Failure free restart of the launcher and a comment

why we do that

3 files changed, 28 insertions, 0 deletions

diff --git a/core/launcher/serverapp.cpp b/core/launcher/serverapp.cpp
index 522ef07..28316a4 100644
--- a/core/launcher/serverapp.cpp
+++ b/core/launcher/serverapp.cpp
@@ -1,813 +1,832 @@
 /**********************************************************************
 ** Copyright (C) 2000-2003 Trolltech AS.  All rights reserved.
 **
 ** This file is part of the Qtopia Environment.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
 **
 ** Contact info@trolltech.com if any conditions of this licensing are
 ** not clear to you.
 **
 **********************************************************************/
 
 #include "serverapp.h"
 
 #include <opie/odevice.h>
 
 #include <qtopia/password.h>
 #include <qtopia/config.h>
 #include <qtopia/power.h>
 
 #ifdef Q_WS_QWS
 #include <qtopia/qcopenvelope_qws.h>
 #endif
 #include <qtopia/global.h>
 #include <qtopia/custom.h>
 
 #ifdef Q_WS_QWS
 #include <qgfx_qws.h>
 #endif
 #ifdef Q_OS_WIN32
 #include <io.h>
 #include <process.h>
 #else
 #include <unistd.h>
 #endif
 #include <qmessagebox.h>
 #include <qtimer.h>
 #include <qpainter.h>
 #include <qfile.h>
 #include <qpixmapcache.h>
 
 #include <stdlib.h>
 #include "screensaver.h"
 
 static ServerApplication *serverApp = 0;
 static int loggedin=0;
 
 using namespace Opie;
 
 QCopKeyRegister::QCopKeyRegister()
     : m_keyCode( 0 ) {
 }
 
 QCopKeyRegister::QCopKeyRegister( int k, const QCString& c, const QCString& m )
     :m_keyCode( k ), m_channel( c ), m_message( m ) {
 }
 
 int QCopKeyRegister::keyCode()const {
     return m_keyCode;
 }
 
 QCString QCopKeyRegister::channel()const {
     return m_channel;
 }
 
 QCString QCopKeyRegister::message()const {
     return m_message;
 }
 
 bool QCopKeyRegister::send() {
     if (m_channel.isNull() )
         return false;
 
     QCopEnvelope( m_channel, m_message );
 
     return true;
 }
 
 //---------------------------------------------------------------------------
 
 /*
   Priority is number of alerts that are needed to pop up
   alert.
  */
 class DesktopPowerAlerter : public QMessageBox
 {
     Q_OBJECT
 public:
     DesktopPowerAlerter( QWidget *parent, const char *name = 0 )
 	: QMessageBox( tr("Battery Status"), tr("Low Battery"),
 		       QMessageBox::Critical,
 		       QMessageBox::Ok | QMessageBox::Default,
 		       QMessageBox::NoButton, QMessageBox::NoButton,
 		       parent, name, FALSE )
     {
 	currentPriority = INT_MAX;
 	alertCount = 0;
     }
 
     void alert( const QString &text, int priority );
     void hideEvent( QHideEvent * );
 private:
     int currentPriority;
     int alertCount;
 };
 
 void DesktopPowerAlerter::alert( const QString &text, int priority )
 {
     alertCount++;
     if ( alertCount < priority )
 	return;
     if ( priority > currentPriority )
 	return;
     currentPriority = priority;
     setText( text );
     show();
 }
 
 
 void DesktopPowerAlerter::hideEvent( QHideEvent *e )
 {
     QMessageBox::hideEvent( e );
     alertCount = 0;
     currentPriority = INT_MAX;
 }
 
