1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 __FBSDID("$FreeBSD$");
32
33 #include <stdint.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37
38 #include "fstyp.h"
39
40 #define B_OS_NAME_LENGTH 32
41 #define BEFS_BLOCK_OFFSET 512
42 #define BEFS_SUPER_BLOCK_MAGIC1 0x42465331
43
44 struct disk_super_block {
45 char name[B_OS_NAME_LENGTH];
46 int32_t magic1;
47 };
48
49 int
fstyp_befs(FILE * fp,char * label,size_t size)50 fstyp_befs(FILE *fp, char *label, size_t size)
51 {
52 struct disk_super_block *volume;
53
54 volume = read_buf(fp, BEFS_BLOCK_OFFSET, sizeof(*volume));
55
56 if (volume == NULL) {
57 return (1);
58 }
59
60 if (volume->magic1 == BEFS_SUPER_BLOCK_MAGIC1) {
61 strlcpy(label, volume->name, size);
62 free(volume);
63
64 return (0);
65 }
66
67 free(volume);
68
69 return (1);
70 }
71