2 * cdrom_id - optical drive and media information prober
4 * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
35 #include <sys/types.h>
38 #include <sys/ioctl.h>
39 #include <linux/cdrom.h>
42 #include "libudev-private.h"
46 static void log_fn(struct udev *udev, int priority,
47 const char *file, int line, const char *fn,
48 const char *format, va_list args)
51 fprintf(stderr, "%s: ", fn);
52 vfprintf(stderr, format, args);
54 vsyslog(priority, format, args);
59 static unsigned int cd_cd_rom = 0;
60 static unsigned int cd_cd_r = 0;
61 static unsigned int cd_cd_rw = 0;
62 static unsigned int cd_dvd_rom = 0;
63 static unsigned int cd_dvd_r = 0;
64 static unsigned int cd_dvd_rw = 0;
65 static unsigned int cd_dvd_ram = 0;
66 static unsigned int cd_dvd_plus_r = 0;
67 static unsigned int cd_dvd_plus_rw = 0;
68 static unsigned int cd_dvd_plus_r_dl = 0;
69 static unsigned int cd_dvd_plus_rw_dl = 0;
70 static unsigned int cd_bd = 0;
71 static unsigned int cd_bd_r = 0;
72 static unsigned int cd_bd_re = 0;
73 static unsigned int cd_hddvd = 0;
74 static unsigned int cd_hddvd_r = 0;
75 static unsigned int cd_hddvd_rw = 0;
76 static unsigned int cd_mo = 0;
77 static unsigned int cd_mrw = 0;
78 static unsigned int cd_mrw_w = 0;
81 static unsigned int cd_media = 0;
82 static unsigned int cd_media_cd_rom = 0;
83 static unsigned int cd_media_cd_r = 0;
84 static unsigned int cd_media_cd_rw = 0;
85 static unsigned int cd_media_dvd_rom = 0;
86 static unsigned int cd_media_dvd_r = 0;
87 static unsigned int cd_media_dvd_rw = 0;
88 static unsigned int cd_media_dvd_ram = 0;
89 static unsigned int cd_media_dvd_plus_r = 0;
90 static unsigned int cd_media_dvd_plus_rw = 0;
91 static unsigned int cd_media_dvd_plus_r_dl = 0;
92 static unsigned int cd_media_dvd_plus_rw_dl = 0;
93 static unsigned int cd_media_bd = 0;
94 static unsigned int cd_media_bd_r = 0;
95 static unsigned int cd_media_bd_re = 0;
96 static unsigned int cd_media_hddvd = 0;
97 static unsigned int cd_media_hddvd_r = 0;
98 static unsigned int cd_media_hddvd_rw = 0;
99 static unsigned int cd_media_mo = 0;
100 static unsigned int cd_media_mrw = 0;
101 static unsigned int cd_media_mrw_w = 0;
103 static const char *cd_media_state = NULL;
104 static unsigned int cd_media_session_next = 0;
105 static unsigned int cd_media_session_count = 0;
106 static unsigned int cd_media_track_count = 0;
107 static unsigned int cd_media_track_count_data = 0;
108 static unsigned int cd_media_track_count_audio = 0;
109 static unsigned long long int cd_media_session_last_offset = 0;
111 #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13]))
112 #define SK(errcode) (((errcode) >> 16) & 0xF)
113 #define ASC(errcode) (((errcode) >> 8) & 0xFF)
114 #define ASCQ(errcode) ((errcode) & 0xFF)
116 static int is_mounted(const char *device)
123 if (stat(device, &statbuf) < 0)
126 fp = fopen("/proc/self/mountinfo", "r");
129 while (fscanf(fp, "%*s %*s %i:%i %*[^\n]", &maj, &min) == 2) {
130 if (makedev(maj, min) == statbuf.st_rdev) {
139 static void info_scsi_cmd_err(struct udev *udev, char *cmd, int err)
142 info(udev, "%s failed\n", cmd);
145 info(udev, "%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh\n", cmd, SK(err), ASC(err), ASCQ(err));
149 struct cdrom_generic_command cgc;
151 struct request_sense s;
154 struct sg_io_hdr sg_io;
157 static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg)
160 memset(cmd, 0x00, sizeof(struct scsi_cmd));
162 cmd->cgc.sense = &cmd->_sense.s;
163 memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));
