diff --git a/main_wayland.cpp b/main_wayland.cpp index 1a3d76ff6..1ad7dd167 100644 --- a/main_wayland.cpp +++ b/main_wayland.cpp @@ -1,677 +1,678 @@ /******************************************************************** KWin - the KDE window manager This file is part of the KDE project. Copyright (C) 2014 Martin Gräßlin 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, see . *********************************************************************/ #include "main_wayland.h" #include "composite.h" #include "virtualkeyboard.h" #include "workspace.h" #include // kwin #include "platform.h" #include "effects.h" #include "tabletmodemanager.h" #include "wayland_server.h" #include "xwl/xwayland.h" // KWayland #include #include // KDE #include #include #include #include #include // Qt #include #include #include #include #include #include #include // system #if HAVE_SYS_PRCTL_H #include #endif #if HAVE_SYS_PROCCTL_H #include #endif #if HAVE_LIBCAP #include #endif #include #include #include namespace KWin { static void sighandler(int) { QApplication::exit(); } void disableDrKonqi() { KCrash::setDrKonqiEnabled(false); } // run immediately, before Q_CORE_STARTUP functions // that would enable drkonqi Q_CONSTRUCTOR_FUNCTION(disableDrKonqi) enum class RealTimeFlags { DontReset, ResetOnFork }; namespace { void gainRealTime(RealTimeFlags flags = RealTimeFlags::DontReset) { #if HAVE_SCHED_RESET_ON_FORK const int minPriority = sched_get_priority_min(SCHED_RR); struct sched_param sp; sp.sched_priority = minPriority; int policy = SCHED_RR; if (flags == RealTimeFlags::ResetOnFork) { policy |= SCHED_RESET_ON_FORK; } sched_setscheduler(0, policy, &sp); #else Q_UNUSED(flags); #endif } } //************************************ // ApplicationWayland //************************************ ApplicationWayland::ApplicationWayland(int &argc, char **argv) : ApplicationWaylandAbstract(OperationModeWaylandOnly, argc, argv) { } ApplicationWayland::~ApplicationWayland() { setTerminating(); if (!waylandServer()) { return; } if (kwinApp()->platform()) { kwinApp()->platform()->setOutputsEnabled(false); } // need to unload all effects prior to destroying X connection as they might do X calls if (effects) { static_cast(effects)->unloadAllEffects(); } if (m_xwayland) { // needs to be done before workspace gets destroyed m_xwayland->prepareDestroy(); } destroyWorkspace(); waylandServer()->dispatch(); if (QStyle *s = style()) { s->unpolish(this); } // kill Xwayland before terminating its connection delete m_xwayland; m_xwayland = nullptr; waylandServer()->terminateClientConnections(); destroyCompositor(); } void ApplicationWayland::performStartup() { if (m_startXWayland) { setOperationMode(OperationModeXwayland); } // first load options - done internally by a different thread createOptions(); waylandServer()->createInternalConnection(); // try creating the Wayland Backend createInput(); // now libinput thread has been created, adjust scheduler to not leak into other processes gainRealTime(RealTimeFlags::ResetOnFork); VirtualKeyboard::create(this); createBackend(); TabletModeManager::create(this); } void ApplicationWayland::createBackend() { connect(platform(), &Platform::screensQueried, this, &ApplicationWayland::continueStartupWithScreens); connect(platform(), &Platform::initFailed, this, [] () { std::cerr << "FATAL ERROR: backend failed to initialize, exiting now" << std::endl; QCoreApplication::exit(1); } ); platform()->init(); } void ApplicationWayland::continueStartupWithScreens() { disconnect(kwinApp()->platform(), &Platform::screensQueried, this, &ApplicationWayland::continueStartupWithScreens); createScreens(); WaylandCompositor::create(); connect(Compositor::self(), &Compositor::sceneCreated, this, &ApplicationWayland::continueStartupWithScene); } void ApplicationWayland::finalizeStartup() { if (m_xwayland) { disconnect(m_xwayland, &Xwl::Xwayland::initialized, this, &ApplicationWayland::finalizeStartup); } startSession(); createWorkspace(); notifyKSplash(); } void