1/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2004 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 romfs_super {
30	uint8_t magic[8];
31	uint32_t size;
32	uint32_t checksum;
33	uint8_t name[0];
34} PACKED;
35
36int volume_id_probe_romfs(struct volume_id *id, uint64_t off, uint64_t size)
37{
38	struct romfs_super *rfs;
39
40	info("probing at offset 0x%llx", (unsigned long long) off);
41
42	rfs = (struct romfs_super *) volume_id_get_buffer(id, off, 0x200);
43	if (rfs == NULL)
44		return -1;
45
46	if (memcmp(rfs->magic, "-rom1fs-", 4) == 0) {
47		size_t len = strlen((char *)rfs->name);
48
49		if (len) {
50			volume_id_set_label_raw(id, rfs->name, len);
51			volume_id_set_label_string(id, rfs->name, len);
52		}
53
54		volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
55		id->type = "romfs";
56		return 0;
57	}
58
59	return -1;
60}
61