Simplify main() logic.

Add Application class.
Put application initialization code to Application class.
Place some code into separate functions.

src/application.cpp

@@ -0,0 +1,101 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2014  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2006  Christophe Dumez
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include <QDebug>
+#include <QFileInfo>
+#include <QLocale>
+#include <QLibraryInfo>
+#include <QSysInfo>
+
+#include "application.h"
+#include "preferences.h"
+
+Application::Application(const QString &id, int &argc, char **argv)
+#ifndef DISABLE_GUI
+    : SessionApplication(id, argc, argv)
+#else
+    : QtSingleCoreApplication(id, argc, argv)
+#endif
+{
+#if defined(Q_OS_MACX) && !defined(DISABLE_GUI)
+    if (QSysInfo::MacintoshVersion > QSysInfo::MV_10_8) {
+        // fix Mac OS X 10.9 (mavericks) font issue
+        // https://bugreports.qt-project.org/browse/QTBUG-32789
+        QFont::insertSubstitution(".Lucida Grande UI", "Lucida Grande");
+    }
+#endif
+    setApplicationName("qBittorrent");
+    initializeTranslation();
+#ifndef DISABLE_GUI
+    setStyleSheet("QStatusBar::item { border-width: 0; }");
+    setQuitOnLastWindowClosed(false);
+#endif
+}
+
+void Application::initializeTranslation()
+{
+    Preferences* const pref = Preferences::instance();
+    // Load translation
+    QString locale = pref->getLocale();
+    if (locale.isEmpty()) {
+        locale = QLocale::system().name();
+        pref->setLocale(locale);
+    }
+
+    if (qtTranslator_.load(
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
+            QString::fromUtf8("qtbase_") + locale, QLibraryInfo::location(QLibraryInfo::TranslationsPath)) ||
+        qtTranslator_.load(
+#endif
+            QString::fromUtf8("qt_") + locale, QLibraryInfo::location(QLibraryInfo::TranslationsPath))) {
+            qDebug("Qt %s locale recognized, using translation.", qPrintable(locale));
+    }
+    else {
+        qDebug("Qt %s locale unrecognized, using default (en).", qPrintable(locale));
+    }
+    installTranslator(&qtTranslator_);
+
+    if (translator_.load(QString::fromUtf8(":/lang/qbittorrent_") + locale)) {
+        qDebug("%s locale recognized, using translation.", qPrintable(locale));
+    }
+    else {
+        qDebug("%s locale unrecognized, using default (en).", qPrintable(locale));
+    }
+    installTranslator(&translator_);
+
+#ifndef DISABLE_GUI
+    if (locale.startsWith("ar") || locale.startsWith("he")) {
+        qDebug("Right to Left mode");
+        setLayoutDirection(Qt::RightToLeft);
+    }
+    else {
+        setLayoutDirection(Qt::LeftToRight);
+    }
+#endif
+}

src/application.h

@@ -0,0 +1,59 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2014  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2006  Christophe Dumez
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#ifndef APPLICATION_H
+#define APPLICATION_H
+
+#include <QStringList>
+#include <QTranslator>
+
+#ifndef DISABLE_GUI
+#include "sessionapplication.h"
+#else
+#include "qtsinglecoreapplication.h"
+#endif
+
+class Application
+#ifndef DISABLE_GUI
+    : public SessionApplication
+#else
+    : public QtSingleCoreApplication
+#endif
+{
+public:
+    Application(const QString &id, int &argc, char **argv);
+
+private:
+    QTranslator qtTranslator_;
+    QTranslator translator_;
+
+    void initializeTranslation();
+};
+
+#endif // APPLICATION_H

src/main.cpp

@@ -1,5 +1,6 @@
 /*
- * Bittorrent Client using Qt4 and libtorrent.
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2014  Vladimir Golovnev <glassez@yandex.ru>
  * Copyright (C) 2006  Christophe Dumez
  *
  * This program is free software; you can redistribute it and/or
@@ -28,52 +29,46 @@
  * Contact : chris@qbittorrent.org
  */
 
-#include <QLocale>
-#include <QTranslator>
-#include <QFile>
-#include <QLibraryInfo>
 #include <QDebug>
 