 //---------------------------------------------------------------------------
 
 KeyFilter::KeyFilter(QObject* parent) : QObject(parent), held_tid(0), heldButton(0)
 {
     /* We don't do this cause it would interfere with ODevice */
 #if 0
     qwsServer->setKeyboardFilter(this);
 #endif
 }
 
 void KeyFilter::timerEvent(QTimerEvent* e)
 {
     if ( e->timerId() == held_tid ) {
 	killTimer(held_tid);
 	// button held
 	if ( heldButton ) {
 	    emit activate(heldButton, TRUE);
 	    heldButton = 0;
 	}
 	held_tid = 0;
     }
 }
 
 void KeyFilter::registerKey( const QCopKeyRegister& key ) {
     m_keys.insert( key.keyCode(), key );
 }
 
 void KeyFilter::unregisterKey( const QCopKeyRegister& key ) {
     m_keys.remove( key.keyCode() );
 }
 
 bool KeyFilter::keyRegistered( int key ) {
     /*
      * Check if we've a key registered
      */
     if ( !m_keys[key].send())
         return false;
     else
         return true;
 
 }
 
 bool KeyFilter::checkButtonAction(bool db, int keycode,  int press, int autoRepeat)
 {
     if ( !loggedin
 	    // Permitted keys
 	    && keycode != Key_F34 // power
 	    && keycode != Key_F30 // select
 	    && keycode != Key_Enter
 	    && keycode != Key_Return
 	    && keycode != Key_Space
 	    && keycode != Key_Left
 	    && keycode != Key_Right
 	    && keycode != Key_Up
 	    && keycode != Key_Down )
 	return TRUE;
 
         /* check if it was registered */
     if (!db ) {
         if (keycode != 0 &&press && !autoRepeat && keyRegistered(keycode) )
             return true;
     }else {
 
 
         // First check to see if DeviceButtonManager knows something about this button:
         const Opie::ODeviceButton* button = Opie::ODevice::inst()->buttonForKeycode(keycode);
         if (button && !autoRepeat) {
             if ( held_tid ) {
                 killTimer(held_tid);
                 held_tid = 0;
             }
             if ( button->heldAction().isNull() ) {
                 if ( press )
                     emit activate(button, FALSE);
             } else if ( press ) {
                 heldButton = button;
                 held_tid = startTimer( ODevice::inst ()->buttonHoldTime () );
             } else if ( heldButton ) {
                 heldButton = 0;
                 emit activate(button, FALSE);
             }
             QWSServer::screenSaverActivate(FALSE);
             return TRUE;
         }
         return false;
     }
     if ( keycode == HardKey_Suspend ) {
         if ( press ) emit power();
         return TRUE;
     }
     if ( keycode == HardKey_Backlight ) {
         if ( press ) emit backlight();
         return TRUE;
     }
     if ( keycode == Key_F32 ) {
 #ifndef QT_NO_COP
         if ( press ) QCopEnvelope e( "QPE/Desktop", "startSync()" );
 #endif
         return TRUE;
     }
     if ( keycode == Key_F31 ) {
         if ( press ) emit symbol();
         QWSServer::screenSaverActivate(FALSE);
         return TRUE;
     }
 
     if ( keycode == Key_NumLock )
         if ( press ) emit numLockStateToggle();
 
     if ( keycode == Key_CapsLock )
         if ( press ) emit capsLockStateToggle();
 
     if ( serverApp )
         serverApp->keyClick(keycode,press,autoRepeat);
 
     return FALSE;
 }
 
 enum MemState { MemUnknown, MemVeryLow, MemLow, MemNormal } memstate=MemUnknown;
 
 #if defined(QPE_HAVE_MEMALERTER)
 QPE_MEMALERTER_IMPL
 #endif
 
 
 
 //---------------------------------------------------------------------------
 
 bool ServerApplication::doRestart = FALSE;
 bool ServerApplication::allowRestart = TRUE;
 
 void ServerApplication::switchLCD( bool on ) {
     if ( !qApp )
         return;
 
     ServerApplication *dapp = ServerApplication::me() ;
 
     if ( !dapp-> m_screensaver )
         return;
 
     if ( on ) {
         dapp-> m_screensaver-> setDisplayState ( true );
         dapp-> m_screensaver-> setBacklight ( -3 );
     }else
         dapp-> m_screensaver-> setDisplayState ( false );
 
