Home | History | Annotate | Line # | Download | only in fstyp 
      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 (at) 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 (at) 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
     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