1 /* $OpenBSD: domainname.c,v 1.10 2016/02/01 22:26:39 gsoares Exp $ */
2 /* $NetBSD: domainname.c,v 1.7 1995/03/21 09:04:22 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <err.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <limits.h>
39
40 extern char *__progname;
41
42 static void __dead usage(void);
43
44 int
main(int argc,char * argv[])45 main(int argc, char *argv[])
46 {
47 int ch;
48 char domainname[HOST_NAME_MAX+1];
49
50 while ((ch = getopt(argc, argv, "")) != -1)
51 switch (ch) {
52 default:
53 usage();
54 }
55 argc -= optind;
56 argv += optind;
57
58 if (argc > 1)
59 usage();
60
61 if (*argv) {
62 if (setdomainname(*argv, strlen(*argv)))
63 err(1, "setdomainname");
64 } else {
65 if (getdomainname(domainname, sizeof(domainname)))
66 err(1, "getdomainname");
67 (void)printf("%s\n", domainname);
68 }
69 return(0);
70 }
71
72 static void __dead
usage(void)73 usage(void)
74 {
75 (void)fprintf(stderr, "usage: %s [name-of-domain]\n", __progname);
76 exit(1);
77 }
78