1/* Copyright (C) 1991-2022 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. */
25int
26fsync (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}
44libc_hidden_def (fsync)
45

source code of glibc/sysdeps/mach/hurd/fsync.c