domainname.c revision 1.12 
1/*	$NetBSD: domainname.c,v 1.12 2003/08/07 09:05:12 agc Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1993
5 *	The Regents of the University of California.  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 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
35	The Regents of the University of California.  All rights reserved.\n");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)hostname.c	8.1 (Berkeley) 5/31/93";
41#else
42__RCSID("$NetBSD: domainname.c,v 1.12 2003/08/07 09:05:12 agc Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/param.h>
47
48#include <err.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <unistd.h>
53
54void usage __P((void));
55int main __P((int, char *[]));
56
57int
58main(argc, argv)
59	int argc;
60	char *argv[];
61{
62	int ch;
63	char domainname[MAXHOSTNAMELEN];
64
65	while ((ch = getopt(argc, argv, "")) != -1)
66		switch (ch) {
67		case '?':
68		default:
69			usage();
70		}
71	argc -= optind;
72	argv += optind;
73
74	if (argc > 1)
75		usage();
76
77	if (*argv) {
78		if (setdomainname(*argv, strlen(*argv)))
79			err(1, "setdomainname");
80	} else {
81		if (getdomainname(domainname, sizeof(domainname)))
82			err(1, "getdomainname");
83		(void)printf("%s\n", domainname);
84	}
85	exit(0);
86	/* NOTREACHED */
87}
88
89void
90usage()
91{
92
93	(void)fprintf(stderr, "usage: domainname [name-of-domain]\n");
94	exit(1);
95	/* NOTREACHED */
96}
97