1*599546b3Sderaadt /* $OpenBSD: disklabel.c,v 1.5 2003/08/11 06:23:09 deraadt Exp $ */
2df930be7Sderaadt /* $NetBSD: disklabel.c,v 1.3 1994/10/26 05:44:42 cgd Exp $ */
3df930be7Sderaadt
4df930be7Sderaadt /*-
5df930be7Sderaadt * Copyright (c) 1993
6df930be7Sderaadt * The Regents of the University of California. All rights reserved.
7df930be7Sderaadt *
8df930be7Sderaadt * Redistribution and use in source and binary forms, with or without
9df930be7Sderaadt * modification, are permitted provided that the following conditions
10df930be7Sderaadt * are met:
11df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright
12df930be7Sderaadt * notice, this list of conditions and the following disclaimer.
13df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright
14df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the
15df930be7Sderaadt * documentation and/or other materials provided with the distribution.
1629295d1cSmillert * 3. Neither the name of the University nor the names of its contributors
17df930be7Sderaadt * may be used to endorse or promote products derived from this software
18df930be7Sderaadt * without specific prior written permission.
19df930be7Sderaadt *
20df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30df930be7Sderaadt * SUCH DAMAGE.
31df930be7Sderaadt *
32df930be7Sderaadt * @(#)disklabel.c 8.1 (Berkeley) 6/11/93
33df930be7Sderaadt */
34df930be7Sderaadt
35df930be7Sderaadt #include <sys/param.h>
36df930be7Sderaadt #include <sys/disklabel.h>
3721c66822Sderaadt #include "stand.h"
38df930be7Sderaadt
39df930be7Sderaadt char *
getdisklabel(const char * buf,struct disklabel * lp)40*599546b3Sderaadt getdisklabel(const char *buf, struct disklabel *lp)
41df930be7Sderaadt {
42df930be7Sderaadt struct disklabel *dlp, *elp;
43*599546b3Sderaadt char *msg = NULL;
44df930be7Sderaadt
45df930be7Sderaadt elp = (struct disklabel *)(buf + DEV_BSIZE - sizeof(*dlp));
46df930be7Sderaadt for (dlp = (struct disklabel *)buf; dlp <= elp;
47df930be7Sderaadt dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
48df930be7Sderaadt if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
49*599546b3Sderaadt if (msg == NULL)
50df930be7Sderaadt msg = "no disk label";
51df930be7Sderaadt } else if (dlp->d_npartitions > MAXPARTITIONS ||
52df930be7Sderaadt dkcksum(dlp) != 0)
53df930be7Sderaadt msg = "disk label corrupted";
54df930be7Sderaadt else {
55df930be7Sderaadt *lp = *dlp;
56*599546b3Sderaadt msg = NULL;
57df930be7Sderaadt break;
58df930be7Sderaadt }
59df930be7Sderaadt }
60df930be7Sderaadt return (msg);
61df930be7Sderaadt }
62