/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * cdrom_id - optical drive and media information prober */ #include #include #include #include #include #include #include "build.h" #include "fd-util.h" #include "main-func.h" #include "memory-util.h" #include "random-util.h" #include "sort-util.h" #include "string-table.h" #include "string-util.h" #include "udev-util.h" #include "unaligned.h" static bool arg_eject = false; static bool arg_lock = false; static bool arg_unlock = false; static const char *arg_node = NULL; typedef enum Feature { FEATURE_RW_NONREMOVABLE = 0x01, FEATURE_RW_REMOVABLE = 0x02, FEATURE_MO_SE = 0x03, /* sector erase */ FEATURE_MO_WO = 0x04, /* write once */ FEATURE_MO_AS = 0x05, /* advance storage */ FEATURE_CD_ROM = 0x08, FEATURE_CD_R = 0x09, FEATURE_CD_RW = 0x0a, FEATURE_DVD_ROM = 0x10, FEATURE_DVD_R = 0x11, FEATURE_DVD_RAM = 0x12, FEATURE_DVD_RW_RO = 0x13, /* restricted overwrite mode */ FEATURE_DVD_RW_SEQ = 0x14, /* sequential mode */ FEATURE_DVD_R_DL_SEQ = 0x15, /* sequential recording */ FEATURE_DVD_R_DL_JR = 0x16, /* jump recording */ FEATURE_DVD_RW_DL = 0x17, FEATURE_DVD_R_DDR = 0x18, /* download disc recording - dvd for css managed recording */ FEATURE_DVD_PLUS_RW = 0x1a, FEATURE_DVD_PLUS_R = 0x1b, FEATURE_DDCD_ROM = 0x20, FEATURE_DDCD_R = 0x21, FEATURE_DDCD_RW = 0x22, FEATURE_DVD_PLUS_RW_DL = 0x2a, FEATURE_DVD_PLUS_R_DL = 0x2b, FEATURE_BD = 0x40, FEATURE_BD_R_SRM = 0x41, /* sequential recording mode */ FEATURE_BD_R_RRM = 0x42, /* random recording mode */ FEATURE_BD_RE = 0x43, FEATURE_HDDVD = 0x50, FEATURE_HDDVD_R = 0x51, FEATURE_HDDVD_RAM = 0x52, FEATURE_HDDVD_RW = 0x53, FEATURE_HDDVD_R_DL = 0x58, FEATURE_HDDVD_RW_DL = 0x5a, FEATURE_MRW, FEATURE_MRW_W, _FEATURE_MAX, _FEATURE_INVALID = -EINVAL, } Feature; typedef enum MediaState { MEDIA_STATE_BLANK = 0, MEDIA_STATE_APPENDABLE = 1, MEDIA_STATE_COMPLETE = 2, MEDIA_STATE_OTHER = 3, _MEDIA_STATE_MAX, _MEDIA_STATE_INVALID = -EINVAL, } MediaState; typedef struct Context { int fd; Feature *drive_features; size_t n_drive_feature; Feature media_feature; bool has_media; MediaState media_state; unsigned media_session_next; unsigned media_session_count; unsigned media_track_count; unsigned media_track_count_data; unsigned media_track_count_audio; uint64_t media_session_last_offset; } Context; #define CONTEXT_EMPTY { \ .fd = -EBADF, \ .media_feature = _FEATURE_INVALID, \ .media_state = _MEDIA_STATE_INVALID, \ } static void context_clear(Context *c) { if (!c) return; safe_close(c->fd); free(c->drive_features); } static bool drive_has_feature(const Context *c, Feature f) { assert(c); for (size_t i = 0; i < c->n_drive_feature; i++) if (c->drive_features[i] == f) return true; return false; } static int set_drive_feature(Context *c, Feature f) { assert(c); if (drive_has_feature(c, f)) return 0; if (!GREEDY_REALLOC(c->drive_features, c->n_drive_feature + 1)) return -ENOMEM; c->drive_features[c->n_drive_feature++] = f; return 1; } #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13])) #define SK(errcode) (((errcode) >> 16) & 0xFU) #define ASC(errcode) (((errcode) >> 8) & 0xFFU) #define ASCQ(errcode) ((errcode) & 0xFFU) #define CHECK_CONDITION 0x01 static int log_scsi_debug_errno(int error, const char *msg) { assert(error != 0); /* error < 0 means errno-style error, error > 0 means SCSI error */ if (error < 0) return log_debug_errno(error, "Failed to %s: %m", msg); return log_debug_errno(SYNTHETIC_ERRNO(EIO), "Failed to %s with SK=%X/ASC=%02X/ACQ=%02X", msg, SK(error), ASC(error), ASCQ(error)); } struct scsi_cmd { struct cdrom_generic_command cgc; union { struct request_sense s; unsigned char u[18]; } _sense; struct sg_io_hdr sg_io; }; static void scsi_cmd_init(struct scsi_cmd *cmd) { memzero(cmd, sizeof(struct scsi_cmd)); cmd->cgc.quiet = 1; cmd->cgc.sense = &cmd->_sense.s; cmd->sg_io.interface_id = 'S'; cmd->sg_io.mx_sb_len = sizeof(cmd->_sense); cmd->sg_io.cmdp = cmd->cgc.cmd; cmd->sg_io.sbp = cmd->_sense.u; cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO; } static void scsi_cmd_set(struct scsi_cmd *cmd, size_t i, unsigned char arg) { cmd->sg_io.cmd_len = i + 1; cmd->cgc.cmd[i] = arg; } static int scsi_cmd_run(struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize) { int r; assert(cmd); assert(fd >= 0); assert(buf || bufsize == 0); /* Return 0 on success. On failure, return negative errno or positive error code. */ if (bufsize > 0) { cmd->sg_io.dxferp = buf; cmd->sg_io.dxfer_len = bufsize; cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV; } else cmd->sg_io.dxfer_direction = SG_DXFER_NONE; if (ioctl(fd, SG_IO, &cmd->sg_io) < 0) return -errno; if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) { if (cmd->sg_io.masked_status & CHECK_CONDITION) { r = ERRCODE(cmd->_sense.u); if (r != 0) return r; } return -EIO; } return 0; } static int scsi_cmd_run_and_log(struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize, const char *msg) { int r; assert(msg); r = scsi_cmd_run(cmd, fd, buf, bufsize); if (r != 0) return log_scsi_debug_errno(r, msg); return 0; } static int media_lock(int fd, bool lock) { /* disable the kernel's lock logic */ if (ioctl(fd, CDROM_CLEAR_OPTIONS, CDO_LOCK) < 0) log_debug_errno(errno, "Failed to issue ioctl(CDROM_CLEAR_OPTIONS, CDO_LOCK), ignoring: %m"); if (ioctl(fd, CDROM_LOCKDOOR, lock ? 1 : 0) < 0) return log_debug_errno(errno, "Failed to issue ioctl(CDROM_LOCKDOOR): %m"); return 0; } static int media_eject(int fd) { struct scsi_cmd sc; scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_START_STOP_UNIT); scsi_cmd_set(&sc, 4, 0x02); scsi_cmd_set(&sc, 5, 0); return scsi_cmd_run_and_log(&sc, fd, NULL, 0, "start/stop unit"); } static int cd_capability_compat(Context *c) { int capability, r; assert(c); capability = ioctl(c->fd, CDROM_GET_CAPABILITY, NULL); if (capability < 0) return log_debug_errno(errno, "CDROM_GET_CAPABILITY failed"); if (capability & CDC_CD_R) { r = set_drive_feature(c, FEATURE_CD_R); if (r < 0) return log_oom_debug(); } if (capability & CDC_CD_RW) { r = set_drive_feature(c, FEATURE_CD_RW); if (r < 0) return log_oom_debug(); } if (capability & CDC_DVD) { r = set_drive_feature(c, FEATURE_DVD_ROM); if (r < 0) return log_oom_debug(); } if (capability & CDC_DVD_R) { r = set_drive_feature(c, FEATURE_DVD_R); if (r < 0) return log_oom_debug(); } if (capability & CDC_DVD_RAM) { r = set_drive_feature(c, FEATURE_DVD_RAM); if (r < 0) return log_oom_debug(); } if (capability & CDC_MRW) { r = set_drive_feature(c, FEATURE_MRW); if (r < 0) return log_oom_debug(); } if (capability & CDC_MRW_W) { r = set_drive_feature(c, FEATURE_MRW_W); if (r < 0) return log_oom_debug(); } return 0; } static int