Backporting QlockFile. Successful build on Windows.

--HG--
branch : develop

src/app/app.pro

@@ -430,6 +430,9 @@ DEPENDPATH += $$PWD/../libs/vlayout
 win32:!win32-g++: PRE_TARGETDEPS += $$OUT_PWD/../libs/vlayout/$${DESTDIR}/vlayout.lib
 else:unix|win32-g++: PRE_TARGETDEPS += $$OUT_PWD/../libs/vlayout/$${DESTDIR}/libvlayout.a
 
+# For build qt backport code
+win32: LIBS+= libole32 libuuid
+
 
 # Strip after you link all libaries.
 CONFIG(release, debug|release){

src/app/core/backport/qabstractfileengine_p.h

@@ -0,0 +1,251 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QABSTRACTFILEENGINE_P_H
+#define QABSTRACTFILEENGINE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QFile>
+#include <QDir>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifdef open
+#error qabstractfileengine_p.h must be included before any header file that defines open
+#endif
+
+class QVariant;
+class QAbstractFileEngineIterator;
+class QAbstractFileEnginePrivate;
+
+class QAbstractFileEngine
+{
+public:
+    enum FileFlag {
+        //perms (overlaps the QFile::Permission)
+        ReadOwnerPerm = 0x4000, WriteOwnerPerm = 0x2000, ExeOwnerPerm = 0x1000,
+        ReadUserPerm  = 0x0400, WriteUserPerm  = 0x0200, ExeUserPerm  = 0x0100,
+        ReadGroupPerm = 0x0040, WriteGroupPerm = 0x0020, ExeGroupPerm = 0x0010,
+        ReadOtherPerm = 0x0004, WriteOtherPerm = 0x0002, ExeOtherPerm = 0x0001,
+
+        //types
+        LinkType      = 0x10000,
+        FileType      = 0x20000,
+        DirectoryType = 0x40000,
+        BundleType    = 0x80000,
+
+        //flags
+        HiddenFlag     = 0x0100000,
+        LocalDiskFlag  = 0x0200000,
+        ExistsFlag     = 0x0400000,
+        RootFlag       = 0x0800000,
+        Refresh        = 0x1000000,
+
+        //masks
+        PermsMask  = 0x0000FFFF,
+        TypesMask  = 0x000F0000,
+        FlagsMask  = 0x0FF00000,
+        FileInfoAll = FlagsMask | PermsMask | TypesMask
+    };
+    Q_DECLARE_FLAGS(FileFlags, FileFlag)
+
+    enum FileName {
+        DefaultName,
+        BaseName,
+        PathName,
+        AbsoluteName,
+        AbsolutePathName,
+        LinkName,
+        CanonicalName,
+        CanonicalPathName,
+        BundleName,
+        NFileNames = 9
+    };
+    enum FileOwner {
+        OwnerUser,
+        OwnerGroup
+    };
+    enum FileTime {
+        CreationTime,
+        ModificationTime,
+        AccessTime
+    };
+
+    virtual ~QAbstractFileEngine();
+
+    virtual bool open(QIODevice::OpenMode openMode);
+    virtual bool close();
+    virtual bool flush();
+    virtual bool syncToDisk();
+    virtual qint64 size() const;
+    virtual qint64 pos() const;
+    virtual bool seek(qint64 pos);
+    virtual bool isSequential() const;
+    virtual bool remove();
+    virtual bool copy(const QString &newName);
+    virtual bool rename(const QString &newName);
+    virtual bool renameOverwrite(const QString &newName);
+    virtual bool link(const QString &newName);
+    virtual bool mkdir(const QString &dirName, bool createParentDirectories) const;
+    virtual bool rmdir(const QString &dirName, bool recurseParentDirectories) const;
+    virtual bool setSize(qint64 size);
+    virtual bool caseSensitive() const;
+    virtual bool isRelativePath() const;
+    virtual QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const;
+    virtual FileFlags fileFlags(FileFlags type=FileInfoAll) const;
+    virtual bool setPermissions(uint perms);
+    virtual QString fileName(FileName file=DefaultName) const;
+    virtual uint ownerId(FileOwner) const;
+    virtual QString owner(FileOwner) const;
+    virtual QDateTime fileTime(FileTime time) const;
+    virtual void setFileName(const QString &file);
+    virtual int handle() const;
+    bool atEnd() const;
+    uchar *map(qint64 offset, qint64 size, QFile::MemoryMapFlags flags);
+    bool unmap(uchar *ptr);
+
+    typedef QAbstractFileEngineIterator Iterator;
+    virtual Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames);
+    virtual Iterator *endEntryList();
+
+    virtual qint64 read(char *data, qint64 maxlen);
+    virtual qint64 readLine(char *data, qint64 maxlen);
+    virtual qint64 write(const char *data, qint64 len);
+
+    QFile::FileError error() const;
+    QString errorString() const;
+
+    enum Extension {
+        AtEndExtension,
+        FastReadLineExtension,
+        MapExtension,
+        UnMapExtension
+    };
+    class ExtensionOption
+    {};
+    class ExtensionReturn
+    {};
+
+    class MapExtensionOption : public ExtensionOption {
+    public:
+        qint64 offset;
+        qint64 size;
+        QFile::MemoryMapFlags flags;
+    };
+    class MapExtensionReturn : public ExtensionReturn {
+    public:
+        uchar *address;
+    };
+
+    class UnMapExtensionOption : public ExtensionOption {
+    public:
+        uchar *address;
+    };
+
+    virtual bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
+    virtual bool supportsExtension(Extension extension) const;
+
+    // Factory
+    static QAbstractFileEngine *create(const QString &fileName);
+
+protected:
+    void setError(QFile::FileError error, const QString &str);
+
+    QAbstractFileEngine();
+    QAbstractFileEngine(QAbstractFileEnginePrivate &);
+
+    QScopedPointer<QAbstractFileEnginePrivate> d_ptr;
+private:
+    Q_DECLARE_PRIVATE(QAbstractFileEngine)
+    Q_DISABLE_COPY(QAbstractFileEngine)
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QAbstractFileEngine::FileFlags)
+
+class QAbstractFileEngineHandler
+{
+public:
+    QAbstractFileEngineHandler();
+    virtual ~QAbstractFileEngineHandler();
+    virtual QAbstractFileEngine *create(const QString &fileName) const = 0;
+};
+
+class QAbstractFileEngineIteratorPrivate;
+class QAbstractFileEngineIterator
+{
+public:
+    QAbstractFileEngineIterator(QDir::Filters filters, const QStringList &nameFilters);
+    virtual ~QAbstractFileEngineIterator();
+
+    virtual QString next() = 0;
+    virtual bool hasNext() const = 0;
+
+    QString path() const;
+    QStringList nameFilters() const;
+    QDir::Filters filters() const;
+
+    virtual QString currentFileName() const = 0;
+    virtual QFileInfo currentFileInfo() const;
+    QString currentFilePath() const;
+
+protected:
+    enum EntryInfoType {
+    };
+    virtual QVariant entryInfo(EntryInfoType type) const;
+
+private:
+    Q_DISABLE_COPY(QAbstractFileEngineIterator)
+    friend class QDirIterator;
+    friend class QDirIteratorPrivate;
+    void setPath(const QString &path);
+    QScopedPointer<QAbstractFileEngineIteratorPrivate> d;
+};
+
+class QAbstractFileEnginePrivate
+{
+public:
+    inline QAbstractFileEnginePrivate()
+        : fileError(QFile::UnspecifiedError)
+    {
+    }
+    inline virtual ~QAbstractFileEnginePrivate() { }
+
+    QFile::FileError fileError;
+    QString errorString;
+
+    QAbstractFileEngine *q_ptr;
+    Q_DECLARE_PUBLIC(QAbstractFileEngine)
+};
+
+QAbstractFileEngine *qt_custom_file_engine_handler_create(const QString &path);
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QABSTRACTFILEENGINE_P_H

src/app/core/backport/qcore_mac.cpp

@@ -0,0 +1,61 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qcore_mac_p.h"
+#include <new>
+#include <QVarLengthArray>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+QString QCFString::toQString(CFStringRef str)
+{
+    if(!str)
+        return QString();
+    CFIndex length = CFStringGetLength(str);
+    const UniChar *chars = CFStringGetCharactersPtr(str);
+    if (chars)
+        return QString(reinterpret_cast<const QChar *>(chars), length);
+
+    QVarLengthArray<UniChar> buffer(length);
+    CFStringGetCharacters(str, CFRangeMake(0, length), buffer.data());
+    return QString(reinterpret_cast<const QChar *>(buffer.constData()), length);
+}
+
+QCFString::operator QString() const
+{
+    if (string.isEmpty() && type)
+        const_cast<QCFString*>(this)->string = toQString(type);
+    return string;
+}
+
+CFStringRef QCFString::toCFStringRef(const QString &string)
+{
+    return CFStringCreateWithCharacters(0, reinterpret_cast<const UniChar *>(string.unicode()),
+                                        string.length());
+}
+
+QCFString::operator CFStringRef() const
+{
+    if (!type)
+        const_cast<QCFString*>(this)->type = toCFStringRef(string);
+    return type;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qcore_mac_p.h

@@ -0,0 +1,131 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QCORE_MAC_P_H
+#define QCORE_MAC_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef __IMAGECAPTURE__
+#  define __IMAGECAPTURE__
+#endif
+
+#if defined(QT_BOOTSTRAPPED)
+#include <ApplicationServices/ApplicationServices.h>
+#else
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+
+#include <QtGlobal>
+
+#ifdef Q_OS_MACX
+#include <CoreServices/CoreServices.h>
+#endif
+
+#ifdef __OBJC__
+#include <Foundation/Foundation.h>
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#include <QString>
+
+#if defined( __OBJC__) && defined(QT_NAMESPACE)
+#define QT_NAMESPACE_ALIAS_OBJC_CLASS(__KLASS__) @compatibility_alias __KLASS__ QT_MANGLE_NAMESPACE(__KLASS__)
+#else
+#define QT_NAMESPACE_ALIAS_OBJC_CLASS(__KLASS__)
+#endif
+
+/*
+    Helper class that automates refernce counting for CFtypes.
+    After constructing the QCFType object, it can be copied like a
+    value-based type.
+
+    Note that you must own the object you are wrapping.
+    This is typically the case if you get the object from a Core
+    Foundation function with the word "Create" or "Copy" in it. If
+    you got the object from a "Get" function, either retain it or use
+    constructFromGet(). One exception to this rule is the
+    HIThemeGet*Shape functions, which in reality are "Copy" functions.
+*/
+template <typename T>
+class QCFType
+{
+public:
+    inline QCFType(const T &t = 0) : type(t) {}
+    inline QCFType(const QCFType &helper) : type(helper.type) { if (type) CFRetain(type); }
+    inline ~QCFType() { if (type) CFRelease(type); }
+    inline operator T() { return type; }
+    inline QCFType operator =(const QCFType &helper)
+    {
+	if (helper.type)
+	    CFRetain(helper.type);
+	CFTypeRef type2 = type;
+	type = helper.type;
+	if (type2)
+	    CFRelease(type2);
+	return *this;
+    }
+    inline T *operator&() { return &type; }
+    template <typename X> X as() const { return reinterpret_cast<X>(type); }
+    static QCFType constructFromGet(const T &t)
+    {
+        CFRetain(t);
+        return QCFType<T>(t);
+    }
+protected:
+    T type;
+};
+
+class Q_CORE_EXPORT QCFString : public QCFType<CFStringRef>
+{
+public:
+    inline QCFString(const QString &str) : QCFType<CFStringRef>(0), string(str) {}
+    inline QCFString(const CFStringRef cfstr = 0) : QCFType<CFStringRef>(cfstr) {}
+    inline QCFString(const QCFType<CFStringRef> &other) : QCFType<CFStringRef>(other) {}
+    operator QString() const;
+    operator CFStringRef() const;
+    static QString toQString(CFStringRef cfstr);
+    static CFStringRef toCFStringRef(const QString &str);
+#ifdef __OBJC__
+    static QString toQString(const NSString *nsstr);
+    static  NSString *toNSString(const QString &string);
+#endif
+
+private:
+    QString string;
+};
+
+#ifdef Q_OS_IOS
+QSysInfo::MacVersion qt_ios_version();
+#endif
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QCORE_MAC_P_H

src/app/core/backport/qcore_unix.cpp

@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qcore_unix_p.h"
+#include "qelapsedtimer.h"
+
+#ifdef Q_OS_NACL
+#elif !defined (Q_OS_VXWORKS)
+# if !defined(Q_OS_HPUX) || defined(__ia64)
+#  include <sys/select.h>
+# endif
+#  include <sys/time.h>
+#else
+#  include <selectLib.h>
+#endif
+
+#include <stdlib.h>
+
+#ifdef Q_OS_MAC
+#include <mach/mach_time.h>
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+static inline bool time_update(struct timespec *tv, const struct timespec &start,
+                               const struct timespec &timeout)
+{
+    // clock source is (hopefully) monotonic, so we can recalculate how much timeout is left;
+    // if it isn't monotonic, we'll simply hope that it hasn't jumped, because we have no alternative
+    struct timespec now = qt_gettime();
+    *tv = timeout + start - now;
+    return tv->tv_sec >= 0;
+}
+
+int qt_safe_select(int nfds, fd_set *fdread, fd_set *fdwrite, fd_set *fdexcept,
+                   const struct timespec *orig_timeout)
+{
+    if (!orig_timeout) {
+        // no timeout -> block forever
+        int ret;
+        EINTR_LOOP(ret, select(nfds, fdread, fdwrite, fdexcept, 0));
+        return ret;
+    }
+
+    timespec start = qt_gettime();
+    timespec timeout = *orig_timeout;
+
+    // loop and recalculate the timeout as needed
+    int ret;
+    forever {
+#ifndef Q_OS_QNX
+        ret = ::pselect(nfds, fdread, fdwrite, fdexcept, &timeout, 0);
+#else
+        timeval timeoutVal;
+        timeoutVal.tv_sec = timeout.tv_sec;
+        timeoutVal.tv_usec = timeout.tv_nsec / 1000;
+        ret = ::select(nfds, fdread, fdwrite, fdexcept, &timeoutVal);
+#endif
+        if (ret != -1 || errno != EINTR)
+            return ret;
+
+        // recalculate the timeout
+        if (!time_update(&timeout, start, *orig_timeout)) {
+            // timeout during update
+            // or clock reset, fake timeout error
+            return 0;
+        }
+    }
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qcore_unix_p.h

@@ -0,0 +1,335 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QCORE_UNIX_P_H
+#define QCORE_UNIX_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of Qt code on Unix. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qplatformdefs.h"
+#include "qatomic.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef Q_OS_UNIX
+# error "qcore_unix_p.h included on a non-Unix system"
+#endif
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#if defined(Q_OS_VXWORKS)
+#  include <ioLib.h>
+#endif
+
+struct sockaddr;
+
+#if defined(Q_OS_LINUX) && defined(O_CLOEXEC)
+# define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 1
+
+namespace QtLibcSupplement {
+    inline int accept4(int, sockaddr *, QT_SOCKLEN_T *, int)
+    { errno = ENOSYS; return -1; }
+    inline int dup3(int, int, int)
+    { errno = ENOSYS; return -1; }
+    inline int pipe2(int [], int )
+    { errno = ENOSYS; return -1; }
+}
+
+using namespace QT_PREPEND_NAMESPACE(QtLibcSupplement);
+
+#else
+# define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 0
+#endif
+
+#define EINTR_LOOP(var, cmd)                    \
+    do {                                        \
+        var = cmd;                              \
+    } while (var == -1 && errno == EINTR)
+
+
+
+// Internal operator functions for timespecs
+inline timespec &normalizedTimespec(timespec &t)
+{
+    while (t.tv_nsec >= 1000000000) {
+        ++t.tv_sec;
+        t.tv_nsec -= 1000000000;
+    }
+    while (t.tv_nsec < 0) {
+        --t.tv_sec;
+        t.tv_nsec += 1000000000;
+    }
+    return t;
+}
+inline bool operator<(const timespec &t1, const timespec &t2)
+{ return t1.tv_sec < t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_nsec < t2.tv_nsec); }
+inline bool operator==(const timespec &t1, const timespec &t2)
+{ return t1.tv_sec == t2.tv_sec && t1.tv_nsec == t2.tv_nsec; }
+inline timespec &operator+=(timespec &t1, const timespec &t2)
+{
+    t1.tv_sec += t2.tv_sec;
+    t1.tv_nsec += t2.tv_nsec;
+    return normalizedTimespec(t1);
+}
+inline timespec operator+(const timespec &t1, const timespec &t2)
+{
+    timespec tmp;
+    tmp.tv_sec = t1.tv_sec + t2.tv_sec;
+    tmp.tv_nsec = t1.tv_nsec + t2.tv_nsec;
+    return normalizedTimespec(tmp);
+}
+inline timespec operator-(const timespec &t1, const timespec &t2)
+{
+    timespec tmp;
+    tmp.tv_sec = t1.tv_sec - (t2.tv_sec - 1);
+    tmp.tv_nsec = t1.tv_nsec - (t2.tv_nsec + 1000000000);
+    return normalizedTimespec(tmp);
+}
+inline timespec operator*(const timespec &t1, int mul)
+{
+    timespec tmp;
+    tmp.tv_sec = t1.tv_sec * mul;
+    tmp.tv_nsec = t1.tv_nsec * mul;
+    return normalizedTimespec(tmp);
+}
+
+inline void qt_ignore_sigpipe()
+{
+    // Set to ignore SIGPIPE once only.
+    static QBasicAtomicInt atom = Q_BASIC_ATOMIC_INITIALIZER(0);
+    if (!atom.load()) {
+        // More than one thread could turn off SIGPIPE at the same time
+        // But that's acceptable because they all would be doing the same
+        // action
+        struct sigaction noaction;
+        memset(&noaction, 0, sizeof(noaction));
+        noaction.sa_handler = SIG_IGN;
+        ::sigaction(SIGPIPE, &noaction, 0);
+        atom.store(1);
+    }
+}
+
+// don't call QT_OPEN or ::open
+// call qt_safe_open
+static inline int qt_safe_open(const char *pathname, int flags, mode_t mode = 0777)
+{
+#ifdef O_CLOEXEC
+    flags |= O_CLOEXEC;
+#endif
+    int fd;
+    EINTR_LOOP(fd, QT_OPEN(pathname, flags, mode));
+
+    // unknown flags are ignored, so we have no way of verifying if
+    // O_CLOEXEC was accepted
+    if (fd != -1)
+        ::fcntl(fd, F_SETFD, FD_CLOEXEC);
+    return fd;
+}
+#undef QT_OPEN
+#define QT_OPEN         qt_safe_open
+
+#ifndef Q_OS_VXWORKS // no POSIX pipes in VxWorks
+// don't call ::pipe
+// call qt_safe_pipe
+static inline int qt_safe_pipe(int pipefd[2], int flags = 0)
+{
+#ifdef O_CLOEXEC
+    Q_ASSERT((flags & ~(O_CLOEXEC | O_NONBLOCK)) == 0);
+#else
+    Q_ASSERT((flags & ~O_NONBLOCK) == 0);
+#endif
+
+    int ret;
+#if QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC && defined(O_CLOEXEC)
+    // use pipe2
+    flags |= O_CLOEXEC;
+    ret = ::pipe2(pipefd, flags); // pipe2 is Linux-specific and is documented not to return EINTR
+    if (ret == 0 || errno != ENOSYS)
+        return ret;
+#endif
+
+    ret = ::pipe(pipefd);
+    if (ret == -1)
+        return -1;
+
+    ::fcntl(pipefd[0], F_SETFD, FD_CLOEXEC);
+    ::fcntl(pipefd[1], F_SETFD, FD_CLOEXEC);
+
+    // set non-block too?
+    if (flags & O_NONBLOCK) {
+        ::fcntl(pipefd[0], F_SETFL, ::fcntl(pipefd[0], F_GETFL) | O_NONBLOCK);
+        ::fcntl(pipefd[1], F_SETFL, ::fcntl(pipefd[1], F_GETFL) | O_NONBLOCK);
+    }
+
+    return 0;
+}
+
+#endif // Q_OS_VXWORKS
+
+// don't call dup or fcntl(F_DUPFD)
+static inline int qt_safe_dup(int oldfd, int atleast = 0, int flags = FD_CLOEXEC)
+{
+    Q_ASSERT(flags == FD_CLOEXEC || flags == 0);
+
+    int ret;
+#ifdef F_DUPFD_CLOEXEC
+    // use this fcntl
+    if (flags & FD_CLOEXEC) {
+        ret = ::fcntl(oldfd, F_DUPFD_CLOEXEC, atleast);
+        if (ret != -1 || errno != EINVAL)
+            return ret;
+    }
+#endif
+
+    // use F_DUPFD
+    ret = ::fcntl(oldfd, F_DUPFD, atleast);
+
+    if (flags && ret != -1)
+        ::fcntl(ret, F_SETFD, flags);
+    return ret;
+}
+
+// don't call dup2
+// call qt_safe_dup2
+static inline int qt_safe_dup2(int oldfd, int newfd, int flags = FD_CLOEXEC)
+{
+    Q_ASSERT(flags == FD_CLOEXEC || flags == 0);
+
+    int ret;
+#if QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC && defined(O_CLOEXEC)
+    // use dup3
+    if (flags & FD_CLOEXEC) {
+        EINTR_LOOP(ret, ::dup3(oldfd, newfd, O_CLOEXEC));
+        if (ret == 0 || errno != ENOSYS)
+            return ret;
+    }
+#endif
+    EINTR_LOOP(ret, ::dup2(oldfd, newfd));
+    if (ret == -1)
+        return -1;
+
+    if (flags)
+        ::fcntl(newfd, F_SETFD, flags);
+    return 0;
+}
+
+static inline qint64 qt_safe_read(int fd, void *data, qint64 maxlen)
+{
+    qint64 ret = 0;
+    EINTR_LOOP(ret, QT_READ(fd, data, maxlen));
+    return ret;
+}
+#undef QT_READ
+#define QT_READ qt_safe_read
+
+static inline qint64 qt_safe_write(int fd, const void *data, qint64 len)
+{
+    qint64 ret = 0;
+    EINTR_LOOP(ret, QT_WRITE(fd, data, len));
+    return ret;
+}
+#undef QT_WRITE
+#define QT_WRITE qt_safe_write
+
+static inline qint64 qt_safe_write_nosignal(int fd, const void *data, qint64 len)
+{
+    qt_ignore_sigpipe();
+    return qt_safe_write(fd, data, len);
+}
+
+static inline int qt_safe_close(int fd)
+{
+    int ret;
+    EINTR_LOOP(ret, QT_CLOSE(fd));
+    return ret;
+}
+#undef QT_CLOSE
+#define QT_CLOSE qt_safe_close
+
+// - VxWorks doesn't have processes
+#if !defined(Q_OS_VXWORKS)
+static inline int qt_safe_execve(const char *filename, char *const argv[],
+                                 char *const envp[])
+{
+    int ret;
+    EINTR_LOOP(ret, ::execve(filename, argv, envp));
+    return ret;
+}
+
+static inline int qt_safe_execv(const char *path, char *const argv[])
+{
+    int ret;
+    EINTR_LOOP(ret, ::execv(path, argv));
+    return ret;
+}
+
+static inline int qt_safe_execvp(const char *file, char *const argv[])
+{
+    int ret;
+    EINTR_LOOP(ret, ::execvp(file, argv));
+    return ret;
+}
+
+static inline pid_t qt_safe_waitpid(pid_t pid, int *status, int options)
+{
+    int ret;
+    EINTR_LOOP(ret, ::waitpid(pid, status, options));
+    return ret;
+}
+#endif // Q_OS_VXWORKS
+
+#if !defined(_POSIX_MONOTONIC_CLOCK)
+#  define _POSIX_MONOTONIC_CLOCK -1
+#endif
+
+// in qelapsedtimer_mac.cpp or qtimestamp_unix.cpp
+timespec qt_gettime() Q_DECL_NOTHROW;
+void qt_nanosleep(timespec amount);
+
+int qt_safe_select(int nfds, fd_set *fdread, fd_set *fdwrite, fd_set *fdexcept, const struct timespec *tv);
+
+// according to X/OPEN we have to define semun ourselves
+// we use prefix as on some systems sem.h will have it
+struct semid_ds;
+union qt_semun {
+    int val;                    /* value for SETVAL */
+    struct semid_ds *buf;       /* buffer for IPC_STAT, IPC_SET */
+    unsigned short *array;      /* array for GETALL, SETALL */
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif

