sysdeps/mach/hurd/fdatasync.c

   1 /* Copyright (C) 1991-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include <hurd.h>
  21 #include <hurd/fd.h>
  22
  23 /* Make all changes done to FD's file data actually appear on disk.  */
  24 int
  25 fdatasync (int fd)
  26 {
  27   error_t err = HURD_DPORT_USE (fd, __file_sync (port, 1, 1));
  28   if (err)
  29     {
  30       if (err == EOPNOTSUPP)
  31         /* If the file descriptor does not support sync, return EINVAL
  32            as POSIX specifies.  */
  33         err = EINVAL;
  34       return __hurd_dfail (fd, err);
  35     }
  36   return 0;
  37 }