1 /* $NetBSD: sysctlbyname.c,v 1.7 2010/12/13 23:10:13 pooka 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: sysctlbyname.c,v 1.7 2010/12/13 23:10:13 pooka 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
43 #ifdef RUMP_ACTION
44 #include <rump/rump_syscalls.h>
45 #define sysctl(a,b,c,d,e,f) rump_sys___sysctl(a,b,c,d,e,f)
46 #else
47 #ifdef __weak_alias
__weak_alias(sysctlbyname,_sysctlbyname)48 __weak_alias(sysctlbyname,_sysctlbyname)
49 #endif
50 #endif
51
52 /*
53 * trivial sysctlbyname() function for the "lazy".
54 */
55 int
56 sysctlbyname(const char *gname, void *oldp, size_t *oldlenp,
57 const void *newp, size_t newlen)
58 {
59 int name[CTL_MAXNAME], rc;
60 u_int namelen;
61
62 rc = sysctlgetmibinfo(gname, &name[0], &namelen, NULL, NULL, NULL,
63 SYSCTL_VERSION);
64 if (rc == 0)
65 rc = sysctl(&name[0], namelen, oldp, oldlenp, newp, newlen);
66 return (rc);
67 }
68