blob: d1879377a01a679561419e5e3075821269b3e1fd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * dupfs.c --- duplicate a ext2 filesystem handle |
4 | * |
5 | * Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o. |
6 | * |
7 | * %Begin-Header% |
8 | * This file may be redistributed under the terms of the GNU Public |
9 | * License. |
10 | * %End-Header% |
11 | */ |
12 | |
13 | #include <stdio.h> |
14 | #if HAVE_UNISTD_H |
15 | #include <unistd.h> |
16 | #endif |
17 | #include <time.h> |
18 | #include <string.h> |
19 | |
20 | #include "ext2_fs.h" |
21 | #include "ext2fsP.h" |
22 | |
23 | errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest) |
24 | { |
25 | ext2_filsys fs; |
26 | errcode_t retval; |
27 | |
28 | EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
29 | |
30 | retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs); |
31 | if (retval) |
32 | return retval; |
33 | |
34 | *fs = *src; |
35 | fs->device_name = 0; |
36 | fs->super = 0; |
37 | fs->orig_super = 0; |
38 | fs->group_desc = 0; |
39 | fs->inode_map = 0; |
40 | fs->block_map = 0; |
41 | fs->badblocks = 0; |
42 | fs->dblist = 0; |
43 | |
44 | io_channel_bumpcount(fs->io); |
45 | if (fs->icache) |
46 | fs->icache->refcount++; |
47 | |
48 | retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name); |
49 | if (retval) |
50 | goto errout; |
51 | strcpy(fs->device_name, src->device_name); |
52 | |
53 | retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super); |
54 | if (retval) |
55 | goto errout; |
56 | memcpy(fs->super, src->super, SUPERBLOCK_SIZE); |
57 | |
58 | retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super); |
59 | if (retval) |
60 | goto errout; |
61 | memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE); |
62 | |
63 | retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize, |
64 | &fs->group_desc); |
65 | if (retval) |
66 | goto errout; |
67 | memcpy(fs->group_desc, src->group_desc, |
68 | (size_t) fs->desc_blocks * fs->blocksize); |
69 | |
70 | if (src->inode_map) { |
71 | retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map); |
72 | if (retval) |
73 | goto errout; |
74 | } |
75 | if (src->block_map) { |
76 | retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map); |
77 | if (retval) |
78 | goto errout; |
79 | } |
80 | if (src->badblocks) { |
81 | retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks); |
82 | if (retval) |
83 | goto errout; |
84 | } |
85 | if (src->dblist) { |
86 | retval = ext2fs_copy_dblist(src->dblist, &fs->dblist); |
87 | if (retval) |
88 | goto errout; |
89 | } |
90 | *dest = fs; |
91 | return 0; |
92 | errout: |
93 | ext2fs_free(fs); |
94 | return retval; |
95 | } |
96 |