getprotoname.c revision 1.6
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) 31static char rcsid[] = "$OpenBSD: getprotoname.c,v 1.6 2004/10/25 03:09:01 millert Exp $"; 32#endif /* LIBC_SCCS and not lint */ 33 34#include <netdb.h> 35#include <stdio.h> 36#include <string.h> 37 38int 39getprotobyname_r(const char *name, struct protoent *pe, 40 struct protoent_data *pd) 41{ 42 char **cp; 43 int error; 44 45 setprotoent_r(pd->stayopen, pd); 46 while ((error = getprotoent_r(pe, pd)) == 0) { 47 if (strcmp(pe->p_name, name) == 0) 48 break; 49 for (cp = pe->p_aliases; *cp != 0; cp++) 50 if (strcmp(*cp, name) == 0) 51 goto found; 52 } 53found: 54 if (!pd->stayopen && pd->fp != NULL) { 55 fclose(pd->fp); 56 pd->fp = NULL; 57 } 58 return (error); 59} 60 61struct protoent * 62getprotobyname(const char *name) 63{ 64 extern struct protoent_data _protoent_data; 65 static struct protoent proto; 66 67 if (getprotobyname_r(name, &proto, &_protoent_data) != 0) 68 return (NULL); 69 return (&proto); 70} 71