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/>.
34 #include <sys/types.h>
37 #include <sys/ioctl.h>
38 #include <linux/cdrom.h>
41 #include "libudev-private.h"
45 static void log_fn(struct udev *udev, int priority,
46 const char *file, int line, const char *fn,
47 const char *format, va_list args)
50 fprintf(stderr, "%s: ", fn);
51 vfprintf(stderr, format, args);
53 vsyslog(priority, format, args);
58 static unsigned int cd_cd_rom;
59 static unsigned int cd_cd_r;
60 static unsigned int cd_cd_rw;
61 static unsigned int cd_dvd_rom;
62 static unsigned int cd_dvd_r;
63 static unsigned int cd_dvd_rw;
64 static unsigned int cd_dvd_ram;
65 static unsigned int cd_dvd_plus_r;
66 static unsigned int cd_dvd_plus_rw;
67 static unsigned int cd_dvd_plus_r_dl;
68 static unsigned int cd_dvd_plus_rw_dl;
69 static unsigned int cd_bd;
70 static unsigned int cd_bd_r;
71 static unsigned int cd_bd_re;
72 static unsigned int cd_hddvd;
73 static unsigned int cd_hddvd_r;
74 static unsigned int cd_hddvd_rw;
75 static unsigned int cd_mo;
76 static unsigned int cd_mrw;
77 static unsigned int cd_mrw_w;
80 static unsigned int cd_media;
81 static unsigned int cd_media_cd_rom;
82 static unsigned int cd_media_cd_r;
83 static unsigned int cd_media_cd_rw;
84 static unsigned int cd_media_dvd_rom;
85 static unsigned int cd_media_dvd_r;
86 static unsigned int cd_media_dvd_rw;
87 static unsigned int cd_media_dvd_ram;
88 static unsigned int cd_media_dvd_plus_r;
89 static unsigned int cd_media_dvd_plus_rw;
90 static unsigned int cd_media_dvd_plus_r_dl;
91 static unsigned int cd_media_dvd_plus_rw_dl;
92 static unsigned int cd_media_bd;
93 static unsigned int cd_media_bd_r;
94 static unsigned int cd_media_bd_re;
95 static unsigned int cd_media_hddvd;
96 static unsigned int cd_media_hddvd_r;
97 static unsigned int cd_media_hddvd_rw;
98 static unsigned int cd_media_mo;
99 static unsigned int cd_media_mrw;
100 static unsigned int cd_media_mrw_w;
102 static const char *cd_media_state;
103 static unsigned int cd_media_session_next;
104 static unsigned int cd_media_session_count;
105 static unsigned int cd_media_track_count;
106 static unsigned int cd_media_track_count_data;
107 static unsigned int cd_media_track_count_audio;
108 static unsigned long long int cd_media_session_last_offset;
110 #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13]))
111 #define SK(errcode) (((errcode) >> 16) & 0xF)
112 #define ASC(errcode) (((errcode) >> 8) & 0xFF)
113 #define ASCQ(errcode) ((errcode) & 0xFF)
115 static void info_scsi_cmd_err(struct udev *udev, char *cmd, int err)
118 info(udev, "%s failed\n", cmd);
121 info(udev, "%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh\n", cmd, SK(err), ASC(err), ASCQ(err));
125 struct cdrom_generic_command cgc;
127 struct request_sense s;
130 struct sg_io_hdr sg_io;
133 static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg)
136 memset(cmd, 0x00, sizeof(struct scsi_cmd));
138 cmd->cgc.sense = &cmd->_sense.s;
139 memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));
140 cmd->sg_io.interface_id = 'S';
141 cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
142 cmd->sg_io.cmdp = cmd->cgc.cmd;
143 cmd->sg_io.sbp = cmd->_sense.u;
144 cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
146 cmd->sg_io.cmd_len = i + 1;
147 cmd->cgc.cmd[i] = arg;
150 #define CHECK_CONDITION 0x01
152 static int scsi_cmd_run(struct udev *udev, struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize)
156 cmd->sg_io.dxferp = buf;
157 cmd->sg_io.dxfer_len = bufsize;
158 cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
159 if (ioctl(fd, SG_IO, &cmd->sg_io))
162 if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) {
165 if (cmd->sg_io.masked_status & CHECK_CONDITION) {
166 ret = ERRCODE(cmd->_sense.u);
174 static int cd_capability_compat(struct udev *udev, int fd)
178 capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
179 if (capability < 0) {
180 info(udev, "CDROM_GET_CAPABILITY failed\n");
184 if (capability & CDC_CD_R)
186 if (capability & CDC_CD_RW)
188 if (capability & CDC_DVD)
190 if (capability & CDC_DVD_R)
192 if (capability & CDC_DVD_RAM)
194 if (capability & CDC_MRW)
196 if (capability & CDC_MRW_W)
201 static int cd_media_compat(struct udev *udev, int fd)
203 if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) != CDS_DISC_OK) {
