/* Duplicate an open file descriptor.

   Copyright (C) 2011-2015 Free Software Foundation, Inc.

   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 3 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.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */

#include <unistd.h>

#include <errno.h>

#include "msvc-inval.h"

#undef dup

#if HAVE_MSVC_INVALID_PARAMETER_HANDLER

static int

dup_nothrow (int fd)

{

  int result;

  TRY_MSVC_INVAL

    {

      result = dup (fd);

    }

  CATCH_MSVC_INVAL

    {

      result = -1;

      errno = EBADF;

    }

  DONE_MSVC_INVAL;

  return result;

}

#else

# define dup_nothrow dup

#endif

int

rpl_dup (int fd)

{

  int result = dup_nothrow (fd);

#if REPLACE_FCHDIR

  if (result >= 0)

    result = _gl_register_dup (fd, result);

#endif

  return result;

}