 #ifndef DISABLE_GUI
-#if defined(QBT_STATIC_QT)
+#include <QFont>
+#include <QMessageBox>
+#include <QPainter>
+#include <QPen>
+#include <QPushButton>
+#include <QSplashScreen>
+#include <QStyle>
+#include <QStyleFactory>
+#ifdef QBT_STATIC_QT
 #include <QtPlugin>
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
 Q_IMPORT_PLUGIN(QICOPlugin)
 #else
 Q_IMPORT_PLUGIN(qico)
 #endif
-#endif
+#endif // QBT_STATIC_QT
-#include <QMessageBox>
-#include <QStyleFactory>
-#include <QStyle>
-#include <QSplashScreen>
-#include <QPainter>
-#include <QPen>
-#include <QFont>
-#include <QPushButton>
-#include <QTimer>
-#include "sessionapplication.h"
 #include "mainwindow.h"
 #include "ico.h"
-#else
+#else // DISABLE_GUI
-#include "qtsinglecoreapplication.h"
 #include <iostream>
 #include <stdio.h>
 #include "headlessloader.h"
-#endif
+#endif // DISABLE_GUI
 
-#include "preferences.h"
+#include "application.h"
-#if defined(Q_OS_UNIX)
+
+#ifdef Q_OS_UNIX
 #include <signal.h>
 #include <execinfo.h>
 #include "stacktrace.h"
-#endif
+#endif // Q_OS_UNIX
 
 #ifdef STACKTRACE_WIN
 #include <signal.h>
 #include "stacktrace_win.h"
 #include "stacktrace_win_dlg.h"
-#endif
+#endif //STACKTRACE_WIN
 
 #include <stdlib.h>
 #include "misc.h"
@@ -83,54 +78,6 @@ Q_IMPORT_PLUGIN(qico)
 #error You seem to have updated QtSingleApplication without porting our custom QtSingleApplication::getRunningPid() function. Please see previous version to understate how it works.
 #endif
 
-void displayUsage(char* prg_name)
-{
-    std::cout << qPrintable(QObject::tr("Usage:")) << std::endl;
-    std::cout << '\t' << prg_name << " --version: " << qPrintable(QObject::tr("displays program version")) << std::endl;
-#ifndef DISABLE_GUI
-    std::cout << '\t' << prg_name << " --no-splash: " << qPrintable(QObject::tr("disable splash screen")) << std::endl;
-#else
-    std::cout << '\t' << prg_name << " -d | --daemon: " << qPrintable(QObject::tr("run in daemon-mode (background)")) << std::endl;
-#endif
-    std::cout << '\t' << prg_name << " --help: " << qPrintable(QObject::tr("displays this help message")) << std::endl;
-    std::cout << '\t' << prg_name << " --webui-port=x: " << qPrintable(QObject::tr("changes the webui port (current: %1)").arg(QString::number(Preferences::instance()->getWebUiPort()))) << std::endl;
-    std::cout << '\t' << prg_name << " " << qPrintable(QObject::tr("[files or urls]: downloads the torrents passed by the user (optional)")) << std::endl;
-}
-
-bool userAgreesWithLegalNotice()
-{
-    Preferences* const pref = Preferences::instance();
-    if (pref->getAcceptedLegal()) // Already accepted once
-        return true;
-#ifdef DISABLE_GUI
-    std::cout << std::endl << "*** " << qPrintable(QObject::tr("Legal Notice")) << " ***" << std::endl;
-    std::cout << qPrintable(QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.\n\nNo further notices will be issued.")) << std::endl << std::endl;
-    std::cout << qPrintable(QObject::tr("Press %1 key to accept and continue...").arg("'y'")) << std::endl;
-    char ret = getchar(); // Read pressed key
-    if (ret == 'y' || ret == 'Y') {
-        // Save the answer
-        pref->setAcceptedLegal(true);
-        return true;
-    }
-    return false;
-#else
-    QMessageBox msgBox;
-    msgBox.setText(QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.\n\nNo further notices will be issued."));
-    msgBox.setWindowTitle(QObject::tr("Legal notice"));
-    msgBox.addButton(QObject::tr("Cancel"), QMessageBox::RejectRole);
-    QAbstractButton *agree_button = msgBox.addButton(QObject::tr("I Agree"), QMessageBox::AcceptRole);
-    msgBox.show(); // Need to be shown or to moveToCenter does not work
-    msgBox.move(misc::screenCenter(&msgBox));
-    msgBox.exec();
-    if (msgBox.clickedButton() == agree_button) {
-        // Save the answer
-        pref->setAcceptedLegal(true);
-        return true;
-    }
-    return false;
-#endif
-}
-
 #if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
 void sigintHandler(int)
 {
@@ -185,199 +132,211 @@ void sigabrtHandler(int)
 }
 #endif
 
