| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * cdrom_id - optical drive and media information prober |
| */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <limits.h> |
| #include <linux/cdrom.h> |
| #include <scsi/sg.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include "log.h" |
| #include "memory-util.h" |
| #include "random-util.h" |
| #include "udev-util.h" |
| |
| /* device info */ |
| static unsigned cd_cd_rom; |
| static unsigned cd_cd_r; |
| static unsigned cd_cd_rw; |
| static unsigned cd_dvd_rom; |
| static unsigned cd_dvd_r; |
| static unsigned cd_dvd_rw; |
| 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_re; |
| static unsigned cd_hddvd; |
| static unsigned cd_hddvd_r; |
| static unsigned cd_hddvd_rw; |
| static unsigned cd_mo; |
| static unsigned cd_mrw; |
| static unsigned cd_mrw_w; |
| |
| /* media info */ |
| static unsigned cd_media; |
| static unsigned cd_media_cd_rom; |
| static unsigned cd_media_cd_r; |
| static unsigned cd_media_cd_rw; |
| static unsigned cd_media_dvd_rom; |
| static unsigned cd_media_dvd_r; |
| 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_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_re; |
| static unsigned cd_media_hddvd; |
| static unsigned cd_media_hddvd_r; |
| static unsigned cd_media_hddvd_rw; |
| static unsigned cd_media_mo; |
| 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) |
| |
| static void info_scsi_cmd_err(const char *cmd, int err) { |
| if (err == -1) |
| log_debug("%s failed", cmd); |
| else |
| log_debug("%s failed with SK=%Xh/ASC=%02Xh/ACQ=%02Xh", cmd, SK(err), ASC(err), ASCQ(err)); |
| } |
| |
| 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; |
| } |
| |
| #define CHECK_CONDITION 0x01 |
| |
| static int scsi_cmd_run(struct scsi_cmd *cmd, int fd, unsigned char *buf, size_t bufsize) { |
| int ret = 0; |
| |
| 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)) |
| return -1; |
| |
| if ((cmd->sg_io.info & SG_INFO_OK_MASK) != SG_INFO_OK) { |
| errno = EIO; |
| ret = -1; |
| if (cmd->sg_io.masked_status & CHECK_CONDITION) { |
| ret = ERRCODE(cmd->_sense.u); |
| if (ret == 0) |
| ret = -1; |
| } |
| } |
| return ret; |
| } |
| |
| 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; |
| int err; |
| |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x1b); |
| scsi_cmd_set(&sc, 4, 0x02); |
| scsi_cmd_set(&sc, 5, 0); |
| err = scsi_cmd_run(&sc, fd, NULL, 0); |
| if (err != 0) { |
| info_scsi_cmd_err("START_STOP_UNIT", err); |
| return -1; |
| } |
| return 0; |
| } |
| |
| 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[128]; |
| int err; |
| |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x12); |
| scsi_cmd_set(&sc, 4, 36); |
| scsi_cmd_set(&sc, 5, 0); |
| err = scsi_cmd_run(&sc, fd, inq, 36); |
| if (err != 0) { |
| info_scsi_cmd_err("INQUIRY", err); |
| return -1; |
| } |
| |
| 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 0x03: |
| case 0x04: |
| case 0x05: |
| log_debug("profile 0x%02x ", cur_profile); |
| cd_media = 1; |
| cd_media_mo = 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 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 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: |
| case 0x42: |
| log_debug("profile 0x%02x media_bd_r", cur_profile); |
| cd_media = 1; |
| cd_media_bd_r = 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_rw", cur_profile); |
| cd_media = 1; |
| cd_media_hddvd_rw = 1; |
| break; |
| default: |
| log_debug("profile 0x%02x <ignored>", 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 0x03: |
| case 0x04: |
| case 0x05: |
| log_debug("profile 0x%02x mo", profile); |
| cd_mo = 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 0x12: |
| log_debug("profile 0x%02x dvd_ram", profile); |
| cd_dvd_ram = 1; |
| break; |
| case 0x13: |
| case 0x14: |
| log_debug("profile 0x%02x dvd_rw", profile); |
| cd_dvd_rw = 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 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: |
| case 0x42: |
| cd_bd_r = 1; |
| log_debug("profile 0x%02x bd_r", 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_rw = 1; |
| log_debug("profile 0x%02x hddvd_rw", profile); |
| break; |
| default: |
| log_debug("profile 0x%02x <ignored>", profile); |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| /* returns 0 if media was detected */ |
| static int cd_profiles_old_mmc(int fd) { |
| struct scsi_cmd sc; |
| int err; |
| |
| unsigned char header[32]; |
| |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x51); |
| scsi_cmd_set(&sc, 8, sizeof(header)); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, header, sizeof(header)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ DISC INFORMATION", err); |
| 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 (header[2] & 16) { |
| cd_media_cd_rw = 1; |
| log_debug("profile 0x0a media_cd_rw"); |
| } else if ((header[2] & 3) < 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 err; |
| int ret; |
| |
| ret = -1; |
| |
| /* First query the current profile */ |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x46); |
| scsi_cmd_set(&sc, 8, 8); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, features, 8); |
| if (err != 0) { |
| info_scsi_cmd_err("GET CONFIGURATION", err); |
| /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ |
| if (SK(err) == 0x5 && IN_SET(ASC(err), 0x20, 0x24)) { |
| log_debug("drive is pre-MMC2 and does not support 46h get configuration command"); |
| log_debug("trying to work around the problem"); |
| ret = cd_profiles_old_mmc(fd); |
| } |
| goto out; |
| } |
| |
