| /* |
| * 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 */ |
| |