-// Main
+#ifndef DISABLE_GUI
-int main(int argc, char *argv[])
+void showSplashScreen()
 {
-#if defined(Q_OS_MACX) && !defined(DISABLE_GUI)
+    QPixmap splash_img(":/Icons/skin/splash.png");
-    if (QSysInfo::MacintoshVersion > QSysInfo::MV_10_8) {
+    QPainter painter(&splash_img);
-        // fix Mac OS X 10.9 (mavericks) font issue
+    QString version = VERSION;
-        // https://bugreports.qt-project.org/browse/QTBUG-32789
+    painter.setPen(QPen(Qt::white));
-        QFont::insertSubstitution(".Lucida Grande UI", "Lucida Grande");
+    painter.setFont(QFont("Arial", 22, QFont::Black));
-    }
+    painter.drawText(224 - painter.fontMetrics().width(version), 270, version);
+    QSplashScreen *splash = new QSplashScreen(splash_img, Qt::WindowStaysOnTopHint);
+    QTimer::singleShot(1500, splash, SLOT(deleteLater()));
+    splash->show();
+    qApp->processEvents();
+}
 #endif
 
-    // Create Application
+void displayVersion()
-    QString uid = misc::getUserIDString();
+{
-#ifdef DISABLE_GUI
+    std::cout << qPrintable(qApp->applicationName()) << " " << VERSION << std::endl;
-    bool shouldDaemonize = false;
+}
-    for (int i = 1; i < argc; i++) {
+
-        if (strcmp(argv[i], "-d") == 0 || strcmp(argv[i], "--daemon") == 0) {
+void displayUsage(const char *prg_name)
-            shouldDaemonize = true;
+{
-            argc--;
+    std::cout << qPrintable(QObject::tr("Usage:")) << std::endl;
-            for (int j = i; j < argc; j++) {
+    std::cout << '\t' << prg_name << " --version: " << qPrintable(QObject::tr("displays program version")) << std::endl;
-                argv[j] = argv[j + 1];
+#ifndef DISABLE_GUI
-            }
+    std::cout << '\t' << prg_name << " --no-splash: " << qPrintable(QObject::tr("disable splash screen")) << std::endl;
-            i--;
-        }
-    }
-    QtSingleCoreApplication app("qBittorrent-"+uid, argc, argv);
 #else
-    SessionApplication app("qBittorrent-"+uid, argc, argv);
+    std::cout << '\t' << prg_name << " -d | --daemon: " << qPrintable(QObject::tr("run in daemon-mode (background)")) << std::endl;
 #endif
+    std::cout << '\t' << prg_name << " --help: " << qPrintable(QObject::tr("displays this help message")) << std::endl;
+    std::cout << '\t' << prg_name << " --webui-port=x: " << qPrintable(QObject::tr("changes the webui port (current: %1)").arg(QString::number(Preferences::instance()->getWebUiPort()))) << std::endl;
+    std::cout << '\t' << prg_name << " " << qPrintable(QObject::tr("[files or urls]: downloads the torrents passed by the user (optional)")) << std::endl;
+}
 
