lib/libc/net/sethostent.c

   1 /*      $NetBSD: sethostent.c,v 1.17 2012/03/20 17:44:18 matt 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 1.17 2012/03/20 17:44:18 matt 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 }