/* fstat() replacement.

   Copyright (C) 2011-2016 Free Software Foundation, Inc.

   This program 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 2.1 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 Lesser General Public License for more details.

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

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* If the user's config.h happens to include <sys/stat.h>, let it include only

   the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to

   rpl_fstat.  */

#define __need_system_sys_stat_h

#include <config.h>

/* Get the original definition of fstat.  It might be defined as a macro.  */

#include <sys/types.h>

#include <sys/stat.h>

#if _GL_WINDOWS_64_BIT_ST_SIZE

# undef stat /* avoid warning on mingw64 with _FILE_OFFSET_BITS=64 */

# define stat _stati64

# undef fstat /* avoid warning on mingw64 with _FILE_OFFSET_BITS=64 */

# define fstat _fstati64

#endif

#undef __need_system_sys_stat_h

static int

orig_fstat (int fd, struct stat *buf)

{

  return fstat (fd, buf);

}

/* Specification.  */

/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc

   eliminates this include because of the preliminary #include <sys/stat.h>

   above.  */

#include "sys/stat.h"

#include <errno.h>

#include <unistd.h>

#if HAVE_MSVC_INVALID_PARAMETER_HANDLER

# include "msvc-inval.h"

#endif

#if HAVE_MSVC_INVALID_PARAMETER_HANDLER

static int

fstat_nothrow (int fd, struct stat *buf)

{

  int result;

  TRY_MSVC_INVAL

    {

      result = orig_fstat (fd, buf);

    }

  CATCH_MSVC_INVAL

    {

      result = -1;

      errno = EBADF;

    }

  DONE_MSVC_INVAL;

  return result;

}

#else

# define fstat_nothrow orig_fstat

#endif

int

rpl_fstat (int fd, struct stat *buf)

{

#if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY

  /* Handle the case when rpl_open() used a dummy file descriptor to work

     around an open() that can't normally visit directories.  */

  const char *name = _gl_directory_name (fd);

  if (name != NULL)

    return stat (name, buf);

#endif

  return fstat_nothrow (fd, buf);

}