-    // Check if qBittorrent is already running for this user
+void parseCommandLine(
-    if (app.isRunning()) {
+        bool& showVersion, bool& showUsage,
-        qDebug("qBittorrent is already running for this user.");
+#ifndef DISABLE_GUI
-        // Read torrents given on command line
+        bool& noSplash,
-#ifdef Q_OS_WIN
+#else
-        DWORD pid = (DWORD)app.getRunningPid();
+        bool& shouldDaemonize,
-        if (pid > 0) {
-            BOOL b = AllowSetForegroundWindow(pid);
-            qDebug("AllowSetForegroundWindow() returns %s", b ? "TRUE" : "FALSE");
-        }
 #endif
-        QStringList torrentCmdLine = app.arguments();
+        QStringList& torrents
-        //Pass program parameters if any
+        )
-        QString message;
+{
-        QFileInfo torrentPath;
+    // Default values
-        for (int a = 1; a < torrentCmdLine.size(); ++a) {
+    showVersion = false;
-            if (torrentCmdLine[a].startsWith("--")) continue;
+    showUsage = false;
-
+#ifndef DISABLE_GUI
-            torrentPath.setFile(torrentCmdLine[a]);
+    noSplash = Preferences::instance()->isSlashScreenDisabled();
-            if (torrentPath.exists())
+#else
-                message += torrentPath.absoluteFilePath();
+    shouldDaemonize = false;
-            else
+#endif
-                message += torrentCmdLine[a];
+    torrents.clear();
 
-            if (a < argc-1)
+    QStringList appArguments = qApp->arguments();
-                message += "|";
-        }
 
-        if (!message.isEmpty()) {
+    for (int i = 1; i < appArguments.size(); ++i) {
-            qDebug("Passing program parameters to running instance...");
+        QString& arg = appArguments[i];
-            qDebug("Message: %s", qPrintable(message));
+
-            app.sendMessage(message);
+        if (arg == "--version") {
+            showVersion = true;
         }
-        else { // Raise main window
+        else if (arg == "--usage") {
-            app.sendMessage("qbt://show");
+            showUsage = true;
+        }
+        else if (arg.startsWith("--webui-port=")) {
+            QStringList parts = arg.split("=");
+            if (parts.size() == 2) {
+                bool ok = false;
+                int new_port = parts.last().toInt(&ok);
+                if (ok && (new_port > 0) && (new_port <= 65535))
+                    Preferences::instance()->setWebUiPort(new_port);
+            }
         }
-
-        return EXIT_SUCCESS;
-    }
-
-    srand(time(0));
-    Preferences* const pref = Preferences::instance();
 #ifndef DISABLE_GUI
-    bool no_splash = false;
+        else if (arg == "--no-splash") {
+            noSplash = true;
+        }
 #else
-    if (shouldDaemonize && daemon(1, 0) != 0) {
+        else if ((arg == "-d") || (arg == "--daemon")) {
-        qCritical("Something went wrong while daemonizing, exiting...");
+            shouldDaemonize = true;
-        return EXIT_FAILURE;
+        }
-    }
 #endif
+        else if (!arg.startsWith("--")) {
+            QFileInfo torrentPath;
+            torrentPath.setFile(arg);
 
-    // Load translation
+            if (torrentPath.exists())
-    QString locale = pref->getLocale();
+                torrents += torrentPath.absoluteFilePath();
-    QTranslator qtTranslator;
+            else
-    QTranslator translator;
+                torrents += arg;
-    if (locale.isEmpty()) {
+        }
-        locale = QLocale::system().name();
-        pref->setLocale(locale);
-    }
-
-    if (qtTranslator.load(
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
-            QString::fromUtf8("qtbase_") + locale, QLibraryInfo::location(QLibraryInfo::TranslationsPath)) ||
-        qtTranslator.load(
-#endif
-            QString::fromUtf8("qt_") + locale, QLibraryInfo::location(QLibraryInfo::TranslationsPath))) {
-            qDebug("Qt %s locale recognized, using translation.", qPrintable(locale));
-    }
-    else {
-        qDebug("Qt %s locale unrecognized, using default (en).", qPrintable(locale));
     }
-    app.installTranslator(&qtTranslator);
+}
 
