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