/* $OpenBSD: hostname.c,v 1.6 2002/07/04 04:26:40 deraadt Exp $ */ /* $NetBSD: hostname.c,v 1.10 1995/09/07 06:28:40 jtc Exp $ */ /* * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)hostname.c 8.2 (Berkeley) 4/28/95"; #else static char rcsid[] = "$OpenBSD: hostname.c,v 1.6 2002/07/04 04:26:40 deraadt Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <err.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> extern char *__progname; void usage(void); int main(int argc, char *argv[]) { int ch, sflag; char *p, hostname[MAXHOSTNAMELEN]; sflag = 0; while ((ch = getopt(argc, argv, "s")) != -1) switch (ch) { case 's': sflag = 1; break; default: usage(); } argc -= optind; argv += optind; if (argc > 1) usage(); if (*argv) { if (sethostname(*argv, strlen(*argv))) err(1, "sethostname"); } else { if (gethostname(hostname, sizeof(hostname))) err(1, "gethostname"); if (sflag && (p = strchr(hostname, '.'))) *p = '\0'; (void)printf("%s\n", hostname); } exit(0); } void usage(void) { (void)fprintf(stderr, "usage: %s [-s] [name-of-host]\n", __progname); exit(1); }