StdLib/BsdSocketLib/getservbyname.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 #if defined(LIBC_SCCS) && !defined(lint)
  34 static char sccsid[] = "@(#)getservbyname.c     8.1 (Berkeley) 6/4/93";
  35 #endif /* LIBC_SCCS and not lint */
  36
  37 #include <netdb.h>
  38 #include <string.h>
  39
  40 extern int _serv_stayopen;
  41
  42 struct servent *
  43 getservbyname(IN const char *name, IN const char *proto)
  44 {
  45         register struct servent *p;
  46         register char **cp;
  47
  48 #ifdef YP
  49         extern char *___getservbyname_yp;
  50         extern char *___getservbyproto_yp;
  51
  52         ___getservbyname_yp = (char *)name;
  53         ___getservbyproto_yp = (char *)proto;
  54 #endif
  55
  56         setservent(_serv_stayopen);
  57         while ( NULL != (p = getservent()) ) {
  58                 if (strcmp(name, p->s_name) == 0)
  59                         goto gotname;
  60                 for (cp = p->s_aliases; *cp; cp++)
  61                         if (strcmp(name, *cp) == 0)
  62                                 goto gotname;
  63                 continue;
  64 gotname:
  65                 if (proto == 0 || strcmp(p->s_proto, proto) == 0)
  66                         break;
  67         }
  68         if (!_serv_stayopen)
  69                 endservent();
  70
  71 #ifdef YP
  72         ___getservbyname_yp = NULL;
  73         ___getservbyproto_yp = NULL;
  74 #endif
  75
  76         return (p);
  77 }