/* *  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) 2002-2004 James Yonan <jim@yonan.net> * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  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 (see the file COPYING included with this *  distribution); if not, write to the Free Software Foundation, Inc., *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#ifdef WIN32#include "config-win32.h"#else#include "config.h"#endif#include "syshead.h"#include "fdmisc.h"#include "error.h"#include "memdbg.h"/* Set a file descriptor to non-blocking */voidset_nonblock (int fd){#ifdef WIN32  u_long arg = 1;  if (ioctlsocket (fd, FIONBIO, &arg))    msg (M_SOCKERR, "Set socket to non-blocking mode failed");#else  if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0)    msg (M_ERR, "Set file descriptor to non-blocking mode failed");#endif}/* Set a file descriptor to not be passed across execs */voidset_cloexec (int fd){#ifndef WIN32  if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)    msg (M_ERR, "Set FD_CLOEXEC flag on file descriptor failed");#endif}