src/app/core/backport/qfileinfo_p.h

@@ -0,0 +1,164 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFILEINFO_P_H
+#define QFILEINFO_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QFileInfo>
+#include <QDateTime>
+#include "qatomic.h"
+#include <QSharedData>
+#include "qfilesystemengine_p.h"
+#include <QVector>
+
+#include "qabstractfileengine_p.h"
+#include "qfilesystementry_p.h"
+#include "qfilesystemmetadata_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QFileInfoPrivate : public QSharedData
+{
+public:
+    enum { CachedFileFlags=0x01, CachedLinkTypeFlag=0x02, CachedBundleTypeFlag=0x04,
+           CachedMTime=0x10, CachedCTime=0x20, CachedATime=0x40,
+           CachedSize =0x08, CachedPerms=0x80 };
+
+    inline QFileInfoPrivate()
+        : QSharedData(), fileEngine(0),
+        cachedFlags(0),
+        isDefaultConstructed(true),
+        cache_enabled(true), fileFlags(0), fileSize(0)
+    {}
+    inline QFileInfoPrivate(const QFileInfoPrivate &copy)
+        : QSharedData(copy),
+        fileEntry(copy.fileEntry),
+        metaData(copy.metaData),
+        fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)),
+        cachedFlags(0),
+#ifndef QT_NO_FSFILEENGINE
+        isDefaultConstructed(false),
+#else
+        isDefaultConstructed(!fileEngine),
+#endif
+        cache_enabled(copy.cache_enabled), fileFlags(0), fileSize(0)
+    {}
+    inline QFileInfoPrivate(const QString &file)
+        : fileEntry(QDir::fromNativeSeparators(file)),
+        fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)),
+        cachedFlags(0),
+#ifndef QT_NO_FSFILEENGINE
+        isDefaultConstructed(false),
+#else
+        isDefaultConstructed(!fileEngine),
+#endif
+        cache_enabled(true), fileFlags(0), fileSize(0)
+    {
+    }
+
+    inline QFileInfoPrivate(const QFileSystemEntry &file, const QFileSystemMetaData &data)
+        : QSharedData(),
+        fileEntry(file),
+        metaData(data),
+        fileEngine(QFileSystemEngine::resolveEntryAndCreateLegacyEngine(fileEntry, metaData)),
+        cachedFlags(0),
+        isDefaultConstructed(false),
+        cache_enabled(true), fileFlags(0), fileSize(0)
+    {
+        //If the file engine is not null, this maybe a "mount point" for a custom file engine
+        //in which case we can't trust the metadata
+        if (fileEngine)
+            metaData = QFileSystemMetaData();
+    }
+
+    inline QFileInfoPrivate(const QFileSystemEntry &file, const QFileSystemMetaData &data, QAbstractFileEngine *engine)
+        : fileEntry(file),
+        metaData(data),
+        fileEngine(engine),
+        cachedFlags(0),
+#ifndef QT_NO_FSFILEENGINE
+        isDefaultConstructed(false),
+#else
+        isDefaultConstructed(!fileEngine),
+#endif
+        cache_enabled(true), fileFlags(0), fileSize(0)
+    {
+    }
+
+    inline void clearFlags() const {
+        fileFlags = 0;
+        cachedFlags = 0;
+        if (fileEngine)
+            (void)fileEngine->fileFlags(QAbstractFileEngine::Refresh);
+    }
+    inline void clear() {
+        metaData.clear();
+        clearFlags();
+        for (int i = QAbstractFileEngine::NFileNames - 1 ; i >= 0 ; --i)
+            fileNames[i].clear();
+        fileOwners[1].clear();
+        fileOwners[0].clear();
+    }
+
+    uint getFileFlags(QAbstractFileEngine::FileFlags) const;
+    QDateTime &getFileTime(QAbstractFileEngine::FileTime) const;
+    QString getFileName(QAbstractFileEngine::FileName) const;
+    QString getFileOwner(QAbstractFileEngine::FileOwner own) const;
+
+    QFileSystemEntry fileEntry;
+    mutable QFileSystemMetaData metaData;
+
+    QScopedPointer<QAbstractFileEngine> const fileEngine;
+
+    mutable QString fileNames[QAbstractFileEngine::NFileNames];
+    mutable QString fileOwners[2];
+
+    mutable uint cachedFlags : 30;
+    bool const isDefaultConstructed : 1; // QFileInfo is a default constructed instance
+    bool cache_enabled : 1;
+    mutable uint fileFlags;
+    mutable qint64 fileSize;
+    // ### Qt6: FIXME: This vector is essentially a plain array
+    // mutable QDateTime fileTimes[3], but the array is slower
+    // to initialize than the QVector as QDateTime has a pimpl.
+    // In Qt 6, QDateTime should inline its data members,
+    // and this here can be an array again.
+    mutable QVector<QDateTime> fileTimes;
+    inline bool getCachedFlag(uint c) const
+    { return cache_enabled ? (cachedFlags & c) : 0; }
+    inline void setCachedFlag(uint c) const
+    { if (cache_enabled) cachedFlags |= c; }
+
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QFILEINFO_P_H

src/app/core/backport/qfilesystemengine.cpp

@@ -0,0 +1,403 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfilesystemengine_p.h"
+#include <QDir>
+#include <QSet>
+#include <QStringBuilder>
+#include "qabstractfileengine_p.h"
+#ifdef QT_BUILD_CORE_LIB
+#include "qresource_p.h"
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+/*!
+    \internal
+
+    Returns the canonicalized form of \a path (i.e., with all symlinks
+    resolved, and all redundant path elements removed.
+*/
+QString QFileSystemEngine::slowCanonicalized(const QString &path)
+{
+    if (path.isEmpty())
+        return path;
+
+    QFileInfo fi;
+    const QChar slash(QLatin1Char('/'));
+    QString tmpPath = path;
+    int separatorPos = 0;
+    QSet<QString> nonSymlinks;
+    QSet<QString> known;
+
+    known.insert(path);
+    do {
+#ifdef Q_OS_WIN
+        if (separatorPos == 0) {
+            if (tmpPath.size() >= 2 && tmpPath.at(0) == slash && tmpPath.at(1) == slash) {
+                // UNC, skip past the first two elements
+                separatorPos = tmpPath.indexOf(slash, 2);
+            } else if (tmpPath.size() >= 3 && tmpPath.at(1) == QLatin1Char(':') && tmpPath.at(2) == slash) {
+                // volume root, skip since it can not be a symlink
+                separatorPos = 2;
+            }
+        }
+        if (separatorPos != -1)
+#endif
+        separatorPos = tmpPath.indexOf(slash, separatorPos + 1);
+        QString prefix = separatorPos == -1 ? tmpPath : tmpPath.left(separatorPos);
+        if (!nonSymlinks.contains(prefix)) {
+            fi.setFile(prefix);
+            if (fi.isSymLink()) {
+                QString target = fi.symLinkTarget();
+                if(QFileInfo(target).isRelative())
+                    target = fi.absolutePath() + slash + target;
+                if (separatorPos != -1) {
+                    if (fi.isDir() && !target.endsWith(slash))
+                        target.append(slash);
+                    target.append(tmpPath.mid(separatorPos));
+                }
+                tmpPath = QDir::cleanPath(target);
+                separatorPos = 0;
+
+                if (known.contains(tmpPath))
+                    return QString();
+                known.insert(tmpPath);
+            } else {
+                nonSymlinks.insert(prefix);
+            }
+        }
+    } while (separatorPos != -1);
+
+    return QDir::cleanPath(tmpPath);
+}
+
+static inline bool _q_checkEntry(QFileSystemEntry &entry, QFileSystemMetaData &data, bool resolvingEntry)
+{
+    if (resolvingEntry) {
+        if (!QFileSystemEngine::fillMetaData(entry, data, QFileSystemMetaData::ExistsAttribute)
+                || !data.exists()) {
+            data.clear();
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static inline bool _q_checkEntry(QAbstractFileEngine *&engine, bool resolvingEntry)
+{
+    if (resolvingEntry) {
+        if (!(engine->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::ExistsFlag)) {
+            delete engine;
+            engine = 0;
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static bool _q_resolveEntryAndCreateLegacyEngine_recursive(QFileSystemEntry &entry, QFileSystemMetaData &data,
+        QAbstractFileEngine *&engine, bool resolvingEntry = false)
+{
+    QString const &filePath = entry.filePath();
+    if ((engine = qt_custom_file_engine_handler_create(filePath)))
+        return _q_checkEntry(engine, resolvingEntry);
+
+#if defined(QT_BUILD_CORE_LIB)
+    for (int prefixSeparator = 0; prefixSeparator < filePath.size(); ++prefixSeparator) {
+        QChar const ch = filePath[prefixSeparator];
+        if (ch == QLatin1Char('/'))
+            break;
+
+        if (ch == QLatin1Char(':')) {
+            if (prefixSeparator == 0) {
+                engine = new QResourceFileEngine(filePath);
+                return _q_checkEntry(engine, resolvingEntry);
+            }
+
+            if (prefixSeparator == 1)
+                break;
+
+            const QStringList &paths = QDir::searchPaths(filePath.left(prefixSeparator));
+            for (int i = 0; i < paths.count(); i++) {
+                entry = QFileSystemEntry(QDir::cleanPath(paths.at(i) % QLatin1Char('/') % filePath.mid(prefixSeparator + 1)));
+                // Recurse!
+                if (_q_resolveEntryAndCreateLegacyEngine_recursive(entry, data, engine, true))
+                    return true;
+            }
+
+            // entry may have been clobbered at this point.
+            return false;
+        }
+
+        //  There's no need to fully validate the prefix here. Consulting the
+        //  unicode tables could be expensive and validation is already
+        //  performed in QDir::setSearchPaths.
+        //
+        //  if (!ch.isLetterOrNumber())
+        //      break;
+    }
+#endif // defined(QT_BUILD_CORE_LIB)
+
+    return _q_checkEntry(entry, data, resolvingEntry);
+}
+
+/*!
+    \internal
+
+    Resolves the \a entry (see QDir::searchPaths) and returns an engine for
+    it, but never a QFSFileEngine.
+
+    Returns a file engine that can be used to access the entry. Returns 0 if
+    QFileSystemEngine API should be used to query and interact with the file
+    system object.
+*/
+QAbstractFileEngine *QFileSystemEngine::resolveEntryAndCreateLegacyEngine(
+        QFileSystemEntry &entry, QFileSystemMetaData &data) {
+    QFileSystemEntry copy = entry;
+    QAbstractFileEngine *engine = 0;
+
+    if (_q_resolveEntryAndCreateLegacyEngine_recursive(copy, data, engine))
+        // Reset entry to resolved copy.
+        entry = copy;
+    else
+        data.clear();
+
+    return engine;
+}
+
+//these unix functions are in this file, because they are shared by symbian port
+//for open C file handles.
+#ifdef Q_OS_UNIX
+//static
+bool QFileSystemEngine::fillMetaData(int fd, QFileSystemMetaData &data)
+{
+    data.entryFlags &= ~QFileSystemMetaData::PosixStatFlags;
+    data.knownFlagsMask |= QFileSystemMetaData::PosixStatFlags;
+
+    QT_STATBUF statBuffer;
+    if (QT_FSTAT(fd, &statBuffer) == 0) {
+        data.fillFromStatBuf(statBuffer);
+        return true;
+    }
+
+    return false;
+}
+
+#if defined(Q_OS_QNX)
+static void fillStat64fromStat32(struct stat64 *statBuf64, const struct stat &statBuf32)
+{
+    statBuf64->st_mode = statBuf32.st_mode;
+    statBuf64->st_size = statBuf32.st_size;
+    statBuf64->st_ctime = statBuf32.st_ctime;
+    statBuf64->st_mtime = statBuf32.st_mtime;
+    statBuf64->st_atime = statBuf32.st_atime;
+    statBuf64->st_uid = statBuf32.st_uid;
+    statBuf64->st_gid = statBuf32.st_gid;
+}
+#endif
+
+void QFileSystemMetaData::fillFromStatBuf(const QT_STATBUF &statBuffer)
+{
+    // Permissions
+    if (statBuffer.st_mode & S_IRUSR)
+        entryFlags |= QFileSystemMetaData::OwnerReadPermission;
+    if (statBuffer.st_mode & S_IWUSR)
+        entryFlags |= QFileSystemMetaData::OwnerWritePermission;
+    if (statBuffer.st_mode & S_IXUSR)
+        entryFlags |= QFileSystemMetaData::OwnerExecutePermission;
+
+    if (statBuffer.st_mode & S_IRGRP)
+        entryFlags |= QFileSystemMetaData::GroupReadPermission;
+    if (statBuffer.st_mode & S_IWGRP)
+        entryFlags |= QFileSystemMetaData::GroupWritePermission;
+    if (statBuffer.st_mode & S_IXGRP)
+        entryFlags |= QFileSystemMetaData::GroupExecutePermission;
+
+    if (statBuffer.st_mode & S_IROTH)
+        entryFlags |= QFileSystemMetaData::OtherReadPermission;
+    if (statBuffer.st_mode & S_IWOTH)
+        entryFlags |= QFileSystemMetaData::OtherWritePermission;
+    if (statBuffer.st_mode & S_IXOTH)
+        entryFlags |= QFileSystemMetaData::OtherExecutePermission;
+
+    // Type
+    if ((statBuffer.st_mode & S_IFMT) == S_IFREG)
+        entryFlags |= QFileSystemMetaData::FileType;
+    else if ((statBuffer.st_mode & S_IFMT) == S_IFDIR)
+        entryFlags |= QFileSystemMetaData::DirectoryType;
+    else
+        entryFlags |= QFileSystemMetaData::SequentialType;
+
+    // Attributes
+    entryFlags |= QFileSystemMetaData::ExistsAttribute;
+    size_ = statBuffer.st_size;
+#if defined(Q_OS_MACX)
+    if (statBuffer.st_flags & UF_HIDDEN) {
+        entryFlags |= QFileSystemMetaData::HiddenAttribute;
+        knownFlagsMask |= QFileSystemMetaData::HiddenAttribute;
+    }
+#endif
+
+    // Times
+    creationTime_ = statBuffer.st_ctime ? statBuffer.st_ctime : statBuffer.st_mtime;
+    modificationTime_ = statBuffer.st_mtime;
+    accessTime_ = statBuffer.st_atime;
+    userId_ = statBuffer.st_uid;
+    groupId_ = statBuffer.st_gid;
+}
+
+void QFileSystemMetaData::fillFromDirEnt(const QT_DIRENT &entry)
+{
+#if defined(Q_OS_QNX)
+    knownFlagsMask = 0;
+    entryFlags = 0;
+    for (dirent_extra *extra = _DEXTRA_FIRST(&entry); _DEXTRA_VALID(extra, &entry);
+         extra = _DEXTRA_NEXT(extra)) {
+        if (extra->d_type == _DTYPE_STAT || extra->d_type == _DTYPE_LSTAT) {
+
+            const struct dirent_extra_stat * const extra_stat =
+                    reinterpret_cast<struct dirent_extra_stat *>(extra);
+
+            // Remember whether this was a link or not, this saves an lstat() call later.
+            if (extra->d_type == _DTYPE_LSTAT) {
+                knownFlagsMask |= QFileSystemMetaData::LinkType;
+                if (S_ISLNK(extra_stat->d_stat.st_mode))
+                    entryFlags |= QFileSystemMetaData::LinkType;
+            }
+
+            // For symlinks, the extra type _DTYPE_LSTAT doesn't work for filling out the meta data,
+            // as we need the stat() information there, not the lstat() information.
+            // In this case, don't use the extra information.
+            // Unfortunately, readdir() never seems to return extra info of type _DTYPE_STAT, so for
+            // symlinks, we always incur the cost of an extra stat() call later.
+            if (S_ISLNK(extra_stat->d_stat.st_mode) && extra->d_type == _DTYPE_LSTAT)
+                continue;
+
+#if defined(QT_USE_XOPEN_LFS_EXTENSIONS) && defined(QT_LARGEFILE_SUPPORT)
+            // Even with large file support, d_stat is always of type struct stat, not struct stat64,
+            // so it needs to be converted
+            struct stat64 statBuf;
+            fillStat64fromStat32(&statBuf, extra_stat->d_stat);
+            fillFromStatBuf(statBuf);
+#else
+            fillFromStatBuf(extra_stat->d_stat);
+#endif
+            knownFlagsMask |= QFileSystemMetaData::PosixStatFlags;
+            if (!S_ISLNK(extra_stat->d_stat.st_mode)) {
+                knownFlagsMask |= QFileSystemMetaData::ExistsAttribute;
+                entryFlags |= QFileSystemMetaData::ExistsAttribute;
+            }
+        }
+    }
+#elif defined(_DIRENT_HAVE_D_TYPE) || defined(Q_OS_BSD4)
+    // BSD4 includes Mac OS X
+
+    // ### This will clear all entry flags and knownFlagsMask
+    switch (entry.d_type)
+    {
+    case DT_DIR:
+        knownFlagsMask = QFileSystemMetaData::LinkType
+            | QFileSystemMetaData::FileType
+            | QFileSystemMetaData::DirectoryType
+            | QFileSystemMetaData::SequentialType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        entryFlags = QFileSystemMetaData::DirectoryType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        break;
+
+    case DT_BLK:
+    case DT_CHR:
+    case DT_FIFO:
+    case DT_SOCK:
+        // ### System attribute
+        knownFlagsMask = QFileSystemMetaData::LinkType
+            | QFileSystemMetaData::FileType
+            | QFileSystemMetaData::DirectoryType
+            | QFileSystemMetaData::BundleType
+            | QFileSystemMetaData::AliasType
+            | QFileSystemMetaData::SequentialType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        entryFlags = QFileSystemMetaData::SequentialType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        break;
+
+    case DT_LNK:
+        knownFlagsMask = QFileSystemMetaData::LinkType;
+        entryFlags = QFileSystemMetaData::LinkType;
+        break;
+
+    case DT_REG:
+        knownFlagsMask = QFileSystemMetaData::LinkType
+            | QFileSystemMetaData::FileType
+            | QFileSystemMetaData::DirectoryType
+            | QFileSystemMetaData::BundleType
+            | QFileSystemMetaData::SequentialType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        entryFlags = QFileSystemMetaData::FileType
+            | QFileSystemMetaData::ExistsAttribute;
+
+        break;
+
+    case DT_UNKNOWN:
+    default:
+        clear();
+    }
+#else
+    Q_UNUSED(entry)
+#endif
+}
+
+#endif
+
+//static
+QString QFileSystemEngine::resolveUserName(const QFileSystemEntry &entry, QFileSystemMetaData &metaData)
+{
+#if defined(Q_OS_WIN)
+    Q_UNUSED(metaData);
+    return QFileSystemEngine::owner(entry, QAbstractFileEngine::OwnerUser);
+#else //(Q_OS_UNIX)
+    if (!metaData.hasFlags(QFileSystemMetaData::UserId))
+        QFileSystemEngine::fillMetaData(entry, metaData, QFileSystemMetaData::UserId);
+    return resolveUserName(metaData.userId());
+#endif
+}
+
+//static
+QString QFileSystemEngine::resolveGroupName(const QFileSystemEntry &entry, QFileSystemMetaData &metaData)
+{
+#if defined(Q_OS_WIN)
+    Q_UNUSED(metaData);
+    return QFileSystemEngine::owner(entry, QAbstractFileEngine::OwnerGroup);
+#else //(Q_OS_UNIX)
+    if (!metaData.hasFlags(QFileSystemMetaData::GroupId))
+        QFileSystemEngine::fillMetaData(entry, metaData, QFileSystemMetaData::GroupId);
+    return resolveGroupName(metaData.groupId());
+#endif
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qfilesystemengine_p.h

@@ -0,0 +1,120 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFILESYSTEMENGINE_P_H
+#define QFILESYSTEMENGINE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QFile>
+#include "qfilesystementry_p.h"
+#include "qfilesystemmetadata_p.h"
+#include "qsystemerror_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QFileSystemEngine
+{
+public:
+    static bool isCaseSensitive()
+    {
+#ifndef Q_OS_WIN
+        return true;
+#else
+        return false;
+#endif
+    }
+
+    static QFileSystemEntry getLinkTarget(const QFileSystemEntry &link, QFileSystemMetaData &data);
+    static QFileSystemEntry canonicalName(const QFileSystemEntry &entry, QFileSystemMetaData &data);
+    static QFileSystemEntry absoluteName(const QFileSystemEntry &entry);
+    static QByteArray id(const QFileSystemEntry &entry);
+    static QString resolveUserName(const QFileSystemEntry &entry, QFileSystemMetaData &data);
+    static QString resolveGroupName(const QFileSystemEntry &entry, QFileSystemMetaData &data);
+
+#if defined(Q_OS_UNIX)
+    static QString resolveUserName(uint userId);
+    static QString resolveGroupName(uint groupId);
+#endif
+
+#if defined(Q_OS_MACX)
+    static QString bundleName(const QFileSystemEntry &entry);
+#else
+    static QString bundleName(const QFileSystemEntry &entry) { Q_UNUSED(entry) return QString(); }
+#endif
+
+    static bool fillMetaData(const QFileSystemEntry &entry, QFileSystemMetaData &data,
+                             QFileSystemMetaData::MetaDataFlags what);
+#if defined(Q_OS_UNIX)
+    static bool fillMetaData(int fd, QFileSystemMetaData &data); // what = PosixStatFlags
+#endif
+#if defined(Q_OS_WIN)
+
+    static bool uncListSharesOnServer(const QString &server, QStringList *list); //Used also by QFSFileEngineIterator::hasNext()
+    static bool fillMetaData(int fd, QFileSystemMetaData &data,
+                             QFileSystemMetaData::MetaDataFlags what);
+    static bool fillMetaData(HANDLE fHandle, QFileSystemMetaData &data,
+                             QFileSystemMetaData::MetaDataFlags what);
+    static bool fillPermissions(const QFileSystemEntry &entry, QFileSystemMetaData &data,
+                                QFileSystemMetaData::MetaDataFlags what);
+    static QString owner(const QFileSystemEntry &entry, QAbstractFileEngine::FileOwner own);
+    static QString nativeAbsoluteFilePath(const QString &path);
+#endif
+    //homePath, rootPath and tempPath shall return clean paths
+    static QString homePath();
+    static QString rootPath();
+    static QString tempPath();
+
+    static bool createDirectory(const QFileSystemEntry &entry, bool createParents);
+    static bool removeDirectory(const QFileSystemEntry &entry, bool removeEmptyParents);
+
+    static bool createLink(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error);
+
+    static bool copyFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error);
+    static bool renameFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error);
+    static bool removeFile(const QFileSystemEntry &entry, QSystemError &error);
+
+    static bool setPermissions(const QFileSystemEntry &entry, QFile::Permissions permissions, QSystemError &error,
+                               QFileSystemMetaData *data = 0);
+
+    static bool setCurrentPath(const QFileSystemEntry &entry);
+    static QFileSystemEntry currentPath();
+
+    static QAbstractFileEngine *resolveEntryAndCreateLegacyEngine(QFileSystemEntry &entry,
+                                                                  QFileSystemMetaData &data);
+private:
+    static QString slowCanonicalized(const QString &path);
+#if defined(Q_OS_WIN)
+    static void clearWinStatData(QFileSystemMetaData &data);
+#endif
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // include guard

