1 /* $OpenBSD: disklabel.c,v 1.3 1996/09/23 14:18:51 mickey 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)disklabel.c 8.1 (Berkeley) 6/11/93 37 */ 38 39 #include <sys/param.h> 40 #include <sys/disklabel.h> 41 #include "stand.h" 42 43 char * 44 getdisklabel(buf, lp) 45 const char *buf; 46 struct disklabel *lp; 47 { 48 struct disklabel *dlp, *elp; 49 char *msg = (char *)0; 50 51 elp = (struct disklabel *)(buf + DEV_BSIZE - sizeof(*dlp)); 52 for (dlp = (struct disklabel *)buf; dlp <= elp; 53 dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { 54 if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) { 55 if (msg == (char *)0) 56 msg = "no disk label"; 57 } else if (dlp->d_npartitions > MAXPARTITIONS || 58 dkcksum(dlp) != 0) 59 msg = "disk label corrupted"; 60 else { 61 *lp = *dlp; 62 msg = (char *)0; 63 break; 64 } 65 } 66 return (msg); 67 } 68