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res_state.c revision 1.5 
      1 /*	$NetBSD: res_state.c,v 1.5 2004/06/09 18:07:03 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  * 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 
     39 #include <sys/cdefs.h>
     40 #if defined(LIBC_SCCS) && !defined(lint)
     41 __RCSID("$NetBSD: res_state.c,v 1.5 2004/06/09 18:07:03 christos Exp $");
     42 #endif
     43 
     44 #include <sys/types.h>
     45 #include <arpa/inet.h>
     46 #include <arpa/nameser.h>
     47 #include <netdb.h>
     48 #include <resolv.h>
     49 
     50 struct __res_state _nres;
     51 
     52 res_state __res_get_state_nothread(void);
     53 void __res_put_state_nothread(res_state);
     54 
     55 #ifdef __weak_alias
     56 __weak_alias(__res_get_state, __res_get_state_nothread)
     57 __weak_alias(__res_put_state, __res_put_state_nothread)
     58 /* Source compatibility; only for single threaded programs */
     59 __weak_alias(__res_state, __res_get_state_nothread)
     60 #endif
     61 
     62 res_state
     63 __res_get_state_nothread(void)
     64 {
     65 	if ((_nres.options & RES_INIT) == 0 && res_ninit(&_nres) == -1) {
     66 		h_errno = NETDB_INTERNAL;
     67 		return NULL;
     68 	}
     69 	return &_nres;
     70 }
     71 
     72 void
     73 /*ARGSUSED*/
     74 __res_put_state_nothread(res_state res)
     75 {
     76 }
     77