src/app/core/backport/qfilesystemengine_unix.cpp

@@ -0,0 +1,756 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>>
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformdefs.h"
+#include "qfilesystemengine_p.h"
+#include <QFile>
+
+#include <QVarLengthArray>
+
+#include <stdlib.h> // for realpath()
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+
+#if defined(Q_OS_MAC)
+# include "qcore_mac_p.h"
+# include <CoreFoundation/CFBundle.h>
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#if defined(Q_OS_MACX)
+static inline bool _q_isMacHidden(const char *nativePath)
+{
+    OSErr err;
+
+    FSRef fsRef;
+    err = FSPathMakeRefWithOptions(reinterpret_cast<const UInt8 *>(nativePath),
+            kFSPathMakeRefDoNotFollowLeafSymlink, &fsRef, 0);
+    if (err != noErr)
+        return false;
+
+    FSCatalogInfo catInfo;
+    err = FSGetCatalogInfo(&fsRef, kFSCatInfoFinderInfo, &catInfo, NULL, NULL, NULL);
+    if (err != noErr)
+        return false;
+
+    FileInfo * const fileInfo = reinterpret_cast<FileInfo*>(&catInfo.finderInfo);
+    return (fileInfo->finderFlags & kIsInvisible);
+}
+
+static bool isPackage(const QFileSystemMetaData &data, const QFileSystemEntry &entry)
+{
+    if (!data.isDirectory())
+        return false;
+
+    QFileInfo info(entry.filePath());
+    QString suffix = info.suffix();
+
+    // First step: is the extenstion known ?
+    if (suffix == QLatin1String("app")
+            || suffix == QLatin1String("debug")
+            || suffix == QLatin1String("profile")
+            || suffix == QLatin1String("bundle")
+            || suffix == QLatin1String("pkg")) {
+        return true;
+    }
+
+    // Second step: check if an application knows the package type
+    const QByteArray &native = entry.nativeFilePath();
+    const char *nativeFilePath = native.constData();
+    int nativeFilePathLength = native.size();
+
+    QCFType<CFStringRef> path = CFStringCreateWithBytes(0,
+                                                        reinterpret_cast<const UInt8*>(nativeFilePath),
+                                                        nativeFilePathLength,
+                                                        kCFStringEncodingUTF8,
+                                                        false);
+
+    QCFType<CFURLRef> url = CFURLCreateWithFileSystemPath(0, path, kCFURLPOSIXPathStyle, true);
+
+    UInt32 type, creator;
+    // Well created packages have the PkgInfo file
+    if (CFBundleGetPackageInfoInDirectory(url, &type, &creator))
+        return true;
+
+    // Find if an application other than Finder claims to know how to handle the package
+    if (suffix.length() > 0) {
+        QCFType<CFURLRef> application;
+        LSGetApplicationForURL(url,
+                               kLSRolesEditor|kLSRolesViewer|kLSRolesViewer,
+                               NULL,
+                               &application);
+
+        if (application) {
+            CFStringRef path = CFURLGetString(application);
+            QString applicationPath = QCFString::toQString(path);
+            if (applicationPath != QLatin1String("file://localhost/System/Library/CoreServices/Finder.app/"))
+                return true;
+        }
+    }
+
+    // Third step: check if the directory has the package bit set
+    FSRef packageRef;
+    FSPathMakeRef((UInt8 *)nativeFilePath, &packageRef, NULL);
+
+    FSCatalogInfo catalogInfo;
+    FSGetCatalogInfo(&packageRef,
+                     kFSCatInfoFinderInfo,
+                     &catalogInfo,
+                     NULL,
+                     NULL,
+                     NULL);
+
+    FolderInfo *folderInfo = reinterpret_cast<FolderInfo *>(catalogInfo.finderInfo);
+    return folderInfo->finderFlags & kHasBundle;
+}
+
+#else
+static inline bool _q_isMacHidden(const char *nativePath)
+{
+    Q_UNUSED(nativePath);
+    // no-op
+    return false;
+}
+#endif
+
+//static
+QFileSystemEntry QFileSystemEngine::getLinkTarget(const QFileSystemEntry &link, QFileSystemMetaData &data)
+{
+#if defined(__GLIBC__) && !defined(PATH_MAX)
+#define PATH_CHUNK_SIZE 256
+    char *s = 0;
+    int len = -1;
+    int size = PATH_CHUNK_SIZE;
+
+    while (1) {
+        s = (char *) ::realloc(s, size);
+        Q_CHECK_PTR(s);
+        len = ::readlink(link.nativeFilePath().constData(), s, size);
+        if (len < 0) {
+            ::free(s);
+            break;
+        }
+        if (len < size) {
+            break;
+        }
+        size *= 2;
+    }
+#else
+    char s[PATH_MAX+1];
+    int len = readlink(link.nativeFilePath().constData(), s, PATH_MAX);
+#endif
+    if (len > 0) {
+        QString ret;
+        if (!data.hasFlags(QFileSystemMetaData::DirectoryType))
+            fillMetaData(link, data, QFileSystemMetaData::DirectoryType);
+        if (data.isDirectory() && s[0] != '/') {
+            QDir parent(link.filePath());
+            parent.cdUp();
+            ret = parent.path();
+            if (!ret.isEmpty() && !ret.endsWith(QLatin1Char('/')))
+                ret += QLatin1Char('/');
+        }
+        s[len] = '\0';
+        ret += QFile::decodeName(QByteArray(s));
+#if defined(__GLIBC__) && !defined(PATH_MAX)
+        ::free(s);
+#endif
+
+        if (!ret.startsWith(QLatin1Char('/'))) {
+            if (link.filePath().startsWith(QLatin1Char('/'))) {
+                ret.prepend(link.filePath().left(link.filePath().lastIndexOf(QLatin1Char('/')))
+                            + QLatin1Char('/'));
+            } else {
+                ret.prepend(QDir::currentPath() + QLatin1Char('/'));
+            }
+        }
+        ret = QDir::cleanPath(ret);
+        if (ret.size() > 1 && ret.endsWith(QLatin1Char('/')))
+            ret.chop(1);
+        return QFileSystemEntry(ret);
+    }
+#if defined(Q_OS_MACX)
+    {
+        FSRef fref;
+        if (FSPathMakeRef((const UInt8 *)QFile::encodeName(QDir::cleanPath(link.filePath())).data(), &fref, 0) == noErr) {
+            // TODO get the meta data info from the QFileSystemMetaData object
+            Boolean isAlias, isFolder;
+            if (FSResolveAliasFile(&fref, true, &isFolder, &isAlias) == noErr && isAlias) {
+                AliasHandle alias;
+                if (FSNewAlias(0, &fref, &alias) == noErr && alias) {
+                    QCFString cfstr;
+                    if (FSCopyAliasInfo(alias, 0, 0, &cfstr, 0, 0) == noErr)
+                        return QFileSystemEntry(QCFString::toQString(cfstr));
+                }
+            }
+        }
+    }
+#endif
+    return QFileSystemEntry();
+}
+
+//static
+QFileSystemEntry QFileSystemEngine::canonicalName(const QFileSystemEntry &entry, QFileSystemMetaData &data)
+{
+    if (entry.isEmpty() || entry.isRoot())
+        return entry;
+
+#if !defined(Q_OS_MAC) && !defined(Q_OS_QNX) && !defined(Q_OS_ANDROID) && _POSIX_VERSION < 200809L
+    // realpath(X,0) is not supported
+    Q_UNUSED(data);
+    return QFileSystemEntry(slowCanonicalized(absoluteName(entry).filePath()));
+#else
+    char *ret = 0;
+# if defined(Q_OS_MACX)
+    // When using -mmacosx-version-min=10.4, we get the legacy realpath implementation,
+    // which does not work properly with the realpath(X,0) form. See QTBUG-28282.
+    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_6) {
+        ret = (char*)malloc(PATH_MAX + 1);
+        if (ret && realpath(entry.nativeFilePath().constData(), (char*)ret) == 0) {
+            const int savedErrno = errno; // errno is checked below, and free() might change it
+            free(ret);
+            errno = savedErrno;
+            ret = 0;
+        }
+    } else {
+        // on 10.5 we can use FSRef to resolve the file path.
+        QString path = QDir::cleanPath(entry.filePath());
+        FSRef fsref;
+        if (FSPathMakeRef((const UInt8 *)path.toUtf8().data(), &fsref, 0) == noErr) {
+            CFURLRef urlref = CFURLCreateFromFSRef(NULL, &fsref);
+            CFStringRef canonicalPath = CFURLCopyFileSystemPath(urlref, kCFURLPOSIXPathStyle);
+            QString ret = QCFString::toQString(canonicalPath);
+            CFRelease(canonicalPath);
+            CFRelease(urlref);
+            return QFileSystemEntry(ret);
+        }
+    }
+# else
+#  if _POSIX_VERSION >= 200801L
+    ret = realpath(entry.nativeFilePath().constData(), (char*)0);
+#  else
+    ret = (char*)malloc(PATH_MAX + 1);
+    if (realpath(entry.nativeFilePath().constData(), (char*)ret) == 0) {
+        const int savedErrno = errno; // errno is checked below, and free() might change it
+        free(ret);
+        errno = savedErrno;
+        ret = 0;
+    }
+#  endif
+# endif
+    if (ret) {
+        data.knownFlagsMask |= QFileSystemMetaData::ExistsAttribute;
+        data.entryFlags |= QFileSystemMetaData::ExistsAttribute;
+        QString canonicalPath = QDir::cleanPath(QString::fromLocal8Bit(ret));
+        free(ret);
+        return QFileSystemEntry(canonicalPath);
+    } else if (errno == ENOENT) { // file doesn't exist
+        data.knownFlagsMask |= QFileSystemMetaData::ExistsAttribute;
+        data.entryFlags &= ~(QFileSystemMetaData::ExistsAttribute);
+        return QFileSystemEntry();
+    }
+    return entry;
+#endif
+}
+
+//static
+QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
+{
+    if (entry.isAbsolute() && entry.isClean())
+        return entry;
+
+    QByteArray orig = entry.nativeFilePath();
+    QByteArray result;
+    if (orig.isEmpty() || !orig.startsWith('/')) {
+        QFileSystemEntry cur(currentPath());
+        result = cur.nativeFilePath();
+    }
+    if (!orig.isEmpty() && !(orig.length() == 1 && orig[0] == '.')) {
+        if (!result.isEmpty() && !result.endsWith('/'))
+            result.append('/');
+        result.append(orig);
+    }
+
+    if (result.length() == 1 && result[0] == '/')
+        return QFileSystemEntry(result, QFileSystemEntry::FromNativePath());
+    const bool isDir = result.endsWith('/');
+
+    /* as long as QDir::cleanPath() operates on a QString we have to convert to a string here.
+     * ideally we never convert to a string since that loses information. Please fix after
+     * we get a QByteArray version of QDir::cleanPath()
+     */
+    QFileSystemEntry resultingEntry(result, QFileSystemEntry::FromNativePath());
+    QString stringVersion = QDir::cleanPath(resultingEntry.filePath());
+    if (isDir)
+        stringVersion.append(QLatin1Char('/'));
+    return QFileSystemEntry(stringVersion);
+}
+
+//static
+QByteArray QFileSystemEngine::id(const QFileSystemEntry &entry)
+{
+    struct stat statResult;
+    if (stat(entry.nativeFilePath().constData(), &statResult)) {
+        qErrnoWarning("stat() failed for '%s'", entry.nativeFilePath().constData());
+        return QByteArray();
+    }
+    QByteArray result = QByteArray::number(quint64(statResult.st_dev), 16);
+    result += ':';
+    result += QByteArray::number(quint64(statResult.st_ino));
+    return result;
+}
+
+//static
+QString QFileSystemEngine::resolveUserName(uint userId)
+{
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_OPENBSD)
+    int size_max = sysconf(_SC_GETPW_R_SIZE_MAX);
+    if (size_max == -1)
+        size_max = 1024;
+    QVarLengthArray<char, 1024> buf(size_max);
+#endif
+
+    struct passwd *pw = 0;
+#if !defined(Q_OS_INTEGRITY)
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_OPENBSD) && !defined(Q_OS_VXWORKS)
+    struct passwd entry;
+    getpwuid_r(userId, &entry, buf.data(), buf.size(), &pw);
+#else
+    pw = getpwuid(userId);
+#endif
+#endif
+    if (pw)
+        return QFile::decodeName(QByteArray(pw->pw_name));
+    return QString();
+}
+
+//static
+QString QFileSystemEngine::resolveGroupName(uint groupId)
+{
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_OPENBSD)
+    int size_max = sysconf(_SC_GETPW_R_SIZE_MAX);
+    if (size_max == -1)
+        size_max = 1024;
+    QVarLengthArray<char, 1024> buf(size_max);
+#endif
+
+    struct group *gr = 0;
+#if !defined(Q_OS_INTEGRITY)
+#if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_OPENBSD) && !defined(Q_OS_VXWORKS)
+    size_max = sysconf(_SC_GETGR_R_SIZE_MAX);
+    if (size_max == -1)
+        size_max = 1024;
+    buf.resize(size_max);
+    struct group entry;
+    // Some large systems have more members than the POSIX max size
+    // Loop over by doubling the buffer size (upper limit 250k)
+    for (unsigned size = size_max; size < 256000; size += size)
+    {
+        buf.resize(size);
+        // ERANGE indicates that the buffer was too small
+        if (!getgrgid_r(groupId, &entry, buf.data(), buf.size(), &gr)
+            || errno != ERANGE)
+            break;
+    }
+#else
+    gr = getgrgid(groupId);
+#endif
+#endif
+    if (gr)
+        return QFile::decodeName(QByteArray(gr->gr_name));
+    return QString();
+}
+
+#if defined(Q_OS_MACX)
+//static
+QString QFileSystemEngine::bundleName(const QFileSystemEntry &entry)
+{
+    QCFType<CFURLRef> url = CFURLCreateWithFileSystemPath(0, QCFString(entry.filePath()),
+            kCFURLPOSIXPathStyle, true);
+    if (QCFType<CFDictionaryRef> dict = CFBundleCopyInfoDictionaryForURL(url)) {
+        if (CFTypeRef name = (CFTypeRef)CFDictionaryGetValue(dict, kCFBundleNameKey)) {
+            if (CFGetTypeID(name) == CFStringGetTypeID())
+                return QCFString::toQString((CFStringRef)name);
+        }
+    }
+    return QString();
+}
+#endif
+
+//static
+bool QFileSystemEngine::fillMetaData(const QFileSystemEntry &entry, QFileSystemMetaData &data,
+        QFileSystemMetaData::MetaDataFlags what)
+{
+#if defined(Q_OS_MACX)
+    if (what & QFileSystemMetaData::BundleType) {
+        if (!data.hasFlags(QFileSystemMetaData::DirectoryType))
+            what |= QFileSystemMetaData::DirectoryType;
+    }
+    if (what & QFileSystemMetaData::HiddenAttribute) {
+        // Mac OS >= 10.5: st_flags & UF_HIDDEN
+        what |= QFileSystemMetaData::PosixStatFlags;
+    }
+#endif // defined(Q_OS_MACX)
+
+    if (what & QFileSystemMetaData::PosixStatFlags)
+        what |= QFileSystemMetaData::PosixStatFlags;
+
+    if (what & QFileSystemMetaData::ExistsAttribute) {
+        //  FIXME:  Would other queries being performed provide this bit?
+        what |= QFileSystemMetaData::PosixStatFlags;
+    }
+
+    data.entryFlags &= ~what;
+
+    const char * nativeFilePath;
+    int nativeFilePathLength;
+    {
+        const QByteArray &path = entry.nativeFilePath();
+        nativeFilePath = path.constData();
+        nativeFilePathLength = path.size();
+        Q_UNUSED(nativeFilePathLength);
+    }
+
+    bool entryExists = true; // innocent until proven otherwise
+
+    QT_STATBUF statBuffer;
+    bool statBufferValid = false;
+    if (what & QFileSystemMetaData::LinkType) {
+        if (QT_LSTAT(nativeFilePath, &statBuffer) == 0) {
+            if (S_ISLNK(statBuffer.st_mode)) {
+                data.entryFlags |= QFileSystemMetaData::LinkType;
+            } else {
+                statBufferValid = true;
+                data.entryFlags &= ~QFileSystemMetaData::PosixStatFlags;
+            }
+        } else {
+            entryExists = false;
+        }
+
+        data.knownFlagsMask |= QFileSystemMetaData::LinkType;
+    }
+
+    if (statBufferValid || (what & QFileSystemMetaData::PosixStatFlags)) {
+        if (entryExists && !statBufferValid)
+            statBufferValid = (QT_STAT(nativeFilePath, &statBuffer) == 0);
+
+        if (statBufferValid)
+            data.fillFromStatBuf(statBuffer);
+        else {
+            entryExists = false;
+            data.creationTime_ = 0;
+            data.modificationTime_ = 0;
+            data.accessTime_ = 0;
+            data.size_ = 0;
+            data.userId_ = (uint) -2;
+            data.groupId_ = (uint) -2;
+        }
+
+        // reset the mask
+        data.knownFlagsMask |= QFileSystemMetaData::PosixStatFlags
+            | QFileSystemMetaData::ExistsAttribute;
+    }
+
+#if defined(Q_OS_MACX)
+    if (what & QFileSystemMetaData::AliasType)
+    {
+        if (entryExists) {
+            FSRef fref;
+            if (FSPathMakeRef((const UInt8 *)nativeFilePath, &fref, NULL) == noErr) {
+                Boolean isAlias, isFolder;
+                if (FSIsAliasFile(&fref, &isAlias, &isFolder) == noErr) {
+                    if (isAlias)
+                        data.entryFlags |= QFileSystemMetaData::AliasType;
+                }
+            }
+        }
+        data.knownFlagsMask |= QFileSystemMetaData::AliasType;
+    }
+#endif
+
+    if (what & QFileSystemMetaData::UserPermissions) {
+        // calculate user permissions
+
+        if (entryExists) {
+            if (what & QFileSystemMetaData::UserReadPermission) {
+                if (QT_ACCESS(nativeFilePath, R_OK) == 0)
+                    data.entryFlags |= QFileSystemMetaData::UserReadPermission;
+            }
+            if (what & QFileSystemMetaData::UserWritePermission) {
+                if (QT_ACCESS(nativeFilePath, W_OK) == 0)
+                    data.entryFlags |= QFileSystemMetaData::UserWritePermission;
+            }
+            if (what & QFileSystemMetaData::UserExecutePermission) {
+                if (QT_ACCESS(nativeFilePath, X_OK) == 0)
+                    data.entryFlags |= QFileSystemMetaData::UserExecutePermission;
+            }
+        }
+        data.knownFlagsMask |= (what & QFileSystemMetaData::UserPermissions);
+    }
+
+    if (what & QFileSystemMetaData::HiddenAttribute
+            && !data.isHidden()) {
+        QString fileName = entry.fileName();
+        if ((fileName.size() > 0 && fileName.at(0) == QLatin1Char('.'))
+                || (entryExists && _q_isMacHidden(nativeFilePath)))
+            data.entryFlags |= QFileSystemMetaData::HiddenAttribute;
+        data.knownFlagsMask |= QFileSystemMetaData::HiddenAttribute;
+    }
+
+#if defined(Q_OS_MACX)
+    if (what & QFileSystemMetaData::BundleType) {
+        if (entryExists && isPackage(data, entry))
+            data.entryFlags |= QFileSystemMetaData::BundleType;
+
+        data.knownFlagsMask |= QFileSystemMetaData::BundleType;
+    }
+#endif
+    if (!entryExists) {
+        data.clearFlags(what);
+        return false;
+    }
+    return data.hasFlags(what);
+}
+
+//static
+bool QFileSystemEngine::createDirectory(const QFileSystemEntry &entry, bool createParents)
+{
+    QString dirName = entry.filePath();
+    if (createParents) {
+        dirName = QDir::cleanPath(dirName);
+        for (int oldslash = -1, slash=0; slash != -1; oldslash = slash) {
+            slash = dirName.indexOf(QDir::separator(), oldslash+1);
+            if (slash == -1) {
+                if (oldslash == dirName.length())
+                    break;
+                slash = dirName.length();
+            }
+            if (slash) {
+                const QByteArray chunk = QFile::encodeName(dirName.left(slash));
+                if (QT_MKDIR(chunk.constData(), 0777) != 0) {
+                    if (errno == EEXIST
+#if defined(Q_OS_QNX)
+                        // On QNX the QNet (VFS paths of other hosts mounted under a directory
+                        // such as /net) mountpoint returns ENOENT, despite existing. stat()
+                        // on the QNet mountpoint returns successfully and reports S_IFDIR.
+                        || errno == ENOENT
+#endif
+                    ) {
+                        QT_STATBUF st;
+                        if (QT_STAT(chunk.constData(), &st) == 0 && (st.st_mode & S_IFMT) == S_IFDIR)
+                            continue;
+                    }
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+#if defined(Q_OS_DARWIN)  // Mac X doesn't support trailing /'s
+    if (dirName.endsWith(QLatin1Char('/')))
+        dirName.chop(1);
+#endif
+    return (QT_MKDIR(QFile::encodeName(dirName).constData(), 0777) == 0);
+}
+
+//static
+bool QFileSystemEngine::removeDirectory(const QFileSystemEntry &entry, bool removeEmptyParents)
+{
+    if (removeEmptyParents) {
+        QString dirName = QDir::cleanPath(entry.filePath());
+        for (int oldslash = 0, slash=dirName.length(); slash > 0; oldslash = slash) {
+            const QByteArray chunk = QFile::encodeName(dirName.left(slash));
+            QT_STATBUF st;
+            if (QT_STAT(chunk.constData(), &st) != -1) {
+                if ((st.st_mode & S_IFMT) != S_IFDIR)
+                    return false;
+                if (::rmdir(chunk.constData()) != 0)
+                    return oldslash != 0;
+            } else {
+                return false;
+            }
+            slash = dirName.lastIndexOf(QDir::separator(), oldslash-1);
+        }
+        return true;
+    }
+    return rmdir(QFile::encodeName(entry.filePath()).constData()) == 0;
+}
+
+//static
+bool QFileSystemEngine::createLink(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error)
+{
+    if (::symlink(source.nativeFilePath().constData(), target.nativeFilePath().constData()) == 0)
+        return true;
+    error = QSystemError(errno, QSystemError::StandardLibraryError);
+    return false;
+}
+
+//static
+bool QFileSystemEngine::copyFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error)
+{
+    Q_UNUSED(source);
+    Q_UNUSED(target);
+    error = QSystemError(ENOSYS, QSystemError::StandardLibraryError); //Function not implemented
+    return false;
+}
+
+//static
+bool QFileSystemEngine::renameFile(const QFileSystemEntry &source, const QFileSystemEntry &target, QSystemError &error)
+{
+    if (::rename(source.nativeFilePath().constData(), target.nativeFilePath().constData()) == 0)
+        return true;
+    error = QSystemError(errno, QSystemError::StandardLibraryError);
+    return false;
+}
+
+//static
+bool QFileSystemEngine::removeFile(const QFileSystemEntry &entry, QSystemError &error)
+{
+    if (unlink(entry.nativeFilePath().constData()) == 0)
+        return true;
+    error = QSystemError(errno, QSystemError::StandardLibraryError);
+    return false;
+
+}
+
+//static
+bool QFileSystemEngine::setPermissions(const QFileSystemEntry &entry, QFile::Permissions permissions, QSystemError &error, QFileSystemMetaData *data)
+{
+    mode_t mode = 0;
+    if (permissions & QFile::ReadOwner)
+        mode |= S_IRUSR;
+    if (permissions & QFile::WriteOwner)
+        mode |= S_IWUSR;
+    if (permissions & QFile::ExeOwner)
+        mode |= S_IXUSR;
+    if (permissions & QFile::ReadUser)
+        mode |= S_IRUSR;
+    if (permissions & QFile::WriteUser)
+        mode |= S_IWUSR;
+    if (permissions & QFile::ExeUser)
+        mode |= S_IXUSR;
+    if (permissions & QFile::ReadGroup)
+        mode |= S_IRGRP;
+    if (permissions & QFile::WriteGroup)
+        mode |= S_IWGRP;
+    if (permissions & QFile::ExeGroup)
+        mode |= S_IXGRP;
+    if (permissions & QFile::ReadOther)
+        mode |= S_IROTH;
+    if (permissions & QFile::WriteOther)
+        mode |= S_IWOTH;
+    if (permissions & QFile::ExeOther)
+        mode |= S_IXOTH;
+
+    bool success = ::chmod(entry.nativeFilePath().constData(), mode) == 0;
+    if (success && data) {
+        data->entryFlags &= ~QFileSystemMetaData::Permissions;
+        data->entryFlags |= QFileSystemMetaData::MetaDataFlag(uint(permissions));
+        data->knownFlagsMask |= QFileSystemMetaData::Permissions;
+    }
+    if (!success)
+        error = QSystemError(errno, QSystemError::StandardLibraryError);
+    return success;
+}
+
+QString QFileSystemEngine::homePath()
+{
+    QString home = QFile::decodeName(qgetenv("HOME"));
+    if (home.isEmpty())
+        home = rootPath();
+    return QDir::cleanPath(home);
+}
+
+QString QFileSystemEngine::rootPath()
+{
+    return QLatin1String("/");
+}
+
+QString QFileSystemEngine::tempPath()
+{
+#ifdef QT_UNIX_TEMP_PATH_OVERRIDE
+    return QLatin1String(QT_UNIX_TEMP_PATH_OVERRIDE);
+#elif defined(Q_OS_BLACKBERRY)
+    QString temp = QFile::decodeName(qgetenv("TEMP"));
+    if (temp.isEmpty())
+        temp = QFile::decodeName(qgetenv("TMPDIR"));
+
+    if (temp.isEmpty()) {
+        qWarning("Neither the TEMP nor the TMPDIR environment variable is set, falling back to /tmp.");
+        temp = QLatin1String("/tmp/");
+    }
+    return QDir::cleanPath(temp);
+#else
+    QString temp = QFile::decodeName(qgetenv("TMPDIR"));
+    if (temp.isEmpty())
+        temp = QLatin1String("/tmp/");
+    return QDir::cleanPath(temp);
+#endif
+}
+
+bool QFileSystemEngine::setCurrentPath(const QFileSystemEntry &path)
+{
+    int r;
+    r = QT_CHDIR(path.nativeFilePath().constData());
+    return r >= 0;
+}
+
+QFileSystemEntry QFileSystemEngine::currentPath()
+{
+    QFileSystemEntry result;
+    QT_STATBUF st;
+    if (QT_STAT(".", &st) == 0) {
+#if defined(__GLIBC__) && !defined(PATH_MAX)
+        char *currentName = ::get_current_dir_name();
+        if (currentName) {
+            result = QFileSystemEntry(QByteArray(currentName), QFileSystemEntry::FromNativePath());
+            ::free(currentName);
+        }
+#else
+        char currentName[PATH_MAX+1];
+        if (::getcwd(currentName, PATH_MAX)) {
+#if defined(Q_OS_VXWORKS) && defined(VXWORKS_VXSIM)
+            QByteArray dir(currentName);
+            if (dir.indexOf(':') < dir.indexOf('/'))
+                dir.remove(0, dir.indexOf(':')+1);
+
+            qstrncpy(currentName, dir.constData(), PATH_MAX);
+#endif
+            result = QFileSystemEntry(QByteArray(currentName), QFileSystemEntry::FromNativePath());
+        }
+# if defined(QT_DEBUG)
+        if (result.isEmpty())
+            qWarning("QFileSystemEngine::currentPath: getcwd() failed");
+# endif
+#endif
+    } else {
+# if defined(QT_DEBUG)
+        qWarning("QFileSystemEngine::currentPath: stat(\".\") failed");
+# endif
+    }
+    return result;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qfilesystementry.cpp