164 cmd->sg_io.interface_id = 'S';
165 cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
166 cmd->sg_io.cmdp = cmd->cgc.cmd;
167 cmd->sg_io.sbp = cmd->_sense.u;
168 cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
170 cmd->sg_io.cmd_len = i + 1;
171 cmd->cgc.cmd[i] = arg;
174 #define CHECK_CONDITION 0x01
176 static int scsi_cmd_run(struct udev *udev, struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize)
180 cmd->sg_io.dxferp = buf;
181 cmd->sg_io.dxfer_len = bufsize;
182 cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
183 if (ioctl(fd, SG_IO, &cmd->sg_io))
186 if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) {
189 if (cmd->sg_io.masked_status & CHECK_CONDITION) {
190 ret = ERRCODE(cmd->_sense.u);
198 static int cd_capability_compat(struct udev *udev, int fd)
202 capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
203 if (capability < 0) {
204 info(udev, "CDROM_GET_CAPABILITY failed\n");
208 if (capability & CDC_CD_R)
210 if (capability & CDC_CD_RW)
212 if (capability & CDC_DVD)
214 if (capability & CDC_DVD_R)
216 if (capability & CDC_DVD_RAM)
218 if (capability & CDC_MRW)
220 if (capability & CDC_MRW_W)
225 static int cd_media_compat(struct udev *udev, int fd)
227 if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) != CDS_DISC_OK) {
228 info(udev, "CDROM_DRIVE_STATUS != CDS_DISC_OK\n");
235 static int cd_inquiry(struct udev *udev, int fd) {
237 unsigned char inq[128];
240 memset (inq, 0, sizeof (inq));
241 scsi_cmd_set(udev, &sc, 0, 0x12);
242 scsi_cmd_set(udev, &sc, 4, 36);
243 scsi_cmd_set(udev, &sc, 5, 0);
244 err = scsi_cmd_run(udev, &sc, fd, inq, 36);
246 info_scsi_cmd_err(udev, "INQUIRY", err);
250 if ((inq[0] & 0x1F) != 5) {
251 info(udev, "not an MMC unit\n");
255 info(udev, "INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);
259 static int cd_profiles(struct udev *udev, int fd)
262 unsigned char header[8];
263 unsigned char profiles[512];
264 unsigned int cur_profile;
269 memset (header, 0, sizeof (header));
270 scsi_cmd_set(udev, &sc, 0, 0x46);
271 scsi_cmd_set(udev, &sc, 1, 0);
272 scsi_cmd_set(udev, &sc, 8, sizeof(header));
273 scsi_cmd_set(udev, &sc, 9, 0);
274 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
276 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
280 len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
281 info(udev, "GET CONFIGURATION: number of profiles %i\n", len);
282 if (len > sizeof(profiles)) {
283 info(udev, "invalid number of profiles\n");
287 memset (profiles, 0, sizeof (profiles));
288 scsi_cmd_set(udev, &sc, 0, 0x46);
289 scsi_cmd_set(udev, &sc, 1, 1);
290 scsi_cmd_set(udev, &sc, 6, len >> 16);
291 scsi_cmd_set(udev, &sc, 7, len >> 8);
292 scsi_cmd_set(udev, &sc, 8, len);
293 scsi_cmd_set(udev, &sc, 9, 0);
294 err = scsi_cmd_run(udev, &sc, fd, profiles, len);
296 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
300 /* device profiles */
301 for (i = 12; i < profiles[11]; i += 4) {
302 unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
305 info(udev, "profile 0x%02x\n", profile);
330 cd_dvd_plus_rw_dl = 1;
333 cd_dvd_plus_r_dl = 1;
359 /* current media profile */
360 cur_profile = header[6] << 8 | header[7];
361 info(udev, "current profile 0x%02x\n", cur_profile);
362 if (cur_profile == 0) {
363 info(udev, "no current profile, assuming no media\n");
369 switch (cur_profile) {
385 cd_media_dvd_rom = 1;
391 cd_media_dvd_ram = 1;
398 cd_media_dvd_plus_r = 1;
401 cd_media_dvd_plus_rw = 1;
404 cd_media_dvd_plus_rw_dl = 1;
407 cd_media_dvd_plus_r_dl = 1;
423 cd_media_hddvd_r = 1;
