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getprotoent.c revision 1.10 
      1 /*	$NetBSD: getprotoent.c,v 1.10 2005/01/07 22:22:49 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 #include <sys/cdefs.h>
     39 
     40 #if defined(LIBC_SCCS) && !defined(lint)
     41 __RCSID("$NetBSD: getprotoent.c,v 1.10 2005/01/07 22:22:49 mycroft Exp $");
     42 #endif /* LIBC_SCCS and not lint */
     43 
     44 #include "namespace.h"
     45 #include "reentrant.h"
     46 
     47 #include <netdb.h>
     48 
     49 #ifdef __weak_alias
     50 __weak_alias(endprotoent,_endprotoent)
     51 __weak_alias(getprotoent,_getprotoent)
     52 __weak_alias(setprotoent,_setprotoent)
     53 #endif
     54 
     55 #ifdef _REENTRANT
     56 mutex_t _protoent_mutex = MUTEX_INITIALIZER;
     57 #endif
     58 struct protoent_data _protoent_data;
     59 
     60 void
     61 setprotoent(int f)
     62 {
     63 	mutex_lock(&_protoent_mutex);
     64 	setprotoent_r(f, &_protoent_data);
     65 	mutex_unlock(&_protoent_mutex);
     66 }
     67 
     68 void
     69 endprotoent(void)
     70 {
     71 	mutex_lock(&_protoent_mutex);
     72 	endprotoent_r(&_protoent_data);
     73 	mutex_unlock(&_protoent_mutex);
     74 }
     75 
     76 struct protoent *
     77 getprotoent(void)
     78 {
     79 	struct protoent *p;
     80 
     81 	mutex_lock(&_protoent_mutex);
     82 	p = getprotoent_r(&_protoent_data.proto, &_protoent_data);
     83 	mutex_unlock(&_protoent_mutex);
     84 	return (p);
     85 }
     86