extras/cdrom_id/cdrom_id.c

   1 /*
   2  * cdrom_id - optical drive and media information prober
   3  *
   4  * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 #ifndef _GNU_SOURCE
  21 #define _GNU_SOURCE 1
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stddef.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <limits.h>
  30 #include <fcntl.h>
  31 #include <errno.h>
  32 #include <getopt.h>
  33 #include <time.h>
  34 #include <scsi/sg.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <sys/time.h>
  38 #include <sys/ioctl.h>
  39 #include <linux/cdrom.h>
  40
  41 #include "libudev.h"
  42 #include "libudev-private.h"
  43
  44 static int debug;
  45
  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)
  49 {
  50         if (debug) {
  51                 fprintf(stderr, "%s: ", fn);
  52                 vfprintf(stderr, format, args);
  53         } else {
  54                 vsyslog(priority, format, args);
  55         }
  56 }
  57
  58 /* device info */
  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;
  79
  80 /* media info */
  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;
 102
 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;
 110
 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)
 115
 116 static int is_mounted(const char *device)
 117 {
 118         struct stat statbuf;
 119         FILE *fp;
 120         int maj, min;
 121         int mounted = 0;
 122
 123         if (stat(device, &statbuf) < 0)
 124                 return -ENODEV;
 125
 126         fp = fopen("/proc/self/mountinfo", "r");
 127         if (fp == NULL)
 128                 return -ENOSYS;
 129         while (fscanf(fp, "%*s %*s %i:%i %*[^\n]", &maj, &min) == 2) {
 130                 if (makedev(maj, min) == statbuf.st_rdev) {
 131                         mounted = 1;
 132                         break;
 133                 }
 134         }
 135         fclose(fp);
 136         return mounted;
 137 }
 138
 139 static void info_scsi_cmd_err(struct udev *udev, char *cmd, int err)
 140 {
 141         if (err == -1) {
 142                 info(udev, "%s failed\n", cmd);
 143                 return;
 144         }
 145         info(udev, "%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh\n", cmd, SK(err), ASC(err), ASCQ(err));
 146 }
 147
 148 struct scsi_cmd {
 149         struct cdrom_generic_command cgc;
 150         union {
 151                 struct request_sense s;
 152                 unsigned char u[18];
 153         } _sense;
 154         struct sg_io_hdr sg_io;
 155 };
 156
 157 static void scsi_cmd_init(struct udev *udev, struct scsi_cmd *cmd, unsigned char *buf, size_t bufsize)
 158 {
 159         memset(cmd, 0x00, sizeof(struct scsi_cmd));
 160         memset(buf, 0x00, bufsize);
 161         cmd->cgc.quiet = 1;
 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;
 169 }
 170
 171 static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, unsigned char arg)
 172 {
 173         cmd->sg_io.cmd_len = i + 1;
 174         cmd->cgc.cmd[i] = arg;
 175 }
 176
 177 #define CHECK_CONDITION 0x01
 178
 179 static int scsi_cmd_run(struct udev *udev, struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize)
 180 {
 181         int ret = 0;
 182
 183         cmd->sg_io.dxferp = buf;
 184         cmd->sg_io.dxfer_len = bufsize;
 185         cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
 186         if (ioctl(fd, SG_IO, &cmd->sg_io))
 187                 return -1;
 188
 189         if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) {
 190                 errno = EIO;
 191                 ret = -1;
 192                 if (cmd->sg_io.masked_status & CHECK_CONDITION) {
 193                         ret = ERRCODE(cmd->_sense.u);
 194                         if (ret == 0)
 195                                 ret = -1;
 196                 }
 197         }
 198         return ret;
 199 }
 200
 201 static int cd_capability_compat(struct udev *udev, int fd)
 202 {
 203         int capability;
 204
 205         capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL);
