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