| Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 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 | } |
| 97 | |