1/* $NetBSD: h_servent.c,v 1.1 2011/01/12 17:32:27 pgoyette 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
37static void
38pserv(const struct servent *svp)
39{
40	char **pp;
41
42	printf("name=%s, port=%d, proto=%s, aliases=",
43	    svp->s_name, ntohs((uint16_t)svp->s_port), svp->s_proto);
44	for (pp = svp->s_aliases; *pp; pp++)
45		printf("%s ", *pp);
46	printf("\n");
47}
48
49static void
50usage(void)
51{
52	(void)fprintf(stderr, "Usage: %s\n"
53	    "\t%s -p <port> [-P <proto>]\n"
54	    "\t%s -n <name> [-P <proto>]\n", getprogname(), getprogname(),
55	    getprogname());
56	exit(1);
57}
58
59int
60main(int argc, char *argv[])
61{
62	struct servent *svp;
63	const char *port = NULL, *proto = NULL, *name = NULL;
64	int c;
65
66	while ((c = getopt(argc, argv, "p:n:P:")) != -1) {
67		switch (c) {
68		case 'n':
69			name = optarg;
70			break;
71		case 'p':
72			port = optarg;
73			break;
74		case 'P':
75			proto = optarg;
76			break;
77		default:
78			usage();
79		}
80	}
81
82	if (port && name)
83		usage();
84	if (port) {
85		if ((svp = getservbyport(htons(atoi(port)), proto)) != NULL)
86			pserv(svp);
87		return 0;
88	}
89	if (name) {
90		if ((svp = getservbyname(name, proto)) != NULL)
91			pserv(svp);
92		return 0;
93	}
94
95	setservent(0);
96	while ((svp = getservent()) != NULL)
97		pserv(svp);
98	endservent();
99	return 0;
100}
101