 
 }
 
 ServerApplication::ServerApplication( int& argc, char **argv, Type t )
     : QPEApplication( argc, argv, t )
 {
 
 
     // We know we'll have lots of cached pixmaps due to App/DocLnks
     QPixmapCache::setCacheLimit(512);
 
     m_ps = new PowerStatus;
     m_ps_last = new PowerStatus;
     pa = new DesktopPowerAlerter( 0 );
 
     m_apm_timer = new QTimer( this );
     connect(m_apm_timer, SIGNAL( timeout() ),
             this, SLOT( apmTimeout() ) );
 
     reloadPowerWarnSettings();
 
     QCopChannel *channel = new QCopChannel( "QPE/System", this );
     connect(channel, SIGNAL(received( const QCString&, const QByteArray& ) ),
             this, SLOT(systemMessage(const QCString&, const QByteArray& ) ) );
 
     channel = new QCopChannel("QPE/Launcher", this );
     connect(channel, SIGNAL(received( const QCString&, const QByteArray& ) ),
             this, SLOT(launcherMessage( const QCString&, const QByteArray& ) ) );
 
     m_screensaver = new OpieScreenSaver();
     m_screensaver->setInterval( -1 );
     QWSServer::setScreenSaver( m_screensaver );
 
     connect( qApp, SIGNAL( volumeChanged( bool ) ),
              this, SLOT( rereadVolumes() ) );
 
 
     /* ### PluginLoader libqtopia SafeMode */
 #if 0
     if ( PluginLoader::inSafeMode() )
 	QTimer::singleShot(500, this, SLOT(showSafeMode()) );
     QTimer::singleShot(20*1000, this, SLOT(clearSafeMode()) );
 #endif
 
     kf = new KeyFilter(this);
 
     connect( kf, SIGNAL(launch()), this, SIGNAL(launch()) );
     connect( kf, SIGNAL(power()), this, SIGNAL(power()) );
     connect( kf, SIGNAL(backlight()), this, SIGNAL(backlight()) );
     connect( kf, SIGNAL(symbol()), this, SIGNAL(symbol()));
     connect( kf, SIGNAL(numLockStateToggle()), this,SIGNAL(numLockStateToggle()));
     connect( kf, SIGNAL(capsLockStateToggle()), this,SIGNAL(capsLockStateToggle()));
     connect( kf, SIGNAL(activate(const Opie::ODeviceButton*,bool)),
 	    this,SIGNAL(activate(const Opie::ODeviceButton*,bool)));
 
     connect( kf, SIGNAL(power()), this, SLOT(togglePower()) );
     connect( kf, SIGNAL(backlight()), this, SLOT(toggleLight()) );
 
     connect( this, SIGNAL(power() ),
              SLOT(togglePower() ) );
 
     rereadVolumes();
 
     serverApp = this;
 
     apmTimeout();
     grabKeyboard();
 
     /* make sure the event filter is installed */
     const Opie::ODeviceButton* but = Opie::ODevice::inst()->buttonForKeycode( -1 );
 }
 
 
 ServerApplication::~ServerApplication()
 {
     ungrabKeyboard();
 
 
     delete pa;
     delete m_ps;
     delete m_ps_last;
 }
 
 void ServerApplication::apmTimeout() {
     serverApp-> checkMemory( ); // in case no events are generated
     *m_ps_last = *m_ps;
     *m_ps = PowerStatusManager::readStatus();
 
     if ( m_ps->acStatus() != m_ps_last-> acStatus() )
         m_screensaver-> powerStatusChanged( *m_ps );
 
     if ( m_ps->acStatus() == PowerStatus::Online )
         return;
 
     int bat = m_ps-> batteryPercentRemaining();
 
     if ( bat < m_ps_last-> batteryPercentRemaining() ) {
         if ( bat <= m_powerCritical )
             pa->alert( tr( "Battery level is critical!\nKeep power off until power restored!" ), 1 );
         else if ( bat <= m_powerVeryLow )
             pa->alert( tr( "Battery is running very low. "), 2 );
     }
     if ( m_ps-> backupBatteryStatus() == PowerStatus::VeryLow )
         pa->alert( tr("The Back-up battery is very low.\nPlease charge the back-up battery." ), 2);
 
