| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** 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 "qsystemlibrary_p.h" |
| #include <QtCore/qvarlengtharray.h> |
| #include <QtCore/qstringlist.h> |
| #include <QtCore/qfileinfo.h> |
| |
| /*! |
| |
| \internal |
| \class QSystemLibrary |
| \inmodule QtCore |
| |
| The purpose of this class is to load only libraries that are located in |
| well-known and trusted locations on the filesystem. It does not suffer from |
| the security problem that QLibrary has, therefore it will never search in |
| the current directory. |
| |
| The search order is the same as the order in DLL Safe search mode Windows, |
| except that we don't search: |
| * The current directory |
| * The 16-bit system directory. (normally \c{c:\windows\system}) |
| * The Windows directory. (normally \c{c:\windows}) |
| |
| This means that the effective search order is: |
| 1. Application path. |
| 2. System libraries path. |
| 3. Trying all paths inside the PATH environment variable. |
| |
| Note, when onlySystemDirectory is true it will skip 1) and 3). |
| |
| DLL Safe search mode is documented in the "Dynamic-Link Library Search |
| Order" document on MSDN. |
| */ |
| |
| QT_BEGIN_NAMESPACE |
| |
| #if defined(Q_OS_WINRT) |
| HINSTANCE QSystemLibrary::load(const wchar_t *libraryName, bool onlySystemDirectory /* = true */) |
| { |
| Q_UNUSED(onlySystemDirectory); |
| return ::LoadPackagedLibrary(libraryName, 0); |
| } |
| #else |
| |
| #if !defined(QT_BOOTSTRAPPED) |
| extern QString qAppFileName(); |
| #endif |
| |
| static QString qSystemDirectory() |
| { |
| QVarLengthArray<wchar_t, MAX_PATH> fullPath; |
| |
| UINT retLen = ::GetSystemDirectory(fullPath.data(), MAX_PATH); |
| if (retLen > MAX_PATH) { |
| fullPath.resize(retLen); |
| retLen = ::GetSystemDirectory(fullPath.data(), retLen); |
| } |
| // in some rare cases retLen might be 0 |
| return QString::fromWCharArray(fullPath.constData(), int(retLen)); |
| } |
| |
| HINSTANCE QSystemLibrary::load(const wchar_t *libraryName, bool onlySystemDirectory /* = true */) |
| { |
| QStringList searchOrder; |
| |
| #if !defined(QT_BOOTSTRAPPED) |
| if (!onlySystemDirectory) |
| searchOrder << QFileInfo(qAppFileName()).path(); |
| #endif |
| searchOrder << qSystemDirectory(); |
| |
| if (!onlySystemDirectory) { |
| const QString PATH(QLatin1String(qgetenv("PATH").constData())); |
| searchOrder << PATH.split(QLatin1Char(';'), QString::SkipEmptyParts); |
| } |
| QString fileName = QString::fromWCharArray(libraryName); |
| fileName.append(QLatin1String(".dll")); |
| |
| // Start looking in the order specified |
| for (int i = 0; i < searchOrder.count(); ++i) { |
| QString fullPathAttempt = searchOrder.at(i); |
| if (!fullPathAttempt.endsWith(QLatin1Char('\\'))) { |
| fullPathAttempt.append(QLatin1Char('\\')); |
| } |
| fullPathAttempt.append(fileName); |
| HINSTANCE inst = ::LoadLibrary(reinterpret_cast<const wchar_t *>(fullPathAttempt.utf16())); |
| if (inst != 0) |
| return inst; |
| } |
| return 0; |
| |
| } |
| |
| #endif // Q_OS_WINRT |
| |
| QT_END_NAMESPACE |