domainname.c revision 1.9 
1/*	$NetBSD: domainname.c,v 1.9 1997/11/05 21:20:16 cgd 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#ifndef lint
38__COPYRIGHT(
39"@(#) Copyright (c) 1988, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n");
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)hostname.c	8.1 (Berkeley) 5/31/93";
46#else
47__RCSID("$NetBSD: domainname.c,v 1.9 1997/11/05 21:20:16 cgd Exp $");
48#endif
49#endif /* not lint */
50
51#include <sys/param.h>
52
53#include <err.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <unistd.h>
58
59int main __P((int, char *[]));
60void usage __P((void));
61
62int
63main(argc, argv)
64	int argc;
65	char *argv[];
66{
67	int ch;
68	char domainname[MAXHOSTNAMELEN];
69
70	while ((ch = getopt(argc, argv, "")) != -1)
71		switch (ch) {
72		case '?':
73		default:
74			usage();
75		}
76	argc -= optind;
77	argv += optind;
78
79	if (argc > 1)
80		usage();
81
82	if (*argv) {
83		if (setdomainname(*argv, (int)strlen(*argv)))
84			err(1, "setdomainname");
85	} else {
86		if (getdomainname(domainname, sizeof(domainname)))
87			err(1, "getdomainname");
88		(void)printf("%s\n", domainname);
89	}
90	exit(0);
91	/* NOTREACHED */
92}
93
94void
95usage()
96{
97
98	(void)fprintf(stderr, "usage: domainname [name-of-domain]\n");
99	exit(1);
100}
101