minix/lib/libc/gen/sysctlnametomib.c

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/* $NetBSD: sysctlnametomib.c,v 1.7 2012/03/13 21:13:37 christos Exp $ */
/*-
* Copyright (c) 2003,2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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)
__RCSID("$NetBSD: sysctlnametomib.c,v 1.7 2012/03/13 21:13:37 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#ifndef RUMP_ACTION
#include "namespace.h"
#endif
#include <sys/param.h>
#include <sys/sysctl.h>
#include <assert.h>
#ifdef RUMP_ACTION
#include <rump/rump_syscalls.h>
#define sysctl(a,b,c,d,e,f) rump_sys___sysctl(a,b,c,d,e,f)
#else
#ifdef __weak_alias
__weak_alias(sysctlnametomib,_sysctlnametomib)
#endif
#endif /* RUMP_ACTION */
/*
* freebsd compatible sysctlnametomib() function, implemented as an
* extremely thin wrapper around sysctlgetmibinfo(). i think the use
* of size_t as the third argument is erroneous, but what can we do
* about that?
*/
int
sysctlnametomib(const char *gname, int *iname, size_t *namelenp)
{
u_int unamelen;
int rc;
_DIAGASSERT(__type_fit(u_int, *namelenp));
unamelen = (u_int)*namelenp;
rc = sysctlgetmibinfo(gname, iname, &unamelen, NULL, NULL, NULL,
SYSCTL_VERSION);
*namelenp = unamelen;
return (rc);
}