-    if (translator.load(QString::fromUtf8(":/lang/qbittorrent_") + locale)) {
+bool userAgreesWithLegalNotice()
-        qDebug("%s locale recognized, using translation.", qPrintable(locale));
+{
-    }
+    Preferences* const pref = Preferences::instance();
-    else {
+    if (pref->getAcceptedLegal()) // Already accepted once
-        qDebug("%s locale unrecognized, using default (en).", qPrintable(locale));
+        return true;
-    }
-    app.installTranslator(&translator);
 
-#ifndef DISABLE_GUI
+#ifdef DISABLE_GUI
-    if (locale.startsWith("ar") || locale.startsWith("he")) {
+    std::cout << std::endl << "*** " << qPrintable(QObject::tr("Legal Notice")) << " ***" << std::endl;
-        qDebug("Right to Left mode");
+    std::cout << qPrintable(QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.\n\nNo further notices will be issued.")) << std::endl << std::endl;
-        app.setLayoutDirection(Qt::RightToLeft);
+    std::cout << qPrintable(QObject::tr("Press %1 key to accept and continue...").arg("'y'")) << std::endl;
+    char ret = getchar(); // Read pressed key
+    if (ret == 'y' || ret == 'Y') {
+        // Save the answer
+        pref->setAcceptedLegal(true);
+        return true;
     }
-    else {
+#else
-        app.setLayoutDirection(Qt::LeftToRight);
+    QMessageBox msgBox;
+    msgBox.setText(QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.\n\nNo further notices will be issued."));
+    msgBox.setWindowTitle(QObject::tr("Legal notice"));
+    msgBox.addButton(QObject::tr("Cancel"), QMessageBox::RejectRole);
+    QAbstractButton *agree_button = msgBox.addButton(QObject::tr("I Agree"), QMessageBox::AcceptRole);
+    msgBox.show(); // Need to be shown or to moveToCenter does not work
+    msgBox.move(misc::screenCenter(&msgBox));
+    msgBox.exec();
+    if (msgBox.clickedButton() == agree_button) {
+        // Save the answer
+        pref->setAcceptedLegal(true);
+        return true;
     }
 #endif
 
-    app.setApplicationName(QString::fromUtf8("qBittorrent"));
+    return false;
-
+}
-    // Check for executable parameters
-    if (argc > 1) {
-        if (QString::fromLocal8Bit(argv[1]) == QString::fromUtf8("--version")) {
-            std::cout << "qBittorrent " << VERSION << '\n';
-            return EXIT_SUCCESS;
-        }
-
-        if (QString::fromLocal8Bit(argv[1]) == QString::fromUtf8("--help")) {
-            displayUsage(argv[0]);
-            return EXIT_SUCCESS;
-        }
 
-        for (int i = 1; i < argc; ++i) {
+// Main
+int main(int argc, char *argv[])
+{
+    // We must save it here because QApplication constructor may change it
+    bool isOneArg = (argc == 2);
+    bool showVersion;
+    bool showUsage;
 #ifndef DISABLE_GUI
-            if (QString::fromLocal8Bit(argv[i]) == QString::fromUtf8("--no-splash")) {
+    bool noSplash;
-                no_splash = true;
+#else
-            }
+    bool shouldDaemonize;
-            else {
 #endif
-                if (QString::fromLocal8Bit(argv[i]).startsWith("--webui-port=")) {
+    QStringList torrents;
-                    QStringList parts = QString::fromLocal8Bit(argv[i]).split("=");
+
-                    if (parts.size() == 2) {
+    // Create Application
-                        bool ok = false;
+    Application app("qBittorrent-" + misc::getUserIDString(), argc, argv);
-                        int new_port = parts.last().toInt(&ok);
+
-                        if (ok && new_port > 0 && new_port <= 65535) {
-                            Preferences::instance()->setWebUiPort(new_port);
-                        }
-                    }
-                }
 #ifndef DISABLE_GUI
-            }
+    parseCommandLine(showVersion, showUsage, noSplash, torrents);
+#else
+    parseCommandLine(showVersion, showUsage, shouldDaemonize, torrents);
 #endif
-        }
-    }
 
-#ifndef DISABLE_GUI
+    if (showVersion)
-    if (pref->isSlashScreenDisabled()) {
+        displayVersion();
-        no_splash = true;
-    }
 
