1 /* $NetBSD: cd9660.c,v 1.1 2018/01/09 03:31:15 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2017 The NetBSD Foundation, Inc.
5 * Copyright (c) 2016 The DragonFly Project
6 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Copyright (c) 2014 The FreeBSD Foundation
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Tomohiro Kusumi <kusumi.tomohiro@gmail.com>.
12 *
13 * This software was developed by Edward Tomasz Napierala under sponsorship
14 * from the FreeBSD Foundation.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37 #include <sys/cdefs.h>
38 __RCSID("$NetBSD: cd9660.c,v 1.1 2018/01/09 03:31:15 christos Exp $");
39
40 #include <sys/param.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44
45 #include "fstyp.h"
46
47 #define ISO9660_MAGIC "\x01" "CD001" "\x01\x00"
48 #define ISO9660_OFFSET 0x8000
49 #define VOLUME_LEN 32
50
51 int
fstyp_cd9660(FILE * fp,char * label,size_t size)52 fstyp_cd9660(FILE *fp, char *label, size_t size)
53 {
54 char *sector, *volume;
55
56 sector = read_buf(fp, ISO9660_OFFSET, 512);
57 if (sector == NULL)
58 return 1;
59 if (bcmp(sector, ISO9660_MAGIC, sizeof(ISO9660_MAGIC) - 1) != 0) {
60 free(sector);
61 return 1;
62 }
63 volume = sector + 0x28;
64 bzero(label, size);
65 strlcpy(label, volume, MIN(size, VOLUME_LEN));
66 free(sector);
67 rtrim(label, size);
68 return 0;
69 }
70