1 /* $NetBSD: domainname.c,v 1.15 2011/08/29 14:51:18 joerg 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\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)hostname.c 8.1 (Berkeley) 5/31/93"; 41 #else 42 __RCSID("$NetBSD: domainname.c,v 1.15 2011/08/29 14:51:18 joerg 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 54 __dead static void usage(void); 55 56 int 57 main(int argc, char *argv[]) 58 { 59 int ch; 60 char domainname[MAXHOSTNAMELEN]; 61 62 setprogname(argv[0]); 63 64 while ((ch = getopt(argc, argv, "")) != -1) { 65 switch (ch) { 66 case '?': 67 default: 68 usage(); 69 /* NOTREACHED */ 70 } 71 } 72 argc -= optind; 73 argv += optind; 74 75 if (argc > 1) 76 usage(); 77 78 if (*argv) { 79 if (setdomainname(*argv, strlen(*argv))) 80 err(1, "setdomainname"); 81 } else { 82 if (getdomainname(domainname, sizeof(domainname))) 83 err(1, "getdomainname"); 84 (void)printf("%s\n", domainname); 85 } 86 exit(EXIT_SUCCESS); 87 /* NOTREACHED */ 88 } 89 90 static void 91 usage(void) 92 { 93 (void)fprintf(stderr, "usage: %s [name-of-domain]\n", getprogname()); 94 exit(EXIT_FAILURE); 95 } 96