/* $Id: _cdio_linux.c,v 1.2 2004/04/11 12:20:31 miguelfreitas Exp $ Copyright (C) 2001 Herbert Valerio Riedel Copyright (C) 2002, 2003, 2004 Rocky Bernstein This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* This file contains Linux-specific code and implements low-level control of the CD drive. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif static const char _rcsid[] = "$Id: _cdio_linux.c,v 1.2 2004/04/11 12:20:31 miguelfreitas Exp $"; #include #include #include #include "cdio_assert.h" #include "cdio_private.h" #include "scsi_mmc.h" #ifdef HAVE_LINUX_CDROM #if defined(HAVE_LINUX_VERSION_H) # include # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,16) # define __CDIO_LINUXCD_BUILD # else # error "You need a kernel greater than 2.2.16 to have CDROM support" # endif #else # error "You need to have CDROM support" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define TOTAL_TRACKS (_obj->tochdr.cdth_trk1) #define FIRST_TRACK_NUM (_obj->tochdr.cdth_trk0) typedef struct { /* Things common to all drivers like this. This must be first. */ generic_img_private_t gen; enum { _AM_NONE, _AM_IOCTL, _AM_READ_CD, _AM_READ_10 } access_mode; /* Track information */ struct cdrom_tochdr tochdr; struct cdrom_tocentry tocent[100]; /* entry info for each track */ } _img_private_t; /* Some ioctl() errno values which occur when the tray is empty */ #define ERRNO_TRAYEMPTY(errno) \ ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) /* Check a drive to see if it is a CD-ROM Return 1 if a CD-ROM. 0 if it exists but isn't a CD-ROM drive and -1 if no device exists . */ static bool cdio_is_cdrom(char *drive, char *mnttype) { bool is_cd=false; int cdfd; struct cdrom_tochdr tochdr; /* If it doesn't exist, return -1 */ if ( !cdio_is_device_quiet_generic(drive) ) { return(false); } /* If it does exist, verify that it's an available CD-ROM */ cdfd = open(drive, (O_RDONLY|O_NONBLOCK), 0); if ( cdfd >= 0 ) { if ( ioctl(cdfd, CDROMREADTOCHDR, &tochdr) != -1 ) { is_cd = true; } close(cdfd); } /* Even if we can't read it, it might be mounted */ else if ( mnttype && (strcmp(mnttype, "iso9660") == 0) ) { is_cd = true; } return(is_cd); } static char * cdio_check_mounts(const char *mtab) { FILE *mntfp; struct mntent *mntent; mntfp = setmntent(mtab, "r"); if ( mntfp != NULL ) { char *tmp; char *mnt_type; char *mnt_dev; while ( (mntent=getmntent(mntfp)) != NULL ) { mnt_type = malloc(strlen(mntent->mnt_type) + 1); if (mnt_type == NULL) continue; /* maybe you'll get lucky next time. */ mnt_dev = malloc(strlen(mntent->mnt_fsname) + 1); if (mnt_dev == NULL) { free(mnt_type); continue; } strcpy(mnt_type, mntent->mnt_type); strcpy(mnt_dev, mntent->mnt_fsname); /* Handle "supermount" filesystem mounts */ if ( strcmp(mnt_type, "supermount") == 0 ) { tmp = strstr(mntent->mnt_opts, "fs="); if ( tmp ) { free(mnt_type); mnt_type = strdup(tmp + strlen("fs=")); if ( mnt_type ) { tmp = strchr(mnt_type, ','); if ( tmp ) { *tmp = '\0'; } } } tmp = strstr(mntent->mnt_opts, "dev="); if ( tmp ) { free(mnt_dev); mnt_dev = strdup(tmp + strlen("dev=")); if ( mnt_dev ) { tmp = strchr(mnt_dev, ','); if ( tmp ) { *tmp = '\0'; } } } } if ( strcmp(mnt_type, "iso9660") == 0 ) { if (cdio_is_cdrom(mnt_dev, mnt_type) > 0) { free(mnt_type); endmntent(mntfp); return