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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2011 - David Sommerseth <davids@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#elif defined(_MSC_VER)
#include "config-msvc.h"
#endif
#ifndef HAVE_DAEMON
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
int
daemon(int nochdir, int noclose)
{
#if defined(HAVE_FORK) && defined(HAVE_SETSID)
switch (fork())
{
case -1:
return (-1);
case 0:
break;
default:
exit(0);
}
if (setsid() == -1)
{
return (-1);
}
if (!nochdir)
{
chdir("/");
}
if (!noclose)
{
#if defined(HAVE_DUP) && defined(HAVE_DUP2)
int fd;
if ((fd = open("/dev/null", O_RDWR, 0)) != -1)
{
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2)
{
close(fd);
}
}
#endif
}
return 0;
#else /* if defined(HAVE_FORK) && defined(HAVE_SETSID) */
(void)nochdir;
(void)noclose;
errno = EFAULT;
return -1;
#endif /* if defined(HAVE_FORK) && defined(HAVE_SETSID) */
}
#endif /* ifndef HAVE_DAEMON */
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