1/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
5 *
6 *	This program is free software; you can redistribute it and/or modify it
7 *	under the terms of the GNU General Public License as published by the
8 *	Free Software Foundation version 2 of the License.
9 */
10
11#ifndef _GNU_SOURCE
12#define _GNU_SOURCE 1
13#endif
14
15#ifdef HAVE_CONFIG_H
16#  include <config.h>
17#endif
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <unistd.h>
22#include <string.h>
23#include <errno.h>
24#include <ctype.h>
25
26#include "libvolume_id.h"
27#include "util.h"
28
29struct hpfs_super
30{
31	uint8_t		magic[4];
32	uint8_t		version;
33} PACKED;
34
35#define HPFS_SUPERBLOCK_OFFSET			0x2000
36
37int volume_id_probe_hpfs(struct volume_id *id, uint64_t off, uint64_t size)
38{
39	struct hpfs_super *hs;
40
41	info("probing at offset 0x%llx", (unsigned long long) off);
42
43	hs = (struct hpfs_super *) volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_OFFSET, 0x200);
44	if (hs == NULL)
45		return -1;
46
47	if (memcmp(hs->magic, "\x49\xe8\x95\xf9", 4) == 0) {
48		sprintf(id->type_version, "%u", hs->version);
49
50		volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
51		id->type = "hpfs";
52		return 0;
53	}
54
55	return -1;
56}
57