1 /*- 2 * Copyright (c) 1999 Berkeley Software Design, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Berkeley Software Design Inc's name may not be used to endorse or 13 * promote products derived from this software without specific prior 14 * written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp 29 * $FreeBSD: src/usr.sbin/daemon/daemon.c,v 1.1.2.1 2002/08/28 17:25:54 sheldonh Exp $ 30 * $DragonFly: src/usr.sbin/daemon/daemon.c,v 1.2 2003/06/17 04:29:53 dillon Exp $ 31 */ 32 33 #include <sys/types.h> 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 40 static void usage(void); 41 42 int 43 main(int argc, char *argv[]) 44 { 45 int ch, nochdir, noclose; 46 47 nochdir = noclose = 1; 48 while ((ch = getopt(argc, argv, "-cf")) != -1) { 49 switch (ch) { 50 case 'c': 51 nochdir = 0; 52 break; 53 case 'f': 54 noclose = 0; 55 break; 56 case '?': 57 default: 58 usage(); 59 } 60 } 61 argc -= optind; 62 argv += optind; 63 64 if (argc == 0) 65 usage(); 66 if (daemon(nochdir, noclose) == -1) 67 err(1, NULL); 68 execvp(argv[0], argv); 69 70 /* The child is now running, so the exit status doesn't matter. */ 71 err(1, "%s", argv[0]); 72 } 73 74 static void 75 usage(void) 76 { 77 (void)fprintf(stderr, "usage: daemon [-cf] command arguments ...\n"); 78 exit(1); 79 } 80