cd_media_compat(Context *c) { int r; assert(c); r = ioctl(c->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); if (r < 0) return log_debug_errno(errno, "ioctl(CDROM_DRIVE_STATUS) failed: %m"); if (r != CDS_DISC_OK) return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), "ioctl(CDROM_DRIVE_STATUS) → %d (%s), ignoring.", r, r == CDS_NO_INFO ? "no info" : r == CDS_NO_DISC ? "no disc" : r == CDS_TRAY_OPEN ? "tray open" : r == CDS_DRIVE_NOT_READY ? "drive not ready" : "unknown status"); c->has_media = true; return 0; } static int cd_inquiry(Context *c) { struct scsi_cmd sc; unsigned char inq[36]; int r; assert(c); scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_INQUIRY); scsi_cmd_set(&sc, 4, sizeof(inq)); scsi_cmd_set(&sc, 5, 0); r = scsi_cmd_run_and_log(&sc, c->fd, inq, sizeof(inq), "inquire"); if (r < 0) return r; if ((inq[0] & 0x1F) != 5) return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Not an MMC unit."); log_debug("INQUIRY: [%.8s][%.16s][%.4s]", inq + 8, inq + 16, inq + 32); return 0; } static int feature_profiles(Context *c, const unsigned char *profiles, size_t size) { int r; assert(c); for (size_t i = 0; i + 4 <= size; i += 4) { r = set_drive_feature(c, (Feature) unaligned_read_be16(&profiles[i])); if (r < 0) return log_oom_debug(); } return 1; } static int cd_profiles_old_mmc(Context *c) { disc_information discinfo; struct scsi_cmd sc; size_t len; int r; assert(c); scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_DISC_INFO); scsi_cmd_set(&sc, 8, sizeof(discinfo.disc_information_length)); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, (unsigned char *)&discinfo.disc_information_length, sizeof(discinfo.disc_information_length), "read disc information"); if (r >= 0) { /* Not all drives have the same disc_info length, so requeue * packet with the length the drive tells us it can supply */ len = be16toh(discinfo.disc_information_length) + sizeof(discinfo.disc_information_length); if (len > sizeof(discinfo)) len = sizeof(discinfo); scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_DISC_INFO); scsi_cmd_set(&sc, 8, len); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, (unsigned char *)&discinfo, len, "read disc information"); } if (r < 0) { if (c->has_media) { log_debug("No current profile, but disc is present; assuming CD-ROM."); c->media_feature = FEATURE_CD_ROM; c->media_track_count = 1; c->media_track_count_data = 1; return 1; } else return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), "no current profile, assuming no media."); }; c->has_media = true; if (discinfo.erasable) c->media_feature = FEATURE_CD_RW; else if (discinfo.disc_status < 2 && drive_has_feature(c, FEATURE_CD_R)) c->media_feature = FEATURE_CD_R; else c->media_feature = FEATURE_CD_ROM; return 0; } static int cd_profiles(Context *c) { struct scsi_cmd sc; unsigned char features[65530]; unsigned cur_profile; size_t len; int r; assert(c); /* First query the current profile */ scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_GET_CONFIGURATION); scsi_cmd_set(&sc, 8, 8); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run(&sc, c->fd, features, 8); if (r != 0) { /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ if (r > 0 && SK(r) == 0x5 && IN_SET(ASC(r), 0x20, 0x24)) { log_debug("Drive is pre-MMC2 and does not support 46h