 206         if (capability < 0) {
 207                 info(udev, "CDROM_GET_CAPABILITY failed\n");
 208                 return -1;
 209         }
 210
 211         if (capability & CDC_CD_R)
 212                 cd_cd_r = 1;
 213         if (capability & CDC_CD_RW)
 214                 cd_cd_rw = 1;
 215         if (capability & CDC_DVD)
 216                 cd_dvd_rom = 1;
 217         if (capability & CDC_DVD_R)
 218                 cd_dvd_r = 1;
 219         if (capability & CDC_DVD_RAM)
 220                 cd_dvd_ram = 1;
 221         if (capability & CDC_MRW)
 222                 cd_mrw = 1;
 223         if (capability & CDC_MRW_W)
 224                 cd_mrw_w = 1;
 225         return 0;
 226 }
 227
 228 static int cd_media_compat(struct udev *udev, int fd)
 229 {
 230         if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) != CDS_DISC_OK) {
 231                 info(udev, "CDROM_DRIVE_STATUS != CDS_DISC_OK\n");
 232                 return -1;
 233         }
 234         cd_media = 1;
 235         return 0;
 236 }
 237
 238 static int cd_inquiry(struct udev *udev, int fd) {
 239         struct scsi_cmd sc;
 240         unsigned char inq[128];
 241         int err;
 242
 243         scsi_cmd_init(udev, &sc, inq, sizeof(inq));
 244         scsi_cmd_set(udev, &sc, 0, 0x12);
 245         scsi_cmd_set(udev, &sc, 4, 36);
 246         scsi_cmd_set(udev, &sc, 5, 0);
 247         err = scsi_cmd_run(udev, &sc, fd, inq, 36);
 248         if ((err != 0)) {
 249                 info_scsi_cmd_err(udev, "INQUIRY", err);
 250                 return -1;
 251         }
 252
 253         if ((inq[0] & 0x1F) != 5) {
 254                 info(udev, "not an MMC unit\n");
 255                 return -1;
 256         }
 257
 258         info(udev, "INQUIRY: [%.8s][%.16s][%.4s]\n", inq + 8, inq + 16, inq + 32);
 259         return 0;
 260 }
 261
 262 static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size)
 263 {
 264         unsigned int i;
 265
 266         for (i = 0; i+4 <= size; i += 4) {
 267                 int profile;
 268
 269                 profile = profiles[i] << 8 | profiles[i+1];
 270                 switch (profile) {
 271                 case 0x03:
 272                 case 0x04:
 273                 case 0x05:
 274                         info(udev, "profile 0x%02x mo\n", profile);
 275                         cd_mo = 1;
 276                         break;
 277                 case 0x08:
 278                         info(udev, "profile 0x%02x cd_rom\n", profile);
 279                         cd_cd_rom = 1;
 280                         break;
 281                 case 0x09:
 282                         info(udev, "profile 0x%02x cd_r\n", profile);
 283                         cd_cd_r = 1;
 284                         break;
 285                 case 0x0A:
 286                         info(udev, "profile 0x%02x cd_rw\n", profile);
 287                         cd_cd_rw = 1;
 288                         break;
 289                 case 0x10:
 290                         info(udev, "profile 0x%02x dvd_rom\n", profile);
 291                         cd_dvd_rom = 1;
 292                         break;
 293                 case 0x12:
 294                         info(udev, "profile 0x%02x dvd_ram\n", profile);
 295                         cd_dvd_ram = 1;
 296                         break;
 297                 case 0x13:
 298                 case 0x14:
 299                         info(udev, "profile 0x%02x dvd_rw\n", profile);
 300                         cd_dvd_rw = 1;
 301                         break;
 302                 case 0x1B:
 303                         info(udev, "profile 0x%02x dvd_plus_r\n", profile);
 304                         cd_dvd_plus_r = 1;
 305                         break;
 306                 case 0x1A:
 307                         info(udev, "profile 0x%02x dvd_plus_rw\n", profile);
 308                         cd_dvd_plus_rw = 1;
 309                         break;
 310                 case 0x2A:
 311                         info(udev, "profile 0x%02x dvd_plus_rw_dl\n", profile);
 312                         cd_dvd_plus_rw_dl = 1;
 313                         break;
 314                 case 0x2B:
 315                         info(udev, "profile 0x%02x dvd_plus_r_dl\n", profile);
 316                         cd_dvd_plus_r_dl = 1;
 317                         break;
 318                 case 0x40:
 319                         cd_bd = 1;
 320                         info(udev, "profile 0x%02x bd\n", profile);
 321                         break;
 322                 case 0x41:
 323                 case 0x42:
 324                         cd_bd_r = 1;
 325                         info(udev, "profile 0x%02x bd_r\n", profile);
 326                         break;
 327                 case 0x43:
 328                         cd_bd_re = 1;
 329                         info(udev, "profile 0x%02x bd_re\n", profile);
 330                         break;
 331                 case 0x50:
 332                         cd_hddvd = 1;
 333                         info(udev, "profile 0x%02x hddvd\n", profile);
 334                         break;
 335                 case 0x51:
 336                         cd_hddvd_r = 1;
 337                         info(udev, "profile 0x%02x hddvd_r\n", profile);
 338                         break;
 339                 case 0x52:
 340                         cd_hddvd_rw = 1;
 341                         info(udev, "profile 0x%02x hddvd_rw\n", profile);
 342                         break;
 343                 default:
 344                         info(udev, "profile 0x%02x <ignored>\n", profile);
 345                         break;
 346                 }
 347         }
 348         return 0;
 349 }
 350
 351 static int cd_profiles(struct udev *udev, int fd)
 352 {
 353         struct scsi_cmd sc;
 354         unsigned char features[65530];
 355         unsigned int cur_profile = 0;
 356         unsigned int len;
 357         unsigned int i;
 358         int err;
 359
 360         scsi_cmd_init(udev, &sc, features, sizeof(features));
 361         scsi_cmd_set(udev, &sc, 0, 0x46);
 362         scsi_cmd_set(udev, &sc, 7, (sizeof(features) >> 8) & 0xff);
 363         scsi_cmd_set(udev, &sc, 8, sizeof(features) & 0xff);
 364         scsi_cmd_set(udev, &sc, 9, 0);
 365         err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features));
 366         if ((err != 0)) {
 367                 info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
 368                 return -1;
 369         }
 370
 371         len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
 372         info(udev, "GET CONFIGURATION: size of features buffer 0x%04x\n", len);
 373
 374         if (len > sizeof(features)) {
 375                 info(udev, "can not get features in a single query, truncating\n");
 376                 len = sizeof(features);
 377         }
 378
 379         /* device features */
 380         for (i = 8; i+4 < len; i += (4 + features[i+3])) {
 381                 unsigned int feature;
 382
 383                 feature = features[i] << 8 | features[i+1];
 384
 385                 switch (feature) {
 386                 case 0x00:
 387                         info(udev, "GET CONFIGURATION: feature 'profiles', with %i entries\n", features[i+3] / 4);
 388                         feature_profiles(udev, &features[i]+4, features[i+3]);
 389                         break;
 390                 default:
 391                         info(udev, "GET CONFIGURATION: feature 0x%04x <ignored>, with 0x%02x bytes\n", feature, features[i+3]);
 392                         break;
 393                 }
 394         }
 395
 396         cur_profile = features[6] << 8 | features[7];
 397         if (cur_profile > 0) {
 398                 info(udev, "current profile 0x%02x\n", cur_profile);
 399         } else {
 400                 info(udev, "no current profile, assuming no media\n");
 401                 return -1;
 402         }
 403
 404         cd_media = 1;
 405
 406         switch (cur_profile) {
 407         case 0x03:
 408         case 0x04:
 409         case 0x05:
 410                 info(udev, "profile 0x%02x \n", cur_profile);
 411                 cd_media_mo = 1;
 412                 break;
 413         case 0x08:
 414                 info(udev, "profile 0x%02x media_cd_rom\n", cur_profile);
 415                 cd_media_cd_rom = 1;
 416                 break;
 417         case 0x09:
 418                 info(udev, "profile 0x%02x media_cd_r\n", cur_profile);
 419                 cd_media_cd_r = 1;
 420                 break;
 421         case 0x0a:
 422                 info(udev, "profile 0x%02x media_cd_rw\n", cur_profile);
 423                 cd_media_cd_rw = 1;
 424                 break;
 425         case 0x10:
 426                 info(udev, "profile 0x%02x media_dvd_ro\n", cur_profile);
 427                 cd_media_dvd_rom = 1;
 428                 break;
 429         case 0x11:
 430                 info(udev, "profile 0x%02x media_dvd_r\n", cur_profile);
 431                 cd_media_dvd_r = 1;
 432                 break;
 433         case 0x12:
 434                 info(udev, "profile 0x%02x media_dvd_ram\n", cur_profile);
 435                 cd_media_dvd_ram = 1;
 436                 break;
 437         case 0x13:
 438         case 0x14:
 439                 info(udev, "profile 0x%02x media_dvd_rw\n", cur_profile);
 440                 cd_media_dvd_rw = 1;
 441                 break;
 442         case 0x1B:
 443                 info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile);
 444                 cd_media_dvd_plus_r = 1;
 445                 break;
 446         case 0x1A:
 447                 info(udev, "profile 0x%02x media_dvd_plus_rw\n", cur_profile);
 448                 cd_media_dvd_plus_rw = 1;
 449                 break;
 450         case 0x2A:
 451                 info(udev, "profile 0x%02x media_dvd_plus_rw_dl\n", cur_profile);
 452                 cd_media_dvd_plus_rw_dl = 1;
 453                 break;
 454         case 0x2B:
 455                 info(udev, "profile 0x%02x media_dvd_plus_r_dl\n", cur_profile);
 456                 cd_media_dvd_plus_r_dl = 1;
 457                 break;
 458         case 0x40:
 459                 info(udev, "profile 0x%02x media_bd\n", cur_profile);
 460                 cd_media_bd = 1;
 461                 break;
 462         case 0x41:
 463         case 0x42:
 464                 info(udev, "profile 0x%02x media_bd_r\n", cur_profile);
 465                 cd_media_bd_r = 1;
 466                 break;
 467         case 0x43:
 468                 info(udev, "profile 0x%02x media_bd_re\n", cur_profile);
 469                 cd_media_bd_re = 1;
 470                 break;
 471         case 0x50:
 472                 info(udev, "profile 0x%02x media_hddvd\n", cur_profile);
 473                 cd_media_hddvd = 1;
 474                 break;
 475         case 0x51:
 476                 info(udev, "profile 0x%02x media_hddvd_r\n", cur_profile);
 477                 cd_media_hddvd_r = 1;
 478                 break;
 479         case 0x52:
 480                 info(udev, "profile 0x%02x media_hddvd_rw\n", cur_profile);
 481                 cd_media_hddvd_rw = 1;
 482                 break;
 483         default:
 484                 info(udev, "profile 0x%02x <ignored>\n", cur_profile);
 485                 break;
 486         }
 487         return 0;
 488 }
 489
 490 static int cd_media_info(struct udev *udev, int fd)
 491 {
 492         struct scsi_cmd sc;
 493         unsigned char header[32];
 494         static const char *media_status[] = {
 495                 "blank",
 496                 "appendable",
 497                 "complete",
 498                 "other"
 499         };
 500         int err;
 501
 502         scsi_cmd_init(udev, &sc, header, sizeof(header));
 503         scsi_cmd_set(udev, &sc, 0, 0x51);
 504         scsi_cmd_set(udev, &sc, 8, sizeof(header));
 505         scsi_cmd_set(udev, &sc, 9, 0);
 506         err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
 507         if ((err != 0)) {