-    QSplashScreen *splash = 0;
+    if (showUsage)
-    if (!no_splash) {
+        displayUsage(argv[0]);
-        QPixmap splash_img(":/Icons/skin/splash.png");
+
-        QPainter painter(&splash_img);
+    // If only one parameter is present and it is "--version"
-        QString version = VERSION;
+    // or "--help", program exits after printing appropriate message.
-        painter.setPen(QPen(Qt::white));
+    if (isOneArg && (showVersion || showUsage))
-        painter.setFont(QFont("Arial", 22, QFont::Black));
+        return EXIT_SUCCESS;
-        painter.drawText(224 - painter.fontMetrics().width(version), 270, version);
-        splash = new QSplashScreen(splash_img, Qt::WindowStaysOnTopHint);
-        QTimer::singleShot(1500, splash, SLOT(deleteLater()));
-        splash->show();
-        app.processEvents();
-    }
-#endif
 
     // Set environment variable
     if (!qputenv("QBITTORRENT", QByteArray(VERSION))) {
         std::cerr << "Couldn't set environment variable...\n";
     }
 
-#ifndef DISABLE_GUI
+    if (!userAgreesWithLegalNotice())
-    app.setStyleSheet("QStatusBar::item { border-width: 0; }");
+        return EXIT_SUCCESS;
+
+    // Check if qBittorrent is already running for this user
+    if (app.isRunning()) {
+        qDebug("qBittorrent is already running for this user.");
+#ifdef Q_OS_WIN
+        DWORD pid = (DWORD)app.getRunningPid();
+        if (pid > 0) {
+            BOOL b = AllowSetForegroundWindow(pid);
+            qDebug("AllowSetForegroundWindow() returns %s", b ? "TRUE" : "FALSE");
+        }
 #endif
+        if (!torrents.isEmpty()) {
+            QString message = torrents.join("|");
+            qDebug("Passing program parameters to running instance...");
+            qDebug("Message: %s", qPrintable(message));
+            app.sendMessage(message);
+        }
+        else { // Raise main window
+            app.sendMessage("qbt://show");
+        }
 
-    if (!userAgreesWithLegalNotice()) {
         return EXIT_SUCCESS;
     }
 
-#ifndef DISABLE_GUI
+    srand(time(0));
-    app.setQuitOnLastWindowClosed(false);
+#ifdef DISABLE_GUI
+    if (shouldDaemonize && (daemon(1, 0) != 0)) {
+        qCritical("Something went wrong while daemonizing, exiting...");
+        return EXIT_FAILURE;
+    }
+#else
+    if (!noSplash)
+        showSplashScreen();
 #endif
 
 #if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
@@ -387,16 +346,6 @@ int main(int argc, char *argv[])
     signal(SIGSEGV, sigsegvHandler);
 #endif
 
-    // Read torrents given on command line
-    QStringList torrents;
-    QStringList appArguments = app.arguments();
-    for (int i = 1; i < appArguments.size(); ++i) {
-        if (!appArguments[i].startsWith("--")) {
-            qDebug() << "Command line argument:" << appArguments[i];
-            torrents << appArguments[i];
-        }
-    }
-
 #ifndef DISABLE_GUI
     MainWindow window(0, torrents);
     QObject::connect(&app, SIGNAL(messageReceived(const QString&)),

src/src.pro

@@ -4,7 +4,7 @@ CONFIG += qt thread
 
 # Windows specific configuration
 win32 {
-  include(../winconf.pri)  
+  include(../winconf.pri)
 }
 
 # Mac specific configuration
@@ -109,7 +109,8 @@ HEADERS += misc.h \
            scannedfoldersmodel.h \
            qinisettings.h \
            smtp.h \
-           dnsupdater.h
+           dnsupdater.h \
+           application.h
 
 SOURCES += main.cpp \
            downloadthread.cpp \
@@ -118,7 +119,8 @@ SOURCES += main.cpp \
            misc.cpp \
            fs_utils.cpp \
            smtp.cpp \
-           dnsupdater.cpp
+           dnsupdater.cpp \
+           application.cpp
 
 nox {
   HEADERS += headlessloader.h