lib/ip/getsrvbyname.c

   1 /*
   2  * Copyright (c) 1983 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that: (1) source distributions retain this entire copyright
   7  * notice and comment, and (2) distributions including binaries display
   8  * the following acknowledgement:  ``This product includes software
   9  * developed by the University of California, Berkeley and its contributors''
  10  * in the documentation or other materials provided with the distribution
  11  * and in all advertising materials mentioning features or use of this
  12  * software. Neither the name of the University nor the names of its
  13  * contributors may be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  */
  19
  20 #if defined(LIBC_SCCS) && !defined(lint)
  21 static char sccsid[] = "@(#)getservbyname.c     5.6 (Berkeley) 6/1/90";
  22 #endif /* LIBC_SCCS and not lint */
  23
  24 #include <string.h>
  25
  26 #include <net/gen/netdb.h>
  27
  28 extern int _serv_stayopen;
  29
  30 struct servent *
  31 getservbyname(name, proto)
  32         const char *name, *proto;
  33 {
  34         register struct servent *p;
  35         register char **cp;
  36
  37         setservent(_serv_stayopen);
  38         while (p = getservent()) {
  39                 if (strcmp(name, p->s_name) == 0)
  40                         goto gotname;
  41                 for (cp = p->s_aliases; *cp; cp++)
  42                         if (strcmp(name, *cp) == 0)
  43                                 goto gotname;
  44                 continue;
  45 gotname:
  46                 if (proto == 0 || strcmp(p->s_proto, proto) == 0)
  47                         break;
  48         }
  49         if (!_serv_stayopen)
  50                 endservent();
  51         return (p);
  52 }