mnt_dev; } } free(mnt_dev); free(mnt_type); } endmntent(mntfp); } return NULL; } static int _set_bsize (int fd, unsigned int bsize) { struct cdrom_generic_command cgc; struct { uint8_t reserved1; uint8_t medium; uint8_t reserved2; uint8_t block_desc_length; uint8_t density; uint8_t number_of_blocks_hi; uint8_t number_of_blocks_med; uint8_t number_of_blocks_lo; uint8_t reserved3; uint8_t block_length_hi; uint8_t block_length_med; uint8_t block_length_lo; } mh; memset (&mh, 0, sizeof (mh)); memset (&cgc, 0, sizeof (struct cdrom_generic_command)); cgc.cmd[0] = 0x15; cgc.cmd[1] = 1 << 4; cgc.cmd[4] = 12; cgc.buflen = sizeof (mh); cgc.buffer = (void *) &mh; cgc.data_direction = CGC_DATA_WRITE; mh.block_desc_length = 0x08; mh.block_length_hi = (bsize >> 16) & 0xff; mh.block_length_med = (bsize >> 8) & 0xff; mh.block_length_lo = (bsize >> 0) & 0xff; return ioctl (fd, CDROM_SEND_PACKET, &cgc); } /* Packet driver to read mode2 sectors. Can read only up to 25 blocks. */ static int _cdio_mmc_read_sectors (int fd, void *buf, lba_t lba, int sector_type, unsigned int nblocks) { typedef struct cdrom_generic_command cgc_t; cgc_t cgc; memset (&cgc, 0, sizeof (cgc_t)); cgc.cmd[0] = CDIO_MMC_GPCMD_READ_CD; CDIO_MMC_SET_READ_TYPE (cgc.cmd, sector_type); CDIO_MMC_SET_READ_LBA (cgc.cmd, lba); CDIO_MMC_SET_READ_LENGTH(cgc.cmd, nblocks); CDIO_MMC_SET_MAIN_CHANNEL_SELECTION_BITS(cgc.cmd, CDIO_MMC_MCSB_ALL_HEADERS); cgc.buflen = CDIO_CD_FRAMESIZE_RAW * nblocks; cgc.buffer = buf; #ifdef HAVE_LINUX_CDROM_TIMEOUT cgc.timeout = 500; #endif cgc.data_direction = CGC_DATA_READ; return ioctl (fd, CDROM_SEND_PACKET, &cgc); return 0; } /* MMC driver to read audio sectors. Can read only up to 25 blocks. */ static int _cdio_read_audio_sectors (void *env, void *buf, lsn_t lsn, unsigned int nblocks) { _img_private_t *_obj = env; return _cdio_mmc_read_sectors( _obj->gen.fd, buf, lsn, CDIO_MMC_READ_TYPE_CDDA, nblocks); } /* Packet driver to read mode2 sectors. Can read only up to 25 blocks. */ static int __read_packet_mode2_sectors (int fd, void *buf, lba_t lba, unsigned int nblocks, bool use_read_10) { struct cdrom_generic_command cgc; memset (&cgc, 0, sizeof (struct cdrom_generic_command)); cgc.cmd[0] = use_read_10 ? GPCMD_READ_10 : CDIO_MMC_GPCMD_READ_CD; CDIO_MMC_SET_READ_LBA(cgc.cmd, lba); CDIO_MMC_SET_READ_LENGTH(cgc.cmd, nblocks); if (!use_read_10) { cgc.cmd[1] = 0; /* sector size mode2 */ cgc.cmd[9] = 0x58; /* 2336 mode2 */ } cgc.buflen = 2336 * nblocks; cgc.buffer = buf; #ifdef HAVE_LINUX_CDROM_TIMEOUT cgc.timeout = 500; #endif cgc.data_direction = CGC_DATA_READ; if (use_read_10) { int retval; if ((retval = _set_bsize (fd, 2336))) return retval; if ((retval = ioctl (fd, CDROM_SEND_PACKET, &cgc))) { _set_bsize (fd, 2048); return retval; } if ((retval = _set_bsize (fd, 2048))) return retval; } else return ioctl (fd, CDROM_SEND_PACKET, &cgc); return 0; } static int _read_packet_mode2_sectors (int fd, void *buf, lba_t lba, unsigned int nblocks, bool use_read_10) { unsigned int l = 0; int retval = 0; while (nblocks > 0) { const unsigned nblocks2 = (nblocks > 25) ? 