204 info(udev, "CDROM_DRIVE_STATUS != CDS_DISC_OK\n");
211 static int cd_inquiry(struct udev *udev, int fd) {
213 unsigned char inq[128];
216 scsi_cmd_set(udev, &sc, 0, 0x12);
217 scsi_cmd_set(udev, &sc, 4, 36);
218 scsi_cmd_set(udev, &sc, 5, 0);
219 err = scsi_cmd_run(udev, &sc, fd, inq, 36);
221 info_scsi_cmd_err(udev, "INQUIRY", err);
225 if ((inq[0] & 0x1F) != 5) {
226 info(udev, "not an MMC unit\n");
230 info(udev, "INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);
234 static int cd_profiles(struct udev *udev, int fd)
237 unsigned char header[8];
238 unsigned char profiles[512];
239 unsigned int cur_profile;
244 scsi_cmd_set(udev, &sc, 0, 0x46);
245 scsi_cmd_set(udev, &sc, 1, 0);
246 scsi_cmd_set(udev, &sc, 8, sizeof(header));
247 scsi_cmd_set(udev, &sc, 9, 0);
248 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
250 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
254 len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
255 info(udev, "GET CONFIGURATION: number of profiles %i\n", len);
256 if (len > sizeof(profiles)) {
257 info(udev, "invalid number of profiles\n");
261 scsi_cmd_set(udev, &sc, 0, 0x46);
262 scsi_cmd_set(udev, &sc, 1, 1);
263 scsi_cmd_set(udev, &sc, 6, len >> 16);
264 scsi_cmd_set(udev, &sc, 7, len >> 8);
265 scsi_cmd_set(udev, &sc, 8, len);
266 scsi_cmd_set(udev, &sc, 9, 0);
267 err = scsi_cmd_run(udev, &sc, fd, profiles, len);
269 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
273 /* device profiles */
274 for (i = 12; i < profiles[11]; i += 4) {
275 unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
278 info(udev, "profile 0x%02x\n", profile);
303 cd_dvd_plus_rw_dl = 1;
306 cd_dvd_plus_r_dl = 1;
332 /* current media profile */
333 cur_profile = header[6] << 8 | header[7];
334 info(udev, "current profile 0x%02x\n", cur_profile);
335 if (cur_profile == 0) {
336 info(udev, "no current profile, assuming no media\n");
342 switch (cur_profile) {
358 cd_media_dvd_rom = 1;
364 cd_media_dvd_ram = 1;
371 cd_media_dvd_plus_r = 1;
374 cd_media_dvd_plus_rw = 1;
377 cd_media_dvd_plus_rw_dl = 1;
380 cd_media_dvd_plus_r_dl = 1;
396 cd_media_hddvd_r = 1;
399 cd_media_hddvd_rw = 1;
407 static int cd_media_info(struct udev *udev, int fd)
410 unsigned char header[32];
411 static const char *media_status[] = {
419 scsi_cmd_set(udev, &sc, 0, 0x51);
420 scsi_cmd_set(udev, &sc, 8, sizeof(header));
421 scsi_cmd_set(udev, &sc, 9, 0);
422 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
424 info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
428 info(udev, "disk type %02x\n", header[8]);
430 /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
431 if (!cd_media_cd_rom && (header[2] & 3) < 4)
432 cd_media_state = media_status[header[2] & 3];
434 if ((header[2] & 3) != 2)
435 cd_media_session_next = header[10] << 8 | header[5];
436 cd_media_session_count = header[9] << 8 | header[4];
437 cd_media_track_count = header[11] << 8 | header[6];
442 static int cd_media_toc(struct udev *udev, int fd)
445 unsigned char header[12];
446 unsigned char toc[2048];
451 scsi_cmd_set(udev, &sc, 0, 0x43);
452 scsi_cmd_set(udev, &sc, 6, 1);
453 scsi_cmd_set(udev, &sc, 8, sizeof(header));
454 scsi_cmd_set(udev, &sc, 9, 0);
455 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
457 info_scsi_cmd_err(udev, "READ TOC", err);
461 len = (header[0] << 8 | header[1]) + 2;
462 info(udev, "READ TOC: len: %d\n", len);
463 if (len > sizeof(toc))
468 /* empty media has no tracks */
472 scsi_cmd_set(udev, &sc, 0, 0x43);
473 scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
474 scsi_cmd_set(udev, &sc, 7, len >> 8);
475 scsi_cmd_set(udev, &sc, 8, len);
476 scsi_cmd_set(udev, &sc, 9, 0);
477 err = scsi_cmd_run(udev, &sc, fd, toc, len);
479 info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
483 for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
485 unsigned int is_data_track;
487 is_data_track = (p[1] & 0x04) != 0;
489 block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
490 info(udev, "track=%u info=0x%x(%s) start_block=%u\n",
491 p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
494 cd_media_track_count_data++;
496 cd_media_track_count_audio++;
499 scsi_cmd_set(udev, &sc, 0, 0x43);
500 scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
501 scsi_cmd_set(udev, &sc, 8, 12);
502 scsi_cmd_set(udev, &sc, 9, 0);
503 err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
