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/****************************************************************************
**
** Copyright (C) 2014 Ivan Komissarov <ABBAPOH@gmail.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qstorageinfo_p.h"
#include <QtCore/qdir.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qvarlengtharray.h>
#include "qfilesystementry_p.h"
#include <qt_windows.h>
QT_BEGIN_NAMESPACE
static const int defaultBufferSize = MAX_PATH + 1;
static QString canonicalPath(const QString &rootPath)
{
QString path = QDir::toNativeSeparators(QFileInfo(rootPath).canonicalFilePath());
if (path.isEmpty())
return path;
if (path.startsWith(QLatin1String("\\\\?\\")))
path.remove(0, 4);
if (path.length() < 2 || path.at(1) != QLatin1Char(':'))
return QString();
path[0] = path[0].toUpper();
if (!(path.at(0).unicode() >= 'A' && path.at(0).unicode() <= 'Z'))
return QString();
if (!path.endsWith(QLatin1Char('\\')))
path.append(QLatin1Char('\\'));
return path;
}
void QStorageInfoPrivate::initRootPath()
{
// Do not unnecessarily call QFileInfo::canonicalFilePath() if the path is
// already a drive root since it may hang on network drives.
const QString path = QFileSystemEntry::isDriveRootPath(rootPath)
? QDir::toNativeSeparators(rootPath)
: canonicalPath(rootPath);
if (path.isEmpty()) {
valid = ready = false;
return;
}
// ### test if disk mounted to folder on other disk
wchar_t buffer[defaultBufferSize];
if (::GetVolumePathName(reinterpret_cast<const wchar_t *>(path.utf16()), buffer, defaultBufferSize))
rootPath = QDir::fromNativeSeparators(QString::fromWCharArray(buffer));
else
valid = ready = false;
}
static inline QByteArray getDevice(const QString &rootPath)
{
const QString path = QDir::toNativeSeparators(rootPath);
const UINT type = ::GetDriveType(reinterpret_cast<const wchar_t *>(path.utf16()));
if (type == DRIVE_REMOTE) {
QVarLengthArray<char, 256> buffer(256);
DWORD bufferLength = buffer.size();
DWORD result;
UNIVERSAL_NAME_INFO *remoteNameInfo;
do {
buffer.resize(bufferLength);
remoteNameInfo = reinterpret_cast<UNIVERSAL_NAME_INFO *>(buffer.data());
result = ::WNetGetUniversalName(reinterpret_cast<const wchar_t *>(path.utf16()),
UNIVERSAL_NAME_INFO_LEVEL,
remoteNameInfo,
&bufferLength);
} while (result == ERROR_MORE_DATA);
if (result == NO_ERROR)
return QString::fromWCharArray(remoteNameInfo->lpUniversalName).toUtf8();
return QByteArray();
}
wchar_t deviceBuffer[51];
if (::GetVolumeNameForVolumeMountPoint(reinterpret_cast<const wchar_t *>(path.utf16()),
deviceBuffer,
sizeof(deviceBuffer) / sizeof(wchar_t))) {
return QString::fromWCharArray(deviceBuffer).toLatin1();
}
return QByteArray();
}
void QStorageInfoPrivate::doStat()
{
valid = ready = true;
initRootPath();
if (!valid || !ready)
return;
retrieveVolumeInfo();
if (!valid || !ready)
return;
device = getDevice(rootPath);
retrieveDiskFreeSpace();
}
void QStorageInfoPrivate::retrieveVolumeInfo()
{
const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
const QString path = QDir::toNativeSeparators(rootPath);
wchar_t nameBuffer[defaultBufferSize];
wchar_t fileSystemTypeBuffer[defaultBufferSize];
DWORD fileSystemFlags = 0;
const bool result = ::GetVolumeInformation(reinterpret_cast<const wchar_t *>(path.utf16()),
nameBuffer,
defaultBufferSize,
Q_NULLPTR,
Q_NULLPTR,
&fileSystemFlags,
fileSystemTypeBuffer,
defaultBufferSize);
if (!result) {
ready = false;
valid = ::GetLastError() == ERROR_NOT_READY;
} else {
fileSystemType = QString::fromWCharArray(fileSystemTypeBuffer).toLatin1();
name = QString::fromWCharArray(nameBuffer);
readOnly = (fileSystemFlags & FILE_READ_ONLY_VOLUME) != 0;
}
::SetErrorMode(oldmode);
}
void QStorageInfoPrivate::retrieveDiskFreeSpace()
{
const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
const QString path = QDir::toNativeSeparators(rootPath);
ready = ::GetDiskFreeSpaceEx(reinterpret_cast<const wchar_t *>(path.utf16()),
PULARGE_INTEGER(&bytesAvailable),
PULARGE_INTEGER(&bytesTotal),
PULARGE_INTEGER(&bytesFree));
::SetErrorMode(oldmode);
}
QList<QStorageInfo> QStorageInfoPrivate::mountedVolumes()
{
QList<QStorageInfo> volumes;
QString driveName = QStringLiteral("A:/");
const UINT oldmode = ::SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
quint32 driveBits = quint32(::GetLogicalDrives()) & 0x3ffffff;
::SetErrorMode(oldmode);
while (driveBits) {
if (driveBits & 1) {
QStorageInfo drive(driveName);
if (!drive.rootPath().isEmpty()) // drive exists, but not mounted
volumes.append(drive);
}
driveName[0] = driveName[0].unicode() + 1;
driveBits = driveBits >> 1;
}
return volumes;
}
QStorageInfo QStorageInfoPrivate::root()
{
return QStorageInfo(QDir::fromNativeSeparators(QFile::decodeName(qgetenv("SystemDrive"))));
}
QT_END_NAMESPACE
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