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 * $FreeBSD$ 30 */ 31 32 #include <sys/types.h> 33 34 #include <err.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 static void usage(void); 40 41 int 42 main(int argc, char *argv[]) 43 { 44 int ch, nochdir, noclose; 45 46 nochdir = noclose = 1; 47 while ((ch = getopt(argc, argv, "-cf")) != -1) { 48 switch (ch) { 49 case 'c': 50 nochdir = 0; 51 break; 52 case 'f': 53 noclose = 0; 54 break; 55 case '?': 56 default: 57 usage(); 58 } 59 } 60 argc -= optind; 61 argv += optind; 62 63 if (argc == 0) 64 usage(); 65 if (daemon(nochdir, noclose) == -1) 66 err(1, NULL); 67 execvp(argv[0], argv); 68 69 /* The child is now running, so the exit status doesn't matter. */ 70 err(1, "%s", argv[0]); 71 } 72 73 static void 74 usage(void) 75 { 76 (void)fprintf(stderr, "usage: daemon [-cf] command arguments ...\n"); 77 exit(1); 78 } 79