1 files changed, 93 insertions, 0 deletions
diff --git a/lib/ext2fs/dupfs.c b/lib/ext2fs/dupfs.c
new file mode 100644
index 00000000..b2eee0b7
--- /dev/null
+++ b/lib/ext2fs/dupfs.c
@@ -0,0 +1,93 @@
+/*
+ * dupfs.c --- duplicate a ext2 filesystem handle
+ * 
+ * Copyright (C) 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#include <linux/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);
+	
+	fs = (ext2_filsys) malloc(sizeof(struct struct_ext2_filsys));
+	if (!fs)
+		return ENOMEM;
+
+	*fs = *src;
+	fs->device_name = 0;
+	fs->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 = ENOMEM;
+	fs->device_name = malloc(strlen(src->device_name)+1);
+	if (!fs->device_name)
+		goto errout;
+	strcpy(fs->device_name, src->device_name);
+
+	fs->super = malloc(SUPERBLOCK_SIZE);
+	if (!fs->super)
+		goto errout;
+	memcpy(fs->super, src->super, SUPERBLOCK_SIZE);
+
+	fs->group_desc = malloc(fs->desc_blocks * fs->blocksize);
+	if (!fs->group_desc)
+		goto errout;
+	memcpy(fs->group_desc, src->group_desc,
+	       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;
+	
+}
+