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 scsi_cmd_set(udev, &sc, 0, 0x12);
241 scsi_cmd_set(udev, &sc, 4, 36);
242 scsi_cmd_set(udev, &sc, 5, 0);
243 err = scsi_cmd_run(udev, &sc, fd, inq, 36);
245 info_scsi_cmd_err(udev, "INQUIRY", err);
249 if ((inq[0] & 0x1F) != 5) {
250 info(udev, "not an MMC unit\n");
254 info(udev, "INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);
258 static int cd_profiles(struct udev *udev, int fd)
261 unsigned char header[8];
262 unsigned char profiles[512];
263 unsigned int cur_profile;
268 scsi_cmd_set(udev, &sc, 0, 0x46);
269 scsi_cmd_set(udev, &sc, 1, 0);
270 scsi_cmd_set(udev, &sc, 8, sizeof(header));
271 scsi_cmd_set(udev, &sc, 9, 0);
272 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
274 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
278 len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
279 info(udev, "GET CONFIGURATION: number of profiles %i\n", len);
280 if (len > sizeof(profiles)) {
281 info(udev, "invalid number of profiles\n");
285 scsi_cmd_set(udev, &sc, 0, 0x46);
286 scsi_cmd_set(udev, &sc, 1, 1);
287 scsi_cmd_set(udev, &sc, 6, len >> 16);
288 scsi_cmd_set(udev, &sc, 7, len >> 8);
289 scsi_cmd_set(udev, &sc, 8, len);
290 scsi_cmd_set(udev, &sc, 9, 0);
291 err = scsi_cmd_run(udev, &sc, fd, profiles, len);
293 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
297 /* device profiles */
298 for (i = 12; i < profiles[11]; i += 4) {
299 unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
302 info(udev, "profile 0x%02x\n", profile);
327 cd_dvd_plus_rw_dl = 1;
330 cd_dvd_plus_r_dl = 1;
356 /* current media profile */
357 cur_profile = header[6] << 8 | header[7];
358 info(udev, "current profile 0x%02x\n", cur_profile);
359 if (cur_profile == 0) {
360 info(udev, "no current profile, assuming no media\n");
366 switch (cur_profile) {
382 cd_media_dvd_rom = 1;
388 cd_media_dvd_ram = 1;
395 cd_media_dvd_plus_r = 1;
398 cd_media_dvd_plus_rw = 1;
401 cd_media_dvd_plus_rw_dl = 1;
404 cd_media_dvd_plus_r_dl = 1;
420 cd_media_hddvd_r = 1;
423 cd_media_hddvd_rw = 1;
431 static int cd_media_info(struct udev *udev, int fd)
434 unsigned char header[32];
435 static const char *media_status[] = {
443 scsi_cmd_set(udev, &sc, 0, 0x51);
444 scsi_cmd_set(udev, &sc, 8, sizeof(header));
445 scsi_cmd_set(udev, &sc, 9, 0);
446 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
448 info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
452 info(udev, "disk type %02x\n", header[8]);
454 /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
455 if (!cd_media_cd_rom && (header[2] & 3) < 4)
456 cd_media_state = media_status[header[2] & 3];
458 if ((header[2] & 3) != 2)
459 cd_media_session_next = header[10] << 8 | header[5];
460 cd_media_session_count = header[9] << 8 | header[4];
461 cd_media_track_count = header[11] << 8 | header[6];
466 static int cd_media_toc(struct udev *udev, int fd)
469 unsigned char header[12];
470 unsigned char toc[2048];
475 scsi_cmd_set(udev, &sc, 0, 0x43);
476 scsi_cmd_set(udev, &sc, 6, 1);
477 scsi_cmd_set(udev, &sc, 8, sizeof(header));
478 scsi_cmd_set(udev, &sc, 9, 0);
479 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
481 info_scsi_cmd_err(udev, "READ TOC", err);
485 len = (header[0] << 8 | header[1]) + 2;
486 info(udev, "READ TOC: len: %d\n", len);
487 if (len > sizeof(toc))
492 /* empty media has no tracks */
496 scsi_cmd_set(udev, &sc, 0, 0x43);
497 scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
498 scsi_cmd_set(udev, &sc, 7, len >> 8);
499 scsi_cmd_set(udev, &sc, 8, len);
500 scsi_cmd_set(udev, &sc, 9, 0);
501 err = scsi_cmd_run(udev, &sc, fd, toc, len);
503 info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
507 for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
509 unsigned int is_data_track;
511 is_data_track = (p[1] & 0x04) != 0;
513 block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
514 info(udev, "track=%u info=0x%x(%s) start_block=%u\n",
515 p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
518 cd_media_track_count_data++;
520 cd_media_track_count_audio++;
523 scsi_cmd_set(udev, &sc, 0, 0x43);
524 scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
525 scsi_cmd_set(udev, &sc, 8, 12);
526 scsi_cmd_set(udev, &sc, 9, 0);
527 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
529 info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
532 len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
533 info(udev, "last track %u starts at block %u\n", header[4+2], len);
