1 /* $OpenBSD: domainname.c,v 1.8 2009/10/27 23:59:21 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. 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 <sys/param.h> 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 extern char *__progname; 42 43 void usage(void); 44 45 int 46 main(int argc, char *argv[]) 47 { 48 int ch; 49 char domainname[MAXHOSTNAMELEN]; 50 51 while ((ch = getopt(argc, argv, "")) != -1) 52 switch (ch) { 53 default: 54 usage(); 55 } 56 argc -= optind; 57 argv += optind; 58 59 if (argc > 1) 60 usage(); 61 62 if (*argv) { 63 if (setdomainname(*argv, strlen(*argv))) 64 err(1, "setdomainname"); 65 } else { 66 if (getdomainname(domainname, sizeof(domainname))) 67 err(1, "getdomainname"); 68 (void)printf("%s\n", domainname); 69 } 70 exit(0); 71 } 72 73 void 74 usage(void) 75 { 76 (void)fprintf(stderr, "usage: %s [name-of-domain]\n", __progname); 77 exit(1); 78 } 79