426 cd_media_hddvd_rw = 1;
434 static int cd_media_info(struct udev *udev, int fd)
437 unsigned char header[32];
438 static const char *media_status[] = {
446 memset (header, 0, sizeof (header));
447 scsi_cmd_set(udev, &sc, 0, 0x51);
448 scsi_cmd_set(udev, &sc, 8, sizeof(header));
449 scsi_cmd_set(udev, &sc, 9, 0);
450 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
452 info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
456 info(udev, "disk type %02x\n", header[8]);
458 /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
459 if (!cd_media_cd_rom && (header[2] & 3) < 4)
460 cd_media_state = media_status[header[2] & 3];
462 if ((header[2] & 3) != 2)
463 cd_media_session_next = header[10] << 8 | header[5];
464 cd_media_session_count = header[9] << 8 | header[4];
465 cd_media_track_count = header[11] << 8 | header[6];
470 static int cd_media_toc(struct udev *udev, int fd)
473 unsigned char header[12];
474 unsigned char toc[2048];
479 memset (header, 0, sizeof (header));
480 scsi_cmd_set(udev, &sc, 0, 0x43);
481 scsi_cmd_set(udev, &sc, 6, 1);
482 scsi_cmd_set(udev, &sc, 8, sizeof(header));
483 scsi_cmd_set(udev, &sc, 9, 0);
484 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
486 info_scsi_cmd_err(udev, "READ TOC", err);
490 len = (header[0] << 8 | header[1]) + 2;
491 info(udev, "READ TOC: len: %d\n", len);
492 if (len > sizeof(toc))
497 /* empty media has no tracks */
501 memset (toc, 0, sizeof (toc));
502 scsi_cmd_set(udev, &sc, 0, 0x43);
503 scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
504 scsi_cmd_set(udev, &sc, 7, len >> 8);
505 scsi_cmd_set(udev, &sc, 8, len);
506 scsi_cmd_set(udev, &sc, 9, 0);
507 err = scsi_cmd_run(udev, &sc, fd, toc, len);
509 info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
513 for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
515 unsigned int is_data_track;
517 is_data_track = (p[1] & 0x04) != 0;
519 block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
520 info(udev, "track=%u info=0x%x(%s) start_block=%u\n",
521 p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
524 cd_media_track_count_data++;
526 cd_media_track_count_audio++;
529 memset (header, 0, sizeof (header));
530 scsi_cmd_set(udev, &sc, 0, 0x43);
531 scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
532 scsi_cmd_set(udev, &sc, 8, 12);
533 scsi_cmd_set(udev, &sc, 9, 0);
534 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
536 info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
539 len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
540 info(udev, "last track %u starts at block %u\n", header[4+2], len);
541 cd_media_session_last_offset = (unsigned long long int)len * 2048;
545 int main(int argc, char *argv[])
548 static const struct option options[] = {
549 { "export", no_argument, NULL, 'x' },
550 { "debug", no_argument, NULL, 'd' },
551 { "help", no_argument, NULL, 'h' },
554 const char *node = NULL;
564 udev_log_init("cdrom_id");
565 udev_set_log_fn(udev, log_fn);
570 option = getopt_long(argc, argv, "dxh", options, NULL);
577 if (udev_get_log_priority(udev) < LOG_INFO)
578 udev_set_log_priority(udev, LOG_INFO);
584 printf("Usage: cdrom_id [options] <device>\n"
585 " --export export key/value pairs\n"
586 " --debug debug to stderr\n"
587 " --help print this help text\n\n");
597 err(udev, "no device\n");
598 fprintf(stderr, "no device\n");
603 srand((unsigned int)getpid());
604 for (cnt = 20; cnt > 0; cnt--) {
605 struct timespec duration;
607 fd = open(node, O_RDONLY|O_NONBLOCK|(is_mounted(node) ? 0 : O_EXCL));
