1 /* $OpenBSD: disklabel.c,v 1.4 2003/06/02 23:28:09 millert Exp $ */ 2 /* $NetBSD: disklabel.c,v 1.3 1994/10/26 05:44:42 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)disklabel.c 8.1 (Berkeley) 6/11/93 33 */ 34 35 #include <sys/param.h> 36 #include <sys/disklabel.h> 37 #include "stand.h" 38 39 char * 40 getdisklabel(buf, lp) 41 const char *buf; 42 struct disklabel *lp; 43 { 44 struct disklabel *dlp, *elp; 45 char *msg = (char *)0; 46 47 elp = (struct disklabel *)(buf + DEV_BSIZE - sizeof(*dlp)); 48 for (dlp = (struct disklabel *)buf; dlp <= elp; 49 dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { 50 if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) { 51 if (msg == (char *)0) 52 msg = "no disk label"; 53 } else if (dlp->d_npartitions > MAXPARTITIONS || 54 dkcksum(dlp) != 0) 55 msg = "disk label corrupted"; 56 else { 57 *lp = *dlp; 58 msg = (char *)0; 59 break; 60 } 61 } 62 return (msg); 63 } 64