1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021 Miguel Gocobachi
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#include <sys/cdefs.h>
31#include <stdint.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35
36#include "fstyp.h"
37
38#define B_OS_NAME_LENGTH	32
39#define BEFS_BLOCK_OFFSET	512
40#define BEFS_SUPER_BLOCK_MAGIC1	0x42465331
41
42struct disk_super_block {
43    char	name[B_OS_NAME_LENGTH];
44    int32_t	magic1;
45};
46
47int
48fstyp_befs(FILE *fp, char *label, size_t size)
49{
50	struct disk_super_block *volume;
51
52	volume = read_buf(fp, BEFS_BLOCK_OFFSET, sizeof(*volume));
53
54	if (volume == NULL) {
55		return (1);
56	}
57
58	if (volume->magic1 == BEFS_SUPER_BLOCK_MAGIC1) {
59		strlcpy(label, volume->name, size);
60		free(volume);
61
62		return (0);
63	}
64
65	free(volume);
66
67	return (1);
68}
69