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 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