@@ -0,0 +1,388 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfilesystementry_p.h"
+
+#include <QDir>
+#include <QFile>
+#include "qfsfileengine_p.h"
+#ifdef Q_OS_WIN
+#include <QStringBuilder>
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifdef Q_OS_WIN
+static bool isUncRoot(const QString &server)
+{
+    QString localPath = QDir::toNativeSeparators(server);
+    if (!localPath.startsWith(QLatin1String("\\\\")))
+        return false;
+
+    int idx = localPath.indexOf(QLatin1Char('\\'), 2);
+    if (idx == -1 || idx + 1 == localPath.length())
+        return true;
+
+    localPath = localPath.right(localPath.length() - idx - 1).trimmed();
+    return localPath.isEmpty();
+}
+
+static inline QString fixIfRelativeUncPath(const QString &path)
+{
+    QString currentPath = QDir::currentPath();
+    if (currentPath.startsWith(QLatin1String("//")))
+        return currentPath % QChar(QLatin1Char('/')) % path;
+    return path;
+}
+#endif
+
+QFileSystemEntry::QFileSystemEntry()
+    : m_lastSeparator(-1),
+    m_firstDotInFileName(-1),
+    m_lastDotInFileName(-1)
+{
+}
+
+/*!
+   \internal
+   Use this constructor when the path is supplied by user code, as it may contain a mix
+   of '/' and the native separator.
+ */
+QFileSystemEntry::QFileSystemEntry(const QString &filePath)
+    : m_filePath(QDir::fromNativeSeparators(filePath)),
+    m_lastSeparator(-2),
+    m_firstDotInFileName(-2),
+    m_lastDotInFileName(0)
+{
+}
+
+/*!
+   \internal
+   Use this constructor when the path is guaranteed to be in internal format, i.e. all
+   directory separators are '/' and not the native separator.
+ */
+QFileSystemEntry::QFileSystemEntry(const QString &filePath, FromInternalPath /* dummy */)
+    : m_filePath(filePath),
+    m_lastSeparator(-2),
+    m_firstDotInFileName(-2),
+    m_lastDotInFileName(0)
+{
+}
+
+/*!
+   \internal
+   Use this constructor when the path comes from a native API
+ */
+QFileSystemEntry::QFileSystemEntry(const NativePath &nativeFilePath, FromNativePath /* dummy */)
+    : m_nativeFilePath(nativeFilePath),
+    m_lastSeparator(-2),
+    m_firstDotInFileName(-2),
+    m_lastDotInFileName(0)
+{
+}
+
+QFileSystemEntry::QFileSystemEntry(const QString &filePath, const NativePath &nativeFilePath)
+    : m_filePath(QDir::fromNativeSeparators(filePath)),
+    m_nativeFilePath(nativeFilePath),
+    m_lastSeparator(-2),
+    m_firstDotInFileName(-2),
+    m_lastDotInFileName(0)
+{
+}
+
+QString QFileSystemEntry::filePath() const
+{
+    resolveFilePath();
+    return m_filePath;
+}
+
+QFileSystemEntry::NativePath QFileSystemEntry::nativeFilePath() const
+{
+    resolveNativeFilePath();
+    return m_nativeFilePath;
+}
+
+void QFileSystemEntry::resolveFilePath() const
+{
+    if (m_filePath.isEmpty() && !m_nativeFilePath.isEmpty()) {
+#if defined(QFILESYSTEMENTRY_NATIVE_PATH_IS_UTF16)
+        m_filePath = QDir::fromNativeSeparators(m_nativeFilePath);
+#ifdef Q_OS_WIN
+        if (m_filePath.startsWith(QLatin1String("//?/UNC/")))
+            m_filePath = m_filePath.remove(2,6);
+        if (m_filePath.startsWith(QLatin1String("//?/")))
+            m_filePath = m_filePath.remove(0,4);
+#endif
+#else
+        m_filePath = QDir::fromNativeSeparators(QFile::decodeName(m_nativeFilePath));
+#endif
+    }
+}
+
+void QFileSystemEntry::resolveNativeFilePath() const
+{
+    if (!m_filePath.isEmpty() && m_nativeFilePath.isEmpty()) {
+#ifdef Q_OS_WIN
+        QString filePath = m_filePath;
+        if (isRelative())
+            filePath = fixIfRelativeUncPath(m_filePath);
+        m_nativeFilePath = QFSFileEnginePrivate::longFileName(QDir::toNativeSeparators(filePath));
+#elif defined(QFILESYSTEMENTRY_NATIVE_PATH_IS_UTF16)
+        m_nativeFilePath = QDir::toNativeSeparators(m_filePath);
+#else
+        m_nativeFilePath = QFile::encodeName(QDir::toNativeSeparators(m_filePath));
+#endif
+    }
+}
+
+QString QFileSystemEntry::fileName() const
+{
+    findLastSeparator();
+#if defined(Q_OS_WIN)
+    if (m_lastSeparator == -1 && m_filePath.length() >= 2 && m_filePath.at(1) == QLatin1Char(':'))
+        return m_filePath.mid(2);
+#endif
+    return m_filePath.mid(m_lastSeparator + 1);
+}
+
+QString QFileSystemEntry::path() const
+{
+    findLastSeparator();
+    if (m_lastSeparator == -1) {
+#if defined(Q_OS_WIN)
+        if (m_filePath.length() >= 2 && m_filePath.at(1) == QLatin1Char(':'))
+            return QFSFileEngine::currentPath(m_filePath.left(2));
+#endif
+        return QString(QLatin1Char('.'));
+    }
+    if (m_lastSeparator == 0)
+        return QString(QLatin1Char('/'));
+#if defined(Q_OS_WIN)
+    if (m_lastSeparator == 2 && m_filePath.at(1) == QLatin1Char(':'))
+        return m_filePath.left(m_lastSeparator + 1);
+#endif
+    return m_filePath.left(m_lastSeparator);
+}
+
+QString QFileSystemEntry::baseName() const
+{
+    findFileNameSeparators();
+    int length = -1;
+    if (m_firstDotInFileName >= 0) {
+        length = m_firstDotInFileName;
+        if (m_lastSeparator != -1) // avoid off by one
+            length--;
+    }
+#if defined(Q_OS_WIN)
+    if (m_lastSeparator == -1 && m_filePath.length() >= 2 && m_filePath.at(1) == QLatin1Char(':'))
+        return m_filePath.mid(2, length - 2);
+#endif
+    return m_filePath.mid(m_lastSeparator + 1, length);
+}
+
+QString QFileSystemEntry::completeBaseName() const
+{
+    findFileNameSeparators();
+    int length = -1;
+    if (m_firstDotInFileName >= 0) {
+        length = m_firstDotInFileName + m_lastDotInFileName;
+        if (m_lastSeparator != -1) // avoid off by one
+            length--;
+    }
+#if defined(Q_OS_WIN)
+    if (m_lastSeparator == -1 && m_filePath.length() >= 2 && m_filePath.at(1) == QLatin1Char(':'))
+        return m_filePath.mid(2, length - 2);
+#endif
+    return m_filePath.mid(m_lastSeparator + 1, length);
+}
+
+QString QFileSystemEntry::suffix() const
+{
+    findFileNameSeparators();
+
+    if (m_lastDotInFileName == -1)
+        return QString();
+
+    return m_filePath.mid(qMax((qint16)0, m_lastSeparator) + m_firstDotInFileName + m_lastDotInFileName + 1);
+}
+
+QString QFileSystemEntry::completeSuffix() const
+{
+    findFileNameSeparators();
+    if (m_firstDotInFileName == -1)
+        return QString();
+
+    return m_filePath.mid(qMax((qint16)0, m_lastSeparator) + m_firstDotInFileName + 1);
+}
+
+#if defined(Q_OS_WIN)
+bool QFileSystemEntry::isRelative() const
+{
+    resolveFilePath();
+    return (m_filePath.isEmpty() || (!m_filePath.isEmpty() && (m_filePath[0].unicode() != '/')
+        && (!(m_filePath.length() >= 2 && m_filePath[1].unicode() == ':'))));
+}
+
+bool QFileSystemEntry::isAbsolute() const
+{
+    resolveFilePath();
+    return (!m_filePath.isEmpty() && ((m_filePath.length() >= 3
+                                       && (m_filePath[0].isLetter() && m_filePath[1].unicode() == ':' && m_filePath[2].unicode() == '/'))
+                                      || (m_filePath.length() >= 2 && (m_filePath.at(0) == QLatin1Char('/') && m_filePath.at(1) == QLatin1Char('/')))
+                                      ));
+}
+#else
+bool QFileSystemEntry::isRelative() const
+{
+    return !isAbsolute();
+}
+
+bool QFileSystemEntry::isAbsolute() const
+{
+    resolveFilePath();
+    return (!m_filePath.isEmpty() && (m_filePath[0].unicode() == '/'));
+}
+#endif
+
+#if defined(Q_OS_WIN)
+bool QFileSystemEntry::isDriveRoot() const
+{
+    resolveFilePath();
+    return (m_filePath.length() == 3
+           && m_filePath.at(0).isLetter() && m_filePath.at(1) == QLatin1Char(':')
+           && m_filePath.at(2) == QLatin1Char('/'));
+}
+#endif
+
+bool QFileSystemEntry::isRoot() const
+{
+    resolveFilePath();
+    if (m_filePath == QLatin1String("/")
+#if defined(Q_OS_WIN)
+            || isDriveRoot()
+            || isUncRoot(m_filePath)
+#endif
+            )
+        return true;
+
+    return false;
+}
+
+bool QFileSystemEntry::isEmpty() const
+{
+    return m_filePath.isEmpty() && m_nativeFilePath.isEmpty();
+}
+
+// private methods
+
+void QFileSystemEntry::findLastSeparator() const
+{
+    if (m_lastSeparator == -2) {
+        resolveFilePath();
+        m_lastSeparator = -1;
+        for (int i = m_filePath.size() - 1; i >= 0; --i) {
+            if (m_filePath[i].unicode() == '/') {
+                m_lastSeparator = i;
+                break;
+            }
+        }
+    }
+}
+
+void QFileSystemEntry::findFileNameSeparators() const
+{
+    if (m_firstDotInFileName == -2) {
+        resolveFilePath();
+        int firstDotInFileName = -1;
+        int lastDotInFileName = -1;
+        int lastSeparator = m_lastSeparator;
+
+        int stop;
+        if (lastSeparator < 0) {
+            lastSeparator = -1;
+            stop = 0;
+        } else {
+            stop = lastSeparator;
+        }
+
+        int i = m_filePath.size() - 1;
+        for (; i >= stop; --i) {
+            if (m_filePath[i].unicode() == '.') {
+                firstDotInFileName = lastDotInFileName = i;
+                break;
+            } else if (m_filePath[i].unicode() == '/') {
+                lastSeparator = i;
+                break;
+            }
+        }
+
+        if (lastSeparator != i) {
+            for (--i; i >= stop; --i) {
+                if (m_filePath[i].unicode() == '.')
+                    firstDotInFileName = i;
+                else if (m_filePath[i].unicode() == '/') {
+                    lastSeparator = i;
+                    break;
+                }
+            }
+        }
+        m_lastSeparator = lastSeparator;
+        m_firstDotInFileName = firstDotInFileName == -1 ? -1 : firstDotInFileName - qMax(0, lastSeparator);
+        if (lastDotInFileName == -1)
+            m_lastDotInFileName = -1;
+        else if (firstDotInFileName == lastDotInFileName)
+            m_lastDotInFileName = 0;
+        else
+            m_lastDotInFileName = lastDotInFileName - firstDotInFileName;
+    }
+}
+
+bool QFileSystemEntry::isClean() const
+{
+    resolveFilePath();
+    int dots = 0;
+    bool dotok = true; // checking for ".." or "." starts to relative paths
+    bool slashok = true;
+    for (QString::const_iterator iter = m_filePath.constBegin(); iter != m_filePath.constEnd(); iter++) {
+        if (*iter == QLatin1Char('/')) {
+            if (dots == 1 || dots == 2)
+                return false; // path contains "./" or "../"
+            if (!slashok)
+                return false; // path contains "//"
+            dots = 0;
+            dotok = true;
+            slashok = false;
+        } else if (dotok) {
+            slashok = true;
+            if (*iter == QLatin1Char('.')) {
+                dots++;
+                if (dots > 2)
+                    dotok = false;
+            } else {
+                //path element contains a character other than '.', it's clean
+                dots = 0;
+                dotok = false;
+            }
+        }
+    }
+    return (dots != 1 && dots != 2); // clean if path doesn't end in . or ..
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qfilesystementry_p.h

@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFILESYSTEMENTRY_P_H
+#define QFILESYSTEMENTRY_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QString>
+#include <QByteArray>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#if defined(Q_OS_WIN)
+#define QFILESYSTEMENTRY_NATIVE_PATH_IS_UTF16
+#endif
+
+class QFileSystemEntry
+{
+public:
+
+#ifndef QFILESYSTEMENTRY_NATIVE_PATH_IS_UTF16
+    typedef QByteArray NativePath;
+#else
+    typedef QString NativePath;
+#endif
+    struct FromNativePath{};
+    struct FromInternalPath{};
+
+    QFileSystemEntry();
+    explicit QFileSystemEntry(const QString &filePath);
+
+    QFileSystemEntry(const QString &filePath, FromInternalPath dummy);
+    QFileSystemEntry(const NativePath &nativeFilePath, FromNativePath dummy);
+    QFileSystemEntry(const QString &filePath, const NativePath &nativeFilePath);
+
+    QString filePath() const;
+    QString fileName() const;
+    QString path() const;
+    NativePath nativeFilePath() const;
+    QString baseName() const;
+    QString completeBaseName() const;
+    QString suffix() const;
+    QString completeSuffix() const;
+    bool isAbsolute() const;
+    bool isRelative() const;
+    bool isClean() const;
+
+#if defined(Q_OS_WIN)
+    bool isDriveRoot() const;
+#endif
+    bool isRoot() const;
+
+    bool isEmpty() const;
+    void clear()
+    {
+        *this = QFileSystemEntry();
+    }
+
+private:
+    // creates the QString version out of the bytearray version
+    void resolveFilePath() const;
+    // creates the bytearray version out of the QString version
+    void resolveNativeFilePath() const;
+    // resolves the separator
+    void findLastSeparator() const;
+    // resolves the dots and the separator
+    void findFileNameSeparators() const;
+
+    mutable QString m_filePath; // always has slashes as separator
+    mutable NativePath m_nativeFilePath; // native encoding and separators
+
+    mutable qint16 m_lastSeparator; // index in m_filePath of last separator
+    mutable qint16 m_firstDotInFileName; // index after m_filePath for first dot (.)
+    mutable qint16 m_lastDotInFileName; // index after m_firstDotInFileName for last dot (.)
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // include guard

src/app/core/backport/qfilesystemiterator_p.h

@@ -0,0 +1,94 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFILESYSTEMITERATOR_P_H
+#define QFILESYSTEMITERATOR_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGlobal>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+
+#include <QDir>
+#include <QDirIterator>
+#include <QStringList>
+
+#include "qfilesystementry_p.h"
+#include "qfilesystemmetadata_p.h"
+
+// Platform-specific headers
+#if !defined(Q_OS_WIN)
+#include <QScopedPointer>
+#endif
+
+class QFileSystemIterator
+{
+public:
+    QFileSystemIterator(const QFileSystemEntry &entry, QDir::Filters filters,
+            const QStringList &nameFilters, QDirIterator::IteratorFlags flags
+                = QDirIterator::FollowSymlinks | QDirIterator::Subdirectories);
+    ~QFileSystemIterator();
+
+    bool advance(QFileSystemEntry &fileEntry, QFileSystemMetaData &metaData);
+
+private:
+    QFileSystemEntry::NativePath nativePath;
+
+    // Platform-specific data
+#if defined(Q_OS_WIN)
+    QString dirPath;
+    HANDLE findFileHandle;
+    QStringList uncShares;
+    bool uncFallback;
+    int uncShareIndex;
+    bool onlyDirs;
+#else
+    QT_DIR *dir;
+    QT_DIRENT *dirEntry;
+#if defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_CYGWIN)
+    // for readdir_r
+    QScopedPointer<QT_DIRENT, QScopedPointerPodDeleter> mt_file;
+#if defined(Q_OS_QNX) && defined(__EXT_QNX__READDIR_R)
+    // for _readdir_r
+    size_t direntSize;
+#endif
+#endif
+    int lastError;
+#endif
+
+    Q_DISABLE_COPY(QFileSystemIterator)
+};
+
+#endif // QT_NO_FILESYSTEMITERATOR
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // include guard

src/app/core/backport/qfilesystemiterator_unix.cpp

@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformdefs.h"
+#include "qfilesystemiterator_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+
+#include <stdlib.h>
+#include <errno.h>
+
+QFileSystemIterator::QFileSystemIterator(const QFileSystemEntry &entry, QDir::Filters filters,
+                                         const QStringList &nameFilters, QDirIterator::IteratorFlags flags)
+    : nativePath(entry.nativeFilePath())
+    , dir(0)
+    , dirEntry(0)
+#if defined(Q_OS_QNX) && defined(__EXT_QNX__READDIR_R)
+    , direntSize(0)
+#endif
+    , lastError(0)
+{
+    Q_UNUSED(filters)
+    Q_UNUSED(nameFilters)
+    Q_UNUSED(flags)
+
+    if ((dir = QT_OPENDIR(nativePath.constData())) == 0) {
+        lastError = errno;
+    } else {
+
+        if (!nativePath.endsWith('/'))
+            nativePath.append('/');
+
+#if defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_CYGWIN)
+        // ### Race condition; we should use fpathconf and dirfd().
+        size_t maxPathName = ::pathconf(nativePath.constData(), _PC_NAME_MAX);
+        if (maxPathName == size_t(-1))
+            maxPathName = FILENAME_MAX;
+        maxPathName += sizeof(QT_DIRENT) + 1;
+
+        QT_DIRENT *p = reinterpret_cast<QT_DIRENT*>(::malloc(maxPathName));
+        Q_CHECK_PTR(p);
+
+        mt_file.reset(p);
+#if defined(Q_OS_QNX) && defined(__EXT_QNX__READDIR_R)
+        direntSize = maxPathName;
+
+        // Include extra stat information in the readdir() call (d_stat member of dirent_extra_stat).
+        // This is used in QFileSystemMetaData::fillFromDirEnt() to avoid extra stat() calls when iterating
+        // over directories
+        if (dircntl(dir, D_SETFLAG, D_FLAG_STAT) == -1)
+            lastError = errno;
+#endif
+#endif
+    }
+}
+
+QFileSystemIterator::~QFileSystemIterator()
+{
+    if (dir)
+        QT_CLOSEDIR(dir);
+}
+
+bool QFileSystemIterator::advance(QFileSystemEntry &fileEntry, QFileSystemMetaData &metaData)
+{
+    if (!dir)
+        return false;
+
+#if defined(Q_OS_QNX) && defined(__EXT_QNX__READDIR_R)
+    lastError = _readdir_r(dir, mt_file.data(), &dirEntry, direntSize);
+    if (lastError)
+        return false;
+#elif defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_CYGWIN)
+    lastError = QT_READDIR_R(dir, mt_file.data(), &dirEntry);
+    if (lastError)
+        return false;
+#else
+    // ### add local lock to prevent breaking reentrancy
+    dirEntry = QT_READDIR(dir);
+#endif // _POSIX_THREAD_SAFE_FUNCTIONS
+
+    if (dirEntry) {
+        fileEntry = QFileSystemEntry(nativePath + QByteArray(dirEntry->d_name), QFileSystemEntry::FromNativePath());
+        metaData.fillFromDirEnt(*dirEntry);
+        return true;
+    }
+
+    lastError = errno;
+    return false;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QT_NO_FILESYSTEMITERATOR

src/app/core/backport/qfilesystemiterator_win.cpp

@@ -0,0 +1,129 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#if _WIN32_WINNT < 0x0500
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0500
+#endif
+
+#include "qfilesystemiterator_p.h"
+#include "qfilesystemengine_p.h"
+#include "qplatformdefs.h"
+
+#include <qt_windows.h>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+bool done = true;
+
+QFileSystemIterator::QFileSystemIterator(const QFileSystemEntry &entry, QDir::Filters filters,
+                                         const QStringList &nameFilters, QDirIterator::IteratorFlags flags)
+    : nativePath(entry.nativeFilePath())
+    , dirPath(entry.filePath())
+    , findFileHandle(INVALID_HANDLE_VALUE)
+    , uncFallback(false)
+    , uncShareIndex(0)
+    , onlyDirs(false)
+{
+    Q_UNUSED(nameFilters)
+    Q_UNUSED(flags)
+    if (nativePath.endsWith(QLatin1String(".lnk"))) {
+        QFileSystemMetaData metaData;
+        QFileSystemEntry link = QFileSystemEngine::getLinkTarget(entry, metaData);
+        nativePath = link.nativeFilePath();
+    }
+    if (!nativePath.endsWith(QLatin1Char('\\')))
+        nativePath.append(QLatin1Char('\\'));
+    nativePath.append(QLatin1Char('*'));
+    if (!dirPath.endsWith(QLatin1Char('/')))
+        dirPath.append(QLatin1Char('/'));
+    if ((filters & (QDir::Dirs|QDir::Drives)) && (!(filters & (QDir::Files))))
+        onlyDirs = true;
+}
+
+QFileSystemIterator::~QFileSystemIterator()
+{
+   if (findFileHandle != INVALID_HANDLE_VALUE)
+        FindClose(findFileHandle);
+}
+
+bool QFileSystemIterator::advance(QFileSystemEntry &fileEntry, QFileSystemMetaData &metaData)
+{
+    bool haveData = false;
+    WIN32_FIND_DATA findData;
+
+    if (findFileHandle == INVALID_HANDLE_VALUE && !uncFallback) {
+        haveData = true;
+        int infoLevel = 0 ;         // FindExInfoStandard;
+        DWORD dwAdditionalFlags  = 0;
+#ifndef Q_OS_WINCE
+        if (QSysInfo::windowsVersion() >= QSysInfo::WV_WINDOWS7) {
+            dwAdditionalFlags = 2;  // FIND_FIRST_EX_LARGE_FETCH
+            infoLevel = 1 ;         // FindExInfoBasic;
+        }
+#endif
+        int searchOps =  0;         // FindExSearchNameMatch
+        if (onlyDirs)
+            searchOps = 1 ;         // FindExSearchLimitToDirectories
+        findFileHandle = FindFirstFileEx((const wchar_t *)nativePath.utf16(), FINDEX_INFO_LEVELS(infoLevel), &findData,
+                                         FINDEX_SEARCH_OPS(searchOps), 0, dwAdditionalFlags);
+        if (findFileHandle == INVALID_HANDLE_VALUE) {
+            if (nativePath.startsWith(QLatin1String("\\\\?\\UNC\\"))) {
+                QStringList parts = nativePath.split(QLatin1Char('\\'), QString::SkipEmptyParts);
+                if (parts.count() == 4 && QFileSystemEngine::uncListSharesOnServer(
+                        QLatin1String("\\\\") + parts.at(2), &uncShares)) {
+                    if (uncShares.isEmpty())
+                        return false; // No shares found in the server
+                    else
+                        uncFallback = true;
+                }
+            }
+        }
+    }
+    if (findFileHandle == INVALID_HANDLE_VALUE && !uncFallback)
+        return false;
+    // Retrieve the new file information.
+    if (!haveData) {
+        if (uncFallback) {
+            if (++uncShareIndex >= uncShares.count())
+                return false;
+        } else {
+            if (!FindNextFile(findFileHandle, &findData))
+                return false;
+        }
+    }
+    // Create the new file system entry & meta data.
+    if (uncFallback) {
+        fileEntry = QFileSystemEntry(dirPath + uncShares.at(uncShareIndex));
+        metaData.fillFromFileAttribute(FILE_ATTRIBUTE_DIRECTORY);
+        return true;
+    } else {
+        QString fileName = QString::fromWCharArray(findData.cFileName);
+        fileEntry = QFileSystemEntry(dirPath + fileName);
+        metaData = QFileSystemMetaData();
+        if (!fileName.endsWith(QLatin1String(".lnk"))) {
+            metaData.fillFromFindData(findData, true);
+        }
+        return true;
+    }
+    return false;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qfilesystemmetadata_p.h