 }
 
 void ServerApplication::systemMessage( const QCString& msg,
                                        const QByteArray& data ) {
     QDataStream stream ( data, IO_ReadOnly );
 
     if ( msg == "setScreenSaverInterval(int)" ) {
         int time;
         stream >> time;
         m_screensaver-> setInterval( time );
     }
     else if ( msg == "setScreenSaverIntervals(int,int,int)" ) {
         int t1, t2, t3;
         stream >> t1 >> t2 >> t3;
         m_screensaver-> setIntervals( t1, t2, t3 );
     }
     else if ( msg == "setBacklight(int)" ) {
         int bright;
         stream >> bright;
         m_screensaver-> setBacklight( bright );
     }
     else if ( msg == "setScreenSaverMode(int)" ) {
         int mode;
         stream >> mode;
         m_screensaver-> setMode ( mode );
     }
     else if ( msg == "reloadPowerWarnSettings()" ) {
         reloadPowerWarnSettings();
     }
     else if ( msg == "setDisplayState(int)" ) {
         int state;
         stream >> state;
         m_screensaver-> setDisplayState ( state != 0 );
     }
     else if ( msg == "suspend()" ) {
         emit power();
     }
     else if ( msg == "sendBusinessCard()" ) {
         QString card = ::getenv ( "HOME" );
         card += "/Applications/addressbook/businesscard.vcf";
 
         if ( QFile::exists( card ) ) {
             QCopEnvelope e ( "QPE/Obex", "send(QString,QString,QString)" );
             QString mimetype = "text/x-vCard";
             e << tr( "business card" ) << card << mimetype;
         }
     }
 }
 
 void ServerApplication::reloadPowerWarnSettings ( )
 {
     Config cfg ( "apm" );
     cfg. setGroup ( "Warnings" );
 
     int iv = cfg. readNumEntry ( "checkinterval", 10000 );
 
     m_apm_timer-> stop ( );
     if ( iv )
         m_apm_timer-> start ( iv );
 
     m_powerVeryLow  = cfg. readNumEntry ( "powerverylow", 10 );
     m_powerCritical = cfg. readNumEntry ( "powervcritical", 5 );
 }
 
 void ServerApplication::launcherMessage( const QCString & msg, const QByteArray & data )
 {
     QDataStream stream ( data, IO_ReadOnly );
 
     if ( msg == "deviceButton(int,int,int)" ) {
         int keycode, press, autoRepeat;
         stream >> keycode >> press >> autoRepeat;
 
         kf->checkButtonAction ( true, keycode, press, autoRepeat );
     }
     else if ( msg == "keyRegister(int,QCString,QCString)" ) {
         int k;
         QCString c, m;
         stream >> k >> c >> m;
 
         kf -> registerKey( QCopKeyRegister(k, c, m) );
     }
 }
 
 
 bool ServerApplication::screenLocked()
 {
     return loggedin == 0;
 }
 
 void ServerApplication::login(bool at_poweron)
 {
     if ( !loggedin ) {
 	Global::terminateBuiltin("calibrate"); // No tr
 	Password::authenticate(at_poweron);
 	loggedin=1;
 #ifndef QT_NO_COP
 	QCopEnvelope e( "QPE/Desktop", "unlocked()" );
 #endif
     }
 }
 
 #if defined(QPE_HAVE_TOGGLELIGHT)
 #include <qtopia/config.h>
 
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
 #include <linux/ioctl.h>
 #include <time.h>
 #endif
 
 #if 0
 static bool blanked=FALSE;
 
 static void blankScreen()
 {
 #ifdef QWS
     QWidget w(0, 0, Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_Tool | Qt::WStyle_StaysOnTop | Qt::WPaintUnclipped);
     w.resize( qt_screen->width(), qt_screen->height() );
     w.move(0, 0);
 
