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 fs->mmp_buf = 0; 43 fs->mmp_cmp = 0; 44 fs->mmp_fd = -1; 45 46 io_channel_bumpcount(fs->io); 47 if (fs->icache) 48 fs->icache->refcount++; 49 50 retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name); 51 if (retval) 52 goto errout; 53 strcpy(fs->device_name, src->device_name); 54 55 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super); 56 if (retval) 57 goto errout; 58 memcpy(fs->super, src->super, SUPERBLOCK_SIZE); 59 60 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super); 61 if (retval) 62 goto errout; 63 memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE); 64 65 retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize, 66 &fs->group_desc); 67 if (retval) 68 goto errout; 69 memcpy(fs->group_desc, src->group_desc, 70 (size_t) fs->desc_blocks * fs->blocksize); 71 72 if (src->inode_map) { 73 retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map); 74 if (retval) 75 goto errout; 76 } 77 if (src->block_map) { 78 retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map); 79 if (retval) 80 goto errout; 81 } 82 if (src->badblocks) { 83 retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks); 84 if (retval) 85 goto errout; 86 } 87 if (src->dblist) { 88 retval = ext2fs_copy_dblist(src->dblist, &fs->dblist); 89 if (retval) 90 goto errout; 91 } 92 if (src->mmp_buf) { 93 retval = ext2fs_get_mem(src->blocksize, &fs->mmp_buf); 94 if (retval) 95 goto errout; 96 memcpy(fs->mmp_buf, src->mmp_buf, src->blocksize); 97 } 98 if (src->mmp_fd >= 0) { 99 fs->mmp_fd = dup(src->mmp_fd); 100 if (fs->mmp_fd < 0) { 101 retval = EXT2_ET_MMP_OPEN_DIRECT; 102 goto errout; 103 } 104 } 105 if (src->mmp_cmp) { 106 int align = ext2fs_get_dio_alignment(src->mmp_fd); 107 108 retval = ext2fs_get_memalign(src->blocksize, align, 109 &fs->mmp_cmp); 110 if (retval) 111 goto errout; 112 memcpy(fs->mmp_cmp, src->mmp_cmp, src->blocksize); 113 } 114 *dest = fs; 115 return 0; 116 errout: 117 ext2fs_free(fs); 118 return retval; 119 120 } 121 122
