1 /* $NetBSD: getservbyname.c,v 1.10 2003/08/07 16:43:09 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 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[] = "@(#)getservbyname.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getservbyname.c,v 1.10 2003/08/07 16:43:09 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <assert.h> 43 #include <netdb.h> 44 #include <string.h> 45 46 #ifdef __weak_alias 47 __weak_alias(getservbyname,_getservbyname) 48 #endif 49 50 extern int _serv_stayopen; 51 52 struct servent * 53 getservbyname(name, proto) 54 const char *name, *proto; 55 { 56 register struct servent *p; 57 register char **cp; 58 59 _DIAGASSERT(name != NULL); 60 /* proto may be NULL */ 61 62 setservent(_serv_stayopen); 63 while ((p = getservent()) != NULL) { 64 if (strcmp(name, p->s_name) == 0) 65 goto gotname; 66 for (cp = p->s_aliases; *cp; cp++) 67 if (strcmp(name, *cp) == 0) 68 goto gotname; 69 continue; 70 gotname: 71 if (proto == 0 || strcmp(p->s_proto, proto) == 0) 72 break; 73 } 74 if (!_serv_stayopen) 75 endservent(); 76 return (p); 77 } 78