dupfs.c revision ee01079a17bfecd17292ccd60058056fb3a8ba6c 
1/*
2 * dupfs.c --- duplicate a ext2 filesystem handle
3 *
4 * Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12#include <stdio.h>
13#if HAVE_UNISTD_H
14#include <unistd.h>
15#endif
16#include <time.h>
17#include <string.h>
18
19#include "ext2_fs.h"
20#include "ext2fsP.h"
21
22errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest)
23{
24	ext2_filsys	fs;
25	errcode_t	retval;
26
27	EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS);
28
29	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
30	if (retval)
31		return retval;
32
33	*fs = *src;
34	fs->device_name = 0;
35	fs->super = 0;
36	fs->orig_super = 0;
37	fs->group_desc = 0;
38	fs->inode_map = 0;
39	fs->block_map = 0;
40	fs->badblocks = 0;
41	fs->dblist = 0;
42
43	io_channel_bumpcount(fs->io);
44	if (fs->icache)
45		fs->icache->refcount++;
46
47	retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name);
48	if (retval)
49		goto errout;
50	strcpy(fs->device_name, src->device_name);
51
52	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
53	if (retval)
54		goto errout;
55	memcpy(fs->super, src->super, SUPERBLOCK_SIZE);
56
57	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
58	if (retval)
59		goto errout;
60	memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE);
61
62	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
63				&fs->group_desc);
64	if (retval)
65		goto errout;
66	memcpy(fs->group_desc, src->group_desc,
67	       (size_t) fs->desc_blocks * fs->blocksize);
68
69	if (src->inode_map) {
70		retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map);
71		if (retval)
72			goto errout;
73	}
74	if (src->block_map) {
75		retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map);
76		if (retval)
77			goto errout;
78	}
79	if (src->badblocks) {
80		retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks);
81		if (retval)
82			goto errout;
83	}
84	if (src->dblist) {
85		retval = ext2fs_copy_dblist(src->dblist, &fs->dblist);
86		if (retval)
87			goto errout;
88	}
89	*dest = fs;
90	return 0;
91errout:
92	ext2fs_free(fs);
93	return retval;
94
95}
96
97