src/kits/network/netresolv/irs/getprotoent.c

   1 /*      $NetBSD: getprotoent.c,v 1.12 2008/04/28 20:23:00 martin 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  *
  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 #include <sys/cdefs.h>
  32
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 __RCSID("$NetBSD: getprotoent.c,v 1.12 2008/04/28 20:23:00 martin Exp $");
  35 #endif /* LIBC_SCCS and not lint */
  36
  37 #include <netdb.h>
  38
  39 #include "protoent.h"
  40
  41 #ifdef __weak_alias
  42 __weak_alias(endprotoent,_endprotoent)
  43 __weak_alias(getprotoent,_getprotoent)
  44 __weak_alias(setprotoent,_setprotoent)
  45 #endif
  46
  47 #ifdef _REENTRANT
  48 pthread_mutex_t _protoent_mutex = PTHREAD_MUTEX_INITIALIZER;
  49 #endif
  50 struct protoent_data _protoent_data;
  51
  52 void
  53 setprotoent(int f)
  54 {
  55         pthread_mutex_lock(&_protoent_mutex);
  56         setprotoent_r(f, &_protoent_data);
  57         pthread_mutex_unlock(&_protoent_mutex);
  58 }
  59
  60 void
  61 endprotoent(void)
  62 {
  63         pthread_mutex_lock(&_protoent_mutex);
  64         endprotoent_r(&_protoent_data);
  65         pthread_mutex_unlock(&_protoent_mutex);
  66 }
  67
  68 struct protoent *
  69 getprotoent(void)
  70 {
  71         struct protoent *p;
  72
  73         pthread_mutex_lock(&_protoent_mutex);
  74         p = getprotoent_r(&_protoent_data.proto, &_protoent_data);
  75         pthread_mutex_unlock(&_protoent_mutex);
  76         return (p);
  77 }