/*

   Unix SMB/CIFS implementation.

   Copyright (C) Andrew Tridgell 2005

   Copyright (C) Jelmer Vernooij 2005

     ** NOTE! The following LGPL license applies to the tevent

     ** library. This does NOT imply that all of Samba is released

     ** under the LGPL

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 3 of the License, or (at your option) any later version.

   This library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this library; if not, see <http://www.gnu.org/licenses/>.

*/

#include "replace.h"

#include "talloc.h"

#include "tevent.h"

#include "tevent_internal.h"

#include "tevent_util.h"

#include <fcntl.h>

/**

 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,

 else

  if SYSV use O_NDELAY

  if BSD use FNDELAY

**/

int ev_set_blocking(int fd, bool set)

{

  int val;

#ifdef O_NONBLOCK

#define FLAG_TO_SET O_NONBLOCK

#else

#ifdef SYSV

#define FLAG_TO_SET O_NDELAY

#else /* BSD */

#define FLAG_TO_SET FNDELAY

#endif

#endif

  if((val = fcntl(fd, F_GETFL, 0)) == -1)

    return -1;

  if(set) /* Turn blocking on - ie. clear nonblock flag */

    val &= ~FLAG_TO_SET;

  else

    val |= FLAG_TO_SET;

  return fcntl( fd, F_SETFL, val);

#undef FLAG_TO_SET

}

bool ev_set_close_on_exec(int fd)

{

#ifdef FD_CLOEXEC

  int val;

  val = fcntl(fd, F_GETFD, 0);

  if (val >= 0) {

    val |= FD_CLOEXEC;

    val = fcntl(fd, F_SETFD, val);

    if (val != -1) {

      return true;

    }

  }

#endif

  return false;

}