123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
/*
|
|
* dupfs.c --- duplicate a ext2 filesystem handle
|
|
*
|
|
* Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Library
|
|
* General Public License, version 2.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <time.h>
|
|
#include <string.h>
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fsP.h"
|
|
|
|
errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest)
|
|
{
|
|
ext2_filsys fs;
|
|
errcode_t retval;
|
|
|
|
EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS);
|
|
|
|
retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
|
|
if (retval)
|
|
return retval;
|
|
|
|
*fs = *src;
|
|
fs->device_name = 0;
|
|
fs->super = 0;
|
|
fs->orig_super = 0;
|
|
fs->group_desc = 0;
|
|
fs->inode_map = 0;
|
|
fs->block_map = 0;
|
|
fs->badblocks = 0;
|
|
fs->dblist = 0;
|
|
fs->mmp_buf = 0;
|
|
fs->mmp_cmp = 0;
|
|
fs->mmp_fd = -1;
|
|
|
|
io_channel_bumpcount(fs->io);
|
|
if (fs->icache)
|
|
fs->icache->refcount++;
|
|
|
|
retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name);
|
|
if (retval)
|
|
goto errout;
|
|
strcpy(fs->device_name, src->device_name);
|
|
|
|
retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
|
|
if (retval)
|
|
goto errout;
|
|
memcpy(fs->super, src->super, SUPERBLOCK_SIZE);
|
|
|
|
retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
|
|
if (retval)
|
|
goto errout;
|
|
memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE);
|
|
|
|
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
|
|
&fs->group_desc);
|
|
if (retval)
|
|
goto errout;
|
|
memcpy(fs->group_desc, src->group_desc,
|
|
(size_t) fs->desc_blocks * fs->blocksize);
|
|
|
|
if (src->inode_map) {
|
|
retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map);
|
|
if (retval)
|
|
goto errout;
|
|
}
|
|
if (src->block_map) {
|
|
retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map);
|
|
if (retval)
|
|
goto errout;
|
|
}
|
|
if (src->badblocks) {
|
|
retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks);
|
|
if (retval)
|
|
goto errout;
|
|
}
|
|
if (src->dblist) {
|
|
retval = ext2fs_copy_dblist(src->dblist, &fs->dblist);
|
|
if (retval)
|
|
goto errout;
|
|
}
|
|
if (src->mmp_buf) {
|
|
retval = ext2fs_get_mem(src->blocksize, &fs->mmp_buf);
|
|
if (retval)
|
|
goto errout;
|
|
memcpy(fs->mmp_buf, src->mmp_buf, src->blocksize);
|
|
}
|
|
if (src->mmp_fd >= 0) {
|
|
fs->mmp_fd = dup(src->mmp_fd);
|
|
if (fs->mmp_fd < 0) {
|
|
retval = EXT2_ET_MMP_OPEN_DIRECT;
|
|
goto errout;
|
|
}
|
|
}
|
|
if (src->mmp_cmp) {
|
|
int align = ext2fs_get_dio_alignment(src->mmp_fd);
|
|
|
|
retval = ext2fs_get_memalign(src->blocksize, align,
|
|
&fs->mmp_cmp);
|
|
if (retval)
|
|
goto errout;
|
|
memcpy(fs->mmp_cmp, src->mmp_cmp, src->blocksize);
|
|
}
|
|
*dest = fs;
|
|
return 0;
|
|
errout:
|
|
ext2fs_free(fs);
|
|
return retval;
|
|
|
|
}
|
|
|