1 /* $NetBSD: getlabelsector.c,v 1.5 2011/09/04 12:34:49 jmcneill 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 1.5 2011/09/04 12:34:49 jmcneill Exp $");
41 #endif
42
43 #include <sys/param.h>
44 #include <sys/sysctl.h>
45 #include <util.h>
46
47 int
getlabelsector(void)48 getlabelsector(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, §or, &varlen, NULL, (size_t)0) < 0)
57 return (-1);
58
59 return sector;
60 }
61
62 off_t
getlabeloffset(void)63 getlabeloffset(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
77 int
getlabelusesmbr(void)78 getlabelusesmbr(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