text: /*-
   * Copyright (c) 1988, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #if 0
  #ifndef lint
  static char const copyright[] =
  "@(#) Copyright (c) 1988, 1993\n\
  	The Regents of the University of California.  All rights reserved.\n";
  #endif /* not lint */
  
  #ifndef lint
  static char const sccsid[] = "From: @(#)hostname.c	8.1 (Berkeley) 5/31/93";
  #endif /* not lint */
  #endif
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/bin/domainname/domainname.c 139969 2005-01-10 08:39:26Z imp $");
  
  #include <sys/param.h>
  
  #include <err.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  static void usage(void);
  
  int
  main(int argc, char *argv[])
  {
  	int ch;
  	char domainname[MAXHOSTNAMELEN];
  
  	while ((ch = getopt(argc, argv, "")) != -1)
  		switch (ch) {
  		case '?':
  			/* fall through */
  		default:
  			usage();
  		}
  	argc -= optind;
  	argv += optind;
  
  	if (argc > 1)
  		usage();
  
  	if (*argv) {
  		if (setdomainname(*argv, (int)strlen(*argv)))
  			err(1, "setdomainname");
  	} else {
  		if (getdomainname(domainname, (int)sizeof(domainname)))
  			err(1, "getdomainname");
  		(void)printf("%s\n", domainname);
  	}
  	exit(0);
  }
  
  static void
  usage(void)
  {
  	(void)fprintf(stderr, "usage: domainname [ypdomain]\n");
  	exit(1);
  }
  