lib/libc/resolv/res_state.c

   1 /*      $NetBSD: res_state.c,v 1.8 2009/01/11 02:46:29 christos 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
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 __RCSID("$NetBSD: res_state.c,v 1.8 2009/01/11 02:46:29 christos Exp $");
  35 #endif
  36
  37 #include <sys/types.h>
  38 #include <arpa/inet.h>
  39 #include <arpa/nameser.h>
  40 #include <netdb.h>
  41 #include <resolv.h>
  42
  43 struct __res_state _nres
  44 # if defined(__BIND_RES_TEXT)
  45         = { .retrans = RES_TIMEOUT, }   /*%< Motorola, et al. */
  46 # endif
  47         ;
  48
  49 res_state __res_get_state_nothread(void);
  50 void __res_put_state_nothread(res_state);
  51
  52 #ifdef __weak_alias
  53 __weak_alias(__res_get_state, __res_get_state_nothread)
  54 __weak_alias(__res_put_state, __res_put_state_nothread)
  55 /* Source compatibility; only for single threaded programs */
  56 __weak_alias(__res_state, __res_get_state_nothread)
  57 #endif
  58
  59 res_state
  60 __res_get_state_nothread(void)
  61 {
  62         if ((_nres.options & RES_INIT) == 0 && res_ninit(&_nres) == -1) {
  63                 h_errno = NETDB_INTERNAL;
  64                 return NULL;
  65         }
  66         return &_nres;
  67 }
  68
  69 void
  70 /*ARGSUSED*/
  71 __res_put_state_nothread(res_state res)
  72 {
  73 }