X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=extras%2Fcdrom_id%2Fcdrom_id.c;h=1b43fe43ae8decf378d7969a96bac5c470f61172;hp=37212e9794f79424fa59f4012d76ec983c58260d;hb=1ebd2a5620c93ef4698485d392c19ded675412d2;hpb=58e178894bfc040834e1270c6fe9b9fdef513550 diff --git a/extras/cdrom_id/cdrom_id.c b/extras/cdrom_id/cdrom_id.c index 37212e979..1b43fe43a 100644 --- a/extras/cdrom_id/cdrom_id.c +++ b/extras/cdrom_id/cdrom_id.c @@ -85,6 +85,8 @@ static unsigned int cd_media_cd_rw = 0; static unsigned int cd_media_dvd_rom = 0; static unsigned int cd_media_dvd_r = 0; static unsigned int cd_media_dvd_rw = 0; +static unsigned int cd_media_dvd_rw_ro = 0; /* restricted overwrite mode */ +static unsigned int cd_media_dvd_rw_seq = 0; /* sequential mode */ static unsigned int cd_media_dvd_ram = 0; static unsigned int cd_media_dvd_plus_r = 0; static unsigned int cd_media_dvd_plus_rw = 0; @@ -274,6 +276,18 @@ static int feature_profiles(struct udev *udev, const unsigned char *profiles, si info(udev, "profile 0x%02x mo\n", profile); cd_mo = 1; break; + case 0x08: + info(udev, "profile 0x%02x cd_rom\n", profile); + cd_cd_rom = 1; + break; + case 0x09: + info(udev, "profile 0x%02x cd_r\n", profile); + cd_cd_r = 1; + break; + case 0x0A: + info(udev, "profile 0x%02x cd_rw\n", profile); + cd_cd_rw = 1; + break; case 0x10: info(udev, "profile 0x%02x dvd_rom\n", profile); cd_dvd_rom = 1; @@ -336,6 +350,45 @@ static int feature_profiles(struct udev *udev, const unsigned char *profiles, si return 0; } +static int cd_profiles_old_mmc(struct udev *udev, int fd) +{ + struct scsi_cmd sc; + int err; + + unsigned char header[32]; + + scsi_cmd_init(udev, &sc, header, sizeof(header)); + scsi_cmd_set(udev, &sc, 0, 0x51); + scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DISC INFORMATION", err); + if (cd_media == 1) { + info(udev, "no current profile, but disc is present; assuming CD-ROM\n"); + cd_media_cd_rom = 1; + return 0; + } else { + info(udev, "no current profile, assuming no media\n"); + return -1; + } + }; + + cd_media = 1; + + if (header[2] & 16) { + cd_media_cd_rw = 1; + info(udev, "profile 0x0a media_cd_rw\n"); + } else if ((header[2] & 3) < 2 && cd_cd_r) { + cd_media_cd_r = 1; + info(udev, "profile 0x09 media_cd_r\n"); + } else { + cd_media_cd_rom = 1; + info(udev, "profile 0x08 media_cd_rom\n"); + } + return 0; +} + static int cd_profiles(struct udev *udev, int fd) { struct scsi_cmd sc; @@ -353,6 +406,12 @@ static int cd_profiles(struct udev *udev, int fd) err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features)); if ((err != 0)) { info_scsi_cmd_err(udev, "GET CONFIGURATION", err); + /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ + if (SK(err) == 0x5 && ASC(err) == 0x20) { + info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n"); + info(udev, "trying to work around the problem\n"); + return cd_profiles_old_mmc(udev, fd); + } return -1; } @@ -389,83 +448,105 @@ static int cd_profiles(struct udev *udev, int fd) return -1; } - cd_media = 1; - switch (cur_profile) { case 0x03: case 0x04: case 0x05: info(udev, "profile 0x%02x \n", cur_profile); + cd_media = 1; cd_media_mo = 1; break; case 0x08: info(udev, "profile 0x%02x media_cd_rom\n", cur_profile); + cd_media = 1; cd_media_cd_rom = 1; break; case 0x09: info(udev, "profile 0x%02x media_cd_r\n", cur_profile); + cd_media = 1; cd_media_cd_r = 1; break; case 0x0a: info(udev, "profile 0x%02x media_cd_rw\n", cur_profile); + cd_media = 1; cd_media_cd_rw = 1; break; case 0x10: info(udev, "profile 0x%02x media_dvd_ro\n", cur_profile); + cd_media = 1; cd_media_dvd_rom = 1; break; case 0x11: info(udev, "profile 0x%02x media_dvd_r\n", cur_profile); + cd_media = 1; cd_media_dvd_r = 1; break; case 0x12: info(udev, "profile 0x%02x media_dvd_ram\n", cur_profile); + cd_media = 1; cd_media_dvd_ram = 1; break; case 0x13: + info(udev, "profile 0x%02x media_dvd_rw_ro\n", cur_profile); + cd_media = 1; + cd_media_dvd_rw = 1; + cd_media_dvd_rw_ro = 1; + break; case 0x14: - info(udev, "profile 0x%02x media_dvd_rw\n", cur_profile); + info(udev, "profile 0x%02x media_dvd_rw_seq\n", cur_profile); + cd_media = 1; cd_media_dvd_rw = 1; + cd_media_dvd_rw_seq = 1; break; case 0x1B: info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_r = 1; break; case 0x1A: info(udev, "profile 0x%02x media_dvd_plus_rw\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_rw = 1; break; case 0x2A: info(udev, "profile 0x%02x media_dvd_plus_rw_dl\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_rw_dl = 1; break; case 0x2B: info(udev, "profile 0x%02x media_dvd_plus_r_dl\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_r_dl = 1; break; case 0x40: info(udev, "profile 0x%02x media_bd\n", cur_profile); + cd_media = 1; cd_media_bd = 1; break; case 0x41: case 0x42: info(udev, "profile 0x%02x media_bd_r\n", cur_profile); + cd_media = 1; cd_media_bd_r = 1; break; case 0x43: info(udev, "profile 0x%02x media_bd_re\n", cur_profile); + cd_media = 1; cd_media_bd_re = 1; break; case 0x50: info(udev, "profile 0x%02x media_hddvd\n", cur_profile); + cd_media = 1; cd_media_hddvd = 1; break; case 0x51: info(udev, "profile 0x%02x media_hddvd_r\n", cur_profile); + cd_media = 1; cd_media_hddvd_r = 1; break; case 0x52: info(udev, "profile 0x%02x media_hddvd_rw\n", cur_profile); + cd_media = 1; cd_media_hddvd_rw = 1; break; default: @@ -489,7 +570,7 @@ static int cd_media_info(struct udev *udev, int fd) scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x51); - scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); if ((err != 0)) { @@ -497,13 +578,128 @@ static int cd_media_info(struct udev *udev, int fd) return -1; }; + cd_media = 1; info(udev, "disk type %02x\n", header[8]); + info(udev, "hardware reported media status: %s\n", media_status[header[2] & 3]); /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */ - if (!cd_media_cd_rom && (header[2] & 3) < 4) + if (!cd_media_cd_rom) cd_media_state = media_status[header[2] & 3]; - if ((header[2] & 3) != 2) + /* fresh DVD-RW in restricted overwite 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 result, len; + int block, 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(udev, &sc, dvdstruct, sizeof(dvdstruct)); + scsi_cmd_set(udev, &sc, 0, 0xAD); + scsi_cmd_set(udev, &sc, 7, 0xC0); + scsi_cmd_set(udev, &sc, 9, sizeof(dvdstruct)); + scsi_cmd_set(udev, &sc, 11, 0); + err = scsi_cmd_run(udev, &sc, fd, dvdstruct, sizeof(dvdstruct)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DVD STRUCTURE", err); + return -1; + } + if (dvdstruct[4] & 0x02) { + cd_media_state = media_status[2]; + info(udev, "write-protected DVD-RAM media inserted\n"); + goto determined; + } + + /* let's make sure we don't try to read unformatted media */ + scsi_cmd_init(udev, &sc, format, sizeof(format)); + scsi_cmd_set(udev, &sc, 0, 0x23); + scsi_cmd_set(udev, &sc, 8, sizeof(format)); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, format, sizeof(format)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DVD FORMAT CAPACITIES", err); + return -1; + } + + len = format[3]; + if (len & 7 || len < 16) { + info(udev, "invalid format capacities length\n"); + return -1; + } + + switch(format[8] & 3) { + case 1: + info(udev, "unformatted DVD-RAM media inserted\n"); + /* 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: + info(udev, "formatted DVD-RAM media inserted\n"); + break; + + case 3: + cd_media = 0; //return no media + info(udev, "format capacities returned no media\n"); + return -1; + } + } + + /* 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(udev, &sc, buffer, sizeof(buffer)); + scsi_cmd_set(udev, &sc, 0, 0x28); + scsi_cmd_set(udev, &sc, 5, 0); + scsi_cmd_set(udev, &sc, 8, 32); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "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 */ + result = 0; + + for (block = 32768; block >= 0 && !result; block -= 32768) { + offset = block; + while (offset < (block + 2048) && !result) { + result = buffer [offset]; + offset++; + } + } + + if (!result) { + cd_media_state = media_status[0]; + info(udev, "no data in blocks 0 or 16, assuming blank\n"); + } else { + info(udev, "data in blocks 0 or 16, assuming complete\n"); + } + } + +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]; @@ -516,14 +712,14 @@ static int cd_media_toc(struct udev *udev, int fd) struct scsi_cmd sc; unsigned char header[12]; unsigned char toc[2048]; - unsigned int len, i; + unsigned int len, i, num_tracks; unsigned char *p; int err; scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 6, 1); - scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); if ((err != 0)) { @@ -532,11 +728,13 @@ static int cd_media_toc(struct udev *udev, int fd) } len = (header[0] << 8 | header[1]) + 2; - info(udev, "READ TOC: len: %d\n", len); + info(udev, "READ TOC: len: %d, start track: %d, end track: %d\n", 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) @@ -545,8 +743,8 @@ static int cd_media_toc(struct udev *udev, int fd) scsi_cmd_init(udev, &sc, toc, sizeof(toc)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */ - scsi_cmd_set(udev, &sc, 7, len >> 8); - scsi_cmd_set(udev, &sc, 8, len); + scsi_cmd_set(udev, &sc, 7, (len >> 8) & 0xff); + scsi_cmd_set(udev, &sc, 8, len & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, toc, len); if ((err != 0)) { @@ -554,7 +752,10 @@ static int cd_media_toc(struct udev *udev, int fd) return -1; } - for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) { + /* 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 int block; unsigned int is_data_track; @@ -573,7 +774,7 @@ static int cd_media_toc(struct udev *udev, int fd) scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */ - scsi_cmd_set(udev, &sc, 8, 12); + scsi_cmd_set(udev, &sc, 8, sizeof(header)); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); if ((err != 0)) { @@ -682,12 +883,10 @@ int main(int argc, char *argv[]) goto print; /* get session/track info */ - if (cd_media_toc(udev, fd) < 0) - goto print; + cd_media_toc(udev, fd); /* get writable media state */ - if (cd_media_info(udev, fd) < 0) - goto print; + cd_media_info(udev, fd); print: printf("ID_CDROM=1\n"); @@ -781,14 +980,14 @@ print: printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next); if (cd_media_session_count > 0) printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\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=%d\n", cd_media_track_count); if (cd_media_track_count_audio > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio); if (cd_media_track_count_data > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data); - if (cd_media_session_last_offset > 0) - printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset); exit: if (fd >= 0) close(fd);