2 * Copyright (c) 1999 Berkeley Software Design, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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
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
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28 * From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/types.h>
42 static void usage(void);
45 main(int argc, char *argv[])
47 int ch, nochdir, noclose, errcode;
51 nochdir = noclose = 1;
53 while ((ch = getopt(argc, argv, "-cfp:")) != -1) {
74 * Try to open the pidfile before calling daemon(3),
75 * to be able to report the error intelligently
78 pidf = fopen(pidfile, "w");
80 err(2, "pidfile ``%s''", pidfile);
83 if (daemon(nochdir, noclose) == -1)
86 /* Now that we are the child, write out the pid */
88 fprintf(pidf, "%lu\n", (unsigned long)getpid());
92 execvp(argv[0], argv);
95 * execvp() failed -- unlink pidfile if any, and
98 errcode = errno; /* Preserve errcode -- unlink may reset it */
102 /* The child is now running, so the exit status doesn't matter. */
103 errc(1, errcode, "%s", argv[0]);
109 (void)fprintf(stderr,
110 "usage: daemon [-cf] [-p pidfile] command arguments ...\n");