get configuration command; " "trying to work around the problem."); return cd_profiles_old_mmc(c); } return log_scsi_debug_errno(r, "get configuration"); } cur_profile = unaligned_read_be16(&features[6]); if (cur_profile > 0) { log_debug("current profile 0x%02x", cur_profile); c->media_feature = (Feature) cur_profile; c->has_media = true; } else { log_debug("no current profile, assuming no media"); c->has_media = false; } len = unaligned_read_be32(features); log_debug("GET CONFIGURATION: size of features buffer %zu", len); if (len > sizeof(features)) { log_debug("Cannot get features in a single query, truncating."); len = sizeof(features); } else if (len <= 8) len = sizeof(features); /* Now get the full feature buffer */ scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_GET_CONFIGURATION); scsi_cmd_set(&sc, 7, (len >> 8) & 0xff); scsi_cmd_set(&sc, 8, len & 0xff); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, features, len, "get configuration"); if (r < 0) return r; /* parse the length once more, in case the drive decided to have other features suddenly :) */ len = unaligned_read_be32(features); log_debug("GET CONFIGURATION: size of features buffer %zu", len); if (len > sizeof(features)) { log_debug("Cannot get features in a single query, truncating."); len = sizeof(features); } /* device features */ for (size_t i = 8; i + 4 < len; i += 4 + features[i + 3]) { unsigned feature; feature = unaligned_read_be16(&features[i]); switch (feature) { case 0x00: log_debug("GET CONFIGURATION: feature 'profiles', with %u entries", features[i + 3] / 4); feature_profiles(c, features + i + 4, MIN(features[i + 3], len - i - 4)); break; default: log_debug("GET CONFIGURATION: feature 0x%04x , with 0x%02x bytes", feature, features[i + 3]); break; } } return c->has_media; } static const char * const media_state_table[_MEDIA_STATE_MAX] = { [MEDIA_STATE_BLANK] = "blank", [MEDIA_STATE_APPENDABLE] = "appendable", [MEDIA_STATE_COMPLETE] = "complete", [MEDIA_STATE_OTHER] = "other", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(media_state, MediaState); static int dvd_ram_media_update_state(Context *c) { struct scsi_cmd sc; unsigned char dvdstruct[8]; unsigned char format[12]; unsigned char len; int r; assert(c); /* Return 1 if media state is determined. */ if (c->media_feature != FEATURE_DVD_RAM) return 0; /* a write protected dvd-ram may report "complete" status */ scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_DVD_STRUCTURE); scsi_cmd_set(&sc, 7, 0xC0); scsi_cmd_set(&sc, 9, sizeof(dvdstruct)); scsi_cmd_set(&sc, 11, 0); r = scsi_cmd_run_and_log(&sc, c->fd, dvdstruct, sizeof(dvdstruct), "read DVD structure"); if (r < 0) return r; if (dvdstruct[4] & 0x02) { c->media_state = MEDIA_STATE_COMPLETE; log_debug("Write-protected DVD-RAM media inserted"); return 1; } /* let's make sure we don't try to read unformatted media */ scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_FORMAT_CAPACITIES); scsi_cmd_set(&sc, 8, sizeof(format)); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, format, sizeof(format), "read DVD format capacities"); if (r < 0) return r; len = format[3]; if (len & 7 || len < 16) return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid format capacities length."); switch (format[8] & 3) { case 1: /* This means that last format was interrupted