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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char rcsid[] = "$OpenBSD: getservbyname.c,v 1.6 2003/06/02 20:18:35 millert Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 #include <netdb.h> 35 #include <string.h> 36 #include "thread_private.h" 37 38 extern int _serv_stayopen; 39 40 _THREAD_PRIVATE_MUTEX(getservbyname_r); 41 42 struct servent * 43 getservbyname_r(name, proto, se, buf, buflen) 44 const char *name, *proto; 45 struct servent *se; 46 char *buf; 47 int buflen; 48 { 49 register struct servent *p; 50 register char **cp; 51 52 _THREAD_PRIVATE_MUTEX_LOCK(getservbyname_r); 53 setservent(_serv_stayopen); 54 while ((p = getservent())) { 55 if (strcmp(name, p->s_name) == 0) 56 goto gotname; 57 for (cp = p->s_aliases; *cp; cp++) 58 if (strcmp(name, *cp) == 0) 59 goto gotname; 60 continue; 61 gotname: 62 if (proto == 0 || strcmp(p->s_proto, proto) == 0) 63 break; 64 } 65 if (!_serv_stayopen) 66 endservent(); 67 _THREAD_PRIVATE_MUTEX_UNLOCK(getservbyname_r); 68 return (p); 69 } 70 71 struct servent *getservbyname(name, proto) 72 const char *name, *proto; 73 { 74 _THREAD_PRIVATE_KEY(getservbyname); 75 static char buf[4096]; 76 char *bufp = (char*)_THREAD_PRIVATE(getservbyname, buf, NULL); 77 78 if (bufp == NULL) 79 return (NULL); 80 return getservbyname_r(name, proto, (struct servent*) bufp, 81 bufp + sizeof(struct servent), 82 sizeof buf - sizeof(struct servent) ); 83 } 84