diff options
Diffstat (limited to 'src/input/vcd/libcdio/_cdio_generic.c')
| -rw-r--r-- | src/input/vcd/libcdio/_cdio_generic.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/input/vcd/libcdio/_cdio_generic.c b/src/input/vcd/libcdio/_cdio_generic.c new file mode 100644 index 000000000..180de1086 --- /dev/null +++ b/src/input/vcd/libcdio/_cdio_generic.c @@ -0,0 +1,195 @@ +/* + $Id: _cdio_generic.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_generic.c,v 1.1 2003/10/13 11:47:11 f1rmb Exp $"; + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <fcntl.h> + +#include <sys/stat.h> +#include <sys/types.h> + +#include <cdio/sector.h> +#include <cdio/util.h> +#include "cdio_assert.h" +#include "cdio_private.h" +#include "_cdio_stdio.h" + +/*! + Eject media -- there's nothing to do here. We always return 2. + Should we also free resources? + */ +int +cdio_generic_bogus_eject_media (void *user_data) { + /* Sort of a stub here. Perhaps log a message? */ + return 2; +} + + +/*! + Release and free resources associated with cd. + */ +void +cdio_generic_free (void *user_data) +{ + generic_img_private_t *_obj = user_data; + + if (NULL == _obj) return; + free (_obj->source_name); + + if (_obj->fd >= 0) + close (_obj->fd); + + free (_obj); +} + +/*! + Initialize CD device. + */ +bool +cdio_generic_init (void *user_data) +{ + generic_img_private_t *_obj = user_data; + if (_obj->init) { + cdio_error ("init called more than once"); + return false; + } + + _obj->fd = open (_obj->source_name, O_RDONLY, 0); + + if (_obj->fd < 0) + { + cdio_warn ("open (%s): %s", _obj->source_name, strerror (errno)); + return false; + } + + _obj->init = true; + _obj->toc_init = false; + return true; +} + +/*! + Reads into buf the next size bytes. + Returns -1 on error. + Is in fact libc's read(). +*/ +off_t +cdio_generic_lseek (void *user_data, off_t offset, int whence) +{ + generic_img_private_t *_obj = user_data; + return lseek(_obj->fd, offset, whence); +} + +/*! + Reads into buf the next size bytes. + Returns -1 on error. + Is in fact libc's read(). +*/ +ssize_t +cdio_generic_read (void *user_data, void *buf, size_t size) +{ + generic_img_private_t *_obj = user_data; + return read(_obj->fd, buf, size); +} + +/*! + Release and free resources associated with stream or disk image. +*/ +void +cdio_generic_stream_free (void *user_data) +{ + generic_img_private_t *_obj = user_data; + + if (NULL == _obj) return; + free (_obj->source_name); + + if (_obj->data_source) + cdio_stream_destroy (_obj->data_source); + + free (_obj); +} + + +/*! + Return true if source_name could be a device containing a CD-ROM. +*/ +bool +cdio_is_device_generic(const char *source_name) +{ + struct stat buf; + if (0 != stat(source_name, &buf)) { + cdio_warn ("Can't get file status for %s:\n%s", source_name, + strerror(errno)); + return false; + } + return (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode)); +} + +/*! + Like above, but don't give a warning device doesn't exist. +*/ +bool +cdio_is_device_quiet_generic(const char *source_name) +{ + struct stat buf; + if (0 != stat(source_name, &buf)) { + return false; + } + return (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode)); +} + +/*! + Add/allocate a drive to the end of drives. + Use cdio_free_device_list() to free this device_list. +*/ +void +cdio_add_device_list(char **device_list[], const char *drive, int *num_drives) +{ + if (NULL != drive) { + unsigned int j; + for (j=0; j<*num_drives; j++) { + if (strcmp((*device_list)[j], drive) == 0) break; + } + if (j==*num_drives) { + (*num_drives)++; + *device_list = realloc(*device_list, (*num_drives) * sizeof(char *)); + (*device_list)[*num_drives-1] = strdup(drive); + } + } else { + (*num_drives)++; + *device_list = realloc(*device_list, (*num_drives) * sizeof(char *)); + (*device_list)[*num_drives-1] = NULL; + } +} + + |