/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * cdrom_id - optical drive and media information prober */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "log.h" #include "memory-util.h" #include "random-util.h" #include "udev-util.h" static bool arg_eject = false; static bool arg_lock = false; static bool arg_unlock = false; static const char *arg_node = NULL; /* device info */ static unsigned cd_rw_nonremovable; static unsigned cd_rw_removable; static unsigned cd_cd_rom; static unsigned cd_cd_r; static unsigned cd_cd_rw; static unsigned cd_ddcd_rom; static unsigned cd_ddcd_r; static unsigned cd_ddcd_rw; static unsigned cd_dvd_rom; static unsigned cd_dvd_r; static unsigned cd_dvd_r_ddr; static unsigned cd_dvd_r_dl; static unsigned cd_dvd_r_dl_seq; static unsigned cd_dvd_r_dl_jr; static unsigned cd_dvd_rw; static unsigned cd_dvd_rw_ro; static unsigned cd_dvd_rw_seq; static unsigned cd_dvd_rw_dl; static unsigned cd_dvd_ram; static unsigned cd_dvd_plus_r; static unsigned cd_dvd_plus_rw; static unsigned cd_dvd_plus_r_dl; static unsigned cd_dvd_plus_rw_dl; static unsigned cd_bd; static unsigned cd_bd_r; static unsigned cd_bd_r_srm; static unsigned cd_bd_r_rrm; static unsigned cd_bd_re; static unsigned cd_hddvd; static unsigned cd_hddvd_r; static unsigned cd_hddvd_r_dl; static unsigned cd_hddvd_ram; static unsigned cd_hddvd_rw; static unsigned cd_hddvd_rw_dl; static unsigned cd_mo; static unsigned cd_mo_se; static unsigned cd_mo_wo; static unsigned cd_mo_as; static unsigned cd_mrw; static unsigned cd_mrw_w; /* media info */ static unsigned cd_media; static unsigned cd_media_rw_nonremovable; static unsigned cd_media_rw_removable; static unsigned cd_media_cd_rom; static unsigned cd_media_cd_r; static unsigned cd_media_cd_rw; static unsigned cd_media_ddcd_rom; static unsigned cd_media_ddcd_r; static unsigned cd_media_ddcd_rw; static unsigned cd_media_dvd_rom; static unsigned cd_media_dvd_r; static unsigned cd_media_dvd_r_ddr; /* download disc recording - dvd for css managed recording */ static unsigned cd_media_dvd_r_dl; static unsigned cd_media_dvd_r_dl_seq; /* sequential recording */ static unsigned cd_media_dvd_r_dl_jr; /* jump recording */ static unsigned cd_media_dvd_rw; static unsigned cd_media_dvd_rw_ro; /* restricted overwrite mode */ static unsigned cd_media_dvd_rw_seq; /* sequential mode */ static unsigned cd_media_dvd_rw_dl; static unsigned cd_media_dvd_ram; static unsigned cd_media_dvd_plus_r; static unsigned cd_media_dvd_plus_rw; static unsigned cd_media_dvd_plus_r_dl; static unsigned cd_media_dvd_plus_rw_dl; static unsigned cd_media_bd; static unsigned cd_media_bd_r; static unsigned cd_media_bd_r_srm; /* sequential recording mode */ static unsigned cd_media_bd_r_rrm; /* random recording mode */ static unsigned cd_media_bd_re; static unsigned cd_media_hddvd; static unsigned cd_media_hddvd_r; static unsigned cd_media_hddvd_r_dl; static unsigned cd_media_hddvd_ram; static unsigned cd_media_hddvd_rw; static unsigned cd_media_hddvd_rw_dl; static unsigned cd_media_mo; static unsigned cd_media_mo_se; /* sector erase */ static unsigned cd_media_mo_wo; /* write once */ static unsigned cd_media_mo_as; /* advance storage */ static unsigned cd_media_mrw; static unsigned