sysdeps/mach/hurd/fsync.c

   1 /* Copyright (C) 1991-2024 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 #include <sysdep-cancel.h>
  23
  24 /* Make all changes done to FD actually appear on disk.  */
  25 int
  26 fsync (int fd)
  27 {
  28   error_t err;
  29   int cancel_oldtype;
  30
  31   cancel_oldtype = LIBC_CANCEL_ASYNC();
  32   err = HURD_DPORT_USE_CANCEL (fd, __file_sync (port, 1, 0));
  33   LIBC_CANCEL_RESET (cancel_oldtype);
  34   if (err)
  35     {
  36       if (err == EOPNOTSUPP)
  37         /* If the file descriptor does not support sync, return EINVAL
  38            as POSIX specifies.  */
  39         err = EINVAL;
  40       return __hurd_dfail (fd, err);
  41     }
  42   return 0;
  43 }
  44 libc_hidden_def (fsync)