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 Library 8 * General Public License, version 2. 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 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