cd_media_mrw_w; static const char *cd_media_state = NULL; static unsigned cd_media_session_next; static unsigned cd_media_session_count; static unsigned cd_media_track_count; static unsigned cd_media_track_count_data; static unsigned cd_media_track_count_audio; static unsigned long long int cd_media_session_last_offset; #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13])) #define SK(errcode) (((errcode) >> 16) & 0xF) #define ASC(errcode) (((errcode) >> 8) & 0xFF) #define ASCQ(errcode) ((errcode) & 0xFF) #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) { int err; /* disable the kernel's lock logic */ err = ioctl(fd, CDROM_CLEAR_OPTIONS, CDO_LOCK); if (err < 0) log_debug("CDROM_CLEAR_OPTIONS, CDO_LOCK failed"); err = ioctl(fd, CDROM_LOCKDOOR, lock ? 1 : 0); if (err < 0) log_debug("CDROM_LOCKDOOR failed"); return err; } 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(int fd) { int capability; capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL); if (capability < 0) return log_debug_errno(errno, "CDROM_GET_CAPABILITY failed"); if (capability & CDC_CD_R) cd_cd_r = 1; if (capability & CDC_CD_RW) cd_cd_rw = 1; if (capability & CDC_DVD) cd_dvd_rom = 1; if (capability & CDC_DVD_R) cd_dvd_r = 1; if (capability & CDC_DVD_RAM) cd_dvd_ram = 1; if (capability & CDC_MRW) cd_mrw = 1; if (capability & CDC_MRW_W) cd_mrw_w = 1; return 0; } static int cd_media_compat(int fd) { if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) != CDS_DISC_OK) return log_debug_errno(errno, "CDROM_DRIVE_STATUS != CDS_DISC_OK"); cd_media = 1; return 0; } static int cd_inquiry(int fd) { struct scsi_cmd sc; unsigned char inq[36]; int r; 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, 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 void feature_profile_media(int cur_profile) { switch (cur_profile) { case 0x01: log_debug("profile 0x%02x media_rw_nonremovable", cur_profile); cd_media = 1; cd_media_rw_nonremovable = 1; break; case 0x02: log_debug("profile 0x%02x media_rw_removable", cur_profile); cd_media = 1; cd_media_rw_removable = 1; break; case 0x03: log_debug("profile 0x%02x media_mo_se", cur_profile); cd_media = 1; cd_media_mo = 1; cd_media_mo_se = 1; break; case 0x04: log_debug("profile 0x%02x media_mo_wo", cur_profile); cd_media = 1; cd_media_mo = 1; cd_media_mo_wo = 1; break; case 0x05: log_debug("profile 0x%02x media_mo_as", cur_profile); cd_media = 1; cd_media_mo = 1; cd_media_mo_as = 1; break; case 0x08: log_debug("profile 0x%02x media_cd_rom", cur_profile); cd_media = 1; cd_media_cd_rom = 1; break; case 0x09: log_debug("profile 0x%02x media_cd_r", cur_profile); cd_media = 1; cd_media_cd_r = 1; break; case 0x0a: log_debug("profile 0x%02x media_cd_rw", cur_profile); cd_media = 1; cd_media_cd_rw = 1; break; case 0x10: log_debug("profile 0x%02x media_dvd_ro", cur_profile); cd_media = 1; cd_media_dvd_rom = 1; break; case 0x11: log_debug("profile 0x%02x media_dvd_r", cur_profile); cd_media = 1; cd_media_dvd_r = 1; break; case 0x12: log_debug("profile 0x%02x media_dvd_ram", cur_profile); cd_media = 1; cd_media_dvd_ram = 1; break; case 0x13: log_debug("profile 0x%02x media_dvd_rw_ro", cur_profile); cd_media = 1; cd_media_dvd_rw = 1; cd_media_dvd_rw_ro = 1; break; case 0x14: