd = -1;

int cnt;

int rc = 0;

udev = udev_new();

if (udev == NULL)

goto exit;

udev_log_init("cdrom_id");

udev_set_log_fn(udev, log_fn);

while (1) {

int option;

option = getopt_long(argc, argv, "dxh", options, NULL);

if (option == -1)

break;

switch (option) {

case 'd':

debug = 1;

if (udev_get_log_priority(udev) < LOG_INFO)

udev_set_log_priority(udev, LOG_INFO);

break;

case 'x':

export = 1;

break;

case 'h':

printf("Usage: cdrom_id [options] <device>\n"

" --export export key/value pairs\n"

" --debug debug to stderr\n"

" --help print this help text\n\n");

goto exit;

default:

rc = 1;

goto exit;

}

}

node = argv[optind];

if (!node) {

err(udev, "no device\n");

fprintf(stderr, "no device\n");

rc = 1;

goto exit;

}

srand((unsigned int)getpid());

for (cnt = 20; cnt > 0; cnt--) {

struct timespec duration;

fd = open(node, O_RDONLY|O_NONBLOCK|(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) {

info(udev, "unable to open '%s'\n", node);

fprintf(stderr, "unable to open '%s'\n", node);

rc = 1;

goto exit;

}

info(udev, "probing: '%s'\n", 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

cd_media_compat(udev, fd);

/* check if drive talks MMC */

if (cd_inquiry(udev, fd) < 0)

goto print;

/* read drive and possibly current profile */

if (cd_profiles(udev, fd) < 0)

goto print;

/* get session/track info */

if (cd_media_toc(udev, fd) < 0)

goto print;

/* get writable media state */

if (cd_media_info(udev, fd) < 0)

goto print;

print:

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=%d\n", cd_media_session_next);

if (cd_media_session_count > 0)

printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);

if (cd_media_track_count > 0)

printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);

if (cd_media_track_count_audio > 0)

printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);

if (cd_media_track_count_data > 0)

printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);

if (cd_media_session_last_offset > 0)

printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);

exit:

if (fd >= 0)

close(fd);

udev_unref(udev);

udev_log_close();

return rc;

}