 508                 info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
 509                 return -1;
 510         };
 511
 512         info(udev, "disk type %02x\n", header[8]);
 513
 514         /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
 515         if (!cd_media_cd_rom && (header[2] & 3) < 4)
 516                 cd_media_state = media_status[header[2] & 3];
 517
 518         if ((header[2] & 3) != 2)
 519                 cd_media_session_next = header[10] << 8 | header[5];
 520         cd_media_session_count = header[9] << 8 | header[4];
 521         cd_media_track_count = header[11] << 8 | header[6];
 522
 523         return 0;
 524 }
 525
 526 static int cd_media_toc(struct udev *udev, int fd)
 527 {
 528         struct scsi_cmd sc;
 529         unsigned char header[12];
 530         unsigned char toc[2048];
 531         unsigned int len, i;
 532         unsigned char *p;
 533         int err;
 534
 535         scsi_cmd_init(udev, &sc, header, sizeof(header));
 536         scsi_cmd_set(udev, &sc, 0, 0x43);
 537         scsi_cmd_set(udev, &sc, 6, 1);
 538         scsi_cmd_set(udev, &sc, 8, sizeof(header));
 539         scsi_cmd_set(udev, &sc, 9, 0);
 540         err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
 541         if ((err != 0)) {
 542                 info_scsi_cmd_err(udev, "READ TOC", err);
 543                 return -1;
 544         }
 545
 546         len = (header[0] << 8 | header[1]) + 2;
 547         info(udev, "READ TOC: len: %d\n", len);
 548         if (len > sizeof(toc))
 549                 return -1;
 550         if (len < 2)
 551                 return -1;
 552
 553         /* empty media has no tracks */
 554         if (len < 8)
 555                 return 0;
 556
 557         scsi_cmd_init(udev, &sc, toc, sizeof(toc));
 558         scsi_cmd_set(udev, &sc, 0, 0x43);
 559         scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
 560         scsi_cmd_set(udev, &sc, 7, len >> 8);
 561         scsi_cmd_set(udev, &sc, 8, len);
 562         scsi_cmd_set(udev, &sc, 9, 0);
 563         err = scsi_cmd_run(udev, &sc, fd, toc, len);
 564         if ((err != 0)) {
 565                 info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
 566                 return -1;
 567         }
 568
 569         for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
 570                 unsigned int block;
 571                 unsigned int is_data_track;
 572
 573                 is_data_track = (p[1] & 0x04) != 0;
 574
 575                 block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
 576                 info(udev, "track=%u info=0x%x(%s) start_block=%u\n",
 577                      p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
 578
 579                 if (is_data_track)
 580                         cd_media_track_count_data++;
 581                 else
 582                         cd_media_track_count_audio++;
 583         }
 584
 585         scsi_cmd_init(udev, &sc, header, sizeof(header));
 586         scsi_cmd_set(udev, &sc, 0, 0x43);
 587         scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
 588         scsi_cmd_set(udev, &sc, 8, 12);
 589         scsi_cmd_set(udev, &sc, 9, 0);
 590         err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
 591         if ((err != 0)) {
 592                 info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
 593                 return -1;
 594         }
 595         len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
 596         info(udev, "last track %u starts at block %u\n", header[4+2], len);
 597         cd_media_session_last_offset = (unsigned long long int)len * 2048;
 598         return 0;
 599 }
 600
 601 int main(int argc, char *argv[])
 602 {
 603         struct udev *udev;
 604         static const struct option options[] = {
 605                 { "export", no_argument, NULL, 'x' },
 606                 { "debug", no_argument, NULL, 'd' },
 607                 { "help", no_argument, NULL, 'h' },
 608                 {}
 609         };
