1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/* Test of fsync() function.
Copyright (C) 2008-2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <unistd.h>
#include "signature.h"
SIGNATURE_CHECK (fsync, int, (int));
#include <errno.h>
#include <fcntl.h>
#include "macros.h"
int
main (void)
{
int fd;
const char *file = "test-fsync.txt";
/* Assuming stdin and stdout are ttys, fsync is allowed to fail, but
may succeed as an extension. */
for (fd = 0; fd < 2; fd++)
if (fsync (fd) != 0)
{
ASSERT (errno == EINVAL /* POSIX */
|| errno == ENOTSUP /* seen on Mac OS X 10.5 */
|| errno == EBADF /* seen on AIX 7.1 */
|| errno == EIO /* seen on mingw */
);
}
/* fsync must fail on invalid fd. */
{
errno = 0;
ASSERT (fsync (-1) == -1);
ASSERT (errno == EBADF);
}
{
close (99);
errno = 0;
ASSERT (fsync (99) == -1);
ASSERT (errno == EBADF);
}
fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
ASSERT (0 <= fd);
ASSERT (write (fd, "hello", 5) == 5);
ASSERT (fsync (fd) == 0);
ASSERT (close (fd) == 0);
/* For a read-only regular file input file descriptor, fsync should
succeed (since at least atime changes can be synchronized). */
fd = open (file, O_RDONLY);
ASSERT (0 <= fd);
{
char buf[1];
ASSERT (read (fd, buf, sizeof buf) == sizeof buf);
}
ASSERT (fsync (fd) == 0);
ASSERT (close (fd) == 0);
ASSERT (unlink (file) == 0);
return 0;
}
|
