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/*
*
* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "libstream.h"
#ifdef FLOPPY_SUPPORT
#include <libfloppy.h>
#endif
#ifdef SCSI_SUPPORT
#include <libscsi.h>
#endif
#ifdef BLOCK_SUPPORT
#include <libblock.h>
#endif
#ifdef CONTAINER_SUPPORT
#include <libcontainer.h>
#endif
#ifdef ISO9660_SUPPORT
#include <libiso9660.h>
#endif
typedef enum {
device_FLOPPY,
device_SCSI,
} device_t;
typedef enum {
fs_BLOCK,
fs_CONTAINER,
fs_ISO9660,
} fs_t;
static char* get_fs(char *path, fs_t *fs)
{
if (strncmp("block:", path, 6) == 0)
{
*fs = fs_BLOCK;
return path + 6;
}
if (strncmp("container:", path, 10) == 0)
{
*fs = fs_CONTAINER;
return path + 10;
}
if (strncmp("iso9660:", path, 8) == 0)
{
*fs = fs_ISO9660;
return path + 8;
}
return NULL;
}
static char *get_device(char* path,
device_t *device, int *unit, int* partition)
{
int nb;
if (*path != '(')
return NULL;
path++;
if (strncmp("fd", path, 2) == 0) {
*device = device_FLOPPY;
path += 2;
} else if (strncmp("sd", path, 2) == 0) {
*device = device_SCSI;
path += 2;
} else
return NULL;
nb = 0;
while ( (*path >= '0') && (*path <= '9') ) {
nb = (nb * 10) + (*path - '0');
path++;
}
*unit = nb;
*partition = -1;
if ( (*path == 0) || (*path == ')') )
{
path++;
return path;
}
if (*path != ',')
return NULL;
path++;
nb = 0;
while ( (*path >= '0') && (*path <= '9') ) {
nb = (nb * 10) + (*path - '0');
path++;
}
*partition = nb;
if ( (*path == 0) || (*path == ')') )
{
path++;
return path;
}
return NULL;
}
stream_t *stream_open(char *dev)
{
stream_t *stream;
fs_t fs;
device_t device;
int unit, partition;
char *current;
current = get_fs(dev, &fs);
if (current == NULL)
{
printf("Cannot identify given filesystem\n");
return NULL;
}
current = get_device(current, &device, &unit, &partition);
if (current == NULL)
{
printf("Cannot identify given device\n");
return NULL;
}
stream = (stream_t*)malloc(sizeof(stream_t));
switch(device)
{
#ifdef FLOPPY_SUPPORT
case device_FLOPPY:
if (partition != -1)
{
free(stream);
return NULL;
}
stream->device.data = floppy_open(unit);
if (stream->device.data == NULL)
{
free(stream);
return NULL;
}
stream->device.read_sector =
(stream_read_sector_t)floppy_read_sector;
stream->device.close = (stream_close_t)floppy_close;
stream->device.get_blocksize =
(stream_get_blocksize_t)floppy_get_blocksize;
break;
#endif /* FLOPPY_SUPPORT */
#ifdef SCSI_SUPPORT
case device_SCSI:
stream->device.data = scsi_open(unit);
if (stream->device.data == NULL)
{
free(stream);
return NULL;
}
stream->device.read_sector =
(stream_read_sector_t)scsi_read_sector;
stream->device.close = (stream_close_t)scsi_close;
stream->device.get_blocksize =
(stream_get_blocksize_t)scsi_get_blocksize;
break;
#endif /* SCSI_SUPPORT */
default:
free(stream);
return NULL;
break;
}
switch(fs)
{
#ifdef BLOCK_SUPPORT
case fs_BLOCK:
stream->fs.volume = NULL;
stream->fs.file = block_open(&stream->device, current);
if (stream->fs.file == NULL)
goto outfs;
stream->fs.read = (stream_read_t)block_read;
stream->fs.lseek = (stream_lseek_t)block_lseek;
stream->fs.close = (stream_close_t)block_close;
stream->fs.umount = NULL;
stream->fs.fstat = (stream_fstat_t)block_fstat;
break;
#endif /* BLOCK_SUPPORT */
#ifdef CONTAINER_SUPPORT
case fs_CONTAINER:
stream->fs.volume = NULL;
stream->fs.file = container_open(&stream->device, current);
if (stream->fs.file == NULL)
goto outfs;
stream->fs.read = (stream_read_t)container_read;
stream->fs.lseek = (stream_lseek_t)container_lseek;
stream->fs.close = (stream_close_t)container_close;
stream->fs.umount = NULL;
stream->fs.fstat = (stream_fstat_t)container_fstat;
break;
#endif /* CONTAINER_SUPPORT */
#ifdef ISO9660_SUPPORT
case fs_ISO9660:
stream->fs.volume = iso9660_mount(&stream->device);
if (stream->fs.volume == NULL)
{
printf("Cannot mount volume ISO9660\n");
goto outfs;
}
stream->fs.file = iso9660_open(stream->fs.volume, current);
if (stream->fs.file == NULL)
{
iso9660_umount(stream->fs.volume);
goto outfs;
}
stream->fs.read = (stream_read_t)iso9660_read;
stream->fs.lseek = (stream_lseek_t)iso9660_lseek;
stream->fs.close = (stream_close_t)iso9660_close;
stream->fs.umount = (stream_umount_t)iso9660_umount;
stream->fs.fstat = (stream_fstat_t)iso9660_fstat;
break;
#endif /* ISO9660_SUPPORT */
default:
outfs:
stream->device.close(stream->device.data);
free(stream);
return NULL;
}
return stream;
}
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