int my_sync(File fd, myf my_flags)
{
  int res;
  DBUG_ENTER("my_sync");
  DBUG_PRINT("my",("Fd: %d  my_flags: %d", fd, my_flags));

  do
  {
#if defined(HAVE_FDATASYNC)
    res= fdatasync(fd);
#elif defined(HAVE_FSYNC)
    res= fsync(fd);
#elif defined(__WIN__)
    res= _commit(fd);
#else
    res= 0;                 /* No sync (strange OS) */
#endif
  } while (res == -1 && errno == EINTR);

  if (res)
  {
    int er= errno;
    if (!(my_errno= er))
      my_errno= -1;                             /* Unknown error */
    if ((my_flags & MY_IGNORE_BADFD) &&
        (er == EBADF || er == EINVAL || er == EROFS))
      res= 0;
    else if (my_flags & MY_WME)
      my_error(EE_SYNC, MYF(ME_BELL+ME_WAITTANG), my_filename(fd), my_errno);
  }
  DBUG_RETURN(res);
} /* my_sync */