resolv/getnetbyname.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)getnetbyname.c      8.1 (Berkeley) 6/4/93";
  36 static char sccsid_[] = "from getnetbyname.c    1.1 (Coimbra) 93/06/02";
  37 static char rcsid[] = "$Id$";
  38 #endif /* LIBC_SCCS and not lint */
  39
  40 #include <netdb.h>
  41 #include <string.h>
  42
  43 extern int _net_stayopen;
  44
  45 struct netent *
  46 _getnetbyname(name)
  47 #if (defined(sun) || defined(DGUX))
  48         register char *name;
  49 #else
  50         register const char *name;
  51 #endif
  52 {
  53         register struct netent *p;
  54         register char **cp;
  55
  56         setnetent(_net_stayopen);
  57         while (p = getnetent()) {
  58                 if (strcasecmp(p->n_name, name) == 0)
  59                         break;
  60                 for (cp = p->n_aliases; *cp != 0; cp++)
  61                         if (strcasecmp(*cp, name) == 0)
  62                                 goto found;
  63         }
  64 found:
  65         if (!_net_stayopen)
  66                 endnetent();
  67         return (p);
  68 }