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 it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
35 #include <sys/types.h>
38 #include <sys/ioctl.h>
39 #include <linux/cdrom.h>
40 #include "../../udev.h"
43 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
49 void log_message(int priority, const char *format, ...)
52 static int udev_log = -1;
57 value = getenv("UDEV_LOG");
59 udev_log = log_priority(value);
63 if (debug && udev_log < LOG_INFO)
67 if (priority > udev_log)
70 va_start(args, format);
72 fprintf(stderr, "[%d] ", (int) getpid());
73 vfprintf(stderr, format, args);
75 vsyslog(priority, format, args);
81 static unsigned int cd_cd_rom;
82 static unsigned int cd_cd_r;
83 static unsigned int cd_cd_rw;
84 static unsigned int cd_dvd_rom;
85 static unsigned int cd_dvd_r;
86 static unsigned int cd_dvd_rw;
87 static unsigned int cd_dvd_ram;
88 static unsigned int cd_dvd_plus_r;
89 static unsigned int cd_dvd_plus_rw;
90 static unsigned int cd_dvd_plus_r_dl;
91 static unsigned int cd_dvd_plus_rw_dl;
92 static unsigned int cd_bd;
93 static unsigned int cd_bd_r;
94 static unsigned int cd_bd_re;
95 static unsigned int cd_hddvd;
96 static unsigned int cd_hddvd_r;
97 static unsigned int cd_hddvd_rw;
98 static unsigned int cd_mo;
99 static unsigned int cd_mrw;
100 static unsigned int cd_mrw_w;
103 static unsigned int cd_media_cd_rom;
104 static unsigned int cd_media_cd_r;
105 static unsigned int cd_media_cd_rw;
106 static unsigned int cd_media_dvd_rom;
107 static unsigned int cd_media_dvd_r;
108 static unsigned int cd_media_dvd_rw;
109 static unsigned int cd_media_dvd_ram;
110 static unsigned int cd_media_dvd_plus_r;
111 static unsigned int cd_media_dvd_plus_rw;
112 static unsigned int cd_media_dvd_plus_r_dl;
113 static unsigned int cd_media_dvd_plus_rw_dl;
114 static unsigned int cd_media_bd;
115 static unsigned int cd_media_bd_r;
116 static unsigned int cd_media_bd_re;
117 static unsigned int cd_media_hddvd;
118 static unsigned int cd_media_hddvd_r;
119 static unsigned int cd_media_hddvd_rw;
120 static unsigned int cd_media_mo;
121 static unsigned int cd_media_mrw;
122 static unsigned int cd_media_mrw_w;
124 static const char *cd_media_state;
125 static unsigned int cd_media_has_audio;
126 static unsigned int cd_media_session_next;
127 static unsigned int cd_media_session_count;
128 static unsigned int cd_media_track_count;
129 static unsigned long long int cd_media_session_last_offset;
131 #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13]))
132 #define SK(errcode) (((errcode) >> 16) & 0xF)
133 #define ASC(errcode) (((errcode) >> 8) & 0xFF)
134 #define ASCQ(errcode) ((errcode) & 0xFF)
136 static void info_scsi_cmd_err(const char *cmd, int err)
139 info("%s failed\n", cmd);
142 info("%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh\n", cmd, SK(err), ASC(err), ASCQ(err));
146 struct cdrom_generic_command cgc;
148 struct request_sense s;
151 struct sg_io_hdr sg_io;
154 static void scsi_cmd_set(struct scsi_cmd *cmd, size_t i, int arg)
157 memset(cmd, 0x00, sizeof(struct scsi_cmd));
159 cmd->cgc.sense = &cmd->_sense.s;
160 memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));
161 cmd->sg_io.interface_id = 'S';
162 cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
163 cmd->sg_io.cmdp = cmd->cgc.cmd;
164 cmd->sg_io.sbp = cmd->_sense.u;
165 cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
167 cmd->sg_io.cmd_len = i + 1;
168 cmd->cgc.cmd[i] = arg;
171 #define CHECK_CONDITION 0x01
173 static int scsi_cmd_run(struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize)
177 cmd->sg_io.dxferp = buf;
178 cmd->sg_io.dxfer_len = bufsize;
179 cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
180 if (ioctl(fd, SG_IO, &cmd->sg_io))
183 if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) {
186 if (cmd->sg_io.masked_status & CHECK_CONDITION) {
187 ret = ERRCODE(cmd->_sense.u);
195 static int cd_capability_compat(int fd)
