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
ext2fs_dup_handle(ext2_filsys src,ext2_filsys * dest)22 errcode_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;
91 errout:
92 ext2fs_free(fs);
93 return retval;
94
95 }
96
97