rt/aio_fsync.c

   1 /* Synchronize I/O in given file descriptor.  Stub version.
   2    Copyright (C) 2001-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19
  20 /* We use an UGLY hack to prevent gcc from finding us cheating.  The
  21    implementation of aio_fsync and aio_fsync64 are identical and so
  22    we want to avoid code duplication by using aliases.  But gcc sees
  23    the different parameter lists and prints a warning.  We define here
  24    a function so that aio_fsync64 has no prototype.  */
  25 #define aio_fsync64 XXX
  26 #include <aio.h>
  27 /* And undo the hack.  */
  28 #undef aio_fsync64
  29
  30 #include <errno.h>
  31 #include <fcntl.h>
  32
  33 int
  34 aio_fsync (int op, struct aiocb *aiocbp)
  35 {
  36   if (op != O_SYNC && op != O_DSYNC)
  37     {
  38       __set_errno (EINVAL);
  39       return -1;
  40     }
  41
  42   __set_errno (ENOSYS);
  43   return -1;
  44 }
  45
  46 weak_alias (aio_fsync, aio_fsync64)
  47
  48 stub_warning (aio_fsync)
  49 stub_warning (aio_fsync64)