199 capabilty = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
201 info("CDROM_GET_CAPABILITY failed\n");
205 if (capabilty & CDC_CD_R)
207 if (capabilty & CDC_CD_RW)
209 if (capabilty & CDC_DVD)
211 if (capabilty & CDC_DVD_R)
213 if (capabilty & CDC_DVD_RAM)
215 if (capabilty & CDC_MRW)
217 if (capabilty & CDC_MRW_W)
222 static int cd_inquiry(int fd) {
224 unsigned char inq[128];
227 scsi_cmd_set(&sc, 0, 0x12);
228 scsi_cmd_set(&sc, 4, 36);
229 scsi_cmd_set(&sc, 5, 0);
230 err = scsi_cmd_run(&sc, fd, inq, 36);
232 info_scsi_cmd_err("INQUIRY", err);
236 if ((inq[0] & 0x1F) != 5) {
237 info("not an MMC unit\n");
241 info("INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);
245 static int cd_profiles(int fd)
248 unsigned char header[8];
249 unsigned char profiles[512];
250 unsigned int cur_profile;
255 scsi_cmd_set(&sc, 0, 0x46);
256 scsi_cmd_set(&sc, 1, 0);
257 scsi_cmd_set(&sc, 8, sizeof(header));
258 scsi_cmd_set(&sc, 9, 0);
259 err = scsi_cmd_run(&sc, fd, header, sizeof(header));
261 info_scsi_cmd_err("GET CONFIGURATION", err);
265 len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
266 info("GET CONFIGURATION: number of profiles %i\n", len);
267 if (len > sizeof(profiles)) {
268 info("invalid number of profiles\n");
272 scsi_cmd_set(&sc, 0, 0x46);
273 scsi_cmd_set(&sc, 1, 1);
274 scsi_cmd_set(&sc, 6, len >> 16);
275 scsi_cmd_set(&sc, 7, len >> 8);
276 scsi_cmd_set(&sc, 8, len);
277 scsi_cmd_set(&sc, 9, 0);
278 err = scsi_cmd_run(&sc, fd, profiles, len);
280 info_scsi_cmd_err("GET CONFIGURATION", err);
284 /* device profiles */
285 for (i = 12; i < profiles[11]; i += 4) {
286 unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
289 info("profile 0x%02x\n", profile);
314 cd_dvd_plus_rw_dl = 1;
317 cd_dvd_plus_r_dl = 1;
343 /* current media profile */
344 cur_profile = header[6] << 8 | header[7];
345 info("current profile 0x%02x\n", cur_profile);
346 if (cur_profile == 0) {
347 info("no current profile, assuming no media\n");
351 switch (cur_profile) {
367 cd_media_dvd_rom = 1;
373 cd_media_dvd_ram = 1;
380 cd_media_dvd_plus_r = 1;
383 cd_media_dvd_plus_rw = 1;
386 cd_media_dvd_plus_rw_dl = 1;
389 cd_media_dvd_plus_r_dl = 1;
405 cd_media_hddvd_r = 1;
408 cd_media_hddvd_rw = 1;
416 static int cd_media_info(int fd)
419 unsigned char header[32];
420 static const char *media_status[] = {
428 scsi_cmd_set(&sc, 0, 0x51);
429 scsi_cmd_set(&sc, 8, sizeof(header));
430 scsi_cmd_set(&sc, 9, 0);
431 err = scsi_cmd_run(&sc, fd, header, sizeof(header));
433 info_scsi_cmd_err("READ DISC INFORMATION", err);
437 info("disk type %02x\n", header[8]);
439 if ((header[2] & 3) < 4)
440 cd_media_state = media_status[header[2] & 3];
441 if ((header[2] & 3) != 2)
442 cd_media_session_next = header[10] << 8 | header[5];
443 cd_media_session_count = header[9] << 8 | header[4];
444 cd_media_track_count = header[11] << 8 | header[6];
449 static int cd_media_toc(int fd)
452 unsigned char header[12];
453 unsigned char toc[2048];
458 scsi_cmd_set(&sc, 0, 0x43);
459 scsi_cmd_set(&sc, 6, 1);
460 scsi_cmd_set(&sc, 8, sizeof(header));
461 scsi_cmd_set(&sc, 9, 0);
462 err = scsi_cmd_run(&sc, fd, header, sizeof(header));
464 info_scsi_cmd_err("READ TOC", err);
468 len = (header[0] << 8 | header[1]) + 2;
469 info("READ TOC: len: %d\n", len);
470 if (len > sizeof(toc))
473 /* check if we have a data track */
474 info("ctl %02x (0x04 is data/audio)\n", header[5]);
475 cd_media_has_audio = (header[5] & 0x04) == 0;
477 scsi_cmd_set(&sc, 0, 0x43);
478 scsi_cmd_set(&sc, 6, header[2]); /* First Track/Session Number */
479 scsi_cmd_set(&sc, 7, len >> 8);
480 scsi_cmd_set(&sc, 8, len);
481 scsi_cmd_set(&sc, 9, 0);
482 err = scsi_cmd_run(&sc, fd, toc, len);
484 info_scsi_cmd_err("READ TOC (tracks)", err);
488 for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
491 block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