log_debug("profile 0x%02x media_dvd_rw_seq", cur_profile); cd_media = 1; cd_media_dvd_rw = 1; cd_media_dvd_rw_seq = 1; break; case 0x15: log_debug("profile 0x%02x media_dvd_r_dl_seq", cur_profile); cd_media = 1; cd_media_dvd_r_dl = 1; cd_media_dvd_r_dl_seq = 1; break; case 0x16: log_debug("profile 0x%02x media_dvd_r_dl_jr", cur_profile); cd_media = 1; cd_media_dvd_r_dl = 1; cd_media_dvd_r_dl_jr = 1; break; case 0x17: log_debug("profile 0x%02x media_dvd_rw_dl", cur_profile); cd_media = 1; cd_media_dvd_rw_dl = 1; break; case 0x18: log_debug("profile 0x%02x media_dvd_r_ddr", cur_profile); cd_media = 1; cd_media_dvd_r = 1; cd_media_dvd_r_ddr = 1; break; case 0x1B: log_debug("profile 0x%02x media_dvd_plus_r", cur_profile); cd_media = 1; cd_media_dvd_plus_r = 1; break; case 0x1A: log_debug("profile 0x%02x media_dvd_plus_rw", cur_profile); cd_media = 1; cd_media_dvd_plus_rw = 1; break; case 0x20: log_debug("profile 0x%02x media_ddcd_rom", cur_profile); cd_media = 1; cd_media_ddcd_rom = 1; break; case 0x21: log_debug("profile 0x%02x media_ddcd_r", cur_profile); cd_media = 1; cd_media_ddcd_r = 1; break; case 0x22: log_debug("profile 0x%02x media_ddcd_rw", cur_profile); cd_media = 1; cd_media_ddcd_rw = 1; break; case 0x2A: log_debug("profile 0x%02x media_dvd_plus_rw_dl", cur_profile); cd_media = 1; cd_media_dvd_plus_rw_dl = 1; break; case 0x2B: log_debug("profile 0x%02x media_dvd_plus_r_dl", cur_profile); cd_media = 1; cd_media_dvd_plus_r_dl = 1; break; case 0x40: log_debug("profile 0x%02x media_bd", cur_profile); cd_media = 1; cd_media_bd = 1; break; case 0x41: log_debug("profile 0x%02x media_bd_r_srm", cur_profile); cd_media = 1; cd_media_bd_r = 1; cd_media_bd_r_srm = 1; break; case 0x42: log_debug("profile 0x%02x media_bd_r_rrm", cur_profile); cd_media = 1; cd_media_bd_r = 1; cd_media_bd_r_rrm = 1; break; case 0x43: log_debug("profile 0x%02x media_bd_re", cur_profile); cd_media = 1; cd_media_bd_re = 1; break; case 0x50: log_debug("profile 0x%02x media_hddvd", cur_profile); cd_media = 1; cd_media_hddvd = 1; break; case 0x51: log_debug("profile 0x%02x media_hddvd_r", cur_profile); cd_media = 1; cd_media_hddvd_r = 1; break; case 0x52: log_debug("profile 0x%02x media_hddvd_ram", cur_profile); cd_media = 1; cd_media_hddvd_ram = 1; break; case 0x53: log_debug("profile 0x%02x media_hddvd_rw", cur_profile); cd_media = 1; cd_media_hddvd_rw = 1; break; case 0x58: log_debug("profile 0x%02x media_hddvd_r_dl", cur_profile); cd_media = 1; cd_media_hddvd_r_dl = 1; break; case 0x5A: log_debug("profile 0x%02x media_hddvd_rw_dl", cur_profile); cd_media = 1; cd_media_hddvd_rw_dl = 1; break; default: log_debug("profile 0x%02x ", cur_profile); break; } } static int feature_profiles(const unsigned char *profiles, size_t size) { unsigned i; for (i = 0; i+4 <= size; i += 4) { int profile; profile = profiles[i] << 8 | profiles[i+1]; switch (profile) { case 0x01: log_debug("profile 0x%02x rw_nonremovable", profile); cd_rw_nonremovable = 1; break; case 0x02: log_debug("profile 0x%02x rw_removable", profile); cd_rw_removable = 1; break; case 0x03: log_debug("profile 0x%02x mo_se", profile); cd_mo = 1; cd_mo_se = 1; break; case 0x04: log_debug("profile 0x%02x mo_wo", profile); cd_mo = 1; cd_mo_wo = 1; break; case 0x05: log_debug("profile 0x%02x mo_as", profile); cd_mo = 1; cd_mo_as = 1; break; case 0x08: log_debug("profile 0x%02x cd_rom", profile); cd_cd_rom = 1; break; case 0x09: log_debug("profile 0x%02x cd_r", profile); cd_cd_r = 1; break; case 0x0A: log_debug("profile 0x%02x cd_rw", profile); cd_cd_rw = 1; break; case 0x10: log_debug("profile 0x%02x dvd_rom", profile); cd_dvd_rom = 1; break; case 0x11: log_debug("profile 0x%02x dvd_r", profile); cd_dvd_r = 1; break; case 0x12: log_debug("profile 0x%02x dvd_ram", profile); cd_dvd_ram = 1; break; case 0x13: log_debug("profile 0x%02x dvd_rw_ro", profile); cd_dvd_rw = 1; cd_dvd_rw_ro = 1; break; case 0x14: log_debug("profile 0x%02x dvd_rw_seq", profile); cd_dvd_rw = 1; cd_dvd_rw_seq = 1; break; case 0x15: log_debug("profile 0x%02x dvd_r_dl_seq", profile); cd_dvd_r_dl = 1; cd_dvd_r_dl_seq = 1; break; case 0x16: log_debug("profile 0x%02x dvd_r_dl_jr", profile); cd_dvd_r_dl = 1; cd_dvd_r_dl_jr = 1; break; case 0x17: log_debug("profile 0x%02x dvd_rw_dl", profile); cd_dvd_rw_dl = 1; break; case 0x18: log_debug("profile 0x%02x dvd_r_ddr", profile); cd_dvd_r = 1; cd_dvd_r_ddr = 1; break; case 0x1B: log_debug("profile 0x%02x dvd_plus_r", profile); cd_dvd_plus_r = 1; break; case 0x1A: log_debug("profile 0x%02x dvd_plus_rw", profile); cd_dvd_plus_rw = 1; break; case 0x20: log_debug("profile 0x%02x ddcd_rom", profile); cd_ddcd_rom = 1; break; case 0x21: log_debug("profile 0x%02x ddcd_r", profile); cd_ddcd_r = 1; break; case 0x22: log_debug("profile 0x%02x media_ddcd_rw", profile); cd_ddcd_rw = 1; break; case 0x2A: log_debug("profile 0x%02x dvd_plus_rw_dl", profile); cd_dvd_plus_rw_dl = 1; break; case 0x2B: log_debug("profile 0x%02x dvd_plus_r_dl", profile); cd_dvd_plus_r_dl = 1; break; case 0x40: cd_bd = 1; log_debug("profile 0x%02x bd", profile); break; case 0x41: cd_bd_r = 1; cd_bd_r_srm = 1; log_debug("profile 0x%02x bd_r_srm", profile); break; case 0x42: cd_bd_r = 1; cd_bd_r_rrm = 1; log_debug("profile 0x%02x bd_r_rrm", profile); break; case 0x43: cd_bd_re = 1; log_debug("profile 0x%02x bd_re", profile); break; case 0x50: cd_hddvd = 1; log_debug("profile 0x%02x hddvd", profile); break; case 0x51: cd_hddvd_r = 1; log_debug("profile 0x%02x hddvd_r", profile); break; case 0x52: cd_hddvd_ram = 1; log_debug("profile 0x%02x hddvd_ram", profile); break; case 0x53: cd_hddvd_rw = 1; log_debug("profile 0x%02x hddvd_rw", profile); break; case 0x58: cd_hddvd_r_dl = 1; log_debug("profile 0x%02x hddvd_r_dl", profile); break; case 0x5A: cd_hddvd_rw_dl = 1; log_debug("profile 0x%02x hddvd_rw_dl", profile); break; default: log_debug("profile 0x%02x ", profile); break; } } return 0; } /* returns 0 if media was detected */ static int cd_profiles_old_mmc(int fd) { struct scsi_cmd sc; size_t len; int r; disc_information discinfo; 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, 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, fd, (unsigned char *)&discinfo, len, "read disc information"); } if (r < 0) { if (cd_media == 1) { log_debug("No current profile, but disc is present; assuming CD-ROM."); cd_media_cd_rom = 1; cd_media_track_count = 1; cd_media_track_count_data = 1; return 0; } else return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), "no current