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sethostent.c revision 1.16.36.1 
      1 /*	$NetBSD: sethostent.c,v 1.16.36.1 2012/04/17 00:05:21 yamt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1985, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char sccsid[] = "@(#)sethostent.c	8.1 (Berkeley) 6/4/93";
     36 static char rcsid[] = "Id: sethostent.c,v 8.5 1996/09/28 06:51:07 vixie Exp ";
     37 #else
     38 __RCSID("$NetBSD: sethostent.c,v 1.16.36.1 2012/04/17 00:05:21 yamt Exp $");
     39 #endif
     40 #endif /* LIBC_SCCS and not lint */
     41 
     42 #include "namespace.h"
     43 #include <sys/param.h>
     44 #include <netinet/in.h>
     45 #include <arpa/nameser.h>
     46 #include <netdb.h>
     47 #include <resolv.h>
     48 
     49 #ifdef __weak_alias
     50 __weak_alias(sethostent,_sethostent)
     51 __weak_alias(endhostent,_endhostent)
     52 #endif
     53 
     54 void	_endhtent(void);
     55 #ifndef _REENTRANT
     56 void	res_close(void);
     57 #endif
     58 void	_sethtent(int);
     59 
     60 void
     61 /*ARGSUSED*/
     62 sethostent(int stayopen)
     63 {
     64 #ifndef _REENTRANT
     65 	if ((_res.options & RES_INIT) == 0 && res_init() == -1)
     66 		return;
     67 	if (stayopen)
     68 		_res.options |= RES_STAYOPEN | RES_USEVC;
     69 #endif
     70 	_sethtent(stayopen);
     71 }
     72 
     73 void
     74 endhostent(void)
     75 {
     76 #ifndef _REENTRANT
     77 	_res.options &= ~(RES_STAYOPEN | RES_USEVC);
     78 	res_close();
     79 #endif
     80 	_endhtent();
     81 }
     82