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      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  */
     59 int
     60 sysctlnametomib(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