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/*
* ntfs_io.c - Unix style disk io functions. Part of the TestDisk project.
*
* Original version comes from the Linux-NTFS project.
* Copyright (c) 2000-2003 Anton Altaparmakov
* Copyright (c) 2004-2006 Christophe Grenier
*
* This program/include file 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/include file 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 (in the main directory of the Linux-NTFS
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#if defined(DISABLED_FOR_FRAMAC)
#undef HAVE_LIBNTFS
#undef HAVE_LIBNTFS3G
#endif
#if (defined(HAVE_LIBNTFS) || defined(HAVE_LIBNTFS3G))
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <errno.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#include <stdarg.h>
#ifdef HAVE_LIBNTFS
#include <ntfs/device.h>
#endif
#ifdef HAVE_LIBNTFS3G
#include <ntfs-3g/types.h>
#include <ntfs-3g/device.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "log.h"
#if defined(linux) && defined(_IO) && !defined(BLKGETSIZE)
# define BLKGETSIZE _IO(0x12,96) /* Get device size in 512byte blocks. */
#endif
static int ntfs_device_testdisk_io_open(struct ntfs_device *dev, int flags)
{
if (NDevOpen(dev)) {
errno = EBUSY;
return -1;
}
/* Setup our read-only flag. */
if ((flags & O_RDWR) != O_RDWR)
NDevSetReadOnly(dev);
/* Set our open flag. */
NDevSetOpen(dev);
return 0;
}
static int ntfs_device_testdisk_io_close(struct ntfs_device *dev)
{
if (!NDevOpen(dev)) {
errno = EBADF;
return -1;
}
NDevClearOpen(dev);
return 0;
}
static s64 ntfs_device_testdisk_io_seek(struct ntfs_device *dev, s64 offset,
int whence)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
switch(whence)
{
case SEEK_SET:
my_data->offset=offset;
break;
case SEEK_CUR:
my_data->offset+=offset;
break;
case SEEK_END:
my_data->offset=my_data->partition->part_size+offset;
break;
}
return my_data->offset;
}
static s64 ntfs_device_testdisk_io_read(struct ntfs_device *dev, void *buf,
s64 count)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
if(my_data->disk_car->pread(my_data->disk_car, buf, count, my_data->partition->part_offset + my_data->offset) != count)
return 0;
my_data->offset+=count;
return count;
}
static s64 ntfs_device_testdisk_io_write(struct ntfs_device *dev, const void *buf,
s64 count)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
if(my_data->disk_car->pwrite(my_data->disk_car, buf, count, my_data->partition->part_offset + my_data->offset) != count)
return 0;
my_data->offset+=count;
return count;
}
static s64 ntfs_device_testdisk_io_pread(struct ntfs_device *dev, void *buf,
s64 count, s64 offset)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
return my_data->disk_car->pread(my_data->disk_car, buf, count,
my_data->partition->part_offset + offset);
}
static s64 ntfs_device_testdisk_io_pwrite(struct ntfs_device *dev, const void *buf,
s64 count, s64 offset)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
return my_data->disk_car->pwrite(my_data->disk_car, buf, count,
my_data->partition->part_offset + offset);
}
static int ntfs_device_testdisk_io_sync(struct ntfs_device *dev)
{
my_data_t *my_data=(my_data_t*)dev->d_private;
return my_data->disk_car->sync(my_data->disk_car);
}
static int ntfs_device_testdisk_io_stat(struct ntfs_device *dev, struct stat *buf)
{
log_warning("ntfs_device_testdisk_io_stat() unimplemented\n");
#ifdef ENOTSUP
errno = ENOTSUP;
#endif
return -1;
}
#ifdef HAVE_LIBNTFS
static int ntfs_device_testdisk_io_ioctl(struct ntfs_device *dev, int request,
void *argp)
{
log_warning( "ntfs_device_testdisk_io_ioctl() unimplemented\n");
#ifdef ENOTSUP
errno = ENOTSUP;
#endif
return -1;
}
#else
static int ntfs_device_testdisk_io_ioctl(struct ntfs_device *dev, unsigned long request,
void *argp)
{
log_warning( "ntfs_device_testdisk_io_ioctl() unimplemented\n");
#ifdef ENOTSUP
errno = ENOTSUP;
#endif
return -1;
}
#endif
/**
* Device operations for working with unix style devices and files.
*/
struct ntfs_device_operations ntfs_device_testdisk_io_ops = {
.open = &ntfs_device_testdisk_io_open,
.close = &ntfs_device_testdisk_io_close,
.seek = &ntfs_device_testdisk_io_seek,
.read = &ntfs_device_testdisk_io_read,
.write = &ntfs_device_testdisk_io_write,
.pread = &ntfs_device_testdisk_io_pread,
.pwrite = &ntfs_device_testdisk_io_pwrite,
.sync = &ntfs_device_testdisk_io_sync,
.stat = &ntfs_device_testdisk_io_stat,
.ioctl = &ntfs_device_testdisk_io_ioctl,
};
#endif
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