1 /* $NetBSD: disklabel.c,v 1.6 2003/08/07 16:32:26 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)disklabel.c 8.1 (Berkeley) 6/11/93 32 */ 33 34 #include <sys/param.h> 35 #include <sys/disklabel.h> 36 #include "stand.h" 37 38 char * 39 getdisklabel(buf, lp) 40 const char *buf; 41 struct disklabel *lp; 42 { 43 struct disklabel *dlp, *elp; 44 char *msg = (char *)0; 45 46 elp = (struct disklabel *)(buf + DEV_BSIZE - sizeof(*dlp)); 47 for (dlp = (struct disklabel *)buf; dlp <= elp; 48 dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { 49 if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) { 50 #if defined(LIBSA_NO_DISKLABEL_MSGS) 51 msg = (char *)1; 52 #else 53 if (msg == (char *)0) 54 msg = "no disk label"; 55 #endif 56 } else if (dlp->d_npartitions > MAXPARTITIONS || 57 dkcksum(dlp) != 0) 58 #if defined(LIBSA_NO_DISKLABEL_MSGS) 59 msg = (char *)1; 60 #else 61 msg = "disk label corrupted"; 62 #endif 63 else { 64 bcopy(dlp, lp, sizeof *lp); 65 msg = (char *)0; 66 break; 67 } 68 } 69 return (msg); 70 } 71