ApplicationWayland::continueStartupWithScene() { disconnect(Compositor::self(), &Compositor::sceneCreated, this, &ApplicationWayland::continueStartupWithScene); if (operationMode() == OperationModeWaylandOnly) { finalizeStartup(); return; } m_xwayland = new Xwl::Xwayland(this); connect(m_xwayland, &Xwl::Xwayland::criticalError, this, [](int code) { // we currently exit on Xwayland errors always directly // TODO: restart Xwayland std::cerr << "Xwayland had a critical error. Going to exit now." << std::endl; exit(code); }); connect(m_xwayland, &Xwl::Xwayland::initialized, this, &ApplicationWayland::finalizeStartup); m_xwayland->init(); } void ApplicationWayland::startSession() { if (!m_inputMethodServerToStart.isEmpty()) { int socket = dup(waylandServer()->createInputMethodConnection()); if (socket >= 0) { QProcessEnvironment environment = processStartupEnvironment(); environment.insert(QStringLiteral("WAYLAND_SOCKET"), QByteArray::number(socket)); environment.insert(QStringLiteral("QT_QPA_PLATFORM"), QStringLiteral("wayland")); environment.remove("DISPLAY"); environment.remove("WAYLAND_DISPLAY"); QProcess *p = new Process(this); p->setProcessChannelMode(QProcess::ForwardedErrorChannel); auto finishedSignal = static_cast(&QProcess::finished); connect(p, finishedSignal, this, [this, p] { if (waylandServer()) { waylandServer()->destroyInputMethodConnection(); } p->deleteLater(); } ); p->setProcessEnvironment(environment); p->start(m_inputMethodServerToStart); p->waitForStarted(); } } // start session if (!m_sessionArgument.isEmpty()) { QProcess *p = new Process(this); p->setProcessChannelMode(QProcess::ForwardedErrorChannel); p->setProcessEnvironment(processStartupEnvironment()); auto finishedSignal = static_cast(&QProcess::finished); connect(p, finishedSignal, this, [](int code, QProcess::ExitStatus status) { if (status == QProcess::CrashExit) { qWarning() << "Session process has crashed"; QCoreApplication::exit(-1); return; } if (code) { qWarning() << "Session process exited with code" << code; } QCoreApplication::exit(code); }); p->start(m_sessionArgument); } // start the applications passed to us as command line arguments if (!m_applicationsToStart.isEmpty()) { for (const QString &application: m_applicationsToStart) { // note: this will kill the started process when we exit // this is going to happen anyway as we are the wayland and X server the app connects to QProcess *p = new Process(this); p->setProcessChannelMode(QProcess::ForwardedErrorChannel); p->setProcessEnvironment(processStartupEnvironment()); p->start(application); } } } static const QString s_waylandPlugin = QStringLiteral("KWinWaylandWaylandBackend"); static const QString s_x11Plugin = QStringLiteral("KWinWaylandX11Backend"); static const QString s_fbdevPlugin = QStringLiteral("KWinWaylandFbdevBackend"); #if HAVE_DRM static const QString s_drmPlugin = QStringLiteral("KWinWaylandDrmBackend"); #endif #if HAVE_LIBHYBRIS static const QString s_hwcomposerPlugin = QStringLiteral("KWinWaylandHwcomposerBackend"); #endif static const QString s_virtualPlugin = QStringLiteral("KWinWaylandVirtualBackend"); static QString automaticBackendSelection() { if (qEnvironmentVariableIsSet("WAYLAND_DISPLAY")) { return s_waylandPlugin; } if (qEnvironmentVariableIsSet("DISPLAY")) { return s_x11Plugin; } #if HAVE_LIBHYBRIS if (qEnvironmentVariableIsSet("ANDROID_ROOT")) { return s_hwcomposerPlugin; } #endif #if HAVE_DRM return s_drmPlugin; #endif return s_fbdevPlugin; } static void disablePtrace() { #if HAVE_PR_SET_DUMPABLE // check whether we are running under a debugger const QFileInfo parent(QStringLiteral("/proc/%1/exe").arg(getppid())); if (parent.isSymLink() && (parent.symLinkTarget().endsWith(QLatin1String("/gdb")) || - parent.symLinkTarget().endsWith(QLatin1String("/gdbserver")))) { + parent.symLinkTarget().endsWith(QLatin1String("/gdbserver")) || + parent.symLinkTarget().endsWith(QLatin1String("/lldb-server")))) { // debugger, don't