| 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, 0x46); |
| scsi_cmd_set(&sc, 7, ( len >> 8 ) & 0xff); |
| scsi_cmd_set(&sc, 8, len & 0xff); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, features, len); |
| if (err != 0) { |
| info_scsi_cmd_err("GET CONFIGURATION", err); |
| return -1; |
| } |
| |
| /* 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 <ignored>, with 0x%02x bytes", feature, features[i+3]); |
| break; |
| } |
| } |
| out: |
| 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 err; |
| |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x51); |
| scsi_cmd_set(&sc, 8, sizeof(header) & 0xff); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, header, sizeof(header)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ DISC INFORMATION", err); |
| return -1; |
| }; |
| |
| 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, 0xAD); |
| scsi_cmd_set(&sc, 7, 0xC0); |
| scsi_cmd_set(&sc, 9, sizeof(dvdstruct)); |
| scsi_cmd_set(&sc, 11, 0); |
| err = scsi_cmd_run(&sc, fd, dvdstruct, sizeof(dvdstruct)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ DVD STRUCTURE", err); |
| return -1; |
| } |
| 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, 0x23); |
| scsi_cmd_set(&sc, 8, sizeof(format)); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, format, sizeof(format)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ DVD FORMAT CAPACITIES", err); |
| return -1; |
| } |
| |
| 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, 0x28); |
| scsi_cmd_set(&sc, 5, 0); |
| scsi_cmd_set(&sc, 8, 32); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, buffer, sizeof(buffer)); |
| if (err != 0) { |
| cd_media = 0; |
| info_scsi_cmd_err("READ FIRST 32 BLOCKS", err); |
| return -1; |
| } |
| |
| /* 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 err; |
| |
| scsi_cmd_init(&sc); |
| scsi_cmd_set(&sc, 0, 0x43); |
| scsi_cmd_set(&sc, 6, 1); |
| scsi_cmd_set(&sc, 8, sizeof(header) & 0xff); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, header, sizeof(header)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ TOC", err); |
| return -1; |
| } |
| |
| 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, 0x43); |
| 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); |
| err = scsi_cmd_run(&sc, fd, toc, len); |
| if (err != 0) { |
| info_scsi_cmd_err("READ TOC (tracks)", err); |
| return -1; |
| } |
| |
| /* 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, 0x43); |
| scsi_cmd_set(&sc, 2, 1); /* Session Info */ |
| scsi_cmd_set(&sc, 8, sizeof(header)); |
| scsi_cmd_set(&sc, 9, 0); |
| err = scsi_cmd_run(&sc, fd, header, sizeof(header)); |
| if (err != 0) { |
| info_scsi_cmd_err("READ TOC (multi session)", err); |
| return -1; |
| } |
| 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; |
| } |
| |
| int main(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' }, |
| {} |
| }; |
| bool eject = false; |
| bool lock = false; |
| bool unlock = false; |
| const char *node = NULL; |
| int fd = -1; |
| int cnt; |
| int rc = 0; |
| |
| log_set_target(LOG_TARGET_AUTO); |
| udev_parse_config(); |
| log_parse_environment(); |
| log_open(); |
| |
| for (;;) { |
| int option; |
| |
| option = getopt_long(argc, argv, "deluh", options, NULL); |
| if (option == -1) |
| break; |
| |
| switch (option) { |
| case 'l': |
| lock = true; |
| break; |
| case 'u': |
| unlock = true; |
| break; |
| case 'e': |
| eject = true; |
| break; |
| case 'd': |
| log_set_target(LOG_TARGET_CONSOLE); |
| log_set_max_level(LOG_DEBUG); |
| log_open(); |
| break; |
| case 'h': |
| printf("Usage: %s [options] <device>\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 debug to stderr\n" |
| " -h,--help print this help text\n\n", |
| program_invocation_short_name); |
| goto exit; |
| default: |
| rc = 1; |
| goto exit; |
| } |
| } |
| |
| node = argv[optind]; |
| if (!node) { |
| log_error("no device"); |
| rc = 1; |
| goto exit; |
| } |
| |
| initialize_srand(); |
| for (cnt = 20; cnt > 0; cnt--) { |
| struct timespec duration; |
| |
| fd = open(node, O_RDONLY|O_NONBLOCK|O_CLOEXEC); |
| if (fd >= 0 || errno != EBUSY) |
| break; |
| duration.tv_sec = 0; |
| duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000); |
| nanosleep(&duration, NULL); |
| } |
| if (fd < 0) { |
| log_debug("unable to open '%s'", node); |
| rc = 1; |
| goto exit; |
| } |
| log_debug("probing: '%s'", 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 (lock && cd_media) { |
| log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (lock)"); |
| media_lock(fd, true); |
| } |
| |
| if (unlock && cd_media) { |
| log_debug("PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)"); |
| media_lock(fd, false); |
| } |
| |
| if (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_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_dvd_rom) |
| printf("ID_CDROM_DVD=1\n"); |
| if (cd_dvd_r) |
| printf("ID_CDROM_DVD_R=1\n"); |
| if (cd_dvd_rw) |
| printf("ID_CDROM_DVD_RW=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_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_rw) |
| printf("ID_CDROM_HDDVD_RW=1\n"); |
| if (cd_mo) |
| printf("ID_CDROM_MO=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_mo) |
| printf("ID_CDROM_MEDIA_MO=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_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_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_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_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_rw) |
| printf("ID_CDROM_MEDIA_HDDVD_RW=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; |
| } |