 610         const char *node = NULL;
 611         int export = 0;
 612         int fd = -1;
 613         int cnt;
 614         int rc = 0;
 615
 616         udev = udev_new();
 617         if (udev == NULL)
 618                 goto exit;
 619
 620         udev_log_init("cdrom_id");
 621         udev_set_log_fn(udev, log_fn);
 622
 623         while (1) {
 624                 int option;
 625
 626                 option = getopt_long(argc, argv, "dxh", options, NULL);
 627                 if (option == -1)
 628                         break;
 629
 630                 switch (option) {
 631                 case 'd':
 632                         debug = 1;
 633                         if (udev_get_log_priority(udev) < LOG_INFO)
 634                                 udev_set_log_priority(udev, LOG_INFO);
 635                         break;
 636                 case 'x':
 637                         export = 1;
 638                         break;
 639                 case 'h':
 640                         printf("Usage: cdrom_id [options] <device>\n"
 641                                "  --export        export key/value pairs\n"
 642                                "  --debug         debug to stderr\n"
 643                                "  --help          print this help text\n\n");
 644                         goto exit;
 645                 default:
 646                         rc = 1;
 647                         goto exit;
 648                 }
 649         }
 650
 651         node = argv[optind];
 652         if (!node) {
 653                 err(udev, "no device\n");
 654                 fprintf(stderr, "no device\n");
 655                 rc = 1;
 656                 goto exit;
 657         }
 658
 659         srand((unsigned int)getpid());
 660         for (cnt = 20; cnt > 0; cnt--) {
 661                 struct timespec duration;
 662
 663                 fd = open(node, O_RDONLY|O_NONBLOCK|(is_mounted(node) ? 0 : O_EXCL));
 664                 if (fd >= 0 || errno != EBUSY)
 665                         break;
 666                 duration.tv_sec = 0;
 667                 duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000);
 668                 nanosleep(&duration, NULL);
 669         }
 670         if (fd < 0) {
 671                 info(udev, "unable to open '%s'\n", node);
 672                 fprintf(stderr, "unable to open '%s'\n", node);
 673                 rc = 1;
 674                 goto exit;
 675         }
 676         info(udev, "probing: '%s'\n", node);
 677
 678         /* same data as original cdrom_id */
 679         if (cd_capability_compat(udev, fd) < 0) {
 680                 rc = 1;
 681                 goto exit;
 682         }
 683
 684         /* check for media - don't bail if there's no media as we still need to
 685          * to read profiles */
 686         cd_media_compat(udev, fd);
 687
 688         /* check if drive talks MMC */
 689         if (cd_inquiry(udev, fd) < 0)
 690                 goto print;
 691
 692         /* read drive and possibly current profile */
 693         if (cd_profiles(udev, fd) < 0)
 694                 goto print;
 695
 696         /* get writable media state */
 697         if (cd_media_info(udev, fd) < 0)
 698                 goto print;
 699
 700         /* get session/track info */
 701         if (cd_media_toc(udev, fd) < 0)
 702                 goto print;
 703
 704 print:
 705         printf("ID_CDROM=1\n");
 706         if (cd_cd_rom)
 707                 printf("ID_CDROM_CD=1\n");
 708         if (cd_cd_r)
 709                 printf("ID_CDROM_CD_R=1\n");
 710         if (cd_cd_rw)
 711                 printf("ID_CDROM_CD_RW=1\n");
 712         if (cd_dvd_rom)
 713                 printf("ID_CDROM_DVD=1\n");
 714         if (cd_dvd_r)
 715                 printf("ID_CDROM_DVD_R=1\n");
 716         if (cd_dvd_rw)
 717                 printf("ID_CDROM_DVD_RW=1\n");
 718         if (cd_dvd_ram)
 719                 printf("ID_CDROM_DVD_RAM=1\n");
 720         if (cd_dvd_plus_r)
 721                 printf("ID_CDROM_DVD_PLUS_R=1\n");