adjust return; } // disable ptrace in kwin_wayland prctl(PR_SET_DUMPABLE, 0); #endif #if HAVE_PROC_TRACE_CTL // FreeBSD's rudimentary procfs does not support /proc//exe // We could use the P_TRACED flag of the process to find out // if the process is being debugged ond FreeBSD. int mode = PROC_TRACE_CTL_DISABLE; procctl(P_PID, getpid(), PROC_TRACE_CTL, &mode); #endif } static void unsetDumpable(int sig) { #if HAVE_PR_SET_DUMPABLE prctl(PR_SET_DUMPABLE, 1); #endif signal(sig, SIG_IGN); raise(sig); return; } void dropNiceCapability() { #if HAVE_LIBCAP cap_t caps = cap_get_proc(); if (!caps) { return; } cap_value_t capList[] = { CAP_SYS_NICE }; if (cap_set_flag(caps, CAP_PERMITTED, 1, capList, CAP_CLEAR) == -1) { cap_free(caps); return; } if (cap_set_flag(caps, CAP_EFFECTIVE, 1, capList, CAP_CLEAR) == -1) { cap_free(caps); return; } cap_set_proc(caps); cap_free(caps); #endif } } // namespace int main(int argc, char * argv[]) { if (getuid() == 0) { std::cerr << "kwin_wayland does not support running as root." << std::endl; return 1; } KWin::disablePtrace(); KWin::Application::setupMalloc(); KWin::Application::setupLocalizedString(); KWin::gainRealTime(); KWin::dropNiceCapability(); if (signal(SIGTERM, KWin::sighandler) == SIG_IGN) signal(SIGTERM, SIG_IGN); if (signal(SIGINT, KWin::sighandler) == SIG_IGN) signal(SIGINT, SIG_IGN); if (signal(SIGHUP, KWin::sighandler) == SIG_IGN) signal(SIGHUP, SIG_IGN); signal(SIGABRT, KWin::unsetDumpable); signal(SIGSEGV, KWin::unsetDumpable); signal(SIGPIPE, SIG_IGN); // ensure that no thread takes SIGUSR sigset_t userSignals; sigemptyset(&userSignals); sigaddset(&userSignals, SIGUSR1); sigaddset(&userSignals, SIGUSR2); pthread_sigmask(SIG_BLOCK, &userSignals, nullptr); QProcessEnvironment environment = QProcessEnvironment::systemEnvironment(); // enforce our internal qpa plugin, unfortunately command line switch has precedence setenv("QT_QPA_PLATFORM", "wayland-org.kde.kwin.qpa", true); qunsetenv("QT_DEVICE_PIXEL_RATIO"); qputenv("QT_IM_MODULE", "qtvirtualkeyboard"); qputenv("QSG_RENDER_LOOP", "basic"); QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); KWin::ApplicationWayland a(argc, argv); a.setupTranslator(); // reset QT_QPA_PLATFORM to a sane value for any processes started from KWin setenv("QT_QPA_PLATFORM", "wayland", true); KWin::Application::createAboutData(); KQuickAddons::QtQuickSettings::init(); const auto availablePlugins = KPluginLoader::findPlugins(QStringLiteral("org.kde.kwin.waylandbackends")); auto hasPlugin = [&availablePlugins] (const QString &name) { return std::any_of(availablePlugins.begin(), availablePlugins.end(), [name] (const KPluginMetaData &plugin) { return plugin.pluginId() == name; } ); }; const bool hasSizeOption = hasPlugin(KWin::s_x11Plugin) || hasPlugin(KWin::s_virtualPlugin); const bool hasOutputCountOption = hasPlugin(KWin::s_x11Plugin); const bool hasX11Option = hasPlugin(KWin::s_x11Plugin); const bool hasVirtualOption = hasPlugin(KWin::s_virtualPlugin); const bool hasWaylandOption = hasPlugin(KWin::s_waylandPlugin); const bool hasFramebufferOption = hasPlugin(KWin::s_fbdevPlugin); #if HAVE_DRM const bool hasDrmOption = hasPlugin(KWin::s_drmPlugin); #endif #if HAVE_LIBHYBRIS const bool hasHwcomposerOption = hasPlugin(KWin::s_hwcomposerPlugin); #endif QCommandLineOption xwaylandOption(QStringLiteral("xwayland"), i18n("Start a rootless Xwayland server.")); QCommandLineOption waylandSocketOption(QStringList{QStringLiteral("s"), QStringLiteral("socket")}, i18n("Name of the Wayland socket to listen on. If not set \"wayland-0\" is used."), QStringLiteral("socket")); QCommandLineOption framebufferOption(QStringLiteral("framebuffer"), i18n("Render to framebuffer.")); QCommandLineOption framebufferDeviceOption(QStringLiteral("fb-device"), i18n("The framebuffer device to render