@@ -0,0 +1,341 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFILESYSTEMMETADATA_P_H
+#define QFILESYSTEMMETADATA_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qplatformdefs.h"
+#include <QtGlobal>
+#include <QDateTime>
+#include "qabstractfileengine_p.h"
+
+// Platform-specific includes
+#ifdef Q_OS_WIN
+#  include <QtCore/qt_windows.h>
+#  ifndef IO_REPARSE_TAG_SYMLINK
+#     define IO_REPARSE_TAG_SYMLINK (0xA000000CL)
+#  endif
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QFileSystemEngine;
+
+class QFileSystemMetaData
+{
+public:
+    QFileSystemMetaData()
+        : knownFlagsMask(0)
+    {
+    }
+
+    enum MetaDataFlag {
+        // Permissions, overlaps with QFile::Permissions
+        OtherReadPermission = 0x00000004,   OtherWritePermission = 0x00000002,  OtherExecutePermission = 0x00000001,
+        GroupReadPermission = 0x00000040,   GroupWritePermission = 0x00000020,  GroupExecutePermission = 0x00000010,
+        UserReadPermission  = 0x00000400,   UserWritePermission  = 0x00000200,  UserExecutePermission  = 0x00000100,
+        OwnerReadPermission = 0x00004000,   OwnerWritePermission = 0x00002000,  OwnerExecutePermission = 0x00001000,
+
+        OtherPermissions    = OtherReadPermission | OtherWritePermission | OtherExecutePermission,
+        GroupPermissions    = GroupReadPermission | GroupWritePermission | GroupExecutePermission,
+        UserPermissions     = UserReadPermission  | UserWritePermission  | UserExecutePermission,
+        OwnerPermissions    = OwnerReadPermission | OwnerWritePermission | OwnerExecutePermission,
+
+        ReadPermissions     = OtherReadPermission | GroupReadPermission | UserReadPermission | OwnerReadPermission,
+        WritePermissions    = OtherWritePermission | GroupWritePermission | UserWritePermission | OwnerWritePermission,
+        ExecutePermissions  = OtherExecutePermission | GroupExecutePermission | UserExecutePermission | OwnerExecutePermission,
+
+        Permissions         = OtherPermissions | GroupPermissions | UserPermissions | OwnerPermissions,
+
+        // Type
+        LinkType            = 0x00010000,
+        FileType            = 0x00020000,
+        DirectoryType       = 0x00040000,
+#if defined(Q_OS_MACX)
+        BundleType          = 0x00080000,
+        AliasType           = 0x08000000,
+#else
+        BundleType          =        0x0,
+        AliasType           =        0x0,
+#endif
+#if defined(Q_OS_WIN)
+        WinLnkType          = 0x08000000,   // Note: Uses the same position for AliasType on Mac
+#else
+        WinLnkType          =        0x0,
+#endif
+        SequentialType      = 0x00800000,   // Note: overlaps with QAbstractFileEngine::RootFlag
+
+        LegacyLinkType      = LinkType | AliasType | WinLnkType,
+
+        Type                = LinkType | FileType | DirectoryType | BundleType | SequentialType | AliasType,
+
+        // Attributes
+        HiddenAttribute     = 0x00100000,
+        SizeAttribute       = 0x00200000,   // Note: overlaps with QAbstractFileEngine::LocalDiskFlag
+        ExistsAttribute     = 0x00400000,
+
+        Attributes          = HiddenAttribute | SizeAttribute | ExistsAttribute,
+
+        // Times
+        CreationTime        = 0x01000000,   // Note: overlaps with QAbstractFileEngine::Refresh
+        ModificationTime    = 0x02000000,
+        AccessTime          = 0x04000000,
+
+        Times               = CreationTime | ModificationTime | AccessTime,
+
+        // Owner IDs
+        UserId              = 0x10000000,
+        GroupId             = 0x20000000,
+
+        OwnerIds            = UserId | GroupId,
+
+        PosixStatFlags      = QFileSystemMetaData::OtherPermissions
+                            | QFileSystemMetaData::GroupPermissions
+                            | QFileSystemMetaData::OwnerPermissions
+                            | QFileSystemMetaData::FileType
+                            | QFileSystemMetaData::DirectoryType
+                            | QFileSystemMetaData::SequentialType
+                            | QFileSystemMetaData::SizeAttribute
+                            | QFileSystemMetaData::Times
+                            | QFileSystemMetaData::OwnerIds,
+
+#if defined(Q_OS_WIN)
+        WinStatFlags        = QFileSystemMetaData::FileType
+                            | QFileSystemMetaData::DirectoryType
+                            | QFileSystemMetaData::HiddenAttribute
+                            | QFileSystemMetaData::ExistsAttribute
+                            | QFileSystemMetaData::SizeAttribute
+                            | QFileSystemMetaData::Times,
+#endif
+
+        AllMetaDataFlags    = 0xFFFFFFFF
+
+    };
+    Q_DECLARE_FLAGS(MetaDataFlags, MetaDataFlag)
+
+    bool hasFlags(MetaDataFlags flags) const
+    {
+        return ((knownFlagsMask & flags) == flags);
+    }
+
+    MetaDataFlags missingFlags(MetaDataFlags flags)
+    {
+        return flags & ~knownFlagsMask;
+    }
+
+    void clear()
+    {
+        knownFlagsMask = 0;
+    }
+
+    void clearFlags(MetaDataFlags flags = AllMetaDataFlags)
+    {
+        knownFlagsMask &= ~flags;
+    }
+
+    bool exists() const                     { return (entryFlags & ExistsAttribute); }
+
+    bool isLink() const                     { return  (entryFlags & LinkType); }
+    bool isFile() const                     { return (entryFlags & FileType); }
+    bool isDirectory() const                { return (entryFlags & DirectoryType); }
+    bool isBundle() const;
+    bool isAlias() const;
+    bool isLegacyLink() const               { return (entryFlags & LegacyLinkType); }
+    bool isSequential() const               { return (entryFlags & SequentialType); }
+    bool isHidden() const                   { return (entryFlags & HiddenAttribute); }
+#if defined(Q_OS_WIN)
+    bool isLnkFile() const                  { return (entryFlags & WinLnkType); }
+#else
+    bool isLnkFile() const                  { return false; }
+#endif
+
+    qint64 size() const                     { return size_; }
+
+    QFile::Permissions permissions() const  { return QFile::Permissions(Permissions & entryFlags); }
+
+    QDateTime creationTime() const;
+    QDateTime modificationTime() const;
+    QDateTime accessTime() const;
+
+    QDateTime fileTime(QAbstractFileEngine::FileTime time) const;
+    uint userId() const;
+    uint groupId() const;
+    uint ownerId(QAbstractFileEngine::FileOwner owner) const;
+
+#ifdef Q_OS_UNIX
+    void fillFromStatBuf(const QT_STATBUF &statBuffer);
+    void fillFromDirEnt(const QT_DIRENT &statBuffer);
+#endif
+
+#if defined(Q_OS_WIN)
+    inline void fillFromFileAttribute(DWORD fileAttribute, bool isDriveRoot = false);
+    inline void fillFromFindData(WIN32_FIND_DATA &findData, bool setLinkType = false, bool isDriveRoot = false);
+    inline void fillFromFindInfo(BY_HANDLE_FILE_INFORMATION &fileInfo);
+#endif
+private:
+    friend class QFileSystemEngine;
+
+    MetaDataFlags knownFlagsMask;
+    MetaDataFlags entryFlags;
+
+    qint64 size_;
+
+    // Platform-specific data goes here:
+#if defined(Q_OS_WIN)
+    DWORD fileAttribute_;
+    FILETIME creationTime_;
+    FILETIME lastAccessTime_;
+    FILETIME lastWriteTime_;
+#else
+    time_t creationTime_;
+    time_t modificationTime_;
+    time_t accessTime_;
+
+    uint userId_;
+    uint groupId_;
+#endif
+
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QFileSystemMetaData::MetaDataFlags)
+
+#if defined(Q_OS_MACX)
+inline bool QFileSystemMetaData::isBundle() const                   { return (entryFlags & BundleType); }
+inline bool QFileSystemMetaData::isAlias() const                    { return (entryFlags & AliasType); }
+#else
+inline bool QFileSystemMetaData::isBundle() const                   { return false; }
+inline bool QFileSystemMetaData::isAlias() const                    { return false; }
+#endif
+
+#if defined(Q_OS_UNIX) || defined (Q_OS_WIN)
+inline QDateTime QFileSystemMetaData::fileTime(QAbstractFileEngine::FileTime time) const
+{
+    switch (time) {
+    case QAbstractFileEngine::ModificationTime:
+        return modificationTime();
+
+    case QAbstractFileEngine::AccessTime:
+        return accessTime();
+
+    case QAbstractFileEngine::CreationTime:
+        return creationTime();
+    }
+
+    return QDateTime();
+}
+#endif
+
+#if defined(Q_OS_UNIX)
+inline QDateTime QFileSystemMetaData::creationTime() const          { return QDateTime::fromTime_t(creationTime_); }
+inline QDateTime QFileSystemMetaData::modificationTime() const      { return QDateTime::fromTime_t(modificationTime_); }
+inline QDateTime QFileSystemMetaData::accessTime() const            { return QDateTime::fromTime_t(accessTime_); }
+
+inline uint QFileSystemMetaData::userId() const                     { return userId_; }
+inline uint QFileSystemMetaData::groupId() const                    { return groupId_; }
+
+inline uint QFileSystemMetaData::ownerId(QAbstractFileEngine::FileOwner owner) const
+{
+    if (owner == QAbstractFileEngine::OwnerUser)
+        return userId();
+    else
+        return groupId();
+}
+#endif
+
+#if defined(Q_OS_WIN)
+inline uint QFileSystemMetaData::userId() const                     { return (uint) -2; }
+inline uint QFileSystemMetaData::groupId() const                    { return (uint) -2; }
+inline uint QFileSystemMetaData::ownerId(QAbstractFileEngine::FileOwner owner) const
+{
+    if (owner == QAbstractFileEngine::OwnerUser)
+        return userId();
+    else
+        return groupId();
+}
+
+inline void QFileSystemMetaData::fillFromFileAttribute(DWORD fileAttribute,bool isDriveRoot)
+{
+    fileAttribute_ = fileAttribute;
+    // Ignore the hidden attribute for drives.
+    if (!isDriveRoot && (fileAttribute_ & FILE_ATTRIBUTE_HIDDEN))
+        entryFlags |= HiddenAttribute;
+    entryFlags |= ((fileAttribute & FILE_ATTRIBUTE_DIRECTORY) ? DirectoryType: FileType);
+    entryFlags |= ExistsAttribute;
+    knownFlagsMask |= FileType | DirectoryType | HiddenAttribute | ExistsAttribute;
+}
+
+inline void QFileSystemMetaData::fillFromFindData(WIN32_FIND_DATA &findData, bool setLinkType, bool isDriveRoot)
+{
+    fillFromFileAttribute(findData.dwFileAttributes, isDriveRoot);
+    creationTime_ = findData.ftCreationTime;
+    lastAccessTime_ = findData.ftLastAccessTime;
+    lastWriteTime_ = findData.ftLastWriteTime;
+    if (fileAttribute_ & FILE_ATTRIBUTE_DIRECTORY) {
+        size_ = 0;
+    } else {
+        size_ = findData.nFileSizeHigh;
+        size_ <<= 32;
+        size_ += findData.nFileSizeLow;
+    }
+    knownFlagsMask |=  Times | SizeAttribute;
+    if (setLinkType) {
+        knownFlagsMask |=  LinkType;
+        entryFlags &= ~LinkType;
+#if !defined(Q_OS_WINCE)
+        if ((fileAttribute_ & FILE_ATTRIBUTE_REPARSE_POINT)
+            && (findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
+            entryFlags |= LinkType;
+        }
+#endif
+
+    }
+}
+
+inline void QFileSystemMetaData::fillFromFindInfo(BY_HANDLE_FILE_INFORMATION &fileInfo)
+{
+    fillFromFileAttribute(fileInfo.dwFileAttributes);
+    creationTime_ = fileInfo.ftCreationTime;
+    lastAccessTime_ = fileInfo.ftLastAccessTime;
+    lastWriteTime_ = fileInfo.ftLastWriteTime;
+    if (fileAttribute_ & FILE_ATTRIBUTE_DIRECTORY) {
+        size_ = 0;
+    } else {
+        size_ = fileInfo.nFileSizeHigh;
+        size_ <<= 32;
+        size_ += fileInfo.nFileSizeLow;
+    }
+    knownFlagsMask |=  Times | SizeAttribute;
+}
+#endif
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // include guard

