1/* Synchronize I/O in given file descriptor.
2 Copyright (C) 1997-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20
21/* We use an UGLY hack to prevent gcc from finding us cheating. The
22 implementation of aio_fsync and aio_fsync64 are identical and so
23 we want to avoid code duplication by using aliases. But gcc sees
24 the different parameter lists and prints a warning. We define here
25 a function so that aio_fsync64 has no prototype. */
26#define aio_fsync64 XXX
27#include <aio.h>
28/* And undo the hack. */
29#undef aio_fsync64
30#include <errno.h>
31#include <fcntl.h>
32
33#include <aio_misc.h>
34
35
36int
37aio_fsync (int op, struct aiocb *aiocbp)
38{
39 if (op != O_DSYNC && __builtin_expect (op != O_SYNC, 0))
40 {
41 __set_errno (EINVAL);
42 return -1;
43 }
44
45 /* Verify that this is an open file descriptor. */
46 if (__glibc_unlikely (fcntl (aiocbp->aio_fildes, F_GETFL) == -1))
47 {
48 __set_errno (EBADF);
49 return -1;
50 }
51
52 return (__aio_enqueue_request ((aiocb_union *) aiocbp,
53 op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL
54 ? -1 : 0);
55}
56
57weak_alias (aio_fsync, aio_fsync64)
58