25 : nblocks; void *buf2 = ((char *)buf ) + (l * 2336); retval |= __read_packet_mode2_sectors (fd, buf2, lba + l, nblocks2, use_read_10); if (retval) break; nblocks -= nblocks2; l += nblocks2; } return retval; } /*! Reads a single mode1 sector from cd device into data starting from lsn. Returns 0 if no error. */ static int _cdio_read_mode1_sector (void *env, void *data, lsn_t lsn, bool b_form2) { char buf[M2RAW_SECTOR_SIZE] = { 0, }; #if FIXED struct cdrom_msf *msf = (struct cdrom_msf *) &buf; msf_t _msf; _img_private_t *_obj = env; cdio_lba_to_msf (cdio_lsn_to_lba(lsn), &_msf); msf->cdmsf_min0 = from_bcd8(_msf.m); msf->cdmsf_sec0 = from_bcd8(_msf.s); msf->cdmsf_frame0 = from_bcd8(_msf.f); retry: switch (_obj->access_mode) { case _AM_NONE: cdio_error ("no way to read mode1"); return 1; break; case _AM_IOCTL: if (ioctl (_obj->gen.fd, CDROMREADMODE1, &buf) == -1) { perror ("ioctl()"); return 1; /* exit (EXIT_FAILURE); */ } break; case _AM_READ_CD: case _AM_READ_10: if (_read_packet_mode2_sectors (_obj->gen.fd, buf, lsn, 1, (_obj->access_mode == _AM_READ_10))) { perror ("ioctl()"); if (_obj->access_mode == _AM_READ_CD) { cdio_info ("READ_CD failed; switching to READ_10 mode..."); _obj->access_mode = _AM_READ_10; goto retry; } else { cdio_info ("READ_10 failed; switching to ioctl(CDROMREADMODE2) mode..."); _obj->access_mode = _AM_IOCTL; goto retry; } return 1; } break; } memcpy (data, buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE, b_form2 ? M2RAW_SECTOR_SIZE: CDIO_CD_FRAMESIZE); #else if (0 > cdio_generic_lseek(env, CDIO_CD_FRAMESIZE*lsn, SEEK_SET)) return -1; if (0 > cdio_generic_read(env, buf, CDIO_CD_FRAMESIZE)) return -1; memcpy (data, buf, b_form2 ? M2RAW_SECTOR_SIZE: CDIO_CD_FRAMESIZE); #endif return 0; } /*! Reads nblocks of mode2 sectors from cd device into data starting from lsn. Returns 0 if no error. */ static int _cdio_read_mode1_sectors (void *env, void *data, lsn_t lsn, bool b_form2, unsigned int nblocks) { _img_private_t *_obj = env; unsigned int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _cdio_read_mode1_sector (_obj, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } /*! Reads a single mode2 sector from cd device into data starting from lsn. Returns 0 if no error. */ static int _cdio_read_mode2_sector (void *env, void *data, lsn_t lsn, bool b_form2) { char buf[M2RAW_SECTOR_SIZE] = { 0, }; struct cdrom_msf *msf = (struct cdrom_msf *) &buf; msf_t _msf; _img_private_t *_obj = env; cdio_lba_to_msf (cdio_lsn_to_lba(lsn), &_msf); msf->cdmsf_min0 = from_bcd8(_msf.m); msf->cdmsf_sec0 = from_bcd8(_msf.s); msf->cdmsf_frame0 = from_bcd8(_msf.f); retry: switch (_obj->access_mode) { case _AM_NONE: cdio_error ("no way to read mode2"); return 1; break; case _AM_IOCTL: if (ioctl (_obj->gen.fd, CDROMREADMODE2, &buf) == -1) { perror ("ioctl()"); return 1; /* exit (EXIT_FAILURE); */ } break; case _AM_READ_CD: case _AM_READ_10: if (_read_packet_mode2_sectors (_obj->gen.fd, buf, lsn, 1, (_obj->access_mode == _AM_READ_10))) { perror ("ioctl()"); if (_obj->access_mode == _AM_READ_CD) { cdio_info ("READ_CD failed; switching to READ_10 mode..."); _obj->access_mode = _AM_READ_10; goto retry; } else { cdio_info ("READ_10 failed; switching to ioctl(CDROMREADMODE2) mode..."); _obj->access_mode = _AM_IOCTL; goto retry; } return 1; } break; } if (b_form2) memcpy (data, buf, M2RAW_SECTOR_SIZE); else memcpy (((char *)data), buf + CDIO_CD_SUBHEADER_SIZE, CDIO_CD_FRAMESIZE); return 0; } /*! Reads nblocks of mode2 sectors from cd device into data starting from lsn. Returns 0 if no