blob: 2298aad3db3e8a66aef249c9af49c7a5ec1b07f1 (
plain)
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
81
82
83
84
85
86
87
|
/* Emulate fsync on platforms that lack it, primarily Windows and
cross-compilers like MinGW.
This is derived from sqlite3 sources.
https://www.sqlite.org/src/finfo?name=src/os_win.c
https://www.sqlite.org/copyright.html
Written by Richard W.M. Jones <rjones.at.redhat.com>
Copyright (C) 2008-2020 Free Software Foundation, Inc.
This library 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 library 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 <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <unistd.h>
#if defined _WIN32 && ! defined __CYGWIN__
/* FlushFileBuffers */
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <errno.h>
/* Get _get_osfhandle. */
# if GNULIB_MSVC_NOTHROW
# include "msvc-nothrow.h"
# else
# include <io.h>
# endif
int
fsync (int fd)
{
HANDLE h = (HANDLE) _get_osfhandle (fd);
DWORD err;
if (h == INVALID_HANDLE_VALUE)
{
errno = EBADF;
return -1;
}
if (!FlushFileBuffers (h))
{
/* Translate some Windows errors into rough approximations of Unix
* errors. MSDN is useless as usual - in this case it doesn't
* document the full range of errors.
*/
err = GetLastError ();
switch (err)
{
case ERROR_ACCESS_DENIED:
/* For a read-only handle, fsync should succeed, even though we have
no way to sync the access-time changes. */
return 0;
/* eg. Trying to fsync a tty. */
case ERROR_INVALID_HANDLE:
errno = EINVAL;
break;
default:
errno = EIO;
}
return -1;
}
return 0;
}
#else /* !Windows */
# error "This platform lacks fsync function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib."
#endif /* !Windows */
|
