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-rw-r--r--src/input/vcd/libcdio/_cdio_linux.c1028
1 files changed, 1028 insertions, 0 deletions
diff --git a/src/input/vcd/libcdio/_cdio_linux.c b/src/input/vcd/libcdio/_cdio_linux.c
new file mode 100644
index 000000000..51afb728e
--- /dev/null
+++ b/src/input/vcd/libcdio/_cdio_linux.c
@@ -0,0 +1,1028 @@
+/*
+ $Id: _cdio_linux.c,v 1.1 2003/10/13 11:47:11 f1rmb Exp $
+
+ Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
+ Copyright (C) 2002,2003 Rocky Bernstein <rocky@panix.com>
+
+ 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 1.1 2003/10/13 11:47:11 f1rmb Exp $";
+
+#include <string.h>
+
+#include <cdio/sector.h>
+#include <cdio/util.h>
+#include "cdio_assert.h"
+#include "cdio_private.h"
+#include "scsi_mmc.h"
+
+#ifdef HAVE_LINUX_CDROM
+
+#if defined(HAVE_LINUX_VERSION_H)
+# include <linux/version.h>
+# 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 <linux/version.h> to have CDROM support"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <mntent.h>
+
+#include <linux/cdrom.h>
+#include <scsi/scsi.h>
+#include <scsi/sg.h>
+#include <scsi/scsi_ioctl.h>
+#include <sys/mount.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#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_EXCL|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_dev);
+ free(mnt_type);
+ endmntent(mntfp);
+ return strdup(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 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 mode2_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 (mode2_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 mode2_form2, unsigned int nblocks)
+{
+ _img_private_t *_obj = env;
+ unsigned int i;
+ int retval;
+
+ for (i = 0; i < nblocks; i++) {
+ if (mode2_form2) {
+ if ( (retval = _cdio_read_mode2_sector (_obj,
+ ((char *)data)
+ + (M2RAW_SECTOR_SIZE * i),
+ lsn + i, true)) )
+ return retval;
+ } else {
+ char buf[M2RAW_SECTOR_SIZE] = { 0, };
+ if ( (retval = _cdio_read_mode2_sector (_obj, buf, lsn + i, true)) )
+ return retval;
+
+ memcpy (((char *)data) + (CDIO_CD_FRAMESIZE * i),
+ buf + CDIO_CD_SUBHEADER_SIZE, CDIO_CD_FRAMESIZE);
+ }
+ }
+ 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;
+ 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, drive, &num_drives);
+ }
+
+ /* Finally check possible mountable drives in /etc/fstab */
+ if (NULL != (ret_drive = cdio_check_mounts("/etc/fstab"))) {
+ cdio_add_device_list(&drives, drive, &num_drives);
+ }
+
+ /* 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_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 */
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-28 20:39:31 +0000