profile, assuming no media."); }; cd_media = 1; if (discinfo.erasable) { cd_media_cd_rw = 1; log_debug("profile 0x0a media_cd_rw"); } else if (discinfo.disc_status < 2 && cd_cd_r) { cd_media_cd_r = 1; log_debug("profile 0x09 media_cd_r"); } else { cd_media_cd_rom = 1; log_debug("profile 0x08 media_cd_rom"); } return 0; } /* returns 0 if media was detected */ static int cd_profiles(int fd) { struct scsi_cmd sc; unsigned char features[65530]; unsigned cur_profile = 0; unsigned len; unsigned i; int r, ret = -1; /* 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, 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(fd); } return log_scsi_debug_errno(r, "get configuration"); } cur_profile = features[6] << 8 | features[7]; if (cur_profile > 0) { log_debug("current profile 0x%02x", cur_profile); feature_profile_media(cur_profile); ret = 0; /* we have media */ } else log_debug("no current profile, assuming no media"); len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3]; log_debug("GET CONFIGURATION: size of features buffer 0x%04x", 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, 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 = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3]; log_debug("GET CONFIGURATION: size of features buffer 0x%04x", len); if (len > sizeof(features)) { log_debug("cannot get features in a single query, truncating"); len = sizeof(features); } /* device features */ for (i = 8; i+4 < len; i += (4 + features[i+3])) { unsigned feature; feature = features[i] << 8 | features[i+1]; switch (feature) { case 0x00: log_debug("GET CONFIGURATION: feature 'profiles', with %i entries", features[i+3] / 4); feature_profiles(&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 ret; } static int cd_media_info(int fd) { struct scsi_cmd sc; unsigned char header[32]; static const char *const media_status[] = { "blank", "appendable", "complete", "other" }; int r; 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, fd, header, sizeof(header), "read disc information"); if (r < 0) return r; cd_media = 1; log_debug("disk type %02x", header[8]); log_debug("hardware reported media status: %s", media_status[header[2] & 3]); /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */ if (!cd_media_cd_rom) cd_media_state = media_status[header[2] & 3]; /* 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 (cd_media_dvd_rw_ro && (header[2] & 3) == 1) cd_media_state = media_status[0]; /* 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 ((cd_media_dvd_rw_ro || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) { unsigned char buffer[32 * 2048]; unsigned char len; int offset; if (cd_media_dvd_ram) { /* a write protected dvd-ram may report "complete" status */ unsigned char dvdstruct[8]; unsigned char format[12]; 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, fd, dvdstruct, sizeof(dvdstruct), "read DVD structure"); if (r < 0) return r; if (dvdstruct[4] & 0x02) { cd_media_state = media_status[2]; log_debug("write-protected DVD-RAM media inserted"); goto determined; } /* 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, 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: log_debug("unformatted DVD-RAM media inserted"); /* 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 */ goto determined; case 2: log_debug("formatted DVD-RAM media inserted"); break; case 3: cd_media = 0; //return no media return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), "format capacities returned no media"); } } /* 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, fd, buffer, sizeof(buffer), "read first 32 blocks"); if (r < 0) { cd_media = 0; 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 (offset = 32768; offset < (32768 + 2048); offset++) { if (buffer [offset]) { log_debug("data in block 16, assuming complete"); goto determined; } } for (offset = 0; offset < 2048; offset++) { if (buffer [offset]) { log_debug("data in block 0, assuming complete"); goto determined; } } cd_media_state = media_status[0]; log_debug("no data in blocks 0 or 16, assuming blank"); } determined: /* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in * restricted overwrite mode can never append, only in sequential mode */ if ((header[2] & 3) < 2 && !cd_media_dvd_rw_ro) cd_media_session_next = header[10] << 8 | header[5]; cd_media_session_count = header[9] << 8 | header[4]; cd_media_track_count = header[11] << 8 | header[6]; return 0; } static int cd_media_toc(int fd) { struct scsi_cmd sc; unsigned char header[12]; unsigned char toc[65536]; unsigned len, i, num_tracks; unsigned char *p; int r; 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, fd, header, sizeof(header), "read TOC"); if (r < 0) return r; len = (header[0] << 8 | header[1]) + 2; log_debug("READ TOC: len: %d, start track: %d, end track: %d", len, header[2], header[3]); if (len > sizeof(toc)) return -1; if (len < 2) return -1; /* 2: first track, 3: last track */ num_tracks = header[3] - header[2] + 1; /* empty media has no tracks */ if (len < 8) return 0; 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, 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 (p = toc+4, i = 4; i < len-8 && num_tracks > 0; i += 8, p += 8, --num_tracks) { unsigned block; unsigned is_data_track; is_data_track = (p[1] & 0x04) != 0; block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7]; log_debug("track=%u info=0x%x(%s) start_block=%u", p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block); if (is_data_track) cd_media_track_count_data++; else cd_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, fd, header, sizeof(header), "read TOC (multi session)"); if (r < 0) return r; len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7]; log_debug("last track %u starts at block %u", header[4+2], len); cd_media_session_last_offset = (unsigned long long int)len * 2048; return 0; } static int help(void) { printf("Usage: %s [options] \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 print this help text\n" "\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' }, {} }; 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(); default: assert_not_reached("Unknown option"); } arg_node = argv[optind]; if (!arg_node) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No device is specified."); return 1; } int main(int argc, char *argv[]) { int fd = -1; int rc = 0; int r; log_set_target(LOG_TARGET_AUTO); udev_parse_config(); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) { rc = r < 0; goto