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

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

/*-
 * 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.
 */

#include "includes.h"

#ifndef HAVE_DAEMON

#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: daemon.c,v 1.5 2003/07/15 17:32:41 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

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
12408a1b	1	/* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */
12408a1b	2
3c0ef626	3	/*-
	4	* Copyright (c) 1990, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
0fff78ff	15	* 3. Neither the name of the University nor the names of its contributors
3c0ef626	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
	32	#include "includes.h"
	33
	34	#ifndef HAVE_DAEMON
	35
	36	#if defined(LIBC_SCCS) && !defined(lint)
0fff78ff	37	static char rcsid[] = "$OpenBSD: daemon.c,v 1.5 2003/07/15 17:32:41 deraadt Exp $";
3c0ef626	38	#endif /* LIBC_SCCS and not lint */
	39
	40	int
0fff78ff	41	daemon(int nochdir, int noclose)
3c0ef626	42	{
	43	int fd;
	44
	45	switch (fork()) {
	46	case -1:
	47	return (-1);
	48	case 0:
e9a17296	49	#ifdef HAVE_CYGWIN
	50	register_9x_service();
	51	#endif
3c0ef626	52	break;
	53	default:
	54	#ifdef HAVE_CYGWIN
	55	/*
	56	* This sleep avoids a race condition which kills the
	57	* child process if parent is started by a NT/W2K service.
	58	*/
	59	sleep(1);
	60	#endif
	61	_exit(0);
	62	}
	63
	64	if (setsid() == -1)
	65	return (-1);
	66
	67	if (!nochdir)
	68	(void)chdir("/");
	69
	70	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
	71	(void)dup2(fd, STDIN_FILENO);
	72	(void)dup2(fd, STDOUT_FILENO);
	73	(void)dup2(fd, STDERR_FILENO);
	74	if (fd > 2)
	75	(void)close (fd);
	76	}
	77	return (0);
	78	}
	79
	80	#endif /* !HAVE_DAEMON */
	81