to."), QStringLiteral("fbdev")); QCommandLineOption x11DisplayOption(QStringLiteral("x11-display"), i18n("The X11 Display to use in windowed mode on platform X11."), QStringLiteral("display")); QCommandLineOption waylandDisplayOption(QStringLiteral("wayland-display"), i18n("The Wayland Display to use in windowed mode on platform Wayland."), QStringLiteral("display")); QCommandLineOption virtualFbOption(QStringLiteral("virtual"), i18n("Render to a virtual framebuffer.")); QCommandLineOption widthOption(QStringLiteral("width"), i18n("The width for windowed mode. Default width is 1024."), QStringLiteral("width")); widthOption.setDefaultValue(QString::number(1024)); QCommandLineOption heightOption(QStringLiteral("height"), i18n("The height for windowed mode. Default height is 768."), QStringLiteral("height")); heightOption.setDefaultValue(QString::number(768)); QCommandLineOption scaleOption(QStringLiteral("scale"), i18n("The scale for windowed mode. Default value is 1."), QStringLiteral("scale")); scaleOption.setDefaultValue(QString::number(1)); QCommandLineOption outputCountOption(QStringLiteral("output-count"), i18n("The number of windows to open as outputs in windowed mode. Default value is 1"), QStringLiteral("count")); outputCountOption.setDefaultValue(QString::number(1)); QCommandLineParser parser; a.setupCommandLine(&parser); parser.addOption(xwaylandOption); parser.addOption(waylandSocketOption); if (hasX11Option) { parser.addOption(x11DisplayOption); } if (hasWaylandOption) { parser.addOption(waylandDisplayOption); } if (hasFramebufferOption) { parser.addOption(framebufferOption); parser.addOption(framebufferDeviceOption); } if (hasVirtualOption) { parser.addOption(virtualFbOption); } if (hasSizeOption) { parser.addOption(widthOption); parser.addOption(heightOption); parser.addOption(scaleOption); } if (hasOutputCountOption) { parser.addOption(outputCountOption); } #if HAVE_LIBHYBRIS QCommandLineOption hwcomposerOption(QStringLiteral("hwcomposer"), i18n("Use libhybris hwcomposer")); if (hasHwcomposerOption) { parser.addOption(hwcomposerOption); } #endif QCommandLineOption libinputOption(QStringLiteral("libinput"), i18n("Enable libinput support for input events processing. Note: never use in a nested session.")); parser.addOption(libinputOption); #if HAVE_DRM QCommandLineOption drmOption(QStringLiteral("drm"), i18n("Render through drm node.")); if (hasDrmOption) { parser.addOption(drmOption); } #endif QCommandLineOption inputMethodOption(QStringLiteral("inputmethod"), i18n("Input method that KWin starts."), QStringLiteral("path/to/imserver")); parser.addOption(inputMethodOption); QCommandLineOption listBackendsOption(QStringLiteral("list-backends"), i18n("List all available backends and quit.")); parser.addOption(listBackendsOption); QCommandLineOption screenLockerOption(QStringLiteral("lockscreen"), i18n("Starts the session in locked mode.")); parser.addOption(screenLockerOption); QCommandLineOption noScreenLockerOption(QStringLiteral("no-lockscreen"), i18n("Starts the session without lock screen support.")); parser.addOption(noScreenLockerOption); QCommandLineOption noGlobalShortcutsOption(QStringLiteral("no-global-shortcuts"), i18n("Starts the session without global shortcuts support.")); parser.addOption(noGlobalShortcutsOption); QCommandLineOption exitWithSessionOption(QStringLiteral("exit-with-session"), i18n("Exit after the session application, which is started by KWin, closed."), QStringLiteral("/path/to/session")); parser.addOption(exitWithSessionOption); parser.addPositionalArgument(QStringLiteral("applications"), i18n("Applications to start once Wayland and Xwayland server are started"), QStringLiteral("[/path/to/application...]")); parser.process(a); a.processCommandLine(&parser); #ifdef KWIN_BUILD_ACTIVITIES a.setUseKActivities(false); #endif if (parser.isSet(listBackendsOption)) { for (const auto &plugin: availablePlugins) { std::cout << std::setw(40) << std::left << qPrintable(plugin.name()) << qPrintable(plugin.description()) << std::endl; } return 0; } if (parser.isSet(exitWithSessionOption)) { a.setSessionArgument(parser.value(exitWithSessionOption)); } KWin::Application::setUseLibinput(parser.isSet(libinputOption)); QString pluginName; QSize initialWindowSize; QByteArray deviceIdentifier; int outputCount = 1; qreal outputScale = 1; #if HAVE_DRM if (hasDrmOption && parser.isSet(drmOption)) { pluginName = KWin::s_drmPlugin; } #endif if (hasSizeOption) { bool ok = false; const int width = parser.value(widthOption).toInt(&ok); if (!ok) { std::cerr << "FATAL ERROR incorrect value for width" << std::endl; return 1; } const int height = parser.value(heightOption).toInt(&ok); if (!ok) { std::cerr << "FATAL ERROR incorrect value for height" << std::endl; return 1; } const qreal scale = parser.value(scaleOption).toDouble(&ok); if (!ok || scale < 1) { std::cerr << "FATAL ERROR incorrect value for scale" << std::endl; return 1; } outputScale = scale; initialWindowSize = QSize(width, height); } if (hasOutputCountOption) { bool ok = false; const int count = parser.value(outputCountOption).toInt(&ok); if (ok) { outputCount = qMax(1, count); } } if (hasX11Option && parser.isSet(x11DisplayOption)) { deviceIdentifier = parser.value(x11DisplayOption).toUtf8(); pluginName = KWin::s_x11Plugin; } else if (hasWaylandOption && parser.isSet(waylandDisplayOption)) { deviceIdentifier = parser.value(waylandDisplayOption).toUtf8(); pluginName = KWin::s_waylandPlugin; } if (hasFramebufferOption && parser.isSet(framebufferOption)) { pluginName = KWin::s_fbdevPlugin; deviceIdentifier = parser.value(framebufferDeviceOption).toUtf8(); } #if HAVE_LIBHYBRIS if (hasHwcomposerOption && parser.isSet(hwcomposerOption)) { pluginName = KWin::s_hwcomposerPlugin; } #endif if (hasVirtualOption && parser.isSet(virtualFbOption)) { pluginName = KWin::s_virtualPlugin; } if (pluginName.isEmpty()) { std::cerr << "No backend specified through command line argument, trying auto resolution" << std::endl; pluginName = KWin::automaticBackendSelection(); } auto pluginIt = std::find_if(availablePlugins.begin(), availablePlugins.end(), [&pluginName] (const KPluginMetaData &plugin) { return plugin.pluginId() == pluginName; } ); if (pluginIt == availablePlugins.end()) { std::cerr << "FATAL ERROR: could not find a backend" << std::endl; return 1; } // TODO: create backend without having the server running KWin::WaylandServer *server = KWin::WaylandServer::create(&a); KWin::WaylandServer::InitalizationFlags flags; if (parser.isSet(screenLockerOption)) { flags = KWin::WaylandServer::InitalizationFlag::LockScreen; } else if (parser.isSet(noScreenLockerOption)) { flags = KWin::WaylandServer::InitalizationFlag::NoLockScreenIntegration; } if (parser.isSet(noGlobalShortcutsOption)) { flags |= KWin::WaylandServer::InitalizationFlag::NoGlobalShortcuts; } if (!server->init(parser.value(waylandSocketOption).toUtf8(), flags)) { std::cerr << "FATAL ERROR: could not create Wayland server" << std::endl; return 1; } a.initPlatform(*pluginIt); if (!a.platform()) { std::cerr << "FATAL ERROR: could not instantiate a backend" << std::endl; return 1; } if (!deviceIdentifier.isEmpty()) { a.platform()->setDeviceIdentifier(deviceIdentifier); } if (initialWindowSize.isValid()) { a.platform()->setInitialWindowSize(initialWindowSize); } a.platform()->setInitialOutputScale(outputScale); a.platform()->setInitialOutputCount(outputCount); QObject::connect(&a, &KWin::Application::workspaceCreated, server, &KWin::WaylandServer::initWorkspace); environment.insert(QStringLiteral("WAYLAND_DISPLAY"), server->display()->socketName()); a.setProcessStartupEnvironment(environment); a.setStartXwayland(parser.isSet(xwaylandOption)); a.setApplicationsToStart(parser.positionalArguments()); a.setInputMethodServerToStart(parser.value(inputMethodOption)); a.start(); return a.exec(); }