 722         if (cd_dvd_plus_rw)
 723                 printf("ID_CDROM_DVD_PLUS_RW=1\n");
 724         if (cd_dvd_plus_r_dl)
 725                 printf("ID_CDROM_DVD_PLUS_R_DL=1\n");
 726         if (cd_dvd_plus_rw_dl)
 727                 printf("ID_CDROM_DVD_PLUS_RW_DL=1\n");
 728         if (cd_bd)
 729                 printf("ID_CDROM_BD=1\n");
 730         if (cd_bd_r)
 731                 printf("ID_CDROM_BD_R=1\n");
 732         if (cd_bd_re)
 733                 printf("ID_CDROM_BD_RE=1\n");
 734         if (cd_hddvd)
 735                 printf("ID_CDROM_HDDVD=1\n");
 736         if (cd_hddvd_r)
 737                 printf("ID_CDROM_HDDVD_R=1\n");
 738         if (cd_hddvd_rw)
 739                 printf("ID_CDROM_HDDVD_RW=1\n");
 740         if (cd_mo)
 741                 printf("ID_CDROM_MO=1\n");
 742         if (cd_mrw)
 743                 printf("ID_CDROM_MRW=1\n");
 744         if (cd_mrw_w)
 745                 printf("ID_CDROM_MRW_W=1\n");
 746
 747         if (cd_media)
 748                 printf("ID_CDROM_MEDIA=1\n");
 749         if (cd_media_mo)
 750                 printf("ID_CDROM_MEDIA_MO=1\n");
 751         if (cd_media_mrw)
 752                 printf("ID_CDROM_MEDIA_MRW=1\n");
 753         if (cd_media_mrw_w)
 754                 printf("ID_CDROM_MEDIA_MRW_W=1\n");
 755         if (cd_media_cd_rom)
 756                 printf("ID_CDROM_MEDIA_CD=1\n");
 757         if (cd_media_cd_r)
 758                 printf("ID_CDROM_MEDIA_CD_R=1\n");
 759         if (cd_media_cd_rw)
 760                 printf("ID_CDROM_MEDIA_CD_RW=1\n");
 761         if (cd_media_dvd_rom)
 762                 printf("ID_CDROM_MEDIA_DVD=1\n");
 763         if (cd_media_dvd_r)
 764                 printf("ID_CDROM_MEDIA_DVD_R=1\n");
 765         if (cd_media_dvd_ram)
 766                 printf("ID_CDROM_MEDIA_DVD_RAM=1\n");
 767         if (cd_media_dvd_rw)
 768                 printf("ID_CDROM_MEDIA_DVD_RW=1\n");
 769         if (cd_media_dvd_plus_r)
 770                 printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n");
 771         if (cd_media_dvd_plus_rw)
 772                 printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n");
 773         if (cd_media_dvd_plus_rw_dl)
 774                 printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n");
 775         if (cd_media_dvd_plus_r_dl)
 776                 printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n");
 777         if (cd_media_bd)
 778                 printf("ID_CDROM_MEDIA_BD=1\n");
 779         if (cd_media_bd_r)
 780                 printf("ID_CDROM_MEDIA_BD_R=1\n");
 781         if (cd_media_bd_re)
 782                 printf("ID_CDROM_MEDIA_BD_RE=1\n");
 783         if (cd_media_hddvd)
 784                 printf("ID_CDROM_MEDIA_HDDVD=1\n");
 785         if (cd_media_hddvd_r)
 786                 printf("ID_CDROM_MEDIA_HDDVD_R=1\n");
 787         if (cd_media_hddvd_rw)
 788                 printf("ID_CDROM_MEDIA_HDDVD_RW=1\n");
 789
 790         if (cd_media_state != NULL)
 791                 printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state);
 792         if (cd_media_session_next > 0)
 793                 printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
 794         if (cd_media_session_count > 0)
 795                 printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
 796         if (cd_media_track_count > 0)
 797                 printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
 798         if (cd_media_track_count_audio > 0)
 799                 printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);
 800         if (cd_media_track_count_data > 0)
 801                 printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);
 802         if (cd_media_session_last_offset > 0)
 803                 printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);
 804 exit:
 805         if (fd >= 0)
 806                 close(fd);
 807         udev_unref(udev);
 808         udev_log_close();
 809         return rc;
 810 }
 811