openvpn/fdmisc.c

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #ifdef WIN32
  26 #include "config-win32.h"
  27 #else
  28 #include "config.h"
  29 #endif
  30
  31 #include "syshead.h"
  32
  33 #include "fdmisc.h"
  34 #include "error.h"
  35
  36 #include "memdbg.h"
  37
  38 /* Set a file descriptor to non-blocking */
  39 void
  40 set_nonblock (int fd)
  41 {
  42 #ifdef WIN32
  43   u_long arg = 1;
  44   if (ioctlsocket (fd, FIONBIO, &arg))
  45     msg (M_SOCKERR, "Set socket to non-blocking mode failed");
  46 #else
  47   if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0)
  48     msg (M_ERR, "Set file descriptor to non-blocking mode failed");
  49 #endif
  50 }
  51
  52 /* Set a file descriptor to not be passed across execs */
  53 void
  54 set_cloexec (int fd)
  55 {
  56 #ifndef WIN32
  57   if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
  58     msg (M_ERR, "Set FD_CLOEXEC flag on file descriptor failed");
  59 #endif
  60 }