src/app/core/backport/qfsfileengine.cpp

@@ -0,0 +1,942 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfsfileengine_p.h"
+#include "qfsfileengine_iterator_p.h"
+#include "qfilesystemengine_p.h"
+#include <QDateTime>
+#include <QDirIterator>
+#include <QSet>
+#include <QDebug>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FSFILEENGINE
+
+#if !defined(Q_OS_WINCE)
+#include <errno.h>
+#endif
+#if defined(Q_OS_UNIX)
+#include "qcore_unix_p.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#if defined(Q_OS_MAC)
+# include "qcore_mac_p.h"
+#endif
+
+#ifdef Q_OS_WIN
+#  ifndef S_ISREG
+#    define S_ISREG(x)   (((x) & S_IFMT) == S_IFREG)
+#  endif
+#  ifndef S_ISCHR
+#    define S_ISCHR(x)   (((x) & S_IFMT) == S_IFCHR)
+#  endif
+#  ifndef S_ISFIFO
+#    define S_ISFIFO(x) false
+#  endif
+#  ifndef S_ISSOCK
+#    define S_ISSOCK(x) false
+#  endif
+#  ifndef INVALID_FILE_ATTRIBUTES
+#    define INVALID_FILE_ATTRIBUTES (DWORD (-1))
+#  endif
+#endif
+
+/*! \class QFSFileEngine
+    \inmodule QtCore
+    \brief The QFSFileEngine class implements Qt's default file engine.
+    \since 4.1
+    \internal
+
+    This class is part of the file engine framework in Qt. If you only want to
+    access files or directories, use QFile, QFileInfo or QDir instead.
+
+    QFSFileEngine is the default file engine for accessing regular files. It
+    is provided for convenience; by subclassing this class, you can alter its
+    behavior slightly, without having to write a complete QAbstractFileEngine
+    subclass. To install your custom file engine, you must also subclass
+    QAbstractFileEngineHandler and create an instance of your handler.
+
+    It can also be useful to create a QFSFileEngine object directly if you
+    need to use the local file system inside QAbstractFileEngine::create(), in
+    order to avoid recursion (as higher-level classes tend to call
+    QAbstractFileEngine::create()).
+*/
+
+//**************** QFSFileEnginePrivate
+QFSFileEnginePrivate::QFSFileEnginePrivate() : QAbstractFileEnginePrivate()
+{
+    init();
+}
+
+/*!
+    \internal
+*/
+void QFSFileEnginePrivate::init()
+{
+    is_sequential = 0;
+    tried_stat = 0;
+#if !defined(Q_OS_WINCE)
+    need_lstat = 1;
+    is_link = 0;
+#endif
+    openMode = QIODevice::NotOpen;
+    fd = -1;
+    fh = 0;
+    lastIOCommand = IOFlushCommand;
+    lastFlushFailed = false;
+    closeFileHandle = false;
+#ifdef Q_OS_WIN
+    fileAttrib = INVALID_FILE_ATTRIBUTES;
+    fileHandle = INVALID_HANDLE_VALUE;
+    mapHandle = NULL;
+#ifndef Q_OS_WINCE
+    cachedFd = -1;
+#endif
+#endif
+}
+
+/*!
+    Constructs a QFSFileEngine for the file name \a file.
+*/
+QFSFileEngine::QFSFileEngine(const QString &file)
+    : QAbstractFileEngine(*new QFSFileEnginePrivate)
+{
+    Q_D(QFSFileEngine);
+    d->fileEntry = QFileSystemEntry(file);
+}
+
+/*!
+    Constructs a QFSFileEngine.
+*/
+QFSFileEngine::QFSFileEngine() : QAbstractFileEngine(*new QFSFileEnginePrivate)
+{
+}
+
+/*!
+    \internal
+*/
+QFSFileEngine::QFSFileEngine(QFSFileEnginePrivate &dd)
+    : QAbstractFileEngine(dd)
+{
+}
+
+/*!
+    Destructs the QFSFileEngine.
+*/
+QFSFileEngine::~QFSFileEngine()
+{
+    Q_D(QFSFileEngine);
+    if (d->closeFileHandle) {
+        if (d->fh) {
+            int ret;
+            do {
+                ret = fclose(d->fh);
+            } while (ret == EOF && errno == EINTR);
+        } else if (d->fd != -1) {
+            int ret;
+            do {
+                ret = QT_CLOSE(d->fd);
+            } while (ret == -1 && errno == EINTR);
+        }
+    }
+    QList<uchar*> keys = d->maps.keys();
+    for (int i = 0; i < keys.count(); ++i)
+        unmap(keys.at(i));
+}
+
+/*!
+    \reimp
+*/
+void QFSFileEngine::setFileName(const QString &file)
+{
+    Q_D(QFSFileEngine);
+    d->init();
+    d->fileEntry = QFileSystemEntry(file);
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::open(QIODevice::OpenMode openMode)
+{
+    Q_D(QFSFileEngine);
+    if (d->fileEntry.isEmpty()) {
+        qWarning("QFSFileEngine::open: No file name specified");
+        setError(QFile::OpenError, QLatin1String("No file name specified"));
+        return false;
+    }
+
+    // Append implies WriteOnly.
+    if (openMode & QFile::Append)
+        openMode |= QFile::WriteOnly;
+
+    // WriteOnly implies Truncate if neither ReadOnly nor Append are sent.
+    if ((openMode & QFile::WriteOnly) && !(openMode & (QFile::ReadOnly | QFile::Append)))
+        openMode |= QFile::Truncate;
+
+    d->openMode = openMode;
+    d->lastFlushFailed = false;
+    d->tried_stat = 0;
+    d->fh = 0;
+    d->fd = -1;
+
+    return d->nativeOpen(openMode);
+}
+
+/*!
+    Opens the file handle \a fh in \a openMode mode. Returns \c true on
+    success; otherwise returns \c false.
+*/
+bool QFSFileEngine::open(QIODevice::OpenMode openMode, FILE *fh)
+{
+    return open(openMode, fh, QFile::DontCloseHandle);
+}
+
+bool QFSFileEngine::open(QIODevice::OpenMode openMode, FILE *fh, QFile::FileHandleFlags handleFlags)
+{
+    Q_D(QFSFileEngine);
+
+    // Append implies WriteOnly.
+    if (openMode & QFile::Append)
+        openMode |= QFile::WriteOnly;
+
+    // WriteOnly implies Truncate if neither ReadOnly nor Append are sent.
+    if ((openMode & QFile::WriteOnly) && !(openMode & (QFile::ReadOnly | QFile::Append)))
+        openMode |= QFile::Truncate;
+
+    d->openMode = openMode;
+    d->lastFlushFailed = false;
+    d->closeFileHandle = (handleFlags & QFile::AutoCloseHandle);
+    d->fileEntry.clear();
+    d->tried_stat = 0;
+    d->fd = -1;
+
+    return d->openFh(openMode, fh);
+}
+
+/*!
+    Opens the file handle \a fh using the open mode \a flags.
+*/
+bool QFSFileEnginePrivate::openFh(QIODevice::OpenMode openMode, FILE *fh)
+{
+    Q_Q(QFSFileEngine);
+    this->fh = fh;
+    fd = -1;
+
+    // Seek to the end when in Append mode.
+    if (openMode & QIODevice::Append) {
+        int ret;
+        do {
+            ret = QT_FSEEK(fh, 0, SEEK_END);
+        } while (ret != 0 && errno == EINTR);
+
+        if (ret != 0) {
+            q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                        qt_error_string(int(errno)));
+
+            this->openMode = QIODevice::NotOpen;
+            this->fh = 0;
+
+            return false;
+        }
+    }
+
+    return true;
+}
+
+/*!
+    Opens the file descriptor \a fd in \a openMode mode. Returns \c true
+    on success; otherwise returns \c false.
+*/
+bool QFSFileEngine::open(QIODevice::OpenMode openMode, int fd)
+{
+    return open(openMode, fd, QFile::DontCloseHandle);
+}
+
+bool QFSFileEngine::open(QIODevice::OpenMode openMode, int fd, QFile::FileHandleFlags handleFlags)
+{
+    Q_D(QFSFileEngine);
+
+    // Append implies WriteOnly.
+    if (openMode & QFile::Append)
+        openMode |= QFile::WriteOnly;
+
+    // WriteOnly implies Truncate if neither ReadOnly nor Append are sent.
+    if ((openMode & QFile::WriteOnly) && !(openMode & (QFile::ReadOnly | QFile::Append)))
+        openMode |= QFile::Truncate;
+
+    d->openMode = openMode;
+    d->lastFlushFailed = false;
+    d->closeFileHandle = (handleFlags & QFile::AutoCloseHandle);
+    d->fileEntry.clear();
+    d->fh = 0;
+    d->fd = -1;
+    d->tried_stat = 0;
+
+    return d->openFd(openMode, fd);
+}
+
+
+/*!
+    Opens the file descriptor \a fd to the file engine, using the open mode \a
+    flags.
+*/
+bool QFSFileEnginePrivate::openFd(QIODevice::OpenMode openMode, int fd)
+{
+    Q_Q(QFSFileEngine);
+    this->fd = fd;
+    fh = 0;
+
+    // Seek to the end when in Append mode.
+    if (openMode & QFile::Append) {
+        int ret;
+        do {
+            ret = QT_LSEEK(fd, 0, SEEK_END);
+        } while (ret == -1 && errno == EINTR);
+
+        if (ret == -1) {
+            q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                        qt_error_string(int(errno)));
+
+            this->openMode = QIODevice::NotOpen;
+            this->fd = -1;
+
+            return false;
+        }
+    }
+
+    return true;
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::close()
+{
+    Q_D(QFSFileEngine);
+    d->openMode = QIODevice::NotOpen;
+    return d->nativeClose();
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::closeFdFh()
+{
+    Q_Q(QFSFileEngine);
+    if (fd == -1 && !fh)
+        return false;
+
+    // Flush the file if it's buffered, and if the last flush didn't fail.
+    bool flushed = !fh || (!lastFlushFailed && q->flush());
+    bool closed = true;
+    tried_stat = 0;
+
+    // Close the file if we created the handle.
+    if (closeFileHandle) {
+        int ret;
+        do {
+            if (fh) {
+                // Close buffered file.
+                ret = fclose(fh) != 0 ? -1 : 0;
+            } else {
+                // Close unbuffered file.
+                ret = QT_CLOSE(fd);
+            }
+        } while (ret == -1 && errno == EINTR);
+
+        // We must reset these guys regardless; calling close again after a
+        // failed close causes crashes on some systems.
+        fh = 0;
+        fd = -1;
+        closed = (ret == 0);
+    }
+
+    // Report errors.
+    if (!flushed || !closed) {
+        if (flushed) {
+            // If not flushed, we want the flush error to fall through.
+            q->setError(QFile::UnspecifiedError, qt_error_string(errno));
+        }
+        return false;
+    }
+
+    return true;
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::flush()
+{
+    Q_D(QFSFileEngine);
+    if ((d->openMode & QIODevice::WriteOnly) == 0) {
+        // Nothing in the write buffers, so flush succeeds in doing
+        // nothing.
+        return true;
+    }
+    return d->nativeFlush();
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::syncToDisk()
+{
+    Q_D(QFSFileEngine);
+    if ((d->openMode & QIODevice::WriteOnly) == 0)
+        return true;
+    return d->nativeSyncToDisk();
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::flushFh()
+{
+    Q_Q(QFSFileEngine);
+
+    // Never try to flush again if the last flush failed. Otherwise you can
+    // get crashes on some systems (AIX).
+    if (lastFlushFailed)
+        return false;
+
+    int ret = fflush(fh);
+
+    lastFlushFailed = (ret != 0);
+    lastIOCommand = QFSFileEnginePrivate::IOFlushCommand;
+
+    if (ret != 0) {
+        q->setError(errno == ENOSPC ? QFile::ResourceError : QFile::WriteError,
+                    qt_error_string(errno));
+        return false;
+    }
+    return true;
+}
+
+/*!
+    \reimp
+*/
+qint64 QFSFileEngine::size() const
+{
+    Q_D(const QFSFileEngine);
+    return d->nativeSize();
+}
+
+#ifndef Q_OS_WIN
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::sizeFdFh() const
+{
+    Q_Q(const QFSFileEngine);
+    const_cast<QFSFileEngine *>(q)->flush();
+
+    tried_stat = 0;
+    metaData.clearFlags(QFileSystemMetaData::SizeAttribute);
+    if (!doStat(QFileSystemMetaData::SizeAttribute))
+        return 0;
+    return metaData.size();
+}
+#endif
+
+/*!
+    \reimp
+*/
+qint64 QFSFileEngine::pos() const
+{
+    Q_D(const QFSFileEngine);
+    return d->nativePos();
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::posFdFh() const
+{
+    if (fh)
+        return qint64(QT_FTELL(fh));
+    return QT_LSEEK(fd, 0, SEEK_CUR);
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::seek(qint64 pos)
+{
+    Q_D(QFSFileEngine);
+    return d->nativeSeek(pos);
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::seekFdFh(qint64 pos)
+{
+    Q_Q(QFSFileEngine);
+
+    // On Windows' stdlib implementation, the results of calling fread and
+    // fwrite are undefined if not called either in sequence, or if preceded
+    // with a call to fflush().
+    if (lastIOCommand != QFSFileEnginePrivate::IOFlushCommand && !q->flush())
+        return false;
+
+    if (pos < 0 || pos != qint64(QT_OFF_T(pos)))
+        return false;
+
+    if (fh) {
+        // Buffered stdlib mode.
+        int ret;
+        do {
+            ret = QT_FSEEK(fh, QT_OFF_T(pos), SEEK_SET);
+        } while (ret != 0 && errno == EINTR);
+
+        if (ret != 0) {
+            q->setError(QFile::ReadError, qt_error_string(int(errno)));
+            return false;
+        }
+    } else {
+        // Unbuffered stdio mode.
+        if (QT_LSEEK(fd, QT_OFF_T(pos), SEEK_SET) == -1) {
+            qWarning() << "QFile::at: Cannot set file position" << pos;
+            q->setError(QFile::PositionError, qt_error_string(errno));
+            return false;
+        }
+    }
+    return true;
+}
+
+/*!
+    \reimp
+*/
+int QFSFileEngine::handle() const
+{
+    Q_D(const QFSFileEngine);
+    return d->nativeHandle();
+}
+
+/*!
+    \reimp
+*/
+qint64 QFSFileEngine::read(char *data, qint64 maxlen)
+{
+    Q_D(QFSFileEngine);
+
+    // On Windows' stdlib implementation, the results of calling fread and
+    // fwrite are undefined if not called either in sequence, or if preceded
+    // with a call to fflush().
+    if (d->lastIOCommand != QFSFileEnginePrivate::IOReadCommand) {
+        flush();
+        d->lastIOCommand = QFSFileEnginePrivate::IOReadCommand;
+    }
+
+    return d->nativeRead(data, maxlen);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::readFdFh(char *data, qint64 len)
+{
+    Q_Q(QFSFileEngine);
+
+    if (len < 0 || len != qint64(size_t(len))) {
+        q->setError(QFile::ReadError, qt_error_string(EINVAL));
+        return -1;
+    }
+
+    qint64 readBytes = 0;
+    bool eof = false;
+
+    if (fh) {
+        // Buffered stdlib mode.
+
+        size_t result;
+        bool retry = true;
+        do {
+            result = fread(data + readBytes, 1, size_t(len - readBytes), fh);
+            eof = feof(fh);
+            if (retry && eof && result == 0) {
+                // On Mac OS, this is needed, e.g., if a file was written to
+                // through another stream since our last read. See test
+                // tst_QFile::appendAndRead
+                QT_FSEEK(fh, QT_FTELL(fh), SEEK_SET); // re-sync stream.
+                retry = false;
+                continue;
+            }
+            readBytes += result;
+        } while (!eof && (result == 0 ? errno == EINTR : readBytes < len));
+
+    } else if (fd != -1) {
+        // Unbuffered stdio mode.
+
+#ifdef Q_OS_WIN
+        int result;
+#else
+        ssize_t result;
+#endif
+        do {
+            result = QT_READ(fd, data + readBytes, size_t(len - readBytes));
+        } while ((result == -1 && errno == EINTR)
+                || (result > 0 && (readBytes += result) < len));
+
+        eof = !(result == -1);
+    }
+
+    if (!eof && readBytes == 0) {
+        readBytes = -1;
+        q->setError(QFile::ReadError, qt_error_string(errno));
+    }
+
+    return readBytes;
+}
+
+/*!
+    \reimp
+*/
+qint64 QFSFileEngine::readLine(char *data, qint64 maxlen)
+{
+    Q_D(QFSFileEngine);
+
+    // On Windows' stdlib implementation, the results of calling fread and
+    // fwrite are undefined if not called either in sequence, or if preceded
+    // with a call to fflush().
+    if (d->lastIOCommand != QFSFileEnginePrivate::IOReadCommand) {
+        flush();
+        d->lastIOCommand = QFSFileEnginePrivate::IOReadCommand;
+    }
+
+    return d->nativeReadLine(data, maxlen);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::readLineFdFh(char *data, qint64 maxlen)
+{
+    Q_Q(QFSFileEngine);
+    if (!fh)
+        return q->QAbstractFileEngine::readLine(data, maxlen);
+
+    QT_OFF_T oldPos = 0;
+#ifdef Q_OS_WIN
+    bool seq = q->isSequential();
+    if (!seq)
+#endif
+        oldPos = QT_FTELL(fh);
+
+    // QIODevice::readLine() passes maxlen - 1 to QFile::readLineData()
+    // because it has made space for the '\0' at the end of data.  But fgets
+    // does the same, so we'd get two '\0' at the end - passing maxlen + 1
+    // solves this.
+    if (!fgets(data, int(maxlen + 1), fh)) {
+        if (!feof(fh))
+            q->setError(QFile::ReadError, qt_error_string(int(errno)));
+        return -1;              // error
+    }
+
+#ifdef Q_OS_WIN
+    if (seq)
+        return qstrlen(data);
+#endif
+
+    qint64 lineLength = QT_FTELL(fh) - oldPos;
+    return lineLength > 0 ? lineLength : qstrlen(data);
+}
+
+/*!
+    \reimp
+*/
+qint64 QFSFileEngine::write(const char *data, qint64 len)
+{
+    Q_D(QFSFileEngine);
+
+    // On Windows' stdlib implementation, the results of calling fread and
+    // fwrite are undefined if not called either in sequence, or if preceded
+    // with a call to fflush().
+    if (d->lastIOCommand != QFSFileEnginePrivate::IOWriteCommand) {
+        flush();
+        d->lastIOCommand = QFSFileEnginePrivate::IOWriteCommand;
+    }
+
+    return d->nativeWrite(data, len);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::writeFdFh(const char *data, qint64 len)
+{
+    Q_Q(QFSFileEngine);
+
+    if (len < 0 || len != qint64(size_t(len))) {
+        q->setError(QFile::WriteError, qt_error_string(EINVAL));
+        return -1;
+    }
+
+    qint64 writtenBytes = 0;
+
+    if (fh) {
+        // Buffered stdlib mode.
+
+        size_t result;
+        do {
+            result = fwrite(data + writtenBytes, 1, size_t(len - writtenBytes), fh);
+            writtenBytes += result;
+        } while (result == 0 ? errno == EINTR : writtenBytes < len);
+
+    } else if (fd != -1) {
+        // Unbuffered stdio mode.
+
+#ifdef Q_OS_WIN
+        int result;
+#else
+        ssize_t result;
+#endif
+        do {
+            result = QT_WRITE(fd, data + writtenBytes, size_t(len - writtenBytes));
+        } while ((result == -1 && errno == EINTR)
+                || (result > 0 && (writtenBytes += result) < len));
+    }
+
+    if (len &&  writtenBytes == 0) {
+        writtenBytes = -1;
+        q->setError(errno == ENOSPC ? QFile::ResourceError : QFile::WriteError, qt_error_string(errno));
+    }
+
+    return writtenBytes;
+}
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+/*!
+    \internal
+*/
+QAbstractFileEngine::Iterator *QFSFileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
+{
+    return new QFSFileEngineIterator(filters, filterNames);
+}
+
+/*!
+    \internal
+*/
+QAbstractFileEngine::Iterator *QFSFileEngine::endEntryList()
+{
+    return 0;
+}
+#endif // QT_NO_FILESYSTEMITERATOR
+
+/*!
+    \internal
+*/
+QStringList QFSFileEngine::entryList(QDir::Filters filters, const QStringList &filterNames) const
+{
+    return QAbstractFileEngine::entryList(filters, filterNames);
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::isSequential() const
+{
+    Q_D(const QFSFileEngine);
+    if (d->is_sequential == 0)
+        d->is_sequential = d->nativeIsSequential() ? 1 : 2;
+    return d->is_sequential == 1;
+}
+
+/*!
+    \internal
+*/
+#ifdef Q_OS_UNIX
+bool QFSFileEnginePrivate::isSequentialFdFh() const
+{
+    if (doStat(QFileSystemMetaData::SequentialType))
+        return metaData.isSequential();
+    return true;
+}
+#endif
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::extension(Extension extension, const ExtensionOption *option, ExtensionReturn *output)
+{
+    Q_D(QFSFileEngine);
+    if (extension == AtEndExtension && d->fh && isSequential())
+        return feof(d->fh);
+
+    if (extension == MapExtension) {
+        const MapExtensionOption *options = (MapExtensionOption*)(option);
+        MapExtensionReturn *returnValue = static_cast<MapExtensionReturn*>(output);
+        returnValue->address = d->map(options->offset, options->size, options->flags);
+        return (returnValue->address != 0);
+    }
+    if (extension == UnMapExtension) {
+        UnMapExtensionOption *options = (UnMapExtensionOption*)option;
+        return d->unmap(options->address);
+    }
+
+    return false;
+}
+
+/*!
+    \reimp
+*/
+bool QFSFileEngine::supportsExtension(Extension extension) const
+{
+    Q_D(const QFSFileEngine);
+    if (extension == AtEndExtension && d->fh && isSequential())
+        return true;
+    if (extension == FastReadLineExtension && d->fh)
+        return true;
+    if (extension == FastReadLineExtension && d->fd != -1 && isSequential())
+        return true;
+    if (extension == UnMapExtension || extension == MapExtension)
+        return true;
+    return false;
+}
+
+/*! \fn bool QFSFileEngine::caseSensitive() const
+  Returns \c true for Windows, false for Unix.
+*/
+
+/*! \fn bool QFSFileEngine::copy(const QString &copyName)
+
+  For windows, copy the file to file \a copyName.
+
+  Not implemented for Unix.
+*/
+
+/*! \fn QString QFSFileEngine::currentPath(const QString &fileName)
+  For Unix, returns the current working directory for the file
+  engine.
+
+  For Windows, returns the canonicalized form of the current path used
+  by the file engine for the drive specified by \a fileName.  On
+  Windows, each drive has its own current directory, so a different
+  path is returned for file names that include different drive names
+  (e.g. A: or C:).
+
+  \sa setCurrentPath()
+*/
+
+/*! \fn QFileInfoList QFSFileEngine::drives()
+  For Windows, returns the list of drives in the file system as a list
+  of QFileInfo objects. On unix, Mac OS X and Windows CE, only the
+  root path is returned.  On Windows, this function returns all drives
+  (A:\, C:\, D:\, etc.).
+
+  For Unix, the list contains just the root path "/".
+*/
+
+/*! \fn QString QFSFileEngine::fileName(FileName file) const
+  \reimp
+*/
+
+/*! \fn QDateTime QFSFileEngine::fileTime(FileTime time) const
+  \reimp
+*/
+
+/*! \fn QString QFSFileEngine::homePath()
+  Returns the home path of the current user.
+
+  \sa rootPath()
+*/
+
+/*! \fn bool QFSFileEngine::isRelativePath() const
+  \reimp
+*/
+
+/*! \fn bool QFSFileEngine::link(const QString &newName)
+
+  Creates a link from the file currently specified by fileName() to
+  \a newName. What a link is depends on the underlying filesystem
+  (be it a shortcut on Windows or a symbolic link on Unix). Returns
+  true if successful; otherwise returns \c false.
+*/
+
+/*! \fn bool QFSFileEngine::mkdir(const QString &name, bool createParentDirectories) const
+  \reimp
+*/
+
+/*! \fn uint QFSFileEngine::ownerId(FileOwner own) const
+  In Unix, if stat() is successful, the \c uid is returned if
+  \a own is the owner. Otherwise the \c gid is returned. If stat()
+  is unsuccessful, -2 is reuturned.
+
+  For Windows, -2 is always returned.
+*/
+
+/*! \fn QString QFSFileEngine::owner(FileOwner own) const
+  \reimp
+*/
+
+/*! \fn bool QFSFileEngine::remove()
+  \reimp
+*/
+
+/*! \fn bool QFSFileEngine::rename(const QString &newName)
+  \reimp
+*/
+
+
+/*! \fn bool QFSFileEngine::renameOverwrite(const QString &newName)
+  \reimp
+*/
+
+/*! \fn bool QFSFileEngine::rmdir(const QString &name, bool recurseParentDirectories) const
+  \reimp
+*/
+
+/*! \fn QString QFSFileEngine::rootPath()
+  Returns the root path.
+
+  \sa homePath()
+*/
+
+/*! \fn bool QFSFileEngine::setCurrentPath(const QString &path)
+  Sets the current path (e.g., for QDir), to \a path. Returns \c true if the
+  new path exists; otherwise this function does nothing, and returns \c false.
+
+  \sa currentPath()
+*/
+
+/*! \fn bool QFSFileEngine::setPermissions(uint perms)
+  \reimp
+*/
+
+/*! \fn bool QFSFileEngine::setSize(qint64 size)
+  \reimp
+*/
+
+/*! \fn QString QFSFileEngine::tempPath()
+  Returns the temporary path (i.e., a path in which it is safe
+  to store temporary files).
+*/
+
+/*! \fn QAbstractFileEngine::FileFlags QFSFileEnginePrivate::getPermissions(QAbstractFileEngine::FileFlags type) const
+    \internal
+*/
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QT_NO_FSFILEENGINE

src/app/core/backport/qfsfileengine_iterator.cpp

@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfsfileengine_iterator_p.h"
+#include "qfileinfo_p.h"
+#include <QVariant>
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+QFSFileEngineIterator::QFSFileEngineIterator(QDir::Filters filters, const QStringList &filterNames)
+    : QAbstractFileEngineIterator(filters, filterNames)
+    , done(false)
+{
+}
+
+QFSFileEngineIterator::~QFSFileEngineIterator()
+{
+}
+
+bool QFSFileEngineIterator::hasNext() const
+{
+    if (!done && !nativeIterator) {
+        nativeIterator.reset(new QFileSystemIterator(QFileSystemEntry(path()),
+                    filters(), nameFilters()));
+        advance();
+    }
+
+    return !done;
+}
+
+QString QFSFileEngineIterator::next()
+{
+    if (!hasNext())
+        return QString();
+
+    advance();
+    return currentFilePath();
+}
+
+void QFSFileEngineIterator::advance() const
+{
+    currentInfo = nextInfo;
+
+    QFileSystemEntry entry;
+    QFileSystemMetaData data;
+    if (nativeIterator->advance(entry, data)) {
+        nextInfo = QFileInfo(new QFileInfoPrivate(entry, data));
+    } else {
+        done = true;
+        nativeIterator.reset();
+    }
+}
+
+QString QFSFileEngineIterator::currentFileName() const
+{
+    return currentInfo.fileName();
+}
+
+QFileInfo QFSFileEngineIterator::currentFileInfo() const
+{
+    return currentInfo;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QT_NO_FILESYSTEMITERATOR

src/app/core/backport/qfsfileengine_iterator_p.h

@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFSFILEENGINE_ITERATOR_P_H
+#define QFSFILEENGINE_ITERATOR_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qabstractfileengine_p.h"
+#include "qfilesystemiterator_p.h"
+#include <QDir>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+
+class QFSFileEngineIteratorPrivate;
+class QFSFileEngineIteratorPlatformSpecificData;
+
+class QFSFileEngineIterator : public QAbstractFileEngineIterator
+{
+public:
+    QFSFileEngineIterator(QDir::Filters filters, const QStringList &filterNames);
+    ~QFSFileEngineIterator();
+
+    QString next();
+    bool hasNext() const;
+
+    QString currentFileName() const;
+    QFileInfo currentFileInfo() const;
+
+private:
+    void advance() const;
+    mutable QScopedPointer<QFileSystemIterator> nativeIterator;
+    mutable QFileInfo currentInfo;
+    mutable QFileInfo nextInfo;
+    mutable bool done;
+};
+
+#endif // QT_NO_FILESYSTEMITERATOR
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QFSFILEENGINE_ITERATOR_P_H

src/app/core/backport/qfsfileengine_p.h

@@ -0,0 +1,218 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFSFILEENGINE_P_H
+#define QFSFILEENGINE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qplatformdefs.h"
+#include "qabstractfileengine_p.h"
+#include "qfilesystementry_p.h"
+#include "qfilesystemmetadata_p.h"
+#include <QHash>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FSFILEENGINE
+
+#if defined(Q_OS_WINCE_STD) && _WIN32_WCE < 0x600
+#define Q_USE_DEPRECATED_MAP_API 1
+#endif
+
+class QFSFileEnginePrivate;
+
+class QFSFileEngine : public QAbstractFileEngine
+{
+    Q_DECLARE_PRIVATE(QFSFileEngine)
+public:
+    QFSFileEngine();
+    explicit QFSFileEngine(const QString &file);
+    ~QFSFileEngine();
+
+    bool open(QIODevice::OpenMode openMode);
+    bool open(QIODevice::OpenMode flags, FILE *fh);
+    bool close();
+    bool flush();
+    bool syncToDisk();
+    qint64 size() const;
+    qint64 pos() const;
+    bool seek(qint64);
+    bool isSequential() const;
+    bool remove();
+    bool copy(const QString &newName);
+    bool rename(const QString &newName);
+    bool renameOverwrite(const QString &newName);
+    bool link(const QString &newName);
+    bool mkdir(const QString &dirName, bool createParentDirectories) const;
+    bool rmdir(const QString &dirName, bool recurseParentDirectories) const;
+    bool setSize(qint64 size);
+    bool caseSensitive() const;
+    bool isRelativePath() const;
+    QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const;
+    FileFlags fileFlags(FileFlags type) const;
+    bool setPermissions(uint perms);
+    QString fileName(FileName file) const;
+    uint ownerId(FileOwner) const;
+    QString owner(FileOwner) const;
+    QDateTime fileTime(FileTime time) const;
+    void setFileName(const QString &file);
+    int handle() const;
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+    Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames);
+    Iterator *endEntryList();
+#endif
+
+    qint64 read(char *data, qint64 maxlen);
+    qint64 readLine(char *data, qint64 maxlen);
+    qint64 write(const char *data, qint64 len);
+
+    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
+    bool supportsExtension(Extension extension) const;
+
+    //FS only!!
+    bool open(QIODevice::OpenMode flags, int fd);
+    bool open(QIODevice::OpenMode flags, int fd, QFile::FileHandleFlags handleFlags);
+    bool open(QIODevice::OpenMode flags, FILE *fh, QFile::FileHandleFlags handleFlags);
+    static bool setCurrentPath(const QString &path);
+    static QString currentPath(const QString &path = QString());
+    static QString homePath();
+    static QString rootPath();
+    static QString tempPath();
+    static QFileInfoList drives();
+
+protected:
+    QFSFileEngine(QFSFileEnginePrivate &dd);
+};
+
+class QFSFileEnginePrivate : public QAbstractFileEnginePrivate
+{
+    Q_DECLARE_PUBLIC(QFSFileEngine)
+
+public:
+#ifdef Q_OS_WIN
+    static QString longFileName(const QString &path);
+#endif
+
+    QFileSystemEntry fileEntry;
+    QIODevice::OpenMode openMode;
+
+    bool nativeOpen(QIODevice::OpenMode openMode);
+    bool openFh(QIODevice::OpenMode flags, FILE *fh);
+    bool openFd(QIODevice::OpenMode flags, int fd);
+    bool nativeClose();
+    bool closeFdFh();
+    bool nativeFlush();
+    bool nativeSyncToDisk();
+    bool flushFh();
+    qint64 nativeSize() const;
+#ifndef Q_OS_WIN
+    qint64 sizeFdFh() const;
+#endif
+    qint64 nativePos() const;
+    qint64 posFdFh() const;
+    bool nativeSeek(qint64);
+    bool seekFdFh(qint64);
+    qint64 nativeRead(char *data, qint64 maxlen);
+    qint64 readFdFh(char *data, qint64 maxlen);
+    qint64 nativeReadLine(char *data, qint64 maxlen);
+    qint64 readLineFdFh(char *data, qint64 maxlen);
+    qint64 nativeWrite(const char *data, qint64 len);
+    qint64 writeFdFh(const char *data, qint64 len);
+    int nativeHandle() const;
+    bool nativeIsSequential() const;
+#ifndef Q_OS_WIN
+    bool isSequentialFdFh() const;
+#endif
+
+    uchar *map(qint64 offset, qint64 size, QFile::MemoryMapFlags flags);
+    bool unmap(uchar *ptr);
+
+    mutable QFileSystemMetaData metaData;
+
+    FILE *fh;
+
+#ifdef Q_OS_WIN
+    HANDLE fileHandle;
+    HANDLE mapHandle;
+    QHash<uchar *, DWORD /* offset % AllocationGranularity */> maps;
+
+#ifndef Q_OS_WINCE
+    mutable int cachedFd;
+#endif
+
+    mutable DWORD fileAttrib;
+#else
+    QHash<uchar *, QPair<int /*offset % PageSize*/, size_t /*length + offset % PageSize*/> > maps;
+#endif
+    int fd;
+
+    enum LastIOCommand
+    {
+        IOFlushCommand,
+        IOReadCommand,
+        IOWriteCommand
+    };
+    LastIOCommand  lastIOCommand;
+    bool lastFlushFailed;
+    bool closeFileHandle;
+
+    mutable uint is_sequential : 2;
+    mutable uint could_stat : 1;
+    mutable uint tried_stat : 1;
+#if !defined(Q_OS_WINCE)
+    mutable uint need_lstat : 1;
+    mutable uint is_link : 1;
+#endif
+
+#if defined(Q_OS_WIN)
+    bool doStat(QFileSystemMetaData::MetaDataFlags flags) const;
+#else
+    bool doStat(QFileSystemMetaData::MetaDataFlags flags = QFileSystemMetaData::PosixStatFlags) const;
+#endif
+    bool isSymlink() const;
+
+#if defined(Q_OS_WIN32)
+    int sysOpen(const QString &, int flags);
+#endif
+
+protected:
+    QFSFileEnginePrivate();
+
+    void init();
+
+    QAbstractFileEngine::FileFlags getPermissions(QAbstractFileEngine::FileFlags type) const;
+};
+
+#endif // QT_NO_FSFILEENGINE
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QFSFILEENGINE_P_H