     QPainter p(&w);
     p.fillRect(w.rect(), QBrush(QColor(255,255,255)) );
     p.end();
     w.repaint();
 
     blanked = TRUE;
 #endif
 }
 
 static void darkScreen()
 {
     /* ### Screen blanking ODevice */
 #if 0
     qpe_setBacklight(0); // force off
 #endif
 }
 #endif
 
 namespace {
     void execAutoStart(const QDateTime& suspendTime ) {
         QString appName;
 	int delay;
 	QDateTime now = QDateTime::currentDateTime();
 
         Config cfg( "autostart" );
 	cfg.setGroup( "AutoStart" );
 	appName = cfg.readEntry( "Apps", "" );
 	delay = cfg.readNumEntry( "Delay", 0  );
 
 	// If the time between suspend and resume was longer then the
 	// value saved as delay, start the app
 	if ( suspendTime.secsTo( now ) >= ( delay * 60 ) && !appName.isEmpty() ) {
 		QCopEnvelope e( "QPE/System", "execute(QString)" );
 		e << QString( appName );
 	}
     }
 }
 
 
 void ServerApplication::togglePower()
 {
 	static bool excllock = false;
 
 	if ( excllock )
 		return ;
 
 	excllock = true;
 
 	bool wasloggedin = loggedin;
 	loggedin = 0;
 	m_suspendTime = QDateTime::currentDateTime();
 
 #ifdef QWS
 
 	if ( Password::needToAuthenticate ( true ) && qt_screen ) {
 		// Should use a big black window instead.
 		// But this would not show up fast enough
 		QGfx *g = qt_screen-> screenGfx ( );
 		g-> fillRect ( 0, 0, qt_screen-> width ( ), qt_screen-> height ( ));
 		delete g;
 	}
 #endif
 
 	ODevice::inst ( )-> suspend ( );
 
 	ServerApplication::switchLCD ( true ); // force LCD on without slow qcop call
 	QWSServer::screenSaverActivate ( false );
 
 	{
 		QCopEnvelope( "QPE/Card", "mtabChanged()" ); // might have changed while asleep
 	}
 
 	if ( wasloggedin )
 		login ( true );
 
 	execAutoStart(m_suspendTime);
 	//qcopBridge->closeOpenConnections();
 
 	excllock = false;
 }
 
 void ServerApplication::toggleLight()
 {
 #ifndef QT_NO_COP
     QCopEnvelope e("QPE/System", "setBacklight(int)");
     e << -2; // toggle
 #endif
 }
 
 
 /*
  * We still listen to key events but handle them in
  * a special class
  */
 
 bool ServerApplication::eventFilter( QObject *o, QEvent *e) {
     if ( e->type() != QEvent::KeyPress &&
          e->type() != QEvent::KeyRelease )
         return QPEApplication::eventFilter( o, e );
 
     QKeyEvent *ke = static_cast<QKeyEvent*>( e );
     if ( kf->checkButtonAction( true, ke->key(),
                                 e->type() == QEvent::KeyPress,
                                 ke-> isAutoRepeat() ))
         return true;
 
     return QPEApplication::eventFilter( o, e );
 
 }
 
 #ifdef Q_WS_QWS
 bool ServerApplication::qwsEventFilter( QWSEvent *e )
 {
     checkMemory();
 
     if ( e->type == QWSEvent::Mouse ) {
 	QWSMouseEvent *me = (QWSMouseEvent *)e;
 	static bool up = TRUE;
 	if ( me->simpleData.state&LeftButton ) {
 	    if ( up ) {
 		up = FALSE;
 		screenClick(TRUE);
 	    }
 	} else if ( !up ) {
 	    up = TRUE;
 	    screenClick(FALSE);
 	}
     }else if ( e->type == QWSEvent::Key ) {
         QWSKeyEvent * ke = static_cast<QWSKeyEvent*>( e );
         if ( kf->checkButtonAction( false,
                                     ke-> simpleData.keycode,
                                     ke-> simpleData.is_press,
                                     ke-> simpleData.is_auto_repeat ) )
             return true;
     }
 