505 info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
508 len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
509 info(udev, "last track %u starts at block %u\n", header[4+2], len);
510 cd_media_session_last_offset = (unsigned long long int)len * 2048;
514 int main(int argc, char *argv[])
517 static const struct option options[] = {
518 { "export", no_argument, NULL, 'x' },
519 { "debug", no_argument, NULL, 'd' },
520 { "help", no_argument, NULL, 'h' },
523 const char *node = NULL;
532 udev_log_init("cdrom_id");
533 udev_set_log_fn(udev, log_fn);
538 option = getopt_long(argc, argv, "dxh", options, NULL);
545 if (udev_get_log_priority(udev) < LOG_INFO)
546 udev_set_log_priority(udev, LOG_INFO);
552 printf("Usage: cdrom_id [options] <device>\n"
553 " --export export key/value pairs\n"
554 " --debug debug to stderr\n"
555 " --help print this help text\n\n");
565 err(udev, "no device\n");
566 fprintf(stderr, "no device\n");
571 fd = open(node, O_RDONLY | O_NONBLOCK);
573 info(udev, "unable to open '%s'\n", node);
574 fprintf(stderr, "unable to open '%s'\n", node);
578 info(udev, "probing: '%s'\n", node);
580 /* same data as original cdrom_id */
581 if (cd_capability_compat(udev, fd) < 0) {
586 /* check for media */
587 if (cd_media_compat(udev, fd) < 0)
590 /* check if drive talks MMC */
591 if (cd_inquiry(udev, fd) < 0)
594 /* read drive and possibly current profile */
595 if (cd_profiles(udev, fd) < 0)
598 /* get session/track info */
599 if (cd_media_toc(udev, fd) < 0)
602 /* get writable media state */
603 if (cd_media_info(udev, fd) < 0)
607 printf("ID_CDROM=1\n");
609 printf("ID_CDROM_CD=1\n");
611 printf("ID_CDROM_CD_R=1\n");
613 printf("ID_CDROM_CD_RW=1\n");
615 printf("ID_CDROM_DVD=1\n");
617 printf("ID_CDROM_DVD_R=1\n");
619 printf("ID_CDROM_DVD_RW=1\n");
621 printf("ID_CDROM_DVD_RAM=1\n");
623 printf("ID_CDROM_DVD_PLUS_R=1\n");
625 printf("ID_CDROM_DVD_PLUS_RW=1\n");
626 if (cd_dvd_plus_r_dl)
627 printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
628 if (cd_dvd_plus_rw_dl)
629 printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
631 printf("ID_CDROM_BD=1\n");
633 printf("ID_CDROM_BD_R=1\n");
635 printf("ID_CDROM_BD_RE=1\n");
637 printf("ID_CDROM_HDDVD=1\n");
639 printf("ID_CDROM_HDDVD_R=1\n");
641 printf("ID_CDROM_HDDVD_RW=1\n");
643 printf("ID_CDROM_MO=1\n");
645 printf("ID_CDROM_MRW=1\n");
647 printf("ID_CDROM_MRW_W=1\n");
650 printf("ID_CDROM_MEDIA=1\n");
652 printf("ID_CDROM_MEDIA_MO=1\n");
654 printf("ID_CDROM_MEDIA_MRW=1\n");
656 printf("ID_CDROM_MEDIA_MRW_W=1\n");
658 printf("ID_CDROM_MEDIA_CD=1\n");
660 printf("ID_CDROM_MEDIA_CD_R=1\n");
662 printf("ID_CDROM_MEDIA_CD_RW=1\n");
663 if (cd_media_dvd_rom)
664 printf("ID_CDROM_MEDIA_DVD=1\n");
666 printf("ID_CDROM_MEDIA_DVD_R=1\n");
667 if (cd_media_dvd_ram)
668 printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
670 printf("ID_CDROM_MEDIA_DVD_RW=1\n");
671 if (cd_media_dvd_plus_r)
672 printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
673 if (cd_media_dvd_plus_rw)
674 printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
675 if (cd_media_dvd_plus_rw_dl)
676 printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
677 if (cd_media_dvd_plus_r_dl)
678 printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
680 printf("ID_CDROM_MEDIA_BD=1\n");
682 printf("ID_CDROM_MEDIA_BD_R=1\n");
684 printf("ID_CDROM_MEDIA_BD_RE=1\n");
686 printf("ID_CDROM_MEDIA_HDDVD=1\n");
687 if (cd_media_hddvd_r)
688 printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
689 if (cd_media_hddvd_rw)
690 printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
692 if (cd_media_state != NULL)
693 printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
694 if (cd_media_session_next > 0)
695 printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
696 if (cd_media_session_count > 0)
697 printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
698 if (cd_media_track_count > 0)
699 printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
700 if (cd_media_track_count_audio > 0)
701 printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);
702 if (cd_media_track_count_data > 0)
703 printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);
704 if (cd_media_session_last_offset > 0)
705 printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);