608 if (fd >= 0 || errno != EBUSY)
611 duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
612 nanosleep(&duration, NULL);
615 info(udev, "unable to open '%s'\n", node);
616 fprintf(stderr, "unable to open '%s'\n", node);
620 info(udev, "probing: '%s'\n", node);
622 /* same data as original cdrom_id */
623 if (cd_capability_compat(udev, fd) < 0) {
628 /* check for media - don't bail if there's no media as we still need to
629 * to read profiles */
630 cd_media_compat(udev, fd);
632 /* check if drive talks MMC */
633 if (cd_inquiry(udev, fd) < 0)
636 /* read drive and possibly current profile */
637 if (cd_profiles(udev, fd) < 0)
640 /* get session/track info */
641 if (cd_media_toc(udev, fd) < 0)
644 /* get writable media state */
645 if (cd_media_info(udev, fd) < 0)
649 printf("ID_CDROM=1\n");
651 printf("ID_CDROM_CD=1\n");
653 printf("ID_CDROM_CD_R=1\n");
655 printf("ID_CDROM_CD_RW=1\n");
657 printf("ID_CDROM_DVD=1\n");
659 printf("ID_CDROM_DVD_R=1\n");
661 printf("ID_CDROM_DVD_RW=1\n");
663 printf("ID_CDROM_DVD_RAM=1\n");
665 printf("ID_CDROM_DVD_PLUS_R=1\n");
667 printf("ID_CDROM_DVD_PLUS_RW=1\n");
668 if (cd_dvd_plus_r_dl)
669 printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
670 if (cd_dvd_plus_rw_dl)
671 printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
673 printf("ID_CDROM_BD=1\n");
675 printf("ID_CDROM_BD_R=1\n");
677 printf("ID_CDROM_BD_RE=1\n");
679 printf("ID_CDROM_HDDVD=1\n");
681 printf("ID_CDROM_HDDVD_R=1\n");
683 printf("ID_CDROM_HDDVD_RW=1\n");
685 printf("ID_CDROM_MO=1\n");
687 printf("ID_CDROM_MRW=1\n");
689 printf("ID_CDROM_MRW_W=1\n");
692 printf("ID_CDROM_MEDIA=1\n");
694 printf("ID_CDROM_MEDIA_MO=1\n");
696 printf("ID_CDROM_MEDIA_MRW=1\n");
698 printf("ID_CDROM_MEDIA_MRW_W=1\n");
700 printf("ID_CDROM_MEDIA_CD=1\n");
702 printf("ID_CDROM_MEDIA_CD_R=1\n");
704 printf("ID_CDROM_MEDIA_CD_RW=1\n");
705 if (cd_media_dvd_rom)
706 printf("ID_CDROM_MEDIA_DVD=1\n");
708 printf("ID_CDROM_MEDIA_DVD_R=1\n");
709 if (cd_media_dvd_ram)
710 printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
712 printf("ID_CDROM_MEDIA_DVD_RW=1\n");
713 if (cd_media_dvd_plus_r)
714 printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
715 if (cd_media_dvd_plus_rw)
716 printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
717 if (cd_media_dvd_plus_rw_dl)
718 printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
719 if (cd_media_dvd_plus_r_dl)
720 printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
722 printf("ID_CDROM_MEDIA_BD=1\n");
724 printf("ID_CDROM_MEDIA_BD_R=1\n");
726 printf("ID_CDROM_MEDIA_BD_RE=1\n");
728 printf("ID_CDROM_MEDIA_HDDVD=1\n");
729 if (cd_media_hddvd_r)
730 printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
731 if (cd_media_hddvd_rw)
732 printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
734 if (cd_media_state != NULL)
735 printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
736 if (cd_media_session_next > 0)
737 printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
738 if (cd_media_session_count > 0)
739 printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
740 if (cd_media_track_count > 0)
741 printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
742 if (cd_media_track_count_audio > 0)
743 printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);
744 if (cd_media_track_count_data > 0)
745 printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);
746 if (cd_media_session_last_offset > 0)
747 printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);