minix/lib/libutil/getlabelsector.c

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2012-09-11 18:02:49 +02:00
/* $NetBSD: getlabelsector.c,v 1.5 2011/09/04 12:34:49 jmcneill Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Steve C. Woodford for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: getlabelsector.c,v 1.5 2011/09/04 12:34:49 jmcneill Exp $");
#endif
#include <sys/param.h>
#include <sys/sysctl.h>
#include <util.h>
int
getlabelsector(void)
{
int sector, mib[2];
size_t varlen;
mib[0] = CTL_KERN;
mib[1] = KERN_LABELSECTOR;
varlen = sizeof(sector);
if (sysctl(mib, 2, &sector, &varlen, NULL, (size_t)0) < 0)
return (-1);
return sector;
}
off_t
getlabeloffset(void)
{
int offset, mib[2];
size_t varlen;
mib[0] = CTL_KERN;
mib[1] = KERN_LABELOFFSET;
varlen = sizeof(offset);
if (sysctl(mib, 2, &offset, &varlen, NULL, (size_t)0) < 0)
return (-1);
return ((off_t)offset);
}
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int
getlabelusesmbr(void)
{
int use;
size_t uselen;
uselen = sizeof(use);
if (sysctlbyname("kern.labelusesmbr", &use, &uselen,
NULL, (size_t)0) < 0)
return (-1);
return use;
}