1 /* $NetBSD: h_protoent.c,v 1.2 2011/04/07 18:14:09 jruoho Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <netdb.h>
30 #include <stdint.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <netinet/in.h>
34 #include <sys/types.h>
35 #include <stdio.h>
36
37 static void
pserv(const struct protoent * prp)38 pserv(const struct protoent *prp)
39 {
40 char **pp;
41
42 printf("name=%s, proto=%d, aliases=",
43 prp->p_name, prp->p_proto);
44 for (pp = prp->p_aliases; *pp; pp++)
45 printf("%s ", *pp);
46 printf("\n");
47 }
48
49 static void
usage(void)50 usage(void)
51 {
52 (void)fprintf(stderr, "Usage: %s\n"
53 "\t%s -p <proto>\n"
54 "\t%s -n <name>\n", getprogname(), getprogname(),
55 getprogname());
56 exit(1);
57 }
58
59 int
main(int argc,char * argv[])60 main(int argc, char *argv[])
61 {
62 struct protoent *prp;
63 const char *proto = NULL, *name = NULL;
64 int c;
65
66 while ((c = getopt(argc, argv, "p:n:")) != -1) {
67 switch (c) {
68 case 'n':
69 name = optarg;
70 break;
71 case 'p':
72 proto = optarg;
73 break;
74 default:
75 usage();
76 }
77 }
78
79 if (proto && name)
80 usage();
81 if (proto) {
82 if ((prp = getprotobynumber(atoi(proto))) != NULL)
83 pserv(prp);
84 return 0;
85 }
86 if (name) {
87 if ((prp = getprotobyname(name)) != NULL)
88 pserv(prp);
89 return 0;
90 }
91
92 setprotoent(0);
93 while ((prp = getprotoent()) != NULL)
94 pserv(prp);
95 endprotoent();
96 return 0;
97 }
98