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557 lines
15 KiB
557 lines
15 KiB
//===========================================================================
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//
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// This file is part of the TDE project
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//
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// Copyright (c) 1999 Martin R. Jones <mjones@kde.org>
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// Copyright (c) 2012 Timothy Pearson <kb9vqf@pearsoncomputing.net>
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//
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#include <config.h>
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#include <stdlib.h>
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#include <kstandarddirs.h>
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#include <kapplication.h>
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#include <kservicegroup.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <tqfile.h>
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#include <tqtimer.h>
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#include <dcopclient.h>
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#include <assert.h>
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#include "lockeng.h"
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#include "lockeng.moc"
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#include "kdesktopsettings.h"
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#include "xautolock_c.h"
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extern xautolock_corner_t xautolock_corners[ 4 ];
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bool trinity_lockeng_sak_available = TRUE;
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SaverEngine* m_masterSaverEngine = NULL;
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static void sigusr1_handler(int)
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{
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if (m_masterSaverEngine) {
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m_masterSaverEngine->slotLockProcessWaiting();
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}
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}
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static void sigusr2_handler(int)
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{
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if (m_masterSaverEngine) {
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m_masterSaverEngine->slotLockProcessFullyActivated();
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}
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}
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//===========================================================================
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//
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// Screen saver engine. Doesn't handle the actual screensaver window,
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// starting screensaver hacks, or password entry. That's done by
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// a newly started process.
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//
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SaverEngine::SaverEngine()
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: TQWidget(),
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KScreensaverIface(),
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mBlankOnly(false),
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mSAKProcess(NULL),
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mTerminationRequested(false)
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{
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struct sigaction act;
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// handle SIGUSR1
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m_masterSaverEngine = this;
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act.sa_handler= sigusr1_handler;
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sigemptyset(&(act.sa_mask));
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sigaddset(&(act.sa_mask), SIGUSR1);
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act.sa_flags = 0;
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sigaction(SIGUSR1, &act, 0L);
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// handle SIGUSR2
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m_masterSaverEngine = this;
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act.sa_handler= sigusr2_handler;
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sigemptyset(&(act.sa_mask));
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sigaddset(&(act.sa_mask), SIGUSR2);
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act.sa_flags = 0;
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sigaction(SIGUSR2, &act, 0L);
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// Save X screensaver parameters
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XGetScreenSaver(tqt_xdisplay(), &mXTimeout, &mXInterval,
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&mXBlanking, &mXExposures);
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mState = Waiting;
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mXAutoLock = 0;
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mEnabled = false;
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connect(&mLockProcess, TQT_SIGNAL(processExited(KProcess *)),
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TQT_SLOT(lockProcessExited()));
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mSAKProcess = new KProcess;
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*mSAKProcess << "tdmtsak";
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connect(mSAKProcess, TQT_SIGNAL(processExited(KProcess*)), this, TQT_SLOT(slotSAKProcessExited()));
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TQTimer::singleShot( 0, this, TQT_SLOT(handleSecureDialog()) );
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configure();
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mLockProcess.clearArguments();
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TQString path = KStandardDirs::findExe( "kdesktop_lock" );
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if( path.isEmpty())
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{
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kdDebug( 1204 ) << "Can't find kdesktop_lock!" << endl;
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}
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mLockProcess << path;
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mLockProcess << TQString( "--internal" ) << TQString( "%1" ).arg(getpid());
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if (mLockProcess.start() == false )
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{
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kdDebug( 1204 ) << "Failed to start kdesktop_lock!" << endl;
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}
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}
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//---------------------------------------------------------------------------
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//
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// Destructor - usual cleanups.
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//
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SaverEngine::~SaverEngine()
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{
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if (mState == Waiting) {
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kill(mLockProcess.pid(), SIGKILL);
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}
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mLockProcess.detach(); // don't kill it if we crash
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delete mXAutoLock;
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// Restore X screensaver parameters
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XSetScreenSaver(tqt_xdisplay(), mXTimeout, mXInterval, mXBlanking,
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mXExposures);
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}
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//---------------------------------------------------------------------------
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// This should be called only using DCOP.
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void SaverEngine::lock()
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{
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bool ok = true;
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if (mState != Saving)
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{
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mSAKProcess->kill(SIGTERM);
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ok = startLockProcess( ForceLock );
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// It takes a while for kdesktop_lock to start and lock the screen.
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// Therefore delay the DCOP call until it tells kdesktop that the locking is in effect.
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// This is done only for --forcelock .
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if( ok && mState != Saving )
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{
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DCOPClientTransaction* trans = kapp->dcopClient()->beginTransaction();
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mLockTransactions.append( trans );
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}
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}
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else
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{
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mLockProcess.kill( SIGHUP );
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}
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}
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void SaverEngine::processLockTransactions()
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{
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for( TQValueVector< DCOPClientTransaction* >::ConstIterator it = mLockTransactions.begin();
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it != mLockTransactions.end();
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++it )
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{
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TQCString replyType = "void";
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TQByteArray arr;
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kapp->dcopClient()->endTransaction( *it, replyType, arr );
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}
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mLockTransactions.clear();
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}
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void SaverEngine::saverLockReady()
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{
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if( mState != Preparing )
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{
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kdDebug( 1204 ) << "Got unexpected saverReady()" << endl;
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}
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kdDebug( 1204 ) << "Saver Lock Ready" << endl;
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processLockTransactions();
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}
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//---------------------------------------------------------------------------
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void SaverEngine::save()
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{
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if (mState == Waiting)
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{
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mSAKProcess->kill(SIGTERM);
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startLockProcess( DefaultLock );
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}
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}
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//---------------------------------------------------------------------------
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void SaverEngine::quit()
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{
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if (mState == Saving || mState == Preparing)
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{
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stopLockProcess();
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}
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}
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//---------------------------------------------------------------------------
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bool SaverEngine::isEnabled()
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{
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return mEnabled;
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}
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//---------------------------------------------------------------------------
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bool SaverEngine::enable( bool e )
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{
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if ( e == mEnabled )
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return true;
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// If we aren't in a suitable state, we will not reconfigure.
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if (mState != Waiting)
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return false;
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mEnabled = e;
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if (mEnabled)
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{
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if ( !mXAutoLock ) {
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mXAutoLock = new XAutoLock();
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connect(mXAutoLock, TQT_SIGNAL(timeout()), TQT_SLOT(idleTimeout()));
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}
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mXAutoLock->setTimeout(mTimeout);
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mXAutoLock->setDPMS(true);
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//mXAutoLock->changeCornerLockStatus( mLockCornerTopLeft, mLockCornerTopRight, mLockCornerBottomLeft, mLockCornerBottomRight);
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// We'll handle blanking
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XSetScreenSaver(tqt_xdisplay(), mTimeout + 10, mXInterval, PreferBlanking, mXExposures);
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kdDebug() << "XSetScreenSaver " << mTimeout + 10 << endl;
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mXAutoLock->start();
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kdDebug(1204) << "Saver Engine started, timeout: " << mTimeout << endl;
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}
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else
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{
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if (mXAutoLock)
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{
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delete mXAutoLock;
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mXAutoLock = 0;
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}
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XForceScreenSaver(tqt_xdisplay(), ScreenSaverReset );
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XSetScreenSaver(tqt_xdisplay(), 0, mXInterval, PreferBlanking, DontAllowExposures);
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kdDebug(1204) << "Saver Engine disabled" << endl;
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}
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return true;
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}
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//---------------------------------------------------------------------------
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bool SaverEngine::isBlanked()
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{
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return (mState != Waiting);
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}
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void SaverEngine::enableExports()
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{
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#ifdef Q_WS_X11
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kdDebug(270) << k_lineinfo << "activating background exports.\n";
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DCOPClient *client = kapp->dcopClient();
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if (!client->isAttached()) {
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client->attach();
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}
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TQByteArray data;
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TQDataStream args( data, IO_WriteOnly );
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args << 1;
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TQCString appname( "kdesktop" );
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int screen_number = DefaultScreen(tqt_xdisplay());
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if ( screen_number )
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appname.sprintf("kdesktop-screen-%d", screen_number );
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client->send( appname, "KBackgroundIface", "setExport(int)", data );
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#endif
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}
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//---------------------------------------------------------------------------
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void SaverEngine::handleSecureDialog()
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{
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// Wait for SAK press
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if (!mSAKProcess->isRunning()) mSAKProcess->start();
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}
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void SaverEngine::slotSAKProcessExited()
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{
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int retcode = mSAKProcess->exitStatus();
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if ((retcode != 0) && (mSAKProcess->normalExit())) {
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trinity_lockeng_sak_available = FALSE;
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printf("[kdesktop] SAK driven secure dialog is not available for use (retcode %d). Check tdmtsak for proper functionality.\n", retcode); fflush(stdout);
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}
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if ((mSAKProcess->normalExit()) && (trinity_lockeng_sak_available == TRUE)) {
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bool ok = true;
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if (mState == Waiting)
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{
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ok = startLockProcess( SecureDialog );
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if( ok && mState != Saving )
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{
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}
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}
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else
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{
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mLockProcess.kill( SIGHUP );
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}
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}
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}
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//---------------------------------------------------------------------------
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//
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// Read and apply configuration.
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//
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void SaverEngine::configure()
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{
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// If we aren't in a suitable state, we will not reconfigure.
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if (mState != Waiting)
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return;
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// create a new config obj to ensure we read the latest options
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KDesktopSettings::self()->readConfig();
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bool e = KDesktopSettings::screenSaverEnabled();
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mTimeout = KDesktopSettings::timeout();
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mEnabled = !e; // force the enable()
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int action;
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action = KDesktopSettings::actionTopLeft();
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xautolock_corners[0] = applyManualSettings(action);
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action = KDesktopSettings::actionTopRight();
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xautolock_corners[1] = applyManualSettings(action);
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action = KDesktopSettings::actionBottomLeft();
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xautolock_corners[2] = applyManualSettings(action);
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action = KDesktopSettings::actionBottomRight();
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xautolock_corners[3] = applyManualSettings(action);
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enable( e );
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}
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//---------------------------------------------------------------------------
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//
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// Set a variable to indicate only using the blanker and not the saver.
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//
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void SaverEngine::setBlankOnly( bool blankOnly )
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{
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mBlankOnly = blankOnly;
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// FIXME: if running, stop and restart? What about security
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// implications of this?
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}
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//---------------------------------------------------------------------------
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//
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// Start the screen saver.
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//
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bool SaverEngine::startLockProcess( LockType lock_type )
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{
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if (mState == Saving)
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return true;
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enableExports();
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kdDebug(1204) << "SaverEngine: starting saver" << endl;
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emitDCOPSignal("KDE_start_screensaver()", TQByteArray());
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if (!mLockProcess.isRunning()) {
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mLockProcess.clearArguments();
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TQString path = KStandardDirs::findExe( "kdesktop_lock" );
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if( path.isEmpty())
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{
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kdDebug( 1204 ) << "Can't find kdesktop_lock!" << endl;
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return false;
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}
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mLockProcess << path;
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mLockProcess << TQString( "--internal" ) << TQString( "%1" ).arg(getpid());
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if (mLockProcess.start() == false )
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{
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kdDebug( 1204 ) << "Failed to start kdesktop_lock!" << endl;
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return false;
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}
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}
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switch( lock_type )
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{
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case ForceLock:
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mLockProcess.kill(SIGUSR1); // Request forcelock
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break;
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case DontLock:
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mLockProcess.kill(SIGUSR2); // Request dontlock
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break;
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case SecureDialog:
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mLockProcess.kill(SIGWINCH); // Request secure dialog
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break;
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default:
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break;
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}
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if (mBlankOnly) {
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mLockProcess.kill(SIGTTIN); // Request blanking
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}
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mLockProcess.kill(SIGTTOU); // Start lock
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XSetScreenSaver(tqt_xdisplay(), 0, mXInterval, PreferBlanking, mXExposures);
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mState = Preparing;
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if (mXAutoLock)
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{
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mXAutoLock->stop();
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}
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return true;
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}
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//---------------------------------------------------------------------------
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//
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// Stop the screen saver.
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//
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void SaverEngine::stopLockProcess()
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{
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if (mState == Waiting)
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{
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kdWarning(1204) << "SaverEngine::stopSaver() saver not active" << endl;
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return;
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}
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kdDebug(1204) << "SaverEngine: stopping lock" << endl;
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emitDCOPSignal("KDE_stop_screensaver()", TQByteArray());
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mTerminationRequested=true;
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mLockProcess.kill();
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if (mEnabled)
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{
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if (mXAutoLock)
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{
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