     return QPEApplication::qwsEventFilter( e );
 }
 #endif
 
 
 /* ### FIXME libqtopia Plugin Safe Mode */
 
 void ServerApplication::showSafeMode()
 {
 #if 0
     if ( QMessageBox::warning(0, tr("Safe Mode"), tr("<P>A system startup error occurred, "
 		"and the system is now in Safe Mode. "
 		"Plugins are not loaded in Safe Mode. "
 		"You can use the Plugin Manager to "
 		"disable plugins that cause system error."), tr("OK"), tr("Plugin Manager..."), 0) == 1 ) {
 	Global::execute( "pluginmanager" );
     }
 #endif
 }
 
 void ServerApplication::clearSafeMode()
 {
 #if 0
     // If we've been running OK for a while then we won't bother going into
     // safe mode immediately on the next crash.
     Config cfg( "PluginLoader" );
     cfg.setGroup( "Global" );
     QString mode = cfg.readEntry( "Mode", "Normal" );
     if ( mode == "MaybeSafe" ) {
 	cfg.writeEntry( "Mode", "Normal" );
     }
 #endif
 }
 
 
 void ServerApplication::shutdown()
 {
     if ( type() != GuiServer )
 	return;
     ShutdownImpl *sd = new ShutdownImpl( 0, 0, WDestructiveClose );
     connect( sd, SIGNAL(shutdown(ShutdownImpl::Type)),
 	     this, SLOT(shutdown(ShutdownImpl::Type)) );
     sd->showMaximized();
 }
 
 void ServerApplication::shutdown( ShutdownImpl::Type t )
 {
     char *opt = 0;
 
     switch ( t ) {
     case ShutdownImpl::ShutdownSystem:
         opt = "-h";
         // fall through
     case ShutdownImpl::RebootSystem:
         if ( opt == 0 )
             opt = "-r";
 
         if ( execl( "/sbin/shutdown", "shutdown", opt, "now", ( void* ) 0) < 0 )
             perror("shutdown");
 //		        		::syslog ( LOG_ERR, "Erroring execing shutdown\n" );
 
         break;
     case ShutdownImpl::RestartDesktop:
         restart();
         break;
     case ShutdownImpl::TerminateDesktop:
         prepareForTermination( FALSE );
 
         // This is a workaround for a Qt bug
         // clipboard applet has to stop its poll timer, or Qt/E
         // will hang on quit() right before it emits aboutToQuit()
         emit aboutToQuit ( );
 
         quit();
         break;
     }
 }
 
 void ServerApplication::restart()
 {
     if ( allowRestart ) {
+
+        /*
+         * Applets and restart is a problem. Some applets delete
+         * their widgets even if ownership gets transfered to the
+         * parent (Systray ) but deleting the applet may be unsafe
+         * as well ( double deletion ). Some have topLevel widgets
+         * and when we dlclose and then delete the widget we will
+         * crash and an crash during restart is not nice
+         */
+#ifdef ALL_APPLETS_ON_THIS_WORLD_ARE_FIXED
+        /* same as above */
+        emit aboutToQuit();
 	prepareForTermination(TRUE);
 	doRestart = TRUE;
 	quit();
+#else
+        prepareForTermination( true );
+        for ( int fd = 3; fd < 100; fd++ )
+		close( fd );
+        execl( ( qpeDir() + "/bin/qpe" ).latin1(), "qpe", 0 );
+        exit( 1 );
+#endif
     }
 }
 
 void ServerApplication::rereadVolumes()
 {
     Config cfg( "qpe" );
     cfg. setGroup ( "Volume" );
 
     m_screentap_sound = cfg. readBoolEntry ( "TouchSound" );
     m_keyclick_sound  = cfg. readBoolEntry ( "KeySound" );
     m_alarm_sound     = cfg. readBoolEntry ( "AlarmSound" );
 }
 
 
 void ServerApplication::checkMemory()
 {
 #if defined(QPE_HAVE_MEMALERTER)
     static bool ignoreNormal=TRUE;
     static bool existingMessage=FALSE;
 
     if(existingMessage)
 	return; // don't show a second message while still on first
 
     existingMessage = TRUE;
     switch ( memstate ) {
 	case MemUnknown:
 	    break;
 	case MemLow:
 	    memstate = MemUnknown;
 	    if ( !recoverMemory() ) {
 		QMessageBox::warning( 0 , tr("Memory Status"),
 		    tr("Memory Low\nPlease save data.") );
 		ignoreNormal = FALSE;
 	    }
 	    break;
 	case MemNormal:
 	    memstate = MemUnknown;
 	    if ( !ignoreNormal ) {
 		ignoreNormal = TRUE;
 		QMessageBox::information ( 0 , tr("Memory Status"),
 		    "Memory OK" );
 	    }
 	    break;
 	case MemVeryLow:
 	    memstate = MemUnknown;
 	    QMessageBox::critical( 0 , tr("Memory Status"),
 		tr("Critical Memory Shortage\n"
 		"Please end this application\n"
 		"immediately.") );
 	    recoverMemory();
     }
     existingMessage = FALSE;
 #endif
 }
 
 bool ServerApplication::recoverMemory()
 {
     return FALSE;
 }
 
 void ServerApplication::keyClick(int , bool press, bool )
 {
     if ( press && m_keyclick_sound )
         ODevice::inst() -> keySound();
 
 }
 
 void ServerApplication::screenClick(bool press)
 {
     if ( press && m_screentap_sound )
         ODevice::inst() -> touchSound();
 }
 
 void ServerApplication::soundAlarm() {
     if ( me ()->m_alarm_sound )
         ODevice::inst()->alarmSound();
 }
 
 ServerApplication *ServerApplication::me ( )
 {
 	return static_cast<ServerApplication*>( qApp );
 }
 
 
 #include "serverapp.moc"
diff --git a/core/launcher/systray.cpp b/core/launcher/systray.cpp
index 64356ca..6122770 100644
--- a/core/launcher/systray.cpp
+++ b/core/launcher/systray.cpp
@@ -1,141 +1,149 @@
 /**********************************************************************
 ** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
 **
 ** This file is part of the Qtopia Environment.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
 **
 ** Contact info@trolltech.com if any conditions of this licensing are
 ** not clear to you.
 **
 **********************************************************************/
 
 #include <qtopia/qpeapplication.h>
 #include <qtopia/qlibrary.h>
 #include <qtopia/config.h>
 
 #include <qlayout.h>
 #include <qdir.h>
 #include <qmessagebox.h>
 #include <qtranslator.h>
 
 #include "systray.h"
 
 #include <stdlib.h>
 
 /* ### Single build floppies ### */
 #if 0
 #ifdef QT_NO_COMPONENTS
 #include "../plugins/applets/clockapplet/clockappletimpl.h"
 #endif
 #endif
 
 SysTray::SysTray( QWidget *parent ) : QFrame( parent ), layout(0)
 {
     //setFrameStyle( QFrame::Panel | QFrame::Sunken );
     loadApplets();
 }
 
 SysTray::~SysTray()
 {
     clearApplets();
 }
 
 static int compareAppletPositions(const void *a, const void *b)
 {
     const TaskbarApplet* aa = *(const TaskbarApplet**)a;
     const TaskbarApplet* ab = *(const TaskbarApplet**)b;
     int d = ab->iface->position() - aa->iface->position();
     if ( d ) return d;
     return QString::compare(ab->name,aa->name);
 }
 
 void SysTray::loadApplets()
 {
     hide();
     clearApplets();
     addApplets();
 }
 
 void SysTray::clearApplets()
 {
 #ifndef QT_NO_COMPONENTS
 
+    /*
+     * Note on clearing. SOme applets delete their
+     * applets themselves some don't do it
+     * and on restart this can crash. If we delete it
+     * here we might end up in a double deletion. We could
+     * use QGuardedPtr but that would be one QOBject
+     * for every applet more but only useful for restart
+     */
     QValueList<TaskbarApplet>::Iterator mit;
     for ( mit = appletList.begin(); mit != appletList.end(); ++mit ) {
         (*mit).iface->release();
 	(*mit).library->unload();
 	delete (*mit).library;
     }
 
 #endif
     appletList.clear();
     if ( layout )
 	delete layout;
     layout = new QHBoxLayout( this, 0, 1 );
     layout->setAutoAdd(TRUE);
 }
 
 void SysTray::addApplets()
 {
     hide();
 #ifndef QT_NO_COMPONENTS
     Config cfg( "Taskbar" );
     cfg.setGroup( "Applets" );
     QStringList exclude = cfg.readListEntry( "ExcludeApplets", ',' );
 
     QString lang = getenv( "LANG" );
     QString path = QPEApplication::qpeDir() + "/plugins/applets";
     QDir dir( path, "lib*.so" );
     QStringList list = dir.entryList();
     QStringList::Iterator it;
     int napplets=0;
     TaskbarApplet* *applets = new TaskbarApplet*[list.count()];
     for ( it = list.begin(); it != list.end(); ++it ) {
 	if ( exclude.find( *it ) != exclude.end() )
 	    continue;
 	TaskbarAppletInterface *iface = 0;
 	QLibrary *lib = new QLibrary( path + "/" + *it );
 	if (( lib->queryInterface( IID_TaskbarApplet, (QUnknownInterface**)&iface ) == QS_OK ) && iface ) {
 	    TaskbarApplet *applet = new TaskbarApplet;
 	    applets[napplets++] = applet;
 	    applet->library = lib;
 	    applet->iface = iface;
 
 	    QTranslator *trans = new QTranslator(qApp);
 	    QString type = (*it).left( (*it).find(".") );
 	    QString tfn = QPEApplication::qpeDir()+"/i18n/"+lang+"/"+type+".qm";
 	    if ( trans->load( tfn ))
 		qApp->installTranslator( trans );
 	    else
 		delete trans;
 	} else {
 	    exclude += *it;
 	    delete lib;
 	}
     }
     cfg.writeEntry( "ExcludeApplets", exclude, ',' );
     qsort(applets,napplets,sizeof(applets[0]),compareAppletPositions);
     while (napplets--) {
 	TaskbarApplet *applet = applets[napplets];
 	applet->applet = applet->iface->applet( this );
 	appletList.append(*applet);
     }
     delete [] applets;
 #else /* ## FIXME single app */
     TaskbarApplet * const applet = new TaskbarApplet();
     applet->iface = new ClockAppletImpl();
     applet->applet = applet->iface->applet( this );
     appletList.append( applet );
 #endif
     show();
 }
 
diff --git a/core/launcher/systray.h b/core/launcher/systray.h
index 77c581f..b989d58 100644
--- a/core/launcher/systray.h
+++ b/core/launcher/systray.h
@@ -1,61 +1,62 @@
 /**********************************************************************
 ** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
 **
 ** This file is part of the Qtopia Environment.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
 **
 ** Contact info@trolltech.com if any conditions of this licensing are
 ** not clear to you.
 **
 **********************************************************************/
 
 #ifndef __SYSTRAY_H__
 #define __SYSTRAY_H__
 
 #ifndef QT_NO_COMPONENT
 #include <qtopia/taskbarappletinterface.h>
 #endif
 
 #include <qframe.h>
 #include <qvaluelist.h>
+#include <qguardedptr.h>
 
 class QHBoxLayout;
 class QLibrary;
 
 struct TaskbarApplet
 {
 #ifndef QT_NO_COMPONENT
     QLibrary *library;
     TaskbarAppletInterface *iface;
 #endif
     QWidget *applet;
     QString name;
 };
 
 class SysTray : public QFrame {
     Q_OBJECT
 public:
     SysTray( QWidget *parent );
     ~SysTray();
 
     void clearApplets();
     void addApplets();
 
 private:
     void loadApplets();
     QHBoxLayout *layout;
     QValueList<TaskbarApplet> appletList;
 };
 
 
 #endif // __SYSTRAY_H__