1 /* $OpenBSD: getproto.c,v 1.8 2015/09/14 07:38:38 guenther 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
getprotobynumber_r(int num,struct protoent * pe,struct protoent_data * pd)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 DEF_WEAK(getprotobynumber_r);
50
51 struct protoent *
getprotobynumber(int num)52 getprotobynumber(int num)
53 {
54 extern struct protoent_data _protoent_data;
55 static struct protoent proto;
56
57 if (getprotobynumber_r(num, &proto, &_protoent_data) != 0)
58 return (NULL);
59 return (&proto);
60 }
61