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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
use std::io;
use std::mem;
use winapi::shared::minwindef::FILETIME;
use winapi::shared::winerror::NO_ERROR;
use winapi::um::errhandlingapi::GetLastError;
use winapi::um::fileapi::{
GetFileInformationByHandle, GetFileType, BY_HANDLE_FILE_INFORMATION,
};
use winapi::um::winnt;
use crate::AsHandleRef;
/// Return various pieces of information about a file.
///
/// This includes information such as a file's size, unique identifier and
/// time related fields.
///
/// This corresponds to calling [`GetFileInformationByHandle`].
///
/// [`GetFileInformationByHandle`]: https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfileinformationbyhandle
pub fn information<H: AsHandleRef>(h: H) -> io::Result<Information> {
unsafe {
let mut info: BY_HANDLE_FILE_INFORMATION = mem::zeroed();
let rc = GetFileInformationByHandle(h.as_raw(), &mut info);
if rc == 0 {
return Err(io::Error::last_os_error());
};
Ok(Information(info))
}
}
/// Returns the file type of the given handle.
///
/// If there was a problem querying the file type, then an error is returned.
///
/// This corresponds to calling [`GetFileType`].
///
/// [`GetFileType`]: https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfiletype
pub fn typ<H: AsHandleRef>(h: H) -> io::Result<Type> {
unsafe {
let rc = GetFileType(h.as_raw());
if rc == 0 && GetLastError() != NO_ERROR {
return Err(io::Error::last_os_error());
}
Ok(Type(rc))
}
}
/// Returns true if and only if the given file attributes contain the
/// `FILE_ATTRIBUTE_HIDDEN` attribute.
pub fn is_hidden(file_attributes: u64) -> bool {
file_attributes & (winnt::FILE_ATTRIBUTE_HIDDEN as u64) > 0
}
/// Represents file information such as creation time, file size, etc.
///
/// This wraps a [`BY_HANDLE_FILE_INFORMATION`].
///
/// [`BY_HANDLE_FILE_INFORMATION`]: https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/ns-fileapi-_by_handle_file_information
#[derive(Clone)]
pub struct Information(BY_HANDLE_FILE_INFORMATION);
impl Information {
/// Returns file attributes.
///
/// This corresponds to `dwFileAttributes`.
pub fn file_attributes(&self) -> u64 {
self.0.dwFileAttributes as u64
}
/// Returns true if and only if this file information has the
/// `FILE_ATTRIBUTE_HIDDEN` attribute.
pub fn is_hidden(&self) -> bool {
is_hidden(self.file_attributes())
}
/// Return the creation time, if one exists.
///
/// This corresponds to `ftCreationTime`.
pub fn creation_time(&self) -> Option<u64> {
filetime_to_u64(self.0.ftCreationTime)
}
/// Return the last access time, if one exists.
///
/// This corresponds to `ftLastAccessTime`.
pub fn last_access_time(&self) -> Option<u64> {
filetime_to_u64(self.0.ftLastAccessTime)
}
/// Return the last write time, if one exists.
///
/// This corresponds to `ftLastWriteTime`.
pub fn last_write_time(&self) -> Option<u64> {
filetime_to_u64(self.0.ftLastWriteTime)
}
/// Return the serial number of the volume that the file is on.
///
/// This corresponds to `dwVolumeSerialNumber`.
pub fn volume_serial_number(&self) -> u64 {
self.0.dwVolumeSerialNumber as u64
}
/// Return the file size, in bytes.
///
/// This corresponds to `nFileSizeHigh` and `nFileSizeLow`.
pub fn file_size(&self) -> u64 {
((self.0.nFileSizeHigh as u64) << 32) | (self.0.nFileSizeLow as u64)
}
/// Return the number of links to this file.
///
/// This corresponds to `nNumberOfLinks`.
pub fn number_of_links(&self) -> u64 {
self.0.nNumberOfLinks as u64
}
/// Return the index of this file. The index of a file is a purpotedly
/// unique identifier for a file within a particular volume.
pub fn file_index(&self) -> u64 {
((self.0.nFileIndexHigh as u64) << 32) | (self.0.nFileIndexLow as u64)
}
}
/// Represents a Windows file type.
///
/// This wraps the result of [`GetFileType`].
///
/// [`GetFileType`]: https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getfiletype
#[derive(Clone)]
pub struct Type(u32);
impl Type {
/// Returns true if this type represents a character file, which is
/// typically an LPT device or a console.
pub fn is_char(&self) -> bool {
self.0 == ::winapi::um::winbase::FILE_TYPE_CHAR
}
/// Returns true if this type represents a disk file.
pub fn is_disk(&self) -> bool {
self.0 == ::winapi::um::winbase::FILE_TYPE_DISK
}
/// Returns true if this type represents a sock, named pipe or an
/// anonymous pipe.
pub fn is_pipe(&self) -> bool {
self.0 == ::winapi::um::winbase::FILE_TYPE_PIPE
}
/// Returns true if this type is not known.
///
/// Note that this never corresponds to a failure.
pub fn is_unknown(&self) -> bool {
self.0 == ::winapi::um::winbase::FILE_TYPE_UNKNOWN
}
}
fn filetime_to_u64(t: FILETIME) -> Option<u64> {
let v = ((t.dwHighDateTime as u64) << 32) | (t.dwLowDateTime as u64);
if v == 0 {
None
} else {
Some(v)
}
}
|
