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