97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
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/*
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* dupfs.c --- duplicate a ext2 filesystem handle
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*
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* Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <stdio.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <time.h>
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#include <string.h>
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#include "ext2_fs.h"
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#include "ext2fsP.h"
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errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest)
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{
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ext2_filsys fs;
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errcode_t retval;
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EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
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if (retval)
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return retval;
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*fs = *src;
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fs->device_name = 0;
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fs->super = 0;
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fs->orig_super = 0;
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fs->group_desc = 0;
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fs->inode_map = 0;
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fs->block_map = 0;
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fs->badblocks = 0;
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fs->dblist = 0;
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io_channel_bumpcount(fs->io);
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if (fs->icache)
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fs->icache->refcount++;
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retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name);
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if (retval)
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goto errout;
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strcpy(fs->device_name, src->device_name);
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retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
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if (retval)
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goto errout;
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memcpy(fs->super, src->super, SUPERBLOCK_SIZE);
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retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
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if (retval)
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goto errout;
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memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE);
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retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize,
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&fs->group_desc);
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if (retval)
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goto errout;
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memcpy(fs->group_desc, src->group_desc,
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(size_t) fs->desc_blocks * fs->blocksize);
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if (src->inode_map) {
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retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map);
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if (retval)
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goto errout;
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}
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if (src->block_map) {
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retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map);
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if (retval)
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goto errout;
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}
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if (src->badblocks) {
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retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks);
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if (retval)
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goto errout;
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}
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if (src->dblist) {
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retval = ext2fs_copy_dblist(src->dblist, &fs->dblist);
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if (retval)
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goto errout;
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}
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*dest = fs;
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return 0;
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errout:
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ext2fs_free(fs);
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return retval;
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}
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