1  /* Copyright (C) 1991-2023 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)