domainname.c revision 1.2 
1/*	$OpenBSD: domainname.c,v 1.2 1996/06/23 14:19:54 deraadt 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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char 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
47static char rcsid[] = "$OpenBSD: domainname.c,v 1.2 1996/06/23 14:19:54 deraadt 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
59void usage __P((void));
60
61int
62main(argc, argv)
63	int argc;
64	char *argv[];
65{
66	int ch;
67	char domainname[MAXHOSTNAMELEN];
68
69	while ((ch = getopt(argc, argv, "")) != -1)
70		switch (ch) {
71		case '?':
72		default:
73			usage();
74		}
75	argc -= optind;
76	argv += optind;
77
78	if (argc > 1)
79		usage();
80
81	if (*argv) {
82		if (setdomainname(*argv, strlen(*argv)))
83			err(1, "setdomainname");
84	} else {
85		if (getdomainname(domainname, sizeof(domainname)))
86			err(1, "getdomainname");
87		(void)printf("%s\n", domainname);
88	}
89	exit(0);
90}
91
92void
93usage()
94{
95
96	(void)fprintf(stderr, "usage: domainname [name-of-domain]\n");
97	exit(1);
98}
99