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1/****************************************************************************
2**
3** Copyright (C) 2014 Ivan Komissarov <ABBAPOH@gmail.com>
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
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15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
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38****************************************************************************/
39
40#include "qstorageinfo_p.h"
41
42#include <QtCore/qdir.h>
43#include <QtCore/qfileinfo.h>
44#include <QtCore/qvarlengtharray.h>
45
46#include "qfilesystementry_p.h"
47
48#include <qt_windows.h>
49
50QT_BEGIN_NAMESPACE
51
52static const int defaultBufferSize = MAX_PATH + 1;
53
54static QString canonicalPath(const QString &rootPath)
55{
56 QString path = QDir::toNativeSeparators(QFileInfo(rootPath).canonicalFilePath());
57 if (path.isEmpty())
58 return path;
59
60 if (path.startsWith(QLatin1String("\\\\?\\")))
61 path.remove(0, 4);
62 if (path.length() < 2 || path.at(1) != QLatin1Char(':'))
63 return QString();
64
65 path[0] = path[0].toUpper();
66 if (!(path.at(0).unicode() >= 'A' && path.at(0).unicode() <= 'Z'))
67 return QString();
68 if (!path.endsWith(QLatin1Char('\\')))
69 path.append(QLatin1Char('\\'));
70 return path;
71}
72
73void QStorageInfoPrivate::initRootPath()
74{
75 // Do not unnecessarily call QFileInfo::canonicalFilePath() if the path is
76 // already a drive root since it may hang on network drives.
77 const QString path = QFileSystemEntry::isDriveRootPath(rootPath)
78 ? QDir::toNativeSeparators(rootPath)
79 : canonicalPath(rootPath);
80
81 if (path.isEmpty()) {
82 valid = ready = false;
83 return;
84 }
85
86 // ### test if disk mounted to folder on other disk
87 wchar_t buffer[defaultBufferSize];
88 if (::GetVolumePathName(reinterpret_cast<const wchar_t *>(path.utf16()), buffer, defaultBufferSize))
89 rootPath = QDir::fromNativeSeparators(QString::fromWCharArray(buffer));
90 else
91 valid = ready = false;
92}
93
94static inline QByteArray getDevice(const QString &rootPath)
95{
96 const QString path = QDir::toNativeSeparators(rootPath);
97 const UINT type = ::GetDriveType(reinterpret_cast<const wchar_t *>(path.utf16()));
98 if (type == DRIVE_REMOTE) {
99 QVarLengthArray<char, 256> buffer(256);
100 DWORD bufferLength = buffer.size();
101 DWORD result;
102 UNIVERSAL_NAME_INFO *remoteNameInfo;
103 do {
104 buffer.resize(bufferLength);
105 remoteNameInfo = reinterpret_cast<UNIVERSAL_NAME_INFO *>(buffer.data());
106 result = ::WNetGetUniversalName(reinterpret_cast<const wchar_t *>(path.utf16()),
107 UNIVERSAL_NAME_INFO_LEVEL,
108 remoteNameInfo,
109 &bufferLength);
110 } while (result == ERROR_MORE_DATA);
111 if (result == NO_ERROR)
112 return QString::fromWCharArray(remoteNameInfo->lpUniversalName).toUtf8();
113 return QByteArray();
114 }
115
116 wchar_t deviceBuffer[51];
117 if (::GetVolumeNameForVolumeMountPoint(reinterpret_cast<const wchar_t *>(path.utf16()),
118 deviceBuffer,
119 sizeof(deviceBuffer) / sizeof(wchar_t))) {
120 return QString::fromWCharArray(deviceBuffer).toLatin1();
121 }
122 return QByteArray();
123}
124
125void QStorageInfoPrivate::doStat()
126{
127 valid = ready = true;
128 initRootPath();
129 if (!valid || !ready)
130 return;
131
132 retrieveVolumeInfo();
133 if (!valid || !ready)
134 return;
135 device = getDevice(rootPath);
136 retrieveDiskFreeSpace();
137}
138
139void QStorageInfoPrivate::retrieveVolumeInfo()
140{
141 const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
142
143 const QString path = QDir::toNativeSeparators(rootPath);
144 wchar_t nameBuffer[defaultBufferSize];
145 wchar_t fileSystemTypeBuffer[defaultBufferSize];
146 DWORD fileSystemFlags = 0;
147 const bool result = ::GetVolumeInformation(reinterpret_cast<const wchar_t *>(path.utf16()),
148 nameBuffer,
149 defaultBufferSize,
150 nullptr,
151 nullptr,
152 &fileSystemFlags,
153 fileSystemTypeBuffer,
154 defaultBufferSize);
155 if (!result) {
156 ready = false;
157 valid = ::GetLastError() == ERROR_NOT_READY;
158 } else {
159 fileSystemType = QString::fromWCharArray(fileSystemTypeBuffer).toLatin1();
160 name = QString::fromWCharArray(nameBuffer);
161
162 readOnly = (fileSystemFlags & FILE_READ_ONLY_VOLUME) != 0;
163 }
164
165 ::SetErrorMode(oldmode);
166}
167
168void QStorageInfoPrivate::retrieveDiskFreeSpace()
169{
170 const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
171
172 const QString path = QDir::toNativeSeparators(rootPath);
173 ready = ::GetDiskFreeSpaceEx(reinterpret_cast<const wchar_t *>(path.utf16()),
174 PULARGE_INTEGER(&bytesAvailable),
175 PULARGE_INTEGER(&bytesTotal),
176 PULARGE_INTEGER(&bytesFree));
177
178 ::SetErrorMode(oldmode);
179}
180
181QList<QStorageInfo> QStorageInfoPrivate::mountedVolumes()
182{
183 QList<QStorageInfo> volumes;
184
185 QString driveName = QStringLiteral("A:/");
186 const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
187 quint32 driveBits = quint32(::GetLogicalDrives()) & 0x3ffffff;
188 ::SetErrorMode(oldmode);
189 while (driveBits) {
190 if (driveBits & 1) {
191 QStorageInfo drive(driveName);
192 if (!drive.rootPath().isEmpty()) // drive exists, but not mounted
193 volumes.append(drive);
194 }
195 driveName[0] = driveName[0].unicode() + 1;
196 driveBits = driveBits >> 1;
197 }
198
199 return volumes;
200}
201
202QStorageInfo QStorageInfoPrivate::root()
203{
204 return QStorageInfo(QDir::fromNativeSeparators(QFile::decodeName(qgetenv("SystemDrive"))));
205}
206
207QT_END_NAMESPACE
208

Warning: That file was not part of the compilation database. It may have many parsing errors.