getprotoname.c revision 1.5 
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 1.5 2004/10/17 20:24:23 millert Exp $";
32#endif /* LIBC_SCCS and not lint */
33
34#include <netdb.h>
35#include <stdio.h>
36#include <string.h>
37
38struct protoent *
39getprotobyname_r(const char *name, struct protoent *pe,
40    struct protoent_data *pd)
41{
42	struct protoent *p;
43	char **cp;
44
45	setprotoent_r(pd->stayopen, pd);
46	while ((p = getprotoent_r(pe, pd))) {
47		if (strcmp(p->p_name, name) == 0)
48			break;
49		for (cp = p->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 (p);
59}
60
61struct protoent *
62getprotobyname(const char *name)
63{
64	extern struct protoent_data _protoent_data;
65	static struct protoent proto;
66
67	return getprotobyname_r(name, &proto, &_protoent_data);
68}
69