error. */ static int _cdio_read_mode2_sectors (void *env, void *data, lsn_t lsn, bool b_form2, unsigned int nblocks) { _img_private_t *_obj = env; unsigned int i; int retval; unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE; for (i = 0; i < nblocks; i++) { if ( (retval = _cdio_read_mode2_sector (_obj, ((char *)data) + (blocksize * i), lsn + i, b_form2)) ) return retval; } return 0; } /*! Return the size of the CD in logical block address (LBA) units. */ static uint32_t _cdio_stat_size (void *env) { _img_private_t *_obj = env; struct cdrom_tocentry tocent; uint32_t size; tocent.cdte_track = CDIO_CDROM_LEADOUT_TRACK; tocent.cdte_format = CDROM_LBA; if (ioctl (_obj->gen.fd, CDROMREADTOCENTRY, &tocent) == -1) { perror ("ioctl(CDROMREADTOCENTRY)"); exit (EXIT_FAILURE); } size = tocent.cdte_addr.lba; return size; } /*! Set the arg "key" with "value" in the source device. Currently "source" and "access-mode" are valid keys. "source" sets the source device in I/O operations "access-mode" sets the the method of CD access 0 is returned if no error was found, and nonzero if there as an error. */ static int _cdio_set_arg (void *env, const char key[], const char value[]) { _img_private_t *_obj = env; if (!strcmp (key, "source")) { if (!value) return -2; free (_obj->gen.source_name); _obj->gen.source_name = strdup (value); } else if (!strcmp (key, "access-mode")) { if (!strcmp(value, "IOCTL")) _obj->access_mode = _AM_IOCTL; else if (!strcmp(value, "READ_CD")) _obj->access_mode = _AM_READ_CD; else if (!strcmp(value, "READ_10")) _obj->access_mode = _AM_READ_10; else { cdio_warn ("unknown access type: %s. ignored.", value); } } else return -1; return 0; } /*! Read and cache the CD's Track Table of Contents and track info. Return false if successful or true if an error. */ static bool _cdio_read_toc (_img_private_t *_obj) { int i; /* read TOC header */ if ( ioctl(_obj->gen.fd, CDROMREADTOCHDR, &_obj->tochdr) == -1 ) { cdio_error("%s: %s\n", "error in ioctl CDROMREADTOCHDR", strerror(errno)); return false; } /* read individual tracks */ for (i= FIRST_TRACK_NUM; i<=TOTAL_TRACKS; i++) { _obj->tocent[i-1].cdte_track = i; _obj->tocent[i-1].cdte_format = CDROM_MSF; if ( ioctl(_obj->gen.fd, CDROMREADTOCENTRY, &_obj->tocent[i-1]) == -1 ) { cdio_error("%s %d: %s\n", "error in ioctl CDROMREADTOCENTRY for track", i, strerror(errno)); return false; } /**** struct cdrom_msf0 *msf= &_obj->tocent[i-1].cdte_addr.msf; fprintf (stdout, "--- track# %d (msf %2.2x:%2.2x:%2.2x)\n", i, msf->minute, msf->second, msf->frame); ****/ } /* read the lead-out track */ _obj->tocent[TOTAL_TRACKS].cdte_track = CDIO_CDROM_LEADOUT_TRACK; _obj->tocent[TOTAL_TRACKS].cdte_format = CDROM_MSF; if (ioctl(_obj->gen.fd, CDROMREADTOCENTRY, &_obj->tocent[TOTAL_TRACKS]) == -1 ) { cdio_error("%s: %s\n", "error in ioctl CDROMREADTOCENTRY for lead-out", strerror(errno)); return false; } /* struct cdrom_msf0 *msf= &_obj->tocent[TOTAL_TRACKS].cdte_addr.msf; fprintf (stdout, "--- track# %d (msf %2.2x:%2.2x:%2.2x)\n", i, msf->minute, msf->second, msf->frame); */ _obj->gen.toc_init = true; return true; } /* * Eject using SCSI commands. Return 1 if successful, 0 otherwise. */ static int _cdio_eject_scsi(int fd) { int status; struct sdata { int inlen; int outlen; char cmd[256]; } scsi_cmd; scsi_cmd.inlen = 