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 rcsid[] = "$OpenBSD: getservbyname.c,v 1.4 1998/11/20 11:18:44 d Exp $"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <netdb.h> 39 #include <string.h> 40 #include "thread_private.h" 41 42 extern int _serv_stayopen; 43 44 _THREAD_PRIVATE_MUTEX(getservbyname_r) 45 46 struct servent * 47 getservbyname_r(name, proto, se, buf, buflen) 48 const char *name, *proto; 49 struct servent *se; 50 char *buf; 51 int buflen; 52 { 53 register struct servent *p; 54 register char **cp; 55 56 _THREAD_PRIVATE_MUTEX_LOCK(getservbyname_r); 57 setservent(_serv_stayopen); 58 while ((p = getservent())) { 59 if (strcmp(name, p->s_name) == 0) 60 goto gotname; 61 for (cp = p->s_aliases; *cp; cp++) 62 if (strcmp(name, *cp) == 0) 63 goto gotname; 64 continue; 65 gotname: 66 if (proto == 0 || strcmp(p->s_proto, proto) == 0) 67 break; 68 } 69 if (!_serv_stayopen) 70 endservent(); 71 _THREAD_PRIVATE_MUTEX_UNLOCK(getservbyname_r); 72 return (p); 73 } 74 75 struct servent *getservbyname(name, proto) 76 const char *name, *proto; 77 { 78 _THREAD_PRIVATE_KEY(getservbyname) 79 static char buf[4096]; 80 char *bufp = (char*)_THREAD_PRIVATE(getservbyname, buf, NULL); 81 82 if (bufp == NULL) 83 return (NULL); 84 return getservbyname_r(name, proto, (struct servent*) bufp, 85 bufp + sizeof(struct servent), 86 sizeof buf - sizeof(struct servent) ); 87 } 88