[openssh.git] / openbsd-compat / daemon.c

/*	$OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */
/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */

#include "includes.h"

#ifndef HAVE_DAEMON

int
daemon(int nochdir, int noclose)
{
	int fd;

	switch (fork()) {
	case -1:
		return (-1);
	case 0:
#ifdef HAVE_CYGWIN
		register_9x_service();
#endif
		break;
	default:
#ifdef HAVE_CYGWIN
		/*
		 * This sleep avoids a race condition which kills the
		 * child process if parent is started by a NT/W2K service.
		 */
		sleep(1);
#endif
		_exit(0);
	}

	if (setsid() == -1)
		return (-1);

	if (!nochdir)
		(void)chdir("/");

	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
		(void)dup2(fd, STDIN_FILENO);
		(void)dup2(fd, STDOUT_FILENO);
		(void)dup2(fd, STDERR_FILENO);
		if (fd > 2)
			(void)close (fd);
	}
	return (0);
}

#endif /* !HAVE_DAEMON */
Commit	Line	Data
fc1c42f3	1	/* $OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */
beb43d31	2	/*-
	3	* Copyright (c) 1990, 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
3e67f7df	14	* 3. Neither the name of the University nor the names of its contributors
beb43d31	15	* may be used to endorse or promote products derived from this software
	16	* without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
f6d4fb87	31	/* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */
f6d4fb87	32
0b65b628	33	#include "includes.h"
beb43d31	34
	35	#ifndef HAVE_DAEMON
	36
beb43d31	37	int
510a42ce	38	daemon(int nochdir, int noclose)
beb43d31	39	{
	40	int fd;
	41
	42	switch (fork()) {
	43	case -1:
	44	return (-1);
	45	case 0:
ffb8d130	46	#ifdef HAVE_CYGWIN
	47	register_9x_service();
	48	#endif
beb43d31	49	break;
beb43d31	50	default:
3c62e7eb	51	#ifdef HAVE_CYGWIN
	52	/*
	53	* This sleep avoids a race condition which kills the
	54	* child process if parent is started by a NT/W2K service.
	55	*/
	56	sleep(1);
	57	#endif
beb43d31	58	_exit(0);
	59	}
	60
	61	if (setsid() == -1)
	62	return (-1);
	63
	64	if (!nochdir)
	65	(void)chdir("/");
	66
	67	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
	68	(void)dup2(fd, STDIN_FILENO);
	69	(void)dup2(fd, STDOUT_FILENO);
	70	(void)dup2(fd, STDERR_FILENO);
	71	if (fd > 2)
	72	(void)close (fd);
	73	}
	74	return (0);
	75	}
	76
	77	#endif /* !HAVE_DAEMON */
	78