or failed, blank dvd-ram discs are * factory formatted. Take no action here as it takes quite a while to reformat a * dvd-ram and it's not automatically started. */ log_debug("Unformatted DVD-RAM media inserted."); return 1; case 2: log_debug("Formatted DVD-RAM media inserted."); return 0; case 3: c->has_media = false; return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), "Format capacities returned no media."); } return 0; } static int dvd_media_update_state(Context *c) { struct scsi_cmd sc; unsigned char buffer[32 * 2048]; int r; r = dvd_ram_media_update_state(c); if (r != 0) return r; /* Take a closer look at formatted media (unformatted DVD+RW * has "blank" status", DVD-RAM was examined earlier) and check * for ISO and UDF PVDs or a fs superblock presence and do it * in one ioctl (we need just sectors 0 and 16) */ scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_10); scsi_cmd_set(&sc, 5, 0); scsi_cmd_set(&sc, 8, sizeof(buffer)/2048); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, buffer, sizeof(buffer), "read first 32 blocks"); if (r < 0) { c->has_media = false; return r; } /* if any non-zero data is found in sector 16 (iso and udf) or * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc * is assumed non-blank */ for (size_t offset = 32768; offset < 32768 + 2048; offset++) if (buffer[offset] != 0) { log_debug("Data in block 16, assuming complete."); return 0; } for (size_t offset = 0; offset < 2048; offset++) if (buffer[offset] != 0) { log_debug("Data in block 0, assuming complete."); return 0; } log_debug("No data in blocks 0 or 16, assuming blank."); c->media_state = MEDIA_STATE_BLANK; return 0; } static int cd_media_info(Context *c) { struct scsi_cmd sc; unsigned char header[32]; MediaState state; int r; assert(c); scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_DISC_INFO); scsi_cmd_set(&sc, 8, sizeof(header)); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, header, sizeof(header), "read disc information"); if (r < 0) return r; c->has_media = true; log_debug("disk type %02x", header[8]); state = (MediaState) (header[2] & 0x03); log_debug("hardware reported media status: %s", strna(media_state_to_string(state))); /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */ if (c->media_feature != FEATURE_CD_ROM) c->media_state = state; /* fresh DVD-RW in restricted overwrite mode reports itself as * "appendable"; change it to "blank" to make it consistent with what * gets reported after blanking, and what userspace expects. */ if (c->media_feature == FEATURE_DVD_RW_RO && state == MEDIA_STATE_APPENDABLE) c->media_state = MEDIA_STATE_BLANK; /* DVD+RW discs (and DVD-RW in restricted mode) once formatted are * always "complete", DVD-RAM are "other" or "complete" if the disc is * write protected; we need to check the contents if it is blank */ if (IN_SET(c->media_feature, FEATURE_DVD_RW_RO, FEATURE_DVD_PLUS_RW, FEATURE_DVD_PLUS_RW_DL, FEATURE_DVD_RAM) && IN_SET(state, MEDIA_STATE_COMPLETE, MEDIA_STATE_OTHER)) { r = dvd_media_update_state(c); if (r < 0) return r; } /* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in * restricted overwrite mode can never append, only in sequential mode */ if (c->media_feature != FEATURE_DVD_RW_RO && IN_SET(state, MEDIA_STATE_BLANK, MEDIA_STATE_APPENDABLE)) c->media_session_next = header[10] << 8 | header[5]; c->media_session_count = header[9] << 8 | header[4]; c->media_track_count = header[11] << 8 | header[6]; return 0; } static int cd_media_toc(Context *c) { struct scsi_cmd sc; unsigned char header[12]; unsigned char toc[65536]; unsigned num_tracks; size_t len; int r; assert(c); scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_TOC_PMA_ATIP); scsi_cmd_set(&sc, 6, 1); scsi_cmd_set(&sc, 8, sizeof(header)); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, header, sizeof(header), "read TOC"); if (r < 0) return r; len = unaligned_read_be16(header) + 2; log_debug("READ TOC: len: %zu, start track: %u, end track: %u", len, header[2], header[3]); if (len > sizeof(toc)) return -1; /* empty media has no tracks */ if (len < 8) return 0; /* 2: first track, 3: last track */ num_tracks = header[3] - header[2] + 1; scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_TOC_PMA_ATIP); scsi_cmd_set(&sc, 6, header[2]); /* First Track/Session Number */ scsi_cmd_set(&sc, 7, (len >> 8) & 0xff); scsi_cmd_set(&sc, 8, len & 0xff); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, toc, len, "read TOC (tracks)"); if (r < 0) return r; /* Take care to not iterate beyond the last valid track as specified in * the TOC, but also avoid going beyond the TOC length, just in case * the last track number is invalidly large */ for (size_t i = 4; i + 8 <= len && num_tracks > 0; i += 8, --num_tracks) { bool is_data_track; uint32_t block; is_data_track = (toc[i + 1] & 0x04) != 0; block = unaligned_read_be32(&toc[i + 4]); log_debug("track=%u info=0x%x(%s) start_block=%"PRIu32, toc[i + 2], toc[i + 1] & 0x0FU, is_data_track ? "data":"audio", block); if (is_data_track) c->media_track_count_data++; else c->media_track_count_audio++; } scsi_cmd_init(&sc); scsi_cmd_set(&sc, 0, GPCMD_READ_TOC_PMA_ATIP); scsi_cmd_set(&sc, 2, 1); /* Session Info */ scsi_cmd_set(&sc, 8, sizeof(header)); scsi_cmd_set(&sc, 9, 0); r = scsi_cmd_run_and_log(&sc, c->fd, header, sizeof(header), "read TOC (multi session)"); if (r < 0) return r; len = unaligned_read_be32(&header[8]); log_debug("last track %u starts at block %zu", header[4+2], len); c->media_session_last_offset = (uint64_t) len * 2048; return 0; } static int open_drive(Context *c) { int fd; assert(c); assert(c->fd < 0); for (int cnt = 0;; cnt++) { fd = open(arg_node, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY); if (fd >= 0) break; if (++cnt >= 20 || errno != EBUSY) return log_debug_errno(errno, "Unable to open '%s': %m", arg_node); (void) usleep_safe(100 * USEC_PER_MSEC + random_u64_range(100 * USEC_PER_MSEC)); } log_debug("probing: '%s'", arg_node); c->fd = fd; return 0; } typedef struct FeatureToString { Feature feature; const char *str; } FeatureToString; static const FeatureToString feature_to_string[] = { { .feature = FEATURE_RW_NONREMOVABLE, .str = "RW_NONREMOVABLE", }, { .feature = FEATURE_RW_REMOVABLE, .str = "RW_REMOVABLE", }, { .feature = FEATURE_MO_SE, .str = "MO_SE", }, { .feature = FEATURE_MO_WO, .str = "MO_WO", }, { .feature = FEATURE_MO_AS, .str = "MO_AS", }, { .feature = FEATURE_CD_ROM, .str = "CD", }, { .feature = FEATURE_CD_R, .str = "CD_R", }, { .feature = FEATURE_CD_RW, .str = "CD_RW", }, { .feature = FEATURE_DVD_ROM, .str = "DVD", }, { .feature = FEATURE_DVD_R, .str = "DVD_R", }, { .feature = FEATURE_DVD_RAM, .str = "DVD_RAM", }, { .feature = FEATURE_DVD_RW_RO, .str = "DVD_RW_RO", }, { .feature = FEATURE_DVD_RW_SEQ, .str = "DVD_RW_SEQ", }, { .feature = FEATURE_DVD_R_DL_SEQ, .str = "DVD_R_DL_SEQ", }, { .feature = FEATURE_DVD_R_DL_JR, .str = "DVD_R_DL_JR", }, { .feature = FEATURE_DVD_RW_DL, .str = "DVD_RW_DL", }, { .feature = FEATURE_DVD_R_DDR, .str = "DVD_R_DDR", }, { .feature = FEATURE_DVD_PLUS_RW, .str = "DVD_PLUS_RW", }, { .feature = FEATURE_DVD_PLUS_R, .str = "DVD_PLUS_R", }, { .feature = FEATURE_DDCD_ROM, .str = "DDCD", }, { .feature = FEATURE_DDCD_R, .str = "DDCD_R", }, { .feature = FEATURE_DDCD_RW, .str = "DDCD_RW", }, { .feature = FEATURE_DVD_PLUS_RW_DL, .str = "DVD_PLUS_RW_DL", }, { .feature = FEATURE_DVD_PLUS_R_DL, .str = "DVD_PLUS_R_DL", }, { .feature = FEATURE_BD, .str = "BD", }, { .feature = FEATURE_BD_R_SRM, .str = "BD_R_SRM", }, { .feature = FEATURE_BD_R_RRM, .str = "BD_R_RRM", }, { .feature = FEATURE_BD_RE, .str = "BD_RE", }, { .feature = FEATURE_HDDVD, .str = "HDDVD", }, { .feature = FEATURE_HDDVD_R, .str = "HDDVD_R", }, { .feature = FEATURE_HDDVD_RAM, .str = "HDDVD_RAM", }, { .feature = FEATURE_HDDVD_RW, .str = "HDDVD_RW", }, { .feature = FEATURE_HDDVD_R_DL, .str = "HDDVD_R_DL", }, { .feature = FEATURE_HDDVD_RW_DL, .str = "HDDVD_RW_DL", }, { .feature = FEATURE_MRW, .str = "MRW", }, { .feature = FEATURE_MRW_W, .str = "MRW_W", }, }; static int feature_to_string_compare_func(const FeatureToString *a, const FeatureToString *b) { assert(a); assert(b); return CMP(a->feature, b->feature); } static void print_feature(Feature feature, const char *prefix) { const FeatureToString *found, in = { .feature = feature, }; assert(prefix); found = typesafe_bsearch(&in, feature_to_string, ELEMENTSOF(feature_to_string), feature_to_string_compare_func); if (!found) return (void) log_debug("Unknown feature 0x%02x, ignoring.", (unsigned) feature); printf("%s_%s=1\n", prefix, found->str); } static void print_properties(const Context *c) { const char *state; assert(c); printf("ID_CDROM=1\n"); for (size_t i = 0; i < c->n_drive_feature; i++) print_feature(c->drive_features[i], "ID_CDROM"); if (drive_has_feature(c, FEATURE_MO_SE) || drive_has_feature(c, FEATURE_MO_WO) || drive_has_feature(c, FEATURE_MO_AS)) printf("ID_CDROM_MO=1\n"); if (drive_has_feature(c, FEATURE_DVD_RW_RO) || drive_has_feature(c, FEATURE_DVD_RW_SEQ)) printf("ID_CDROM_DVD_RW=1\n"); if (drive_has_feature(c, FEATURE_DVD_R_DL_SEQ) || drive_has_feature(c, FEATURE_DVD_R_DL_JR)) printf("ID_CDROM_DVD_R_DL=1\n"); if (drive_has_feature(c, FEATURE_DVD_R_DDR)) printf("ID_CDROM_DVD_R=1\n"); if (drive_has_feature(c, FEATURE_BD_R_SRM) || drive_has_feature(c, FEATURE_BD_R_RRM)) printf("ID_CDROM_BD_R=1\n"); if (c->has_media) { printf("ID_CDROM_MEDIA=1\n"); print_feature(c->media_feature, "ID_CDROM_MEDIA"); if (IN_SET(c->media_feature, FEATURE_MO_SE, FEATURE_MO_WO, FEATURE_MO_AS)) printf("ID_CDROM_MEDIA_MO=1\n"); if (IN_SET(c->media_feature, FEATURE_DVD_RW_RO, FEATURE_DVD_RW_SEQ)) printf("ID_CDROM_MEDIA_DVD_RW=1\n"); if (IN_SET(c->media_feature, FEATURE_DVD_R_DL_SEQ, FEATURE_DVD_R_DL_JR)) printf("ID_CDROM_MEDIA_DVD_R_DL=1\n"); if (c->media_feature == FEATURE_DVD_R_DDR) printf("ID_CDROM_MEDIA_DVD_R=1\n"); if (IN_SET(c->media_feature, FEATURE_BD_R_SRM, FEATURE_BD_R_RRM)) printf("ID_CDROM_MEDIA_BD_R=1\n"); } state = media_state_to_string(c->media_state); if (state) printf("ID_CDROM_MEDIA_STATE=%s\n", state); if (c->media_session_next > 0) printf("ID_CDROM_MEDIA_SESSION_NEXT=%u\n", c->media_session_next); if (c->media_session_count > 0) printf("ID_CDROM_MEDIA_SESSION_COUNT=%u\n", c->media_session_count); if (c->media_session_count > 1 && c->media_session_last_offset > 0) printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%" PRIu64 "\n", c->media_session_last_offset); if (c->media_track_count > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT=%u\n", c->media_track_count); if (c->media_track_count_audio > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%u\n", c->media_track_count_audio); if (c->media_track_count_data > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%u\n", c->media_track_count_data); } static int help(void) { printf("%s [OPTIONS...] DEVICE\n\n" " -l --lock-media Lock the media (to enable eject request events)\n" " -u --unlock-media Unlock the media\n" " -e --eject-media Eject the media\n" " -d --debug Print debug messages to stderr\n" " -h --help Show this help text\n" " --version Show package version\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { static const struct option options[] = { { "lock-media", no_argument, NULL, 'l' }, { "unlock-media", no_argument, NULL, 'u' }, { "eject-media", no_argument, NULL, 'e' }, { "debug", no_argument, NULL, 'd' }, { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'v' }, {} }; int c; while ((c = getopt_long(argc, argv, "deluh", options, NULL)) >= 0) switch (c) { case 'l': arg_lock = true; break; case 'u': arg_unlock = true; break; case 'e': arg_eject = true; break; case 'd': log_set_target(LOG_TARGET_CONSOLE); log_set_max_level(LOG_DEBUG); log_open(); break; case 'h': return help(); case 'v': return version(); case '?': return -EINVAL; default: assert_not_reached(); } arg_node = argv[optind]; if (!arg_node) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No device specified."); return 1; } static int run(int argc, char *argv[]) { _cleanup_(context_clear) Context c = CONTEXT_EMPTY; int r; (void) udev_parse_config(); log_setup(); r = parse_argv(argc, argv); if (r <= 0) return r; r = open_drive(&c); if (r < 0) return r; /* same data as original cdrom_id */ r = cd_capability_compat(&c); if (r < 0) return r; /* check for media - don't bail if there's no media as we still need to * to read profiles */ (void) cd_media_compat(&c); /* check if drive talks MMC */ if (cd_inquiry(&c) < 0) goto work; r = cd_profiles(&c); /* read drive and possibly current profile */ if (r > 0) { /* at this point we are guaranteed to have media in the drive - find out more about it */ /* get session/track info */ (void) cd_media_toc(&c); /* get writable media state */ (void) cd_media_info(&c); } work: /* lock the media, so we enable eject button events */ if (arg_lock && c.has_media) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (lock)"); (void) media_lock(c.fd, true); } if (arg_unlock && c.has_media) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)"); (void) media_lock(c.fd, false); } if (arg_eject) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)"); (void) media_lock(c.fd, false); log_debug("START_STOP_UNIT (eject)"); (void) media_eject(c.fd); } print_properties(&c); return 0; } DEFINE_MAIN_FUNCTION(run);