xref: /freebsd/contrib/netbsd-tests/lib/libc/net/h_servent.c (revision 9268022b74279434ed6300244e3f977e56a8ceb5)
1 /* $NetBSD: h_servent.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 servent * svp)38 pserv(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 
49 static void
usage(void)50 usage(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 
59 int
main(int argc,char * argv[])60 main(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