1/*	$NetBSD$	*/
2
3#if defined(LIBC_SCCS) && !defined(lint)
4static const char sccsid[] = "@(#)daemon.c	8.1 (Berkeley) 6/4/93";
5static const char rcsid[] = "Id: daemon.c,v 1.2 2005/04/27 04:56:10 sra Exp ";
6#endif /* LIBC_SCCS and not lint */
7
8/*
9 * Copyright (c) 1990, 1993
10 *	The Regents of the University of California.  All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by the University of
23 *	California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41#include "port_before.h"
42
43#include <fcntl.h>
44#include <paths.h>
45#include <unistd.h>
46
47#include "port_after.h"
48
49#ifndef NEED_DAEMON
50int __bind_daemon__;
51#else
52
53int
54daemon(int nochdir, int noclose) {
55	int fd;
56
57	switch (fork()) {
58	case -1:
59		return (-1);
60	case 0:
61		break;
62	default:
63		_exit(0);
64	}
65
66	if (setsid() == -1)
67		return (-1);
68
69	if (!nochdir)
70		(void)chdir("/");
71
72	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
73		(void)dup2(fd, STDIN_FILENO);
74		(void)dup2(fd, STDOUT_FILENO);
75		(void)dup2(fd, STDERR_FILENO);
76		if (fd > 2)
77			(void)close (fd);
78	}
79	return (0);
80}
81#endif
82
83/*! \file */
84