text: /* vi: set sw=4 ts=4: */
  /*
   * dupfs.c --- duplicate a ext2 filesystem handle
   *
   * Copyright (C) 1997, 1998, 2001, 2003, 2005 by Theodore Ts'o.
   *
   * %Begin-Header%
   * This file may be redistributed under the terms of the GNU Public
   * License.
   * %End-Header%
   */
  
  #include <stdio.h>
  #if HAVE_UNISTD_H
  #include <unistd.h>
  #endif
  #include <time.h>
  #include <string.h>
  
  #include "ext2_fs.h"
  #include "ext2fsP.h"
  
  errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest)
  {
  	ext2_filsys	fs;
  	errcode_t	retval;
  
  	EXT2_CHECK_MAGIC(src, EXT2_ET_MAGIC_EXT2FS_FILSYS);
  
  	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
  	if (retval)
  		return retval;
  
  	*fs = *src;
  	fs->device_name = 0;
  	fs->super = 0;
  	fs->orig_super = 0;
  	fs->group_desc = 0;
  	fs->inode_map = 0;
  	fs->block_map = 0;
  	fs->badblocks = 0;
  	fs->dblist = 0;
  
  	io_channel_bumpcount(fs->io);
  	if (fs->icache)
  		fs->icache->refcount++;
  
  	retval = ext2fs_get_mem(strlen(src->device_name)+1, &fs->device_name);
  	if (retval)
  		goto errout;
  	strcpy(fs->device_name, src->device_name);
  
  	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
  	if (retval)
  		goto errout;
  	memcpy(fs->super, src->super, SUPERBLOCK_SIZE);
  
  	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
  	if (retval)
  		goto errout;
  	memcpy(fs->orig_super, src->orig_super, SUPERBLOCK_SIZE);
  
  	retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize,
  				&fs->group_desc);
  	if (retval)
  		goto errout;
  	memcpy(fs->group_desc, src->group_desc,
  	       (size_t) fs->desc_blocks * fs->blocksize);
  
  	if (src->inode_map) {
  		retval = ext2fs_copy_bitmap(src->inode_map, &fs->inode_map);
  		if (retval)
  			goto errout;
  	}
  	if (src->block_map) {
  		retval = ext2fs_copy_bitmap(src->block_map, &fs->block_map);
  		if (retval)
  			goto errout;
  	}
  	if (src->badblocks) {
  		retval = ext2fs_badblocks_copy(src->badblocks, &fs->badblocks);
  		if (retval)
  			goto errout;
  	}
  	if (src->dblist) {
  		retval = ext2fs_copy_dblist(src->dblist, &fs->dblist);
  		if (retval)
  			goto errout;
  	}
  	*dest = fs;
  	return 0;
  errout:
  	ext2fs_free(fs);
  	return retval;
  }
  