getprotoname.c revision 1.7
1/* $OpenBSD: getprotoname.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#include <string.h> 34 35int 36getprotobyname_r(const char *name, struct protoent *pe, 37 struct protoent_data *pd) 38{ 39 char **cp; 40 int error; 41 42 setprotoent_r(pd->stayopen, pd); 43 while ((error = getprotoent_r(pe, pd)) == 0) { 44 if (strcmp(pe->p_name, name) == 0) 45 break; 46 for (cp = pe->p_aliases; *cp != 0; cp++) 47 if (strcmp(*cp, name) == 0) 48 goto found; 49 } 50found: 51 if (!pd->stayopen && pd->fp != NULL) { 52 fclose(pd->fp); 53 pd->fp = NULL; 54 } 55 return (error); 56} 57 58struct protoent * 59getprotobyname(const char *name) 60{ 61 extern struct protoent_data _protoent_data; 62 static struct protoent proto; 63 64 if (getprotobyname_r(name, &proto, &_protoent_data) != 0) 65 return (NULL); 66 return (&proto); 67} 68