sysctlnametomib.c revision 1.7 
1/*	$NetBSD: sysctlnametomib.c,v 1.7 2012/03/13 21:13:37 christos Exp $ */
2
3/*-
4 * Copyright (c) 2003,2004 The NetBSD Foundation, Inc.
5 *	All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Brown.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if defined(LIBC_SCCS) && !defined(lint)
34__RCSID("$NetBSD: sysctlnametomib.c,v 1.7 2012/03/13 21:13:37 christos Exp $");
35#endif /* LIBC_SCCS and not lint */
36
37#ifndef RUMP_ACTION
38#include "namespace.h"
39#endif
40#include <sys/param.h>
41#include <sys/sysctl.h>
42#include <assert.h>
43
44#ifdef RUMP_ACTION
45#include <rump/rump_syscalls.h>
46#define sysctl(a,b,c,d,e,f) rump_sys___sysctl(a,b,c,d,e,f)
47#else
48#ifdef __weak_alias
49__weak_alias(sysctlnametomib,_sysctlnametomib)
50#endif
51#endif /* RUMP_ACTION */
52
53/*
54 * freebsd compatible sysctlnametomib() function, implemented as an
55 * extremely thin wrapper around sysctlgetmibinfo().  i think the use
56 * of size_t as the third argument is erroneous, but what can we do
57 * about that?
58 */
59int
60sysctlnametomib(const char *gname, int *iname, size_t *namelenp)
61{
62	u_int unamelen;
63	int rc;
64
65	_DIAGASSERT(__type_fit(u_int, *namelenp));
66	unamelen = (u_int)*namelenp;
67	rc = sysctlgetmibinfo(gname, iname, &unamelen, NULL, NULL, NULL,
68			      SYSCTL_VERSION);
69	*namelenp = unamelen;
70
71	return (rc);
72}
73