0; scsi_cmd.outlen = 0; scsi_cmd.cmd[0] = ALLOW_MEDIUM_REMOVAL; scsi_cmd.cmd[1] = 0; scsi_cmd.cmd[2] = 0; scsi_cmd.cmd[3] = 0; scsi_cmd.cmd[4] = 0; scsi_cmd.cmd[5] = 0; status = ioctl(fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd); if (status != 0) return 0; scsi_cmd.inlen = 0; scsi_cmd.outlen = 0; scsi_cmd.cmd[0] = START_STOP; scsi_cmd.cmd[1] = 0; scsi_cmd.cmd[2] = 0; scsi_cmd.cmd[3] = 0; scsi_cmd.cmd[4] = 1; scsi_cmd.cmd[5] = 0; status = ioctl(fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd); if (status != 0) return 0; scsi_cmd.inlen = 0; scsi_cmd.outlen = 0; scsi_cmd.cmd[0] = START_STOP; scsi_cmd.cmd[1] = 0; scsi_cmd.cmd[2] = 0; scsi_cmd.cmd[3] = 0; scsi_cmd.cmd[4] = 2; scsi_cmd.cmd[5] = 0; status = ioctl(fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd); if (status != 0) return 0; /* force kernel to reread partition table when new disc inserted */ status = ioctl(fd, BLKRRPART); return (status == 0); } /*! Eject media in CD drive. Return 0 if success and 1 for failure, and 2 if no routine. */ static int _cdio_eject_media (void *env) { _img_private_t *_obj = env; int ret=2; int status; int fd; close(_obj->gen.fd); _obj->gen.fd = -1; if ((fd = open (_obj->gen.source_name, O_RDONLY|O_NONBLOCK)) > -1) { if((status = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT)) > 0) { switch(status) { case CDS_TRAY_OPEN: if((ret = ioctl(fd, CDROMCLOSETRAY)) != 0) { cdio_error ("ioctl CDROMCLOSETRAY failed: %s\n", strerror(errno)); ret = 1; } break; case CDS_DISC_OK: if((ret = ioctl(fd, CDROMEJECT)) != 0) { int eject_error = errno; /* Try ejecting the SCSI way... */ ret = _cdio_eject_scsi(fd); if (0 != ret) { cdio_error("ioctl CDROMEJECT failed: %s\n", strerror(eject_error)); ret = 1; } } break; default: cdio_error ("Unknown CD-ROM (%d)\n", status); ret = 1; } } else { cdio_error ("CDROM_DRIVE_STATUS failed: %s\n", strerror(errno)); ret=1; } close(fd); return ret; } return 2; } /*! Return the value associated with the key "arg". */ static const char * _cdio_get_arg (void *env, const char key[]) { _img_private_t *_obj = env; if (!strcmp (key, "source")) { return _obj->gen.source_name; } else if (!strcmp (key, "access-mode")) { switch (_obj->access_mode) { case _AM_IOCTL: return "ioctl"; case _AM_READ_CD: return "READ_CD"; case _AM_READ_10: return "READ_10"; case _AM_NONE: return "no access method"; } } return NULL; } /*! Return the number of of the first track. CDIO_INVALID_TRACK is returned on error. */ static track_t _cdio_get_first_track_num(void *env) { _img_private_t *_obj = env; if (!_obj->gen.toc_init) _cdio_read_toc (_obj) ; return FIRST_TRACK_NUM; } /*! Return the media catalog number MCN. Note: string is malloc'd so caller should free() then returned string when done with it. */ static char * _cdio_get_mcn (void *env) { struct cdrom_mcn mcn; _img_private_t *_obj = env; memset(&mcn, 0, sizeof(mcn)); if (ioctl(_obj->gen.fd, CDROM_GET_MCN, &mcn) != 0) return NULL; return strdup(mcn.medium_catalog_number); } /*! Return the number of tracks in the current medium. CDIO_INVALID_TRACK is returned on error. */ static track_t _cdio_get_num_tracks(void *env) { _img_private_t *_obj = env; if (!_obj->gen.toc_init) _cdio_read_toc (_obj) ; return TOTAL_TRACKS; } /*! Get format of track. */ static track_format_t _cdio_get_track_format(void *env, track_t track_num) { _img_private_t *_obj = env; if (!