1157016Sdes/*	$OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */
298937Sdes/*-
398937Sdes * Copyright (c) 1990, 1993
498937Sdes *	The Regents of the University of California.  All rights reserved.
598937Sdes *
698937Sdes * Redistribution and use in source and binary forms, with or without
798937Sdes * modification, are permitted provided that the following conditions
898937Sdes * are met:
998937Sdes * 1. Redistributions of source code must retain the above copyright
1098937Sdes *    notice, this list of conditions and the following disclaimer.
1198937Sdes * 2. Redistributions in binary form must reproduce the above copyright
1298937Sdes *    notice, this list of conditions and the following disclaimer in the
1398937Sdes *    documentation and/or other materials provided with the distribution.
14124208Sdes * 3. Neither the name of the University nor the names of its contributors
1598937Sdes *    may be used to endorse or promote products derived from this software
1698937Sdes *    without specific prior written permission.
1798937Sdes *
1898937Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1998937Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2098937Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2198937Sdes * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2298937Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2398937Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2498937Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2598937Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2698937Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2798937Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2898937Sdes * SUCH DAMAGE.
2998937Sdes */
3098937Sdes
31157016Sdes/* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */
32157016Sdes
3398937Sdes#include "includes.h"
3498937Sdes
3598937Sdes#ifndef HAVE_DAEMON
3698937Sdes
37162852Sdes#include <sys/types.h>
38162852Sdes
39162852Sdes#ifdef HAVE_SYS_STAT_H
40162852Sdes# include <sys/stat.h>
41162852Sdes#endif
42162852Sdes
43162852Sdes#ifdef HAVE_FCNTL_H
44162852Sdes# include <fcntl.h>
45162852Sdes#endif
46162852Sdes
47162852Sdes#ifdef HAVE_UNISTD_H
48162852Sdes# include <unistd.h>
49162852Sdes#endif
50162852Sdes
5198937Sdesint
52124208Sdesdaemon(int nochdir, int noclose)
5398937Sdes{
5498937Sdes	int fd;
5598937Sdes
5698937Sdes	switch (fork()) {
5798937Sdes	case -1:
5898937Sdes		return (-1);
5998937Sdes	case 0:
6098937Sdes		break;
6198937Sdes	default:
6298937Sdes		_exit(0);
6398937Sdes	}
6498937Sdes
6598937Sdes	if (setsid() == -1)
6698937Sdes		return (-1);
6798937Sdes
6898937Sdes	if (!nochdir)
6998937Sdes		(void)chdir("/");
7098937Sdes
7198937Sdes	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
7298937Sdes		(void)dup2(fd, STDIN_FILENO);
7398937Sdes		(void)dup2(fd, STDOUT_FILENO);
7498937Sdes		(void)dup2(fd, STDERR_FILENO);
7598937Sdes		if (fd > 2)
7698937Sdes			(void)close (fd);
7798937Sdes	}
7898937Sdes	return (0);
7998937Sdes}
8098937Sdes
8198937Sdes#endif /* !HAVE_DAEMON */
8298937Sdes
83