exit; } for (int cnt = 0; cnt < 20; cnt++) { if (cnt != 0) (void) usleep(100 * USEC_PER_MSEC + random_u64() % (100 * USEC_PER_MSEC)); fd = open(arg_node, O_RDONLY|O_NONBLOCK|O_CLOEXEC); if (fd >= 0 || errno != EBUSY) break; } if (fd < 0) { log_debug("unable to open '%s'", arg_node); rc = 1; goto exit; } log_debug("probing: '%s'", arg_node); /* same data as original cdrom_id */ if (cd_capability_compat(fd) < 0) { rc = 1; goto exit; } /* check for media - don't bail if there's no media as we still need to * to read profiles */ cd_media_compat(fd); /* check if drive talks MMC */ if (cd_inquiry(fd) < 0) goto work; /* read drive and possibly current profile */ if (cd_profiles(fd) != 0) goto work; /* at this point we are guaranteed to have media in the drive - find out more about it */ /* get session/track info */ cd_media_toc(fd); /* get writable media state */ cd_media_info(fd); work: /* lock the media, so we enable eject button events */ if (arg_lock && cd_media) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (lock)"); media_lock(fd, true); } if (arg_unlock && cd_media) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)"); media_lock(fd, false); } if (arg_eject) { log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)"); media_lock(fd, false); log_debug("START_STOP_UNIT (eject)"); media_eject(fd); } printf("ID_CDROM=1\n"); if (cd_rw_nonremovable) printf("ID_CDROM_RW_NONREMOVABLE=1\n"); if (cd_rw_removable) printf("ID_CDROM_RW_REMOVABLE=1\n"); if (cd_cd_rom) printf("ID_CDROM_CD=1\n"); if (cd_cd_r) printf("ID_CDROM_CD_R=1\n"); if (cd_cd_rw) printf("ID_CDROM_CD_RW=1\n"); if (cd_ddcd_rom) printf("ID_CDROM_DDCD=1\n"); if (cd_ddcd_r) printf("ID_CDROM_DDCD_R=1\n"); if (cd_ddcd_rw) printf("ID_CDROM_DDCD_RW=1\n"); if (cd_dvd_rom) printf("ID_CDROM_DVD=1\n"); if (cd_dvd_r) printf("ID_CDROM_DVD_R=1\n"); if (cd_dvd_r_ddr) printf("ID_CDROM_DVD_R_DDR=1\n"); if (cd_dvd_r_dl) printf("ID_CDROM_DVD_R_DL=1\n"); if (cd_dvd_r_dl_seq) printf("ID_CDROM_DVD_R_DL_SEQ=1\n"); if (cd_dvd_r_dl_jr) printf("ID_CDROM_DVD_R_DL_JR=1\n"); if (cd_dvd_rw) printf("ID_CDROM_DVD_RW=1\n"); if (cd_dvd_rw_ro) printf("ID_CDROM_DVD_RW_RO=1\n"); if (cd_dvd_rw_seq) printf("ID_CDROM_DVD_RW_SEQ=1\n"); if (cd_dvd_rw_dl) printf("ID_CDROM_DVD_RW_DL=1\n"); if (cd_dvd_ram) printf("ID_CDROM_DVD_RAM=1\n"); if (cd_dvd_plus_r) printf("ID_CDROM_DVD_PLUS_R=1\n"); if (cd_dvd_plus_rw) printf("ID_CDROM_DVD_PLUS_RW=1\n"); if (cd_dvd_plus_r_dl) printf("ID_CDROM_DVD_PLUS_R_DL=1\n"); if (cd_dvd_plus_rw_dl) printf("ID_CDROM_DVD_PLUS_RW_DL=1\n"); if (cd_bd) printf("ID_CDROM_BD=1\n"); if (cd_bd_r) printf("ID_CDROM_BD_R=1\n"); if (cd_bd_r_srm) printf("ID_CDROM_BD_R_SRM=1\n"); if (cd_bd_r_rrm) printf("ID_CDROM_BD_R_RRM=1\n"); if (cd_bd_re) printf("ID_CDROM_BD_RE=1\n"); if (cd_hddvd) printf("ID_CDROM_HDDVD=1\n"); if (cd_hddvd_r) printf("ID_CDROM_HDDVD_R=1\n"); if (cd_hddvd_r_dl) printf("ID_CDROM_HDDVD_R_DL=1\n"); if (cd_hddvd_ram) printf("ID_CDROM_HDDVD_RAM=1\n"); if (cd_hddvd_rw) printf("ID_CDROM_HDDVD_RW=1\n"); if (cd_hddvd_rw_dl) printf("ID_CDROM_HDDVD_RW_DL=1\n"); if (cd_mo) printf("ID_CDROM_MO=1\n"); if (cd_mo_se) printf("ID_CDROM_MO_SE=1\n"); if (cd_mo_wo) printf("ID_CDROM_MO_WO=1\n"); if (cd_mo_as) printf("ID_CDROM_MO_AS=1\n"); if (cd_mrw) printf("ID_CDROM_MRW=1\n"); if (cd_mrw_w) printf("ID_CDROM_MRW_W=1\n"); if (cd_media) printf("ID_CDROM_MEDIA=1\n"); if (cd_media_rw_nonremovable) printf("ID_CDROM_MEDIA_RW_NONREMOVABLE=1\n"); if (cd_media_rw_removable) printf("ID_CDROM_MEDIA_RW_REMOVABLE=1\n"); if (cd_media_mo) printf("ID_CDROM_MEDIA_MO=1\n"); if (cd_media_mo_se) printf("ID_CDROM_MEDIA_MO_SE=1\n"); if (cd_media_mo_wo) printf("ID_CDROM_MEDIA_MO_WO=1\n"); if (cd_media_mo_as) printf("ID_CDROM_MEDIA_MO_AS=1\n"); if (cd_media_mrw) printf("ID_CDROM_MEDIA_MRW=1\n"); if (cd_media_mrw_w) printf("ID_CDROM_MEDIA_MRW_W=1\n"); if (cd_media_cd_rom) printf("ID_CDROM_MEDIA_CD=1\n"); if (cd_media_cd_r) printf("ID_CDROM_MEDIA_CD_R=1\n"); if (cd_media_cd_rw) printf("ID_CDROM_MEDIA_CD_RW=1\n"); if (cd_media_ddcd_rom) printf("ID_CDROM_MEDIA_DDCD=1\n"); if (cd_media_ddcd_r) printf("ID_CDROM_MEDIA_DDCD_R=1\n"); if (cd_media_ddcd_rw) printf("ID_CDROM_MEDIA_DDCD_RW=1\n"); if (cd_media_dvd_rom) printf("ID_CDROM_MEDIA_DVD=1\n"); if (cd_media_dvd_r) printf("ID_CDROM_MEDIA_DVD_R=1\n"); if (cd_media_dvd_r_ddr) printf("ID_CDROM_MEDIA_DVD_R_DDR=1\n"); if (cd_media_dvd_r_dl) printf("ID_CDROM_MEDIA_DVD_R_DL=1\n"); if (cd_media_dvd_r_dl_seq) printf("ID_CDROM_MEDIA_DVD_R_DL_SEQ=1\n"); if (cd_media_dvd_r_dl_jr) printf("ID_CDROM_MEDIA_DVD_R_DL_JR=1\n"); if (cd_media_dvd_ram) printf("ID_CDROM_MEDIA_DVD_RAM=1\n"); if (cd_media_dvd_rw) printf("ID_CDROM_MEDIA_DVD_RW=1\n"); if (cd_media_dvd_rw_dl) printf("ID_CDROM_MEDIA_DVD_RW_DL=1\n"); if (cd_media_dvd_plus_r) printf("ID_CDROM_MEDIA_DVD_PLUS_R=1\n"); if (cd_media_dvd_plus_rw) printf("ID_CDROM_MEDIA_DVD_PLUS_RW=1\n"); if (cd_media_dvd_plus_rw_dl) printf("ID_CDROM_MEDIA_DVD_PLUS_RW_DL=1\n"); if (cd_media_dvd_plus_r_dl) printf("ID_CDROM_MEDIA_DVD_PLUS_R_DL=1\n"); if (cd_media_bd) printf("ID_CDROM_MEDIA_BD=1\n"); if (cd_media_bd_r) printf("ID_CDROM_MEDIA_BD_R=1\n"); if (cd_media_bd_r_srm) printf("ID_CDROM_MEDIA_BD_R_SRM=1\n"); if (cd_media_bd_r_rrm) printf("ID_CDROM_MEDIA_BD_R_RRM=1\n"); if (cd_media_bd_re) printf("ID_CDROM_MEDIA_BD_RE=1\n"); if (cd_media_hddvd) printf("ID_CDROM_MEDIA_HDDVD=1\n"); if (cd_media_hddvd_r) printf("ID_CDROM_MEDIA_HDDVD_R=1\n"); if (cd_media_hddvd_r_dl) printf("ID_CDROM_MEDIA_HDDVD_R_DL=1\n"); if (cd_media_hddvd_ram) printf("ID_CDROM_MEDIA_HDDVD_RAM=1\n"); if (cd_media_hddvd_rw) printf("ID_CDROM_MEDIA_HDDVD_RW=1\n"); if (cd_media_hddvd_rw_dl) printf("ID_CDROM_MEDIA_HDDVD_RW_DL=1\n"); if (cd_media_state) printf("ID_CDROM_MEDIA_STATE=%s\n", cd_media_state); if (cd_media_session_next > 0) printf("ID_CDROM_MEDIA_SESSION_NEXT=%u\n", cd_media_session_next); if (cd_media_session_count > 0) printf("ID_CDROM_MEDIA_SESSION_COUNT=%u\n", cd_media_session_count); if (cd_media_session_count > 1 && cd_media_session_last_offset > 0) printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset); if (cd_media_track_count > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT=%u\n", cd_media_track_count); if (cd_media_track_count_audio > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%u\n", cd_media_track_count_audio); if (cd_media_track_count_data > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%u\n", cd_media_track_count_data); exit: if (fd >= 0) close(fd); log_close(); return rc; }