534 cd_media_session_last_offset = (unsigned long long int)len * 2048;
538 int main(int argc, char *argv[])
541 static const struct option options[] = {
542 { "export", no_argument, NULL, 'x' },
543 { "debug", no_argument, NULL, 'd' },
544 { "help", no_argument, NULL, 'h' },
547 const char *node = NULL;
557 udev_log_init("cdrom_id");
558 udev_set_log_fn(udev, log_fn);
563 option = getopt_long(argc, argv, "dxh", options, NULL);
570 if (udev_get_log_priority(udev) < LOG_INFO)
571 udev_set_log_priority(udev, LOG_INFO);
577 printf("Usage: cdrom_id [options] <device>\n"
578 " --export export key/value pairs\n"
579 " --debug debug to stderr\n"
580 " --help print this help text\n\n");
590 err(udev, "no device\n");
591 fprintf(stderr, "no device\n");
596 srand((unsigned int)getpid());
597 for (cnt = 20; cnt > 0; cnt--) {
598 struct timespec duration;
600 fd = open(node, O_RDONLY|O_NONBLOCK|(is_mounted(node) ? 0 : O_EXCL));
601 if (fd >= 0 || errno != EBUSY)
604 duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
605 nanosleep(&duration, NULL);
608 info(udev, "unable to open '%s'\n", node);
609 fprintf(stderr, "unable to open '%s'\n", node);
613 info(udev, "probing: '%s'\n", node);
615 /* same data as original cdrom_id */
616 if (cd_capability_compat(udev, fd) < 0) {
621 /* check for media - don't bail if there's no media as we still need to
622 * to read profiles */
623 cd_media_compat(udev, fd);
625 /* check if drive talks MMC */
626 if (cd_inquiry(udev, fd) < 0)
629 /* read drive and possibly current profile */
630 if (cd_profiles(udev, fd) < 0)
633 /* get session/track info */
634 if (cd_media_toc(udev, fd) < 0)
637 /* get writable media state */
638 if (cd_media_info(udev, fd) < 0)
642 printf("ID_CDROM=1\n");
644 printf("ID_CDROM_CD=1\n");
646 printf("ID_CDROM_CD_R=1\n");
648 printf("ID_CDROM_CD_RW=1\n");
650 printf("ID_CDROM_DVD=1\n");
652 printf("ID_CDROM_DVD_R=1\n");
654 printf("ID_CDROM_DVD_RW=1\n");
656 printf("ID_CDROM_DVD_RAM=1\n");
658 printf("ID_CDROM_DVD_PLUS_R=1\n");
660 printf("ID_CDROM_DVD_PLUS_RW=1\n");
661 if (cd_dvd_plus_r_dl)
662 printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
663 if (cd_dvd_plus_rw_dl)
664 printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
666 printf("ID_CDROM_BD=1\n");
668 printf("ID_CDROM_BD_R=1\n");
670 printf("ID_CDROM_BD_RE=1\n");
672 printf("ID_CDROM_HDDVD=1\n");
674 printf("ID_CDROM_HDDVD_R=1\n");
676 printf("ID_CDROM_HDDVD_RW=1\n");
678 printf("ID_CDROM_MO=1\n");
680 printf("ID_CDROM_MRW=1\n");
682 printf("ID_CDROM_MRW_W=1\n");
685 printf("ID_CDROM_MEDIA=1\n");
687 printf("ID_CDROM_MEDIA_MO=1\n");
689 printf("ID_CDROM_MEDIA_MRW=1\n");
691 printf("ID_CDROM_MEDIA_MRW_W=1\n");
693 printf("ID_CDROM_MEDIA_CD=1\n");
695 printf("ID_CDROM_MEDIA_CD_R=1\n");
697 printf("ID_CDROM_MEDIA_CD_RW=1\n");
698 if (cd_media_dvd_rom)
699 printf("ID_CDROM_MEDIA_DVD=1\n");
701 printf("ID_CDROM_MEDIA_DVD_R=1\n");
702 if (cd_media_dvd_ram)
703 printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
705 printf("ID_CDROM_MEDIA_DVD_RW=1\n");
706 if (cd_media_dvd_plus_r)
707 printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
708 if (cd_media_dvd_plus_rw)
709 printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
710 if (cd_media_dvd_plus_rw_dl)
711 printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
712 if (cd_media_dvd_plus_r_dl)
713 printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
715 printf("ID_CDROM_MEDIA_BD=1\n");
717 printf("ID_CDROM_MEDIA_BD_R=1\n");
719 printf("ID_CDROM_MEDIA_BD_RE=1\n");
721 printf("ID_CDROM_MEDIA_HDDVD=1\n");
722 if (cd_media_hddvd_r)
723 printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
724 if (cd_media_hddvd_rw)
725 printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
727 if (cd_media_state != NULL)
728 printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
729 if (cd_media_session_next > 0)
730 printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
731 if (cd_media_session_count > 0)
732 printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
733 if (cd_media_track_count > 0)
734 printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
735 if (cd_media_track_count_audio > 0)
736 printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);
737 if (cd_media_track_count_data > 0)
738 printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);
739 if (cd_media_session_last_offset > 0)
740 printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);