1 /* Synchronize I/O in given file descriptor.
2 Copyright (C) 1997-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19
20 /* We use an UGLY hack to prevent gcc from finding us cheating. The
21 implementation of aio_fsync and aio_fsync64 are identical and so
22 we want to avoid code duplication by using aliases. But gcc sees
23 the different parameter lists and prints a warning. We define here
24 a function so that aio_fsync64 has no prototype. */
25 #define aio_fsync64 XXX
26 #include <aio.h>
27 /* And undo the hack. */
28 #undef aio_fsync64
29 #include <errno.h>
30 #include <fcntl.h>
31
32 #include <aio_misc.h>
33 #include <shlib-compat.h>
34
35 int
__aio_fsync(int op,struct aiocb * aiocbp)36 __aio_fsync (int op, struct aiocb *aiocbp)
37 {
38 if (op != O_DSYNC && __builtin_expect (op != O_SYNC, 0))
39 {
40 __set_errno (EINVAL);
41 return -1;
42 }
43
44 /* Verify that this is an open file descriptor. */
45 if (__glibc_unlikely (__fcntl (aiocbp->aio_fildes, F_GETFL) == -1))
46 {
47 __set_errno (EBADF);
48 return -1;
49 }
50
51 return (__aio_enqueue_request ((aiocb_union *) aiocbp,
52 op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL
53 ? -1 : 0);
54 }
55
56 #if PTHREAD_IN_LIBC
57 versioned_symbol (libc, __aio_fsync, aio_fsync, GLIBC_2_34);
58 versioned_symbol (libc, __aio_fsync, aio_fsync64, GLIBC_2_34);
59 # if OTHER_SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_34)
60 compat_symbol (librt, __aio_fsync, aio_fsync, GLIBC_2_1);
61 compat_symbol (librt, __aio_fsync, aio_fsync64, GLIBC_2_1);
62 # endif
63 #else /* !PTHREAD_IN_LIBC */
64 strong_alias (__aio_fsync, aio_fsync)
65 weak_alias (__aio_fsync, aio_fsync64)
66 #endif /* !PTHREAD_IN_LIBC */
67