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getservbyname.c revision 1.2 
      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, 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[] = "from: @(#)getservbyname.c	5.7 (Berkeley) 2/24/91";*/
     36 static char rcsid[] = "$Id: getservbyname.c,v 1.2 1993/08/01 18:39:44 mycroft Exp $";
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #include <netdb.h>
     40 #include <string.h>
     41 
     42 extern int _serv_stayopen;
     43 
     44 struct servent *
     45 getservbyname(name, proto)
     46 	const char *name, *proto;
     47 {
     48 	register struct servent *p;
     49 	register char **cp;
     50 
     51 	setservent(_serv_stayopen);
     52 	while (p = getservent()) {
     53 		if (strcmp(name, p->s_name) == 0)
     54 			goto gotname;
     55 		for (cp = p->s_aliases; *cp; cp++)
     56 			if (strcmp(name, *cp) == 0)
     57 				goto gotname;
     58 		continue;
     59 gotname:
     60 		if (proto == 0 || strcmp(p->s_proto, proto) == 0)
     61 			break;
     62 	}
     63 	if (!_serv_stayopen)
     64 		endservent();
     65 	return (p);
     66 }
     67