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
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
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
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