1 /* $OpenBSD: getproto.c,v 1.7 2005/08/06 20:30:03 espie Exp $ */ 2 /* 3 * Copyright (c) 1983, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <netdb.h> 32 #include <stdio.h> 33 34 int 35 getprotobynumber_r(int num, struct protoent *pe, struct protoent_data *pd) 36 { 37 int error; 38 39 setprotoent_r(pd->stayopen, pd); 40 while ((error = getprotoent_r(pe, pd)) == 0) 41 if (pe->p_proto == num) 42 break; 43 if (!pd->stayopen && pd->fp != NULL) { 44 (void)fclose(pd->fp); 45 pd->fp = NULL; 46 } 47 return (error); 48 } 49 50 struct protoent * 51 getprotobynumber(int num) 52 { 53 extern struct protoent_data _protoent_data; 54 static struct protoent proto; 55 56 if (getprotobynumber_r(num, &proto, &_protoent_data) != 0) 57 return (NULL); 58 return (&proto); 59 } 60