src/app/core/backport/qfsfileengine_unix.cpp

@@ -0,0 +1,749 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformdefs.h"
+#include "qabstractfileengine_p.h"
+#include "qfsfileengine_p.h"
+#include "qcore_unix_p.h"
+#include "qfilesystementry_p.h"
+#include "qfilesystemengine_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_FSFILEENGINE
+
+#include <QFile>
+#include <QDir>
+#include <QDateTime>
+#include <QVarLengthArray>
+
+#include <sys/mman.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <errno.h>
+#if !defined(QWS) && defined(Q_OS_MAC)
+# include "qcore_mac_p.h"
+#endif
+
+/*!
+    \internal
+
+    Returns the stdlib open string corresponding to a QIODevice::OpenMode.
+*/
+static inline QByteArray openModeToFopenMode(QIODevice::OpenMode flags, const QFileSystemEntry &fileEntry,
+        QFileSystemMetaData &metaData)
+{
+    QByteArray mode;
+    if ((flags & QIODevice::ReadOnly) && !(flags & QIODevice::Truncate)) {
+        mode = "rb";
+        if (flags & QIODevice::WriteOnly) {
+            metaData.clearFlags(QFileSystemMetaData::FileType);
+            if (!fileEntry.isEmpty()
+                    && QFileSystemEngine::fillMetaData(fileEntry, metaData, QFileSystemMetaData::FileType)
+                    && metaData.isFile()) {
+                mode += '+';
+            } else {
+                mode = "wb+";
+            }
+        }
+    } else if (flags & QIODevice::WriteOnly) {
+        mode = "wb";
+        if (flags & QIODevice::ReadOnly)
+            mode += '+';
+    }
+    if (flags & QIODevice::Append) {
+        mode = "ab";
+        if (flags & QIODevice::ReadOnly)
+            mode += '+';
+    }
+
+#if defined(__GLIBC__) && (__GLIBC__ * 0x100 + __GLIBC_MINOR__) >= 0x0207
+    // must be glibc >= 2.7
+    mode += 'e';
+#endif
+
+    return mode;
+}
+
+/*!
+    \internal
+
+    Returns the stdio open flags corresponding to a QIODevice::OpenMode.
+*/
+static inline int openModeToOpenFlags(QIODevice::OpenMode mode)
+{
+    int oflags = QT_OPEN_RDONLY;
+#ifdef QT_LARGEFILE_SUPPORT
+    oflags |= QT_OPEN_LARGEFILE;
+#endif
+
+    if ((mode & QFile::ReadWrite) == QFile::ReadWrite) {
+        oflags = QT_OPEN_RDWR | QT_OPEN_CREAT;
+    } else if (mode & QFile::WriteOnly) {
+        oflags = QT_OPEN_WRONLY | QT_OPEN_CREAT;
+    }
+
+    if (mode & QFile::Append) {
+        oflags |= QT_OPEN_APPEND;
+    } else if (mode & QFile::WriteOnly) {
+        if ((mode & QFile::Truncate) || !(mode & QFile::ReadOnly))
+            oflags |= QT_OPEN_TRUNC;
+    }
+
+    return oflags;
+}
+
+/*!
+    \internal
+
+    Sets the file descriptor to close on exec. That is, the file
+    descriptor is not inherited by child processes.
+*/
+static inline bool setCloseOnExec(int fd)
+{
+    return fd != -1 && fcntl(fd, F_SETFD, FD_CLOEXEC) != -1;
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
+{
+    Q_Q(QFSFileEngine);
+
+    if (openMode & QIODevice::Unbuffered) {
+        int flags = openModeToOpenFlags(openMode);
+
+        // Try to open the file in unbuffered mode.
+        do {
+            fd = QT_OPEN(fileEntry.nativeFilePath().constData(), flags, 0666);
+        } while (fd == -1 && errno == EINTR);
+
+        // On failure, return and report the error.
+        if (fd == -1) {
+            q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                        qt_error_string(errno));
+            return false;
+        }
+
+        if (!(openMode & QIODevice::WriteOnly)) {
+            // we don't need this check if we tried to open for writing because then
+            // we had received EISDIR anyway.
+            if (QFileSystemEngine::fillMetaData(fd, metaData)
+                    && metaData.isDirectory()) {
+                q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
+                QT_CLOSE(fd);
+                return false;
+            }
+        }
+
+        // Seek to the end when in Append mode.
+        if (flags & QFile::Append) {
+            int ret;
+            do {
+                ret = QT_LSEEK(fd, 0, SEEK_END);
+            } while (ret == -1 && errno == EINTR);
+
+            if (ret == -1) {
+                q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                            qt_error_string(int(errno)));
+                return false;
+            }
+        }
+
+        fh = 0;
+    } else {
+        QByteArray fopenMode = openModeToFopenMode(openMode, fileEntry, metaData);
+
+        // Try to open the file in buffered mode.
+        do {
+            fh = QT_FOPEN(fileEntry.nativeFilePath().constData(), fopenMode.constData());
+        } while (!fh && errno == EINTR);
+
+        // On failure, return and report the error.
+        if (!fh) {
+            q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                        qt_error_string(int(errno)));
+            return false;
+        }
+
+        if (!(openMode & QIODevice::WriteOnly)) {
+            // we don't need this check if we tried to open for writing because then
+            // we had received EISDIR anyway.
+            if (QFileSystemEngine::fillMetaData(QT_FILENO(fh), metaData)
+                    && metaData.isDirectory()) {
+                q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
+                fclose(fh);
+                return false;
+            }
+        }
+
+        setCloseOnExec(fileno(fh)); // ignore failure
+
+        // Seek to the end when in Append mode.
+        if (openMode & QIODevice::Append) {
+            int ret;
+            do {
+                ret = QT_FSEEK(fh, 0, SEEK_END);
+            } while (ret == -1 && errno == EINTR);
+
+            if (ret == -1) {
+                q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
+                            qt_error_string(int(errno)));
+                return false;
+            }
+        }
+
+        fd = -1;
+    }
+
+    closeFileHandle = true;
+    return true;
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::nativeClose()
+{
+    return closeFdFh();
+}
+
+/*!
+    \internal
+
+*/
+bool QFSFileEnginePrivate::nativeFlush()
+{
+    return fh ? flushFh() : fd != -1;
+}
+
+/*!
+    \internal
+    \since 5.1
+*/
+bool QFSFileEnginePrivate::nativeSyncToDisk()
+{
+    Q_Q(QFSFileEngine);
+#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
+    const int ret = fdatasync(nativeHandle());
+#else
+    const int ret = fsync(nativeHandle());
+#endif
+    if (ret != 0)
+        q->setError(QFile::WriteError, qt_error_string(errno));
+    return ret == 0;
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::nativeRead(char *data, qint64 len)
+{
+    Q_Q(QFSFileEngine);
+
+    if (fh && nativeIsSequential()) {
+        size_t readBytes = 0;
+        int oldFlags = fcntl(QT_FILENO(fh), F_GETFL);
+        for (int i = 0; i < 2; ++i) {
+            // Unix: Make the underlying file descriptor non-blocking
+            if ((oldFlags & O_NONBLOCK) == 0)
+                fcntl(QT_FILENO(fh), F_SETFL, oldFlags | O_NONBLOCK);
+
+            // Cross platform stdlib read
+            size_t read = 0;
+            do {
+                read = fread(data + readBytes, 1, size_t(len - readBytes), fh);
+            } while (read == 0 && !feof(fh) && errno == EINTR);
+            if (read > 0) {
+                readBytes += read;
+                break;
+            } else {
+                if (readBytes)
+                    break;
+                readBytes = read;
+            }
+
+            // Unix: Restore the blocking state of the underlying socket
+            if ((oldFlags & O_NONBLOCK) == 0) {
+                fcntl(QT_FILENO(fh), F_SETFL, oldFlags);
+                if (readBytes == 0) {
+                    int readByte = 0;
+                    do {
+                        readByte = fgetc(fh);
+                    } while (readByte == -1 && errno == EINTR);
+                    if (readByte != -1) {
+                        *data = uchar(readByte);
+                        readBytes += 1;
+                    } else {
+                        break;
+                    }
+                }
+            }
+        }
+        // Unix: Restore the blocking state of the underlying socket
+        if ((oldFlags & O_NONBLOCK) == 0) {
+            fcntl(QT_FILENO(fh), F_SETFL, oldFlags);
+        }
+        if (readBytes == 0 && !feof(fh)) {
+            // if we didn't read anything and we're not at EOF, it must be an error
+            q->setError(QFile::ReadError, qt_error_string(int(errno)));
+            return -1;
+        }
+        return readBytes;
+    }
+
+    return readFdFh(data, len);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::nativeReadLine(char *data, qint64 maxlen)
+{
+    return readLineFdFh(data, maxlen);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::nativeWrite(const char *data, qint64 len)
+{
+    return writeFdFh(data, len);
+}
+
+/*!
+    \internal
+*/
+qint64 QFSFileEnginePrivate::nativePos() const
+{
+    return posFdFh();
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::nativeSeek(qint64 pos)
+{
+    return seekFdFh(pos);
+}
+
+/*!
+    \internal
+*/
+int QFSFileEnginePrivate::nativeHandle() const
+{
+    return fh ? fileno(fh) : fd;
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::nativeIsSequential() const
+{
+    return isSequentialFdFh();
+}
+
+bool QFSFileEngine::remove()
+{
+    Q_D(QFSFileEngine);
+    QSystemError error;
+    bool ret = QFileSystemEngine::removeFile(d->fileEntry, error);
+    d->metaData.clear();
+    if (!ret) {
+        setError(QFile::RemoveError, error.toString());
+    }
+    return ret;
+}
+
+bool QFSFileEngine::copy(const QString &newName)
+{
+    Q_D(QFSFileEngine);
+    QSystemError error;
+    bool ret = QFileSystemEngine::copyFile(d->fileEntry, QFileSystemEntry(newName), error);
+    if (!ret) {
+        setError(QFile::CopyError, error.toString());
+    }
+    return ret;
+}
+
+bool QFSFileEngine::renameOverwrite(const QString &newName)
+{
+    // On Unix, rename() overwrites.
+    return rename(newName);
+}
+
+bool QFSFileEngine::rename(const QString &newName)
+{
+    Q_D(QFSFileEngine);
+    QSystemError error;
+    bool ret = QFileSystemEngine::renameFile(d->fileEntry, QFileSystemEntry(newName), error);
+
+    if (!ret) {
+        setError(QFile::RenameError, error.toString());
+    }
+
+    return ret;
+}
+
+bool QFSFileEngine::link(const QString &newName)
+{
+    Q_D(QFSFileEngine);
+    QSystemError error;
+    bool ret = QFileSystemEngine::createLink(d->fileEntry, QFileSystemEntry(newName), error);
+    if (!ret) {
+        setError(QFile::RenameError, error.toString());
+    }
+    return ret;
+}
+
+qint64 QFSFileEnginePrivate::nativeSize() const
+{
+    return sizeFdFh();
+}
+
+bool QFSFileEngine::mkdir(const QString &name, bool createParentDirectories) const
+{
+    return QFileSystemEngine::createDirectory(QFileSystemEntry(name), createParentDirectories);
+}
+
+bool QFSFileEngine::rmdir(const QString &name, bool recurseParentDirectories) const
+{
+    return QFileSystemEngine::removeDirectory(QFileSystemEntry(name), recurseParentDirectories);
+}
+
+bool QFSFileEngine::caseSensitive() const
+{
+    return true;
+}
+
+bool QFSFileEngine::setCurrentPath(const QString &path)
+{
+    return QFileSystemEngine::setCurrentPath(QFileSystemEntry(path));
+}
+
+QString QFSFileEngine::currentPath(const QString &)
+{
+    return QFileSystemEngine::currentPath().filePath();
+}
+
+QString QFSFileEngine::homePath()
+{
+    return QFileSystemEngine::homePath();
+}
+
+QString QFSFileEngine::rootPath()
+{
+    return QFileSystemEngine::rootPath();
+}
+
+QString QFSFileEngine::tempPath()
+{
+    return QFileSystemEngine::tempPath();
+}
+
+QFileInfoList QFSFileEngine::drives()
+{
+    QFileInfoList ret;
+    ret.append(QFileInfo(rootPath()));
+    return ret;
+}
+
+bool QFSFileEnginePrivate::doStat(QFileSystemMetaData::MetaDataFlags flags) const
+{
+    if (!tried_stat || !metaData.hasFlags(flags)) {
+        tried_stat = 1;
+
+        int localFd = fd;
+        if (fh && fileEntry.isEmpty())
+            localFd = QT_FILENO(fh);
+        if (localFd != -1)
+            QFileSystemEngine::fillMetaData(localFd, metaData);
+
+        if (metaData.missingFlags(flags) && !fileEntry.isEmpty())
+            QFileSystemEngine::fillMetaData(fileEntry, metaData, metaData.missingFlags(flags));
+    }
+
+    return metaData.exists();
+}
+
+bool QFSFileEnginePrivate::isSymlink() const
+{
+    if (!metaData.hasFlags(QFileSystemMetaData::LinkType))
+        QFileSystemEngine::fillMetaData(fileEntry, metaData, QFileSystemMetaData::LinkType);
+
+    return metaData.isLink();
+}
+
+/*!
+    \reimp
+*/
+QAbstractFileEngine::FileFlags QFSFileEngine::fileFlags(FileFlags type) const
+{
+    Q_D(const QFSFileEngine);
+
+    if (type & Refresh)
+        d->metaData.clear();
+
+    QAbstractFileEngine::FileFlags ret = 0;
+
+    if (type & FlagsMask)
+        ret |= LocalDiskFlag;
+
+    bool exists;
+    {
+        QFileSystemMetaData::MetaDataFlags queryFlags = 0;
+
+        queryFlags |= QFileSystemMetaData::MetaDataFlags(uint(type))
+                & QFileSystemMetaData::Permissions;
+
+        if (type & TypesMask)
+            queryFlags |= QFileSystemMetaData::AliasType
+                    | QFileSystemMetaData::LinkType
+                    | QFileSystemMetaData::FileType
+                    | QFileSystemMetaData::DirectoryType
+                    | QFileSystemMetaData::BundleType;
+
+        if (type & FlagsMask)
+            queryFlags |= QFileSystemMetaData::HiddenAttribute
+                    | QFileSystemMetaData::ExistsAttribute;
+
+        queryFlags |= QFileSystemMetaData::LinkType;
+
+        exists = d->doStat(queryFlags);
+    }
+
+    if (!exists && !d->metaData.isLink())
+        return ret;
+
+    if (exists && (type & PermsMask))
+        ret |= FileFlags(uint(d->metaData.permissions()));
+
+    if (type & TypesMask) {
+        if (d->metaData.isAlias()) {
+            ret |= LinkType;
+        } else {
+            if ((type & LinkType) && d->metaData.isLink())
+                ret |= LinkType;
+            if (exists) {
+                if (d->metaData.isFile()) {
+                    ret |= FileType;
+                } else if (d->metaData.isDirectory()) {
+                    ret |= DirectoryType;
+                    if ((type & BundleType) && d->metaData.isBundle())
+                        ret |= BundleType;
+                }
+            }
+        }
+    }
+
+    if (type & FlagsMask) {
+        if (exists)
+            ret |= ExistsFlag;
+        if (d->fileEntry.isRoot())
+            ret |= RootFlag;
+        else if (d->metaData.isHidden())
+            ret |= HiddenFlag;
+    }
+
+    return ret;
+}
+
+QString QFSFileEngine::fileName(FileName file) const
+{
+    Q_D(const QFSFileEngine);
+    if (file == BundleName) {
+        return QFileSystemEngine::bundleName(d->fileEntry);
+    } else if (file == BaseName) {
+        return d->fileEntry.fileName();
+    } else if (file == PathName) {
+        return d->fileEntry.path();
+    } else if (file == AbsoluteName || file == AbsolutePathName) {
+        QFileSystemEntry entry(QFileSystemEngine::absoluteName(d->fileEntry));
+        if (file == AbsolutePathName) {
+            return entry.path();
+        }
+        return entry.filePath();
+    } else if (file == CanonicalName || file == CanonicalPathName) {
+        QFileSystemEntry entry(QFileSystemEngine::canonicalName(d->fileEntry, d->metaData));
+        if (file == CanonicalPathName)
+            return entry.path();
+        return entry.filePath();
+    } else if (file == LinkName) {
+        if (d->isSymlink()) {
+            QFileSystemEntry entry = QFileSystemEngine::getLinkTarget(d->fileEntry, d->metaData);
+            return entry.filePath();
+        }
+        return QString();
+    }
+    return d->fileEntry.filePath();
+}
+
+bool QFSFileEngine::isRelativePath() const
+{
+    Q_D(const QFSFileEngine);
+    return d->fileEntry.filePath().length() ? d->fileEntry.filePath()[0] != QLatin1Char('/') : true;
+}
+
+uint QFSFileEngine::ownerId(FileOwner own) const
+{
+    Q_D(const QFSFileEngine);
+    static const uint nobodyID = (uint) -2;
+
+    if (d->doStat(QFileSystemMetaData::OwnerIds))
+        return d->metaData.ownerId(own);
+
+    return nobodyID;
+}
+
+QString QFSFileEngine::owner(FileOwner own) const
+{
+    if (own == OwnerUser)
+        return QFileSystemEngine::resolveUserName(ownerId(own));
+    return QFileSystemEngine::resolveGroupName(ownerId(own));
+}
+
+bool QFSFileEngine::setPermissions(uint perms)
+{
+    Q_D(QFSFileEngine);
+    QSystemError error;
+    if (!QFileSystemEngine::setPermissions(d->fileEntry, QFile::Permissions(perms), error, 0)) {
+        setError(QFile::PermissionsError, error.toString());
+        return false;
+    }
+    return true;
+}
+
+bool QFSFileEngine::setSize(qint64 size)
+{
+    Q_D(QFSFileEngine);
+    bool ret = false;
+    if (d->fd != -1)
+        ret = QT_FTRUNCATE(d->fd, size) == 0;
+    else if (d->fh)
+        ret = QT_FTRUNCATE(QT_FILENO(d->fh), size) == 0;
+    else
+        ret = QT_TRUNCATE(d->fileEntry.nativeFilePath().constData(), size) == 0;
+    if (!ret)
+        setError(QFile::ResizeError, qt_error_string(errno));
+    return ret;
+}
+
+QDateTime QFSFileEngine::fileTime(FileTime time) const
+{
+    Q_D(const QFSFileEngine);
+
+    if (d->doStat(QFileSystemMetaData::Times))
+        return d->metaData.fileTime(time);
+
+    return QDateTime();
+}
+
+uchar *QFSFileEnginePrivate::map(qint64 offset, qint64 size, QFile::MemoryMapFlags flags)
+{
+    Q_Q(QFSFileEngine);
+    Q_UNUSED(flags);
+    if (openMode == QIODevice::NotOpen) {
+        q->setError(QFile::PermissionsError, qt_error_string(int(EACCES)));
+        return 0;
+    }
+
+    if (offset < 0 || offset != qint64(QT_OFF_T(offset))
+            || size < 0 || quint64(size) > quint64(size_t(-1))) {
+        q->setError(QFile::UnspecifiedError, qt_error_string(int(EINVAL)));
+        return 0;
+    }
+
+    // If we know the mapping will extend beyond EOF, fail early to avoid
+    // undefined behavior. Otherwise, let mmap have its say.
+    if (doStat(QFileSystemMetaData::SizeAttribute)
+            && (QT_OFF_T(size) > metaData.size() - QT_OFF_T(offset)))
+        qWarning("QFSFileEngine::map: Mapping a file beyond its size is not portable");
+
+    int access = 0;
+    if (openMode & QIODevice::ReadOnly) access |= PROT_READ;
+    if (openMode & QIODevice::WriteOnly) access |= PROT_WRITE;
+
+#if defined(Q_OS_INTEGRITY)
+    int pageSize = sysconf(_SC_PAGESIZE);
+#else
+    int pageSize = getpagesize();
+#endif
+    int extra = offset % pageSize;
+
+    if (quint64(size + extra) > quint64((size_t)-1)) {
+        q->setError(QFile::UnspecifiedError, qt_error_string(int(EINVAL)));
+        return 0;
+    }
+
+    size_t realSize = (size_t)size + extra;
+    QT_OFF_T realOffset = QT_OFF_T(offset);
+    realOffset &= ~(QT_OFF_T(pageSize - 1));
+
+    void *mapAddress = QT_MMAP((void*)0, realSize,
+                   access, MAP_SHARED, nativeHandle(), realOffset);
+    if (MAP_FAILED != mapAddress) {
+        uchar *address = extra + static_cast<uchar*>(mapAddress);
+        maps[address] = QPair<int,size_t>(extra, realSize);
+        return address;
+    }
+
+    switch(errno) {
+    case EBADF:
+        q->setError(QFile::PermissionsError, qt_error_string(int(EACCES)));
+        break;
+    case ENFILE:
+    case ENOMEM:
+        q->setError(QFile::ResourceError, qt_error_string(int(errno)));
+        break;
+    case EINVAL:
+        // size are out of bounds
+    default:
+        q->setError(QFile::UnspecifiedError, qt_error_string(int(errno)));
+        break;
+    }
+    return 0;
+}
+
+bool QFSFileEnginePrivate::unmap(uchar *ptr)
+{
+#if !defined(Q_OS_INTEGRITY)
+    Q_Q(QFSFileEngine);
+    if (!maps.contains(ptr)) {
+        q->setError(QFile::PermissionsError, qt_error_string(EACCES));
+        return false;
+    }
+
+    uchar *start = ptr - maps[ptr].first;
+    size_t len = maps[ptr].second;
+    if (-1 == munmap(start, len)) {
+        q->setError(QFile::UnspecifiedError, qt_error_string(errno));
+        return false;
+    }
+    maps.remove(ptr);
+    return true;
+#else
+    return false;
+#endif
+}
+
+#endif // QT_NO_FSFILEENGINE
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qlockfile.cpp

@@ -210,7 +210,7 @@ bool QLockFile::tryLock(int timeout)
             if (!d->isLocked && d->isApparentlyStale()) {
                 // Stale lock from another thread/process
                 // Ensure two processes don't remove it at the same time
-                QLockFile rmlock(d->fileName + QLatin1String(".rmlock"));
+                QLockFile rmlock(d->fileName + QStringLiteral(".rmlock"));
                 if (rmlock.tryLock()) {
                     if (d->isApparentlyStale() && d->removeStaleLock())
                         continue;
@@ -220,7 +220,7 @@ bool QLockFile::tryLock(int timeout)
         }
         if (timeout == 0 || (timeout > 0 && timer.hasExpired(timeout)))
             return false;
-        QLockFileThread::msleep(sleepTime);
+        QThread::msleep(sleepTime);
         if (sleepTime < 5 * 1000)
             sleepTime *= 2;
     }

src/app/core/backport/qlockfile_unix.cpp

@@ -0,0 +1,193 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 David Faure <faure+bluesystems@kde.org>
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qlockfile_p.h"
+
+#include <QTemporaryFile>
+#include <QCoreApplication>
+#include <QFileInfo>
+#include <QDebug>
+#include <QDateTime>
+
+#include "qcore_unix_p.h" // qt_safe_open
+#include "qabstractfileengine_p.h"
+//#include "qtemporaryfile_p.h"
+
+#include <sys/file.h>  // flock
+#include <sys/types.h> // kill
+#include <signal.h>    // kill
+#include <unistd.h>    // gethostname
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+static QByteArray localHostName() // from QHostInfo::localHostName(), modified to return a QByteArray
+{
+    QByteArray hostName(512, Qt::Uninitialized);
+    if (gethostname(hostName.data(), hostName.size()) == -1)
+        return QByteArray();
+    hostName.truncate(strlen(hostName.data()));
+    return hostName;
+}
+
+// ### merge into qt_safe_write?
+static qint64 qt_write_loop(int fd, const char *data, qint64 len)
+{
+    qint64 pos = 0;
+    while (pos < len) {
+        const qint64 ret = qt_safe_write(fd, data + pos, len - pos);
+        if (ret == -1) // e.g. partition full
+            return pos;
+        pos += ret;
+    }
+    return pos;
+}
+
+int QLockFilePrivate::checkFcntlWorksAfterFlock()
+{
+#ifndef QT_NO_TEMPORARYFILE
+    QTemporaryFile file;
+    if (!file.open())
+        return 0;
+    const int fd = file.d_func()->engine()->handle();
+#if defined(LOCK_EX) && defined(LOCK_NB)
+    if (flock(fd, LOCK_EX | LOCK_NB) == -1) // other threads, and other processes on a local fs
+        return 0;
+#endif
+    struct flock flockData;
+    flockData.l_type = F_WRLCK;
+    flockData.l_whence = SEEK_SET;
+    flockData.l_start = 0;
+    flockData.l_len = 0; // 0 = entire file
+    flockData.l_pid = getpid();
+    if (fcntl(fd, F_SETLK, &flockData) == -1) // for networked filesystems
+        return 0;
+    return 1;
+#else
+    return 0;
+#endif
+}
+
+static QBasicAtomicInt fcntlOK = Q_BASIC_ATOMIC_INITIALIZER(-1);
+
+/*!
+  \internal
+  Checks that the OS isn't using POSIX locks to emulate flock().
+  Mac OS X is one of those.
+*/
+static bool fcntlWorksAfterFlock()
+{
+    int value = fcntlOK.load();
+    if (Q_UNLIKELY(value == -1)) {
+        value = QLockFilePrivate::checkFcntlWorksAfterFlock();
+        fcntlOK.store(value);
+    }
+    return value == 1;
+}
+
+static bool setNativeLocks(int fd)
+{
+#if defined(LOCK_EX) && defined(LOCK_NB)
+    if (flock(fd, LOCK_EX | LOCK_NB) == -1) // other threads, and other processes on a local fs
+        return false;
+#endif
+    struct flock flockData;
+    flockData.l_type = F_WRLCK;
+    flockData.l_whence = SEEK_SET;
+    flockData.l_start = 0;
+    flockData.l_len = 0; // 0 = entire file
+    flockData.l_pid = getpid();
+    if (fcntlWorksAfterFlock() && fcntl(fd, F_SETLK, &flockData) == -1) // for networked filesystems
+        return false;
+    return true;
+}
+
+QLockFile::LockError QLockFilePrivate::tryLock_sys()
+{
+    // Assemble data, to write in a single call to write
+    // (otherwise we'd have to check every write call)
+    // Use operator% from the fast builder to avoid multiple memory allocations.
+    QByteArray fileData = QByteArray::number(QCoreApplication::applicationPid()) % '\n'
+                          % qAppName().toUtf8() % '\n'
+                          % localHostName() % '\n';
+
+    const QByteArray lockFileName = QFile::encodeName(fileName);
+    const int fd = qt_safe_open(lockFileName.constData(), O_WRONLY | O_CREAT | O_EXCL, 0644);
+    if (fd < 0) {
+        switch (errno) {
+        case EEXIST:
+            return QLockFile::LockFailedError;
+        case EACCES:
+        case EROFS:
+            return QLockFile::PermissionError;
+        default:
+            return QLockFile::UnknownError;
+        }
+    }
+    // Ensure nobody else can delete the file while we have it
+    if (!setNativeLocks(fd))
+        qWarning() << "setNativeLocks failed:" << strerror(errno);
+
+    // We hold the lock, continue.
+    fileHandle = fd;
+
+    QLockFile::LockError error = QLockFile::NoError;
+    if (qt_write_loop(fd, fileData.constData(), fileData.size()) < fileData.size())
+        error = QLockFile::UnknownError; // partition full
+    return error;
+}
+
+bool QLockFilePrivate::removeStaleLock()
+{
+    const QByteArray lockFileName = QFile::encodeName(fileName);
+    const int fd = qt_safe_open(lockFileName.constData(), O_WRONLY, 0644);
+    if (fd < 0) // gone already?
+        return false;
+    bool success = setNativeLocks(fd) && (::unlink(lockFileName) == 0);
+    close(fd);
+    return success;
+}
+
+bool QLockFilePrivate::isApparentlyStale() const
+{
+    qint64 pid;
+    QString hostname, appname;
+    if (!getLockInfo(&pid, &hostname, &appname))
+        return false;
+    if (hostname == QString::fromLocal8Bit(localHostName())) {
+        if (::kill(pid, 0) == -1 && errno == ESRCH)
+            return true; // PID doesn't exist anymore
+    }
+    const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
+    return staleLockTime > 0 && age > staleLockTime;
+}
+
+void QLockFile::unlock()
+{
+    Q_D(QLockFile);
+    if (!d->isLocked)
+        return;
+    close(d->fileHandle);
+    d->fileHandle = -1;
+    QFile::remove(d->fileName);
+    d->lockError = QLockFile::NoError;
+    d->isLocked = false;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qlockfile_win.cpp

