/* Synchronize I/O in given file descriptor.

   Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   The GNU C 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 2.1 of the License, or (at your option) any later version.

   The GNU C 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

/* We use an UGLY hack to prevent gcc from finding us cheating.  The

   implementation of aio_fsync and aio_fsync64 are identical and so

   we want to avoid code duplication by using aliases.  But gcc sees

   the different parameter lists and prints a warning.  We define here

   a function so that aio_fsync64 has no prototype.  */

#define aio_fsync64 XXX

#include <aio.h>

/* And undo the hack.  */

#undef aio_fsync64

#include <errno.h>

#include <fcntl.h>

#include <aio_misc.h>

int

aio_fsync (int op, struct aiocb *aiocbp)

{

  if (op != O_DSYNC && __builtin_expect (op != O_SYNC, 0))

    {

      __set_errno (EINVAL);

      return -1;

    }

  /* Verify that this is an open file descriptor.  */

  if (__glibc_unlikely (fcntl (aiocbp->aio_fildes, F_GETFL) == -1))

    {

      __set_errno (EBADF);

      return -1;

    }

  return (__aio_enqueue_request ((aiocb_union *) aiocbp,

				 op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL

	  ? -1 : 0);

}

weak_alias (aio_fsync, aio_fsync64)