disklabel_scan.c revision 1.1.2.2
1 1.1.2.2 cyber /* $NetBSD: disklabel_scan.c,v 1.1.2.2 2003/10/25 03:32:21 cyber Exp $ */ 2 1.1.2.2 cyber 3 1.1.2.2 cyber /*- 4 1.1.2.2 cyber * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 1.1.2.2 cyber * All rights reserved. 6 1.1.2.2 cyber * 7 1.1.2.2 cyber * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 cyber * by Roland C. Dowdeswell. 9 1.1.2.2 cyber * 10 1.1.2.2 cyber * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 cyber * modification, are permitted provided that the following conditions 12 1.1.2.2 cyber * are met: 13 1.1.2.2 cyber * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 cyber * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 cyber * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 cyber * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 cyber * documentation and/or other materials provided with the distribution. 18 1.1.2.2 cyber * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 cyber * must display the following acknowledgement: 20 1.1.2.2 cyber * This product includes software developed by the NetBSD 21 1.1.2.2 cyber * Foundation, Inc. and its contributors. 22 1.1.2.2 cyber * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 cyber * contributors may be used to endorse or promote products derived 24 1.1.2.2 cyber * from this software without specific prior written permission. 25 1.1.2.2 cyber * 26 1.1.2.2 cyber * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 cyber * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 cyber * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 cyber * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 cyber * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 cyber * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 cyber * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 cyber * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 cyber * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 cyber * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 cyber * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 cyber */ 38 1.1.2.2 cyber 39 1.1.2.2 cyber #include <sys/cdefs.h> 40 1.1.2.2 cyber #ifndef lint 41 1.1.2.2 cyber __COPYRIGHT( 42 1.1.2.2 cyber "@(#) Copyright (c) 2002\ 43 1.1.2.2 cyber The NetBSD Foundation, Inc. All rights reserved."); 44 1.1.2.2 cyber __RCSID("$NetBSD: disklabel_scan.c,v 1.1.2.2 2003/10/25 03:32:21 cyber Exp $"); 45 1.1.2.2 cyber #endif 46 1.1.2.2 cyber 47 1.1.2.2 cyber #include <string.h> 48 1.1.2.2 cyber #include <unistd.h> 49 1.1.2.2 cyber #include <util.h> 50 1.1.2.2 cyber 51 1.1.2.2 cyber #include <sys/disklabel.h> 52 1.1.2.2 cyber 53 1.1.2.2 cyber #define SCAN_INCR 4 54 1.1.2.2 cyber 55 1.1.2.2 cyber int 56 1.1.2.2 cyber disklabel_scan(struct disklabel *lp, char *buf, size_t buflen) 57 1.1.2.2 cyber { 58 1.1.2.2 cyber int i; 59 1.1.2.2 cyber 60 1.1.2.2 cyber /* scan for the correct magic numbers. */ 61 1.1.2.2 cyber 62 1.1.2.2 cyber for (i=0; i <= buflen - sizeof(*lp); i += SCAN_INCR) { 63 1.1.2.2 cyber memcpy(lp, buf + i, sizeof(*lp)); 64 1.1.2.2 cyber if (lp->d_magic == DISKMAGIC && lp->d_magic2 == DISKMAGIC) 65 1.1.2.2 cyber goto sanity; 66 1.1.2.2 cyber } 67 1.1.2.2 cyber 68 1.1.2.2 cyber return 1; 69 1.1.2.2 cyber 70 1.1.2.2 cyber sanity: 71 1.1.2.2 cyber /* we've found something, let's sanity check it */ 72 1.1.2.2 cyber if (lp->d_npartitions > MAXPARTITIONS || disklabel_dkcksum(lp)) 73 1.1.2.2 cyber return 1; 74 1.1.2.2 cyber 75 1.1.2.2 cyber return 0; 76 1.1.2.2 cyber } 77
Indexes created Thu Oct 02 14:10:14 GMT 2025