qBittorrent/src/main.cpp

/*
 * Bittorrent Client using Qt4 and libtorrent.
 * 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.
 *
 * Contact : chris@qbittorrent.org
 */

#include <QLocale>
#include <QTranslator>
#include <QFile>
#include <QLibraryInfo>
#include <QDebug>

#ifndef DISABLE_GUI
#if defined(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
#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
#include "qtsinglecoreapplication.h"
#include <iostream>
#include <stdio.h>
#include "headlessloader.h"
#endif

#include "preferences.h"
#if defined(Q_OS_UNIX)
#include <signal.h>
#include <execinfo.h>
#include "stacktrace.h"
#endif

#ifdef STACKTRACE_WIN
#include <signal.h>
#include "stacktrace_win.h"
#include "stacktrace_win_dlg.h"
#endif

#include <stdlib.h>
#include "misc.h"
#include "preferences.h"

#if defined(Q_OS_WIN) && !defined(QBT_HAS_GETCURRENTPID)
#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)
{
    signal(SIGINT, 0);
    qDebug("Catching SIGINT, exiting cleanly");
    qApp->exit();
}

void sigtermHandler(int)
{
    signal(SIGTERM, 0);
    qDebug("Catching SIGTERM, exiting cleanly");
    qApp->exit();
}

void sigsegvHandler(int)
{
    signal(SIGABRT, 0);
    signal(SIGSEGV, 0);
#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
    std::cerr << "\n\n*************************************************************\n";
    std::cerr << "Catching SIGSEGV, please report a bug at http://bug.qbittorrent.org\nand provide the following backtrace:\n";
    std::cerr << "qBittorrent version: " << VERSION << std::endl;
    print_stacktrace();
#else
#ifdef STACKTRACE_WIN
    StraceDlg dlg;
    dlg.setStacktraceString(straceWin::getBacktrace());
    dlg.exec();
#endif
#endif
    raise(SIGSEGV);
}

void sigabrtHandler(int)
{
    signal(SIGABRT, 0);
    signal(SIGSEGV, 0);
#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
    std::cerr << "\n\n*************************************************************\n";
    std::cerr << "Catching SIGABRT, please report a bug at http://bug.qbittorrent.org\nand provide the following backtrace:\n";
    std::cerr << "qBittorrent version: " << VERSION << std::endl;
    print_stacktrace();
#else
#ifdef STACKTRACE_WIN
    StraceDlg dlg;
    dlg.setStacktraceString(straceWin::getBacktrace());
    dlg.exec();
#endif
#endif
    raise(SIGABRT);
}
#endif

// Main
int main(int argc, char *argv[])
{
#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

    // Create Application
    QString uid = misc::getUserIDString();
#ifdef DISABLE_GUI
    bool shouldDaemonize = false;
    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "-d") == 0 || strcmp(argv[i], "--daemon") == 0) {
            shouldDaemonize = true;
            argc--;
            for (int j = i; j < argc; j++) {
                argv[j] = argv[j + 1];
            }
            i--;
        }
    }
    QtSingleCoreApplication app("qBittorrent-"+uid, argc, argv);
#else
    SessionApplication app("qBittorrent-"+uid, argc, argv);
#endif

    // Check if qBittorrent is already running for this user
    if (app.isRunning()) {
        qDebug("qBittorrent is already running for this user.");
        // Read torrents given on command line
#ifdef Q_OS_WIN
        DWORD pid = (DWORD)app.getRunningPid();
        if (pid > 0) {
            BOOL b = AllowSetForegroundWindow(pid);
            qDebug("AllowSetForegroundWindow() returns %s", b ? "TRUE" : "FALSE");
        }
#endif
        QStringList torrentCmdLine = app.arguments();
        //Pass program parameters if any
        QString message;
        QFileInfo torrentPath;
        for (int a = 1; a < torrentCmdLine.size(); ++a) {
            if (torrentCmdLine[a].startsWith("--")) continue;

            torrentPath.setFile(torrentCmdLine[a]);
            if (torrentPath.exists())
                message += torrentPath.absoluteFilePath();
            else
                message += torrentCmdLine[a];

            if (a < argc-1)
                message += "|";
        }

        if (!message.isEmpty()) {
            qDebug("Passing program parameters to running instance...");
            qDebug("Message: %s", qPrintable(message));
            app.sendMessage(message);
        }
        else { // Raise main window
            app.sendMessage("qbt://show");
        }

        return EXIT_SUCCESS;
    }

    srand(time(0));
    Preferences* const pref = Preferences::instance();
#ifndef DISABLE_GUI
    bool no_splash = false;
#else
    if (shouldDaemonize && daemon(1, 0) != 0) {
        qCritical("Something went wrong while daemonizing, exiting...");
        return EXIT_FAILURE;
    }
#endif

    // Load translation
    QString locale = pref->getLocale();
    QTranslator qtTranslator;
    QTranslator translator;
    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)) {
        qDebug("%s locale recognized, using translation.", qPrintable(locale));
    }
    else {
        qDebug("%s locale unrecognized, using default (en).", qPrintable(locale));
    }
    app.installTranslator(&translator);

#ifndef DISABLE_GUI
    if (locale.startsWith("ar") || locale.startsWith("he")) {
        qDebug("Right to Left mode");
        app.setLayoutDirection(Qt::RightToLeft);
    }
    else {
        app.setLayoutDirection(Qt::LeftToRight);
    }
#endif

    app.setApplicationName(QString::fromUtf8("qBittorrent"));

    // 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) {
#ifndef DISABLE_GUI
            if (QString::fromLocal8Bit(argv[i]) == QString::fromUtf8("--no-splash")) {
                no_splash = true;
            }
            else {
#endif
                if (QString::fromLocal8Bit(argv[i]).startsWith("--webui-port=")) {
                    QStringList parts = QString::fromLocal8Bit(argv[i]).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);
                        }
                    }
                }
#ifndef DISABLE_GUI
            }
#endif
        }
    }

#ifndef DISABLE_GUI
    if (pref->isSlashScreenDisabled()) {
        no_splash = true;
    }

    QSplashScreen *splash = 0;
    if (!no_splash) {
        QPixmap splash_img(":/Icons/skin/splash.png");
        QPainter painter(&splash_img);
        QString version = VERSION;
        painter.setPen(QPen(Qt::white));
        painter.setFont(QFont("Arial", 22, QFont::Black));
        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
    app.setStyleSheet("QStatusBar::item { border-width: 0; }");
#endif

    if (!userAgreesWithLegalNotice()) {
        return EXIT_SUCCESS;
    }

#ifndef DISABLE_GUI
    app.setQuitOnLastWindowClosed(false);
#endif

#if defined(Q_OS_UNIX) || defined(STACKTRACE_WIN)
    signal(SIGABRT, sigabrtHandler);
    signal(SIGTERM, sigtermHandler);
    signal(SIGINT, sigintHandler);
    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&)),
                     &window, SLOT(processParams(const QString&)));
    app.setActivationWindow(&window);
#ifdef Q_OS_MAC
    static_cast<QMacApplication*>(&app)->setReadyToProcessEvents();
#endif // Q_OS_MAC
#else
    // Load Headless class
    HeadlessLoader loader(torrents);
    QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
                     &loader, SLOT(processParams(const QString&)));
#endif

    int ret = app.exec();
    qDebug("Application has exited");
    return ret;
}