@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 David Faure <faure+bluesystems@kde.org>
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qlockfile_p.h"
+#include "qfilesystementry_p.h"
+#include <qt_windows.h>
+
+#include <QCoreApplication>
+#include <QFileInfo>
+#include <QDateTime>
+#include <QDebug>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+QLockFile::LockError QLockFilePrivate::tryLock_sys()
+{
+    SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
+    const QFileSystemEntry fileEntry(fileName);
+    // When writing, allow others to read.
+    // When reading, QFile will allow others to read and write, all good.
+    // Adding FILE_SHARE_DELETE would allow forceful deletion of stale files,
+    // but Windows doesn't allow recreating it while this handle is open anyway,
+    // so this would only create confusion (can't lock, but no lock file to read from).
+    const DWORD dwShareMode = FILE_SHARE_READ;
+    HANDLE fh = CreateFile((const wchar_t*)fileEntry.nativeFilePath().utf16(),
+                           GENERIC_WRITE,
+                           dwShareMode,
+                           &securityAtts,
+                           CREATE_NEW, // error if already exists
+                           FILE_ATTRIBUTE_NORMAL,
+                           NULL);
+    if (fh == INVALID_HANDLE_VALUE) {
+        const DWORD lastError = GetLastError();
+        switch (lastError) {
+        case ERROR_SHARING_VIOLATION:
+        case ERROR_ALREADY_EXISTS:
+        case ERROR_FILE_EXISTS:
+        case ERROR_ACCESS_DENIED: // readonly file, or file still in use by another process. Assume the latter, since we don't create it readonly.
+            return QLockFile::LockFailedError;
+        default:
+            qWarning() << "Got unexpected locking error" << lastError;
+            return QLockFile::UnknownError;
+        }
+    }
+
+    // We hold the lock, continue.
+    fileHandle = fh;
+    // Assemble data, to write in a single call to write
+    // (otherwise we'd have to check every write call)
+    QByteArray fileData;
+    fileData += QByteArray::number(QCoreApplication::applicationPid());
+    fileData += '\n';
+    fileData += qAppName().toUtf8();
+    fileData += '\n';
+    //fileData += localHostname(); // gethostname requires winsock init, see QHostInfo...
+    fileData += '\n';
+    DWORD bytesWritten = 0;
+    QLockFile::LockError error = QLockFile::NoError;
+    if (!WriteFile(fh, fileData.constData(), fileData.size(), &bytesWritten, NULL) || !FlushFileBuffers(fh))
+        error = QLockFile::UnknownError; // partition full
+    return error;
+}
+
+bool QLockFilePrivate::removeStaleLock()
+{
+    // QFile::remove fails on Windows if the other process is still using the file, so it's not stale.
+    return QFile::remove(fileName);
+}
+
+bool QLockFilePrivate::isApparentlyStale() const
+{
+    qint64 pid;
+    QString hostname, appname;
+    if (!getLockInfo(&pid, &hostname, &appname))
+        return false;
+
+    HANDLE procHandle = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
+    if (!procHandle)
+        return true;
+    // We got a handle but check if process is still alive
+    DWORD dwR = ::WaitForSingleObject(procHandle, 0);
+    ::CloseHandle(procHandle);
+    if (dwR == WAIT_TIMEOUT)
+        return true;
+    const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
+    return staleLockTime > 0 && age > staleLockTime;
+}
+
+void QLockFile::unlock()
+{
+    Q_D(QLockFile);
+     if (!d->isLocked)
+        return;
+     CloseHandle(d->fileHandle);
+     QFile::remove(d->fileName);
+     d->lockError = QLockFile::NoError;
+     d->isLocked = false;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qmutexpool.cpp

@@ -0,0 +1,133 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qatomic.h"
+#include "qmutexpool_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_THREAD
+
+Q_GLOBAL_STATIC_WITH_ARGS(QMutexPool, globalMutexPool, (QMutex::Recursive))
+
+/*!
+    \class QMutexPool
+    \inmodule QtCore
+    \brief The QMutexPool class provides a pool of QMutex objects.
+
+    \internal
+
+    \ingroup thread
+
+    QMutexPool is a convenience class that provides access to a fixed
+    number of QMutex objects.
+
+    Typical use of a QMutexPool is in situations where it is not
+    possible or feasible to use one QMutex for every protected object.
+    The mutex pool will return a mutex based on the address of the
+    object that needs protection.
+
+    For example, consider this simple class:
+
+    \snippet code/src_corelib_thread_qmutexpool.cpp 0
+
+    Adding a QMutex member to the Number class does not make sense,
+    because it is so small. However, in order to ensure that access to
+    each Number is protected, you need to use a mutex. In this case, a
+    QMutexPool would be ideal.
+
+    Code to calculate the square of a number would then look something
+    like this:
+
+    \snippet code/src_corelib_thread_qmutexpool.cpp 1
+
+    This function will safely calculate the square of a number, since
+    it uses a mutex from a QMutexPool. The mutex is locked and
+    unlocked automatically by the QMutexLocker class. See the
+    QMutexLocker documentation for more details.
+*/
+
+/*!
+    Constructs  a QMutexPool, reserving space for \a size QMutexes. All
+    mutexes in the pool are created with \a recursionMode. By default,
+    all mutexes are non-recursive.
+
+    The QMutexes are created when needed, and deleted when the
+    QMutexPool is destructed.
+*/
+QMutexPool::QMutexPool(QMutex::RecursionMode recursionMode, int size)
+    : mutexes(size), recursionMode(recursionMode)
+{
+    for (int index = 0; index < mutexes.count(); ++index) {
+        mutexes[index].store(0);
+    }
+}
+
+/*!
+    Destructs a QMutexPool. All QMutexes that were created by the pool
+    are deleted.
+*/
+QMutexPool::~QMutexPool()
+{
+    for (int index = 0; index < mutexes.count(); ++index)
+        delete mutexes[index].load();
+}
+
+/*!
+    Returns the global QMutexPool instance.
+*/
+QMutexPool *QMutexPool::instance()
+{
+    return globalMutexPool();
+}
+
+/*!
+    \fn QMutexPool::get(const void *address)
+    Returns a QMutex from the pool. QMutexPool uses the value \a address
+    to determine which mutex is returned from the pool.
+*/
+
+/*!
+    \internal
+  create the mutex for the given index
+ */
+QMutex *QMutexPool::createMutex(int index)
+{
+    // mutex not created, create one
+    QMutex *newMutex = new QMutex(recursionMode);
+    if (!mutexes[index].testAndSetRelease(0, newMutex))
+        delete newMutex;
+    return mutexes[index].load();
+}
+
+/*!
+    Returns a QMutex from the global mutex pool.
+*/
+QMutex *QMutexPool::globalInstanceGet(const void *address)
+{
+    QMutexPool * const globalInstance = globalMutexPool();
+    if (globalInstance == 0)
+        return 0;
+    return globalInstance->get(address);
+}
+
+#endif // QT_NO_THREAD
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qmutexpool_p.h

@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMUTEXPOOL_P_H
+#define QMUTEXPOOL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of QSettings. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qatomic.h"
+#include <QMutex>
+#include <QVarLengthArray>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifndef QT_NO_THREAD
+
+class QMutexPool
+{
+public:
+    explicit QMutexPool(QMutex::RecursionMode recursionMode = QMutex::NonRecursive, int size = 131);
+    ~QMutexPool();
+
+    inline QMutex *get(const void *address) {
+        int index = uint(quintptr(address)) % mutexes.count();
+        QMutex *m = mutexes[index].load();
+        if (m)
+            return m;
+        else
+            return createMutex(index);
+    }
+    static QMutexPool *instance();
+    static QMutex *globalInstanceGet(const void *address);
+
+private:
+    QMutex *createMutex(int index);
+    QVarLengthArray<QAtomicPointer<QMutex>, 131> mutexes;
+    QMutex::RecursionMode recursionMode;
+};
+
+#endif // QT_NO_THREAD
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QMUTEXPOOL_P_H

src/app/core/backport/qresource.h

@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QRESOURCE_H
+#define QRESOURCE_H
+
+#include <QString>
+#include <QLocale>
+#include <QStringList>
+#include <QList>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QResourcePrivate;
+
+class QResource
+{
+public:
+    QResource(const QString &file=QString(), const QLocale &locale=QLocale());
+    ~QResource();
+
+    void setFileName(const QString &file);
+    QString fileName() const;
+    QString absoluteFilePath() const;
+
+    void setLocale(const QLocale &locale);
+    QLocale locale() const;
+
+    bool isValid() const;
+
+    bool isCompressed() const;
+    qint64 size() const;
+    const uchar *data() const;
+
+    static void addSearchPath(const QString &path);
+    static QStringList searchPaths();
+
+    static bool registerResource(const QString &rccFilename, const QString &resourceRoot=QString());
+    static bool unregisterResource(const QString &rccFilename, const QString &resourceRoot=QString());
+
+    static bool registerResource(const uchar *rccData, const QString &resourceRoot=QString());
+    static bool unregisterResource(const uchar *rccData, const QString &resourceRoot=QString());
+
+protected:
+    friend class QResourceFileEngine;
+    friend class QResourceFileEngineIterator;
+    bool isDir() const;
+    inline bool isFile() const { return !isDir(); }
+    QStringList children() const;
+
+protected:
+    QScopedPointer<QResourcePrivate> d_ptr;
+
+private:
+    Q_DECLARE_PRIVATE(QResource)
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QRESOURCE_H

src/app/core/backport/qresource_p.h

@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QRESOURCE_P_H
+#define QRESOURCE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qabstractfileengine_p.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QResourceFileEnginePrivate;
+class QResourceFileEngine : public QAbstractFileEngine
+{
+private:
+    Q_DECLARE_PRIVATE(QResourceFileEngine)
+public:
+    explicit QResourceFileEngine(const QString &path);
+    ~QResourceFileEngine();
+
+    virtual void setFileName(const QString &file);
+
+    virtual bool open(QIODevice::OpenMode flags) ;
+    virtual bool close();
+    virtual bool flush();
+    virtual qint64 size() const;
+    virtual qint64 pos() const;
+    virtual bool atEnd() const;
+    virtual bool seek(qint64);
+    virtual qint64 read(char *data, qint64 maxlen);
+    virtual qint64 write(const char *data, qint64 len);
+
+    virtual bool remove();
+    virtual bool copy(const QString &newName);
+    virtual bool rename(const QString &newName);
+    virtual bool link(const QString &newName);
+
+    virtual bool isSequential() const;
+
+    virtual bool isRelativePath() const;
+
+    virtual bool mkdir(const QString &dirName, bool createParentDirectories) const;
+    virtual bool rmdir(const QString &dirName, bool recurseParentDirectories) const;
+
+    virtual bool setSize(qint64 size);
+
+    virtual QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const;
+
+    virtual bool caseSensitive() const;
+
+    virtual FileFlags fileFlags(FileFlags type) const;
+
+    virtual bool setPermissions(uint perms);
+
+    virtual QString fileName(QAbstractFileEngine::FileName file) const;
+
+    virtual uint ownerId(FileOwner) const;
+    virtual QString owner(FileOwner) const;
+
+    virtual QDateTime fileTime(FileTime time) const;
+
+    virtual Iterator *beginEntryList(QDir::Filters filters, const QStringList &filterNames);
+    virtual Iterator *endEntryList();
+
+    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
+    bool supportsExtension(Extension extension) const;
+};
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QRESOURCE_P_H

src/app/core/backport/qsystemerror.cpp

@@ -0,0 +1,154 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGlobal>
+#include "qsystemerror_p.h"
+#if !defined(Q_OS_WINCE)
+#  include <errno.h>
+#  if defined(Q_CC_MSVC)
+#    include <crtdbg.h>
+#  endif
+#else
+#  if (_WIN32_WCE >= 0x700)
+#    include <errno.h>
+#  endif
+#endif
+#ifdef Q_OS_WIN
+#  include <qt_windows.h>
+#endif
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#if !defined(Q_OS_WIN) && !defined(QT_NO_THREAD) && !defined(Q_OS_INTEGRITY) && !defined(Q_OS_QNX) && \
+    defined(_POSIX_THREAD_SAFE_FUNCTIONS) && _POSIX_VERSION >= 200112L
+namespace {
+    // There are two incompatible versions of strerror_r:
+    // a) the XSI/POSIX.1 version, which returns an int,
+    //    indicating success or not
+    // b) the GNU version, which returns a char*, which may or may not
+    //    be the beginning of the buffer we used
+    // The GNU libc manpage for strerror_r says you should use the XSI
+    // version in portable code. However, it's impossible to do that if
+    // _GNU_SOURCE is defined so we use C++ overloading to decide what to do
+    // depending on the return type
+    static inline QString fromstrerror_helper(int, const QByteArray &buf)
+    {
+        return QString::fromLocal8Bit(buf);
+    }
+    static inline QString fromstrerror_helper(const char *str, const QByteArray &)
+    {
+        return QString::fromLocal8Bit(str);
+    }
+}
+#endif
+
+#ifdef Q_OS_WIN
+static QString windowsErrorString(int errorCode)
+{
+    QString ret;
+#ifndef Q_OS_WINRT
+    wchar_t *string = 0;
+    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
+                  NULL,
+                  errorCode,
+                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                  (LPWSTR)&string,
+                  0,
+                  NULL);
+    ret = QString::fromWCharArray(string);
+    LocalFree((HLOCAL)string);
+#else
+    wchar_t errorString[1024];
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
+                  NULL,
+                  errorCode,
+                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                  (LPWSTR)&errorString,
+                  sizeof(errorString)/sizeof(wchar_t),
+                  NULL);
+    ret = QString::fromWCharArray(errorString);
+#endif  // Q_OS_WINRT
+
+    if (ret.isEmpty() && errorCode == ERROR_MOD_NOT_FOUND)
+        ret = QString::fromLatin1("The specified module could not be found.");
+    return ret;
+}
+#endif
+
+static QString standardLibraryErrorString(int errorCode)
+{
+    const char *s = 0;
+    QString ret;
+    switch (errorCode) {
+    case 0:
+        break;
+    case EACCES:
+        s = QT_TRANSLATE_NOOP("QIODevice", "Permission denied");
+        break;
+    case EMFILE:
+        s = QT_TRANSLATE_NOOP("QIODevice", "Too many open files");
+        break;
+    case ENOENT:
+        s = QT_TRANSLATE_NOOP("QIODevice", "No such file or directory");
+        break;
+    case ENOSPC:
+        s = QT_TRANSLATE_NOOP("QIODevice", "No space left on device");
+        break;
+    default: {
+    #ifdef Q_OS_WINCE
+        ret = windowsErrorString(errorCode);
+    #else
+        #if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && _POSIX_VERSION >= 200112L && !defined(Q_OS_INTEGRITY) && !defined(Q_OS_QNX)
+            QByteArray buf(1024, '\0');
+            ret = fromstrerror_helper(strerror_r(errorCode, buf.data(), buf.size()), buf);
+        #else
+            ret = QString::fromLocal8Bit(strerror(errorCode));
+        #endif
+    #endif
+    break; }
+    }
+    if (s) {
+        // ######## this breaks moc build currently
+        // ret = QCoreApplication::translate("QIODevice", s);
+        ret = QString::fromLatin1(s);
+    }
+    return ret.trimmed();
+}
+
+QString QSystemError::toString()
+{
+    switch(errorScope) {
+    case NativeError:
+#if defined (Q_OS_WIN)
+        return windowsErrorString(errorCode);
+#else
+        //unix: fall through as native and standard library are the same
+#endif
+    case StandardLibraryError:
+        return standardLibraryErrorString(errorCode);
+    default:
+        qWarning("invalid error scope");
+        //fall through
+    case NoError:
+        return QLatin1String("No error");
+    }
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)

src/app/core/backport/qsystemerror_p.h

@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSYSTEMERROR_P_H
+#define QSYSTEMERROR_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QString>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+class QSystemError
+{
+public:
+    enum ErrorScope
+    {
+        NoError,
+        StandardLibraryError,
+        NativeError
+    };
+
+    inline QSystemError(int error, ErrorScope scope);
+    inline QSystemError();
+
+    QString toString();
+    inline ErrorScope scope();
+    inline int error();
+
+    //data members
+    int errorCode;
+    ErrorScope errorScope;
+};
+
+QSystemError::QSystemError(int error, QSystemError::ErrorScope scope)
+: errorCode(error), errorScope(scope)
+{
+
+}
+
+QSystemError::QSystemError()
+: errorCode(0), errorScope(NoError)
+{
+
+}
+
+QSystemError::ErrorScope QSystemError::scope()
+{
+    return errorScope;
+}
+
+int QSystemError::error()
+{
+    return errorCode;
+}
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif // QSYSTEMERROR_P_H

src/app/core/backport/qsystemlibrary_p.h

@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** $QT_BEGIN_LICENSE:GPL$
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSYSTEMLIBRARY_P_H
+#define QSYSTEMLIBRARY_P_H
+
+#include <QtGlobal>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#ifdef Q_OS_WIN
+#  include <QString>
+#  include <qt_windows.h>
+
+class QSystemLibrary
+{
+public:
+    explicit QSystemLibrary(const QString &libraryName)
+    {
+        m_libraryName = libraryName;
+        m_handle = 0;
+        m_didLoad = false;
+    }
+
+    explicit QSystemLibrary(const wchar_t *libraryName)
+    {
+        m_libraryName = QString::fromWCharArray(libraryName);
+        m_handle = 0;
+        m_didLoad = false;
+    }
+
+    bool load(bool onlySystemDirectory = true)
+    {
+        m_handle = load((const wchar_t *)m_libraryName.utf16(), onlySystemDirectory);
+        m_didLoad = true;
+        return (m_handle != 0);
+    }
+
+    bool isLoaded()
+    {
+        return (m_handle != 0);
+    }
+
+    QFunctionPointer resolve(const char *symbol)
+    {
+        if (!m_didLoad)
+            load();
+        if (!m_handle)
+            return 0;
+#ifdef Q_OS_WINCE
+        return QFunctionPointer(GetProcAddress(m_handle, (const wchar_t*)QString::fromLatin1(symbol).utf16()));
+#else
+        return QFunctionPointer(GetProcAddress(m_handle, symbol));
+#endif
+    }
+
+    static QFunctionPointer resolve(const QString &libraryName, const char *symbol)
+    {
+        return QSystemLibrary(libraryName).resolve(symbol);
+    }
+
+    static Q_CORE_EXPORT HINSTANCE load(const wchar_t *lpFileName, bool onlySystemDirectory = true);
+private:
+    HINSTANCE m_handle;
+    QString m_libraryName;
+    bool m_didLoad;
+};
+
+#endif  //Q_OS_WIN
+
+#endif //QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
+
+#endif  //QSYSTEMLIBRARY_P_H

src/app/core/core.pri

@@ -5,15 +5,67 @@ HEADERS += \
     $$PWD/vapplication.h \
     $$PWD/undoevent.h \
     $$PWD/vsettings.h \
-    $$PWD/qcommandlineoption.h \
-    $$PWD/qcommandlineparser.h \
-    $$PWD/qlockfile.h \
-    $$PWD/qlockfile_p.h
+    $$PWD/backport/qcommandlineoption.h \
+    $$PWD/backport/qcommandlineparser.h \
+    $$PWD/backport/qlockfile.h \
+    $$PWD/backport/qlockfile_p.h \
+    $$PWD/backport/qfilesystementry_p.h \
+    $$PWD/backport/qfsfileengine_p.h \
+    $$PWD/backport/qabstractfileengine_p.h \
+    $$PWD/backport/qresource_p.h \
+    $$PWD/backport/qresource.h \
+    $$PWD/backport/qfilesystemmetadata_p.h \
+    $$PWD/backport/qfilesystemengine_p.h \
+    $$PWD/backport/qsystemerror_p.h \
+    $$PWD/backport/qfsfileengine_iterator_p.h \
+    $$PWD/backport/qfilesystemiterator_p.h \
+    $$PWD/backport/qfileinfo_p.h \
+    $$PWD/backport/qmutexpool_p.h \
+    $$PWD/backport/qsystemlibrary_p.h \
+
+unix:!macx {
+    HEADERS += \
+        $$PWD/backport/qcore_unix_p.h
+}
+
+unix:macx {
+    HEADERS += \
+        $$PWD/backport/qcore_mac_p.h
+}
 
 SOURCES += \
     $$PWD/vapplication.cpp \
     $$PWD/undoevent.cpp \
     $$PWD/vsettings.cpp \
-    $$PWD/qcommandlineoption.cpp \
-    $$PWD/qcommandlineparser.cpp \
-    $$PWD/qlockfile.cpp
+    $$PWD/backport/qcommandlineoption.cpp \
+    $$PWD/backport/qcommandlineparser.cpp \
+    $$PWD/backport/qlockfile.cpp \
+    $$PWD/backport/qfilesystementry.cpp \
+    $$PWD/backport/qfsfileengine.cpp \
+    $$PWD/backport/qabstractfileengine.cpp \
+    $$PWD/backport/qfilesystemengine.cpp \
+    $$PWD/backport/qsystemerror.cpp \
+    $$PWD/backport/qfsfileengine_iterator.cpp \
+    $$PWD/backport/qmutexpool.cpp
+
+unix:!macx {
+    SOURCES += \
+        $$PWD/backport/qlockfile_unix.cpp \
+        $$PWD/backport/qfilesystemiterator_unix.cpp \
+        $$PWD/backport/qfsfileengine_unix.cpp \
+        $$PWD/backport/qfilesystemengine_unix.cpp \
+        $$PWD/backport/qcore_unix.cpp
+}
+
+unix:macx {
+    SOURCES += \
+        $$PWD/backport/qcore_mac.cpp
+}
+
+win32 {
+    SOURCES += \
+        $$PWD/backport/qlockfile_win.cpp \
+        $$PWD/backport/qfilesystemiterator_win.cpp \
+        $$PWD/backport/qfsfileengine_win.cpp \
+        $$PWD/backport/qfilesystemengine_win.cpp
+}

src/app/core/vapplication.cpp

@@ -50,7 +50,7 @@
 #include <QThread>
 #include <QDateTime>
 #if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
-#   include "qlockfile.h"
+#   include "backport/qlockfile.h"
 #else
 #   include <QLockFile>
 #endif

src/app/main.cpp

@@ -36,7 +36,7 @@
 #include <QMessageBox>
 #include <QThread>
 #if QT_VERSION < QT_VERSION_CHECK(5, 2, 0)
-#   include "../core/qcommandlineparser.h"
+#   include "../core/backport/qcommandlineparser.h"
 #else
 #   include <QCommandLineParser>
 #endif

src/app/mainwindow.cpp

@@ -62,7 +62,7 @@
 #include <QDesktopWidget>
 #include <QDesktopServices>
 #if QT_VERSION < QT_VERSION_CHECK(5, 1, 0)
-#   include "core/qlockfile.h"
+#   include "core/backport/qlockfile.h"
 #else
 #   include <QLockFile>
 #endif