492 info("track %u starts at block %u\n", p[2], block);
495 scsi_cmd_set(&sc, 0, 0x43);
496 scsi_cmd_set(&sc, 2, 1); /* Session Info */
497 scsi_cmd_set(&sc, 8, 12);
498 scsi_cmd_set(&sc, 9, 0);
499 err = scsi_cmd_run(&sc, fd, header, sizeof(header));
501 info_scsi_cmd_err("READ TOC (multi session)", err);
504 len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
505 info("last track %u starts at block %u\n", header[4+2], len);
506 cd_media_session_last_offset = (unsigned long long int)len * 2048;
510 int main(int argc, char *argv[])
512 static const struct option options[] = {
513 { "export", 0, NULL, 'x' },
514 { "debug", 0, NULL, 'd' },
515 { "help", 0, NULL, 'h' },
518 const char *node = NULL;
523 logging_init("cdrom_id");
528 option = getopt_long(argc, argv, "dxh", options, NULL);
540 printf("Usage: cdrom_id [options] <device>\n"
541 " --export export key/value pairs\n"
553 fprintf(stderr, "no device\n");
558 fd = open(node, O_RDONLY | O_NONBLOCK);
560 info("unable to open '%s'\n", node);
564 info("probing: '%s'\n", node);
566 /* same data as original cdrom_id */
567 if (cd_capability_compat(fd) < 0) {
573 if (cd_inquiry(fd) < 0) {
578 /* read drive and possibly current profile */
579 if (cd_profiles(fd) < 0)
582 /* get session/track info */
583 if (cd_media_toc(fd) < 0)
586 /* get writable media state */
587 if (cd_media_info(fd) < 0)
591 printf("ID_CDROM=1\n");
593 printf("ID_CDROM_CD=1\n");
595 printf("ID_CDROM_CD_R=1\n");
597 printf("ID_CDROM_CD_RW=1\n");
599 printf("ID_CDROM_DVD=1\n");
601 printf("ID_CDROM_DVD_R=1\n");
603 printf("ID_CDROM_DVD_RW=1\n");
605 printf("ID_CDROM_DVD_RAM=1\n");
607 printf("ID_CDROM_DVD_PLUS_R=1\n");
609 printf("ID_CDROM_DVD_PLUS_RW=1\n");
610 if (cd_dvd_plus_r_dl)
611 printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
612 if (cd_dvd_plus_rw_dl)
613 printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
615 printf("ID_CDROM_BD=1\n");
617 printf("ID_CDROM_BD_R=1\n");
619 printf("ID_CDROM_BD_RE=1\n");
621 printf("ID_CDROM_HDDVD=1\n");
623 printf("ID_CDROM_HDDVD_R=1\n");
625 printf("ID_CDROM_HDDVD_RW=1\n");
627 printf("ID_CDROM_MO=1\n");
629 printf("ID_CDROM_MRW=1\n");
631 printf("ID_CDROM_MRW_W=1\n");
634 printf("ID_CDROM_MEDIA_MO=1\n");
636 printf("ID_CDROM_MEDIA_MRW=1\n");
638 printf("ID_CDROM_MEDIA_MRW_W=1\n");
640 printf("ID_CDROM_MEDIA_CD=1\n");
642 printf("ID_CDROM_MEDIA_CD_R=1\n");
644 printf("ID_CDROM_MEDIA_CD_RW=1\n");
645 if (cd_media_dvd_rom)
646 printf("ID_CDROM_MEDIA_DVD=1\n");
648 printf("ID_CDROM_MEDIA_DVD_R=1\n");
649 if (cd_media_dvd_ram)
650 printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
652 printf("ID_CDROM_MEDIA_DVD_RW=1\n");
653 if (cd_media_dvd_plus_r)
654 printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
655 if (cd_media_dvd_plus_rw)
656 printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
657 if (cd_media_dvd_plus_rw_dl)
658 printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
659 if (cd_media_dvd_plus_r_dl)
660 printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
662 printf("ID_CDROM_MEDIA_BD=1\n");
664 printf("ID_CDROM_MEDIA_BD_R=1\n");
666 printf("ID_CDROM_MEDIA_BD_RE=1\n");
668 printf("ID_CDROM_MEDIA_HDDVD=1\n");
669 if (cd_media_hddvd_r)
670 printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
671 if (cd_media_hddvd_rw)
672 printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
674 if (cd_media_state != NULL)
675 printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
676 if (cd_media_has_audio)
677 printf("ID_CDROM_MEDIA_HAS_AUDIO=1\n");
678 if (cd_media_session_next > 0)
679 printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
680 if (cd_media_session_count > 0)
681 printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
682 if (cd_media_track_count > 0)
683 printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
684 if (cd_media_session_last_offset)
685 printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);