_obj->gen.toc_init) _cdio_read_toc (_obj) ; if (track_num > TOTAL_TRACKS || track_num == 0) return TRACK_FORMAT_ERROR; /* This is pretty much copied from the "badly broken" cdrom_count_tracks in linux/cdrom.c. */ if (_obj->tocent[track_num-1].cdte_ctrl & CDROM_DATA_TRACK) { if (_obj->tocent[track_num-1].cdte_format == 0x10) return TRACK_FORMAT_CDI; else if (_obj->tocent[track_num-1].cdte_format == 0x20) return TRACK_FORMAT_XA; else return TRACK_FORMAT_DATA; } else return TRACK_FORMAT_AUDIO; } /*! Return true if we have XA data (green, mode2 form1) or XA data (green, mode2 form2). That is track begins: sync - header - subheader 12 4 - 8 FIXME: there's gotta be a better design for this and get_track_format? */ static bool _cdio_get_track_green(void *env, track_t track_num) { _img_private_t *_obj = env; if (!_obj->gen.toc_init) _cdio_read_toc (_obj) ; if (track_num == CDIO_CDROM_LEADOUT_TRACK) track_num = TOTAL_TRACKS+1; if (track_num > TOTAL_TRACKS+1 || track_num == 0) return false; /* FIXME: Dunno if this is the right way, but it's what I was using in cdinfo for a while. */ return ((_obj->tocent[track_num-1].cdte_ctrl & 2) != 0); } /*! Return the starting MSF (minutes/secs/frames) for track number track_num in obj. Track numbers start at 1. The "leadout" track is specified either by using track_num LEADOUT_TRACK or the total tracks+1. False is returned if there is no track entry. */ static bool _cdio_get_track_msf(void *env, track_t track_num, msf_t *msf) { _img_private_t *_obj = env; if (NULL == msf) return false; if (!_obj->gen.toc_init) _cdio_read_toc (_obj) ; if (track_num == CDIO_CDROM_LEADOUT_TRACK) track_num = TOTAL_TRACKS+1; if (track_num > TOTAL_TRACKS+1 || track_num == 0) { return false; } else { struct cdrom_msf0 *msf0= &_obj->tocent[track_num-1].cdte_addr.msf; msf->m = to_bcd8(msf0->minute); msf->s = to_bcd8(msf0->second); msf->f = to_bcd8(msf0->frame); return true; } } /* checklist: /dev/cdrom, /dev/dvd /dev/hd?, /dev/scd? /dev/sr? */ static char checklist1[][40] = { {"cdrom"}, {"dvd"}, {""} }; static char checklist2[][40] = { {"?a hd?"}, {"?0 scd?"}, {"?0 sr?"}, {""} }; #endif /* HAVE_LINUX_CDROM */ /*! Return an array of strings giving possible CD devices. */ char ** cdio_get_devices_linux (void) { #ifndef HAVE_LINUX_CDROM return NULL; #else unsigned int i; char drive[40]; char *ret_drive; bool exists; char **drives = NULL; unsigned int num_drives=0; /* Scan the system for CD-ROM drives. */ for ( i=0; strlen(checklist1[i]) > 0; ++i ) { sprintf(drive, "/dev/%s", checklist1[i]); if ( (exists=cdio_is_cdrom(drive, NULL)) > 0 ) { cdio_add_device_list(&drives, drive, &num_drives); } } /* Now check the currently mounted CD drives */ if (NULL != (ret_drive = cdio_check_mounts("/etc/mtab"))) { cdio_add_device_list(&drives, ret_drive, &num_drives); free(ret_drive); } /* Finally check possible mountable drives in /etc/fstab */ if (NULL != (ret_drive = cdio_check_mounts("/etc/fstab"))) { cdio_add_device_list(&drives, ret_drive, &num_drives); free(ret_drive); } /* Scan the system for CD-ROM drives. Not always 100% reliable, so use the USE_MNTENT code above first. */ for ( i=0; strlen(checklist2[i]) > 0; ++i ) { unsigned int j; char *insert; exists = true; for ( j=checklist2[i][1]; exists; ++j ) { sprintf(drive, "/dev/%s", &checklist2[i][3]); insert = strchr(drive, '?'); if ( insert != NULL ) { *insert = j; } if ( (exists=cdio_is_cdrom(drive, NULL)) > 0 ) { cdio_add_device_list(&drives, drive, &num_drives); } } } cdio_add_device_list(&drives, NULL, &num_drives); return drives; #endif /*HAVE_LINUX_CDROM*/ } /*! Return a string containing the default CD device. */ char * cdio_get_default_device_linux(void) { #ifndef HAVE_LINUX_CDROM return NULL; #else unsigned int i; char drive[40]; bool exists; char *ret_drive; /* Scan the system for CD-ROM drives. */ for ( i=0; strlen(checklist1[i]) > 0; ++i ) { sprintf(drive, "/dev/%s", checklist1[i]); if ( (exists=cdio_is_cdrom(drive, NULL)) > 0 ) { return strdup(drive); } } /* Now check the currently mounted CD drives */ if (NULL != (ret_drive = cdio_check_mounts("/etc/mtab"))) return ret_drive; /* Finally check possible mountable drives in /etc/fstab */ if (NULL != (ret_drive = cdio_check_mounts("/etc/fstab"))) return ret_drive; /* Scan the system for CD-ROM drives. Not always 100% reliable, so use the USE_MNTENT code above first. */ for ( i=0; strlen(checklist2[i]) > 0; ++i ) { unsigned int j; char *insert; exists = true; for ( j=checklist2[i][1]; exists; ++j ) { sprintf(drive, "/dev/%s", &checklist2[i][3]); insert = strchr(drive, '?'); if ( insert != NULL ) { *insert = j; } if ( (exists=cdio_is_cdrom(drive, NULL)) > 0 ) { return(strdup(drive)); } } } return NULL; #endif /*HAVE_LINUX_CDROM*/ } /*! Initialization routine. This is the only thing that doesn't get called via a function pointer. In fact *we* are the ones to set that up. */ CdIo * cdio_open_linux (const char *orig_source_name) { #ifdef HAVE_LINUX_CDROM CdIo *ret; _img_private_t *_data; char *source_name; cdio_funcs _funcs = { .eject_media = _cdio_eject_media, .free = cdio_generic_free, .get_arg = _cdio_get_arg, .get_devices = cdio_get_devices_linux, .get_default_device = cdio_get_default_device_linux, .get_first_track_num= _cdio_get_first_track_num, .get_mcn = _cdio_get_mcn, .get_num_tracks = _cdio_get_num_tracks, .get_track_format = _cdio_get_track_format, .get_track_green = _cdio_get_track_green, .get_track_lba = NULL, /* This could be implemented if need be. */ .get_track_msf = _cdio_get_track_msf, .lseek = cdio_generic_lseek, .read = cdio_generic_read, .read_audio_sectors = _cdio_read_audio_sectors, .read_mode1_sector = _cdio_read_mode1_sector, .read_mode1_sectors = _cdio_read_mode1_sectors, .read_mode2_sector = _cdio_read_mode2_sector, .read_mode2_sectors = _cdio_read_mode2_sectors, .set_arg = _cdio_set_arg, .stat_size = _cdio_stat_size }; _data = _cdio_malloc (sizeof (_img_private_t)); _data->access_mode = _AM_READ_CD; _data->gen.init = false; _data->gen.fd = -1; if (NULL == orig_source_name) { source_name=cdio_get_default_device_linux(); if (NULL == source_name) return NULL; _cdio_set_arg(_data, "source", source_name); free(source_name); } else _cdio_set_arg(_data, "source", orig_source_name); ret = cdio_new (_data, &_funcs); if (ret == NULL) return NULL; if (cdio_generic_init(_data)) return ret; else { cdio_generic_free (_data); return NULL; } #else return NULL; #endif /* HAVE_LINUX_CDROM */ } bool cdio_have_linux (void) { #ifdef HAVE_LINUX_CDROM return true; #else return false; #endif /* HAVE_LINUX_CDROM */ }