1/*	$NetBSD: getlabelsector.c,v 1.4 2011/08/30 12:39:52 bouyer Exp $	*/
2
3/*
4 * Copyright 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed for the NetBSD Project by
20 *      Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39#if defined(LIBC_SCCS) && !defined(lint)
40__RCSID("$NetBSD: getlabelsector.c,v 1.4 2011/08/30 12:39:52 bouyer Exp $");
41#endif
42
43#include <sys/param.h>
44#include <sys/sysctl.h>
45#include <util.h>
46
47int
48getlabelsector(void)
49{
50	int sector, mib[2];
51	size_t varlen;
52
53	mib[0] = CTL_KERN;
54	mib[1] = KERN_LABELSECTOR;
55	varlen = sizeof(sector);
56	if (sysctl(mib, 2, &sector, &varlen, NULL, (size_t)0) < 0)
57		return (-1);
58
59	return sector;
60}
61
62off_t
63getlabeloffset(void)
64{
65	int offset, mib[2];
66	size_t varlen;
67
68	mib[0] = CTL_KERN;
69	mib[1] = KERN_LABELOFFSET;
70	varlen = sizeof(offset);
71	if (sysctl(mib, 2, &offset, &varlen, NULL, (size_t)0) < 0)
72		return (-1);
73
74	return ((off_t)offset);
75}
76
77int
78getlabelusesmbr(void)
79{
80	int use;
81	size_t uselen;
82
83	uselen = sizeof(use);
84	if (sysctlbyname("kern.labelusesmbr", &use, &uselen,
85	    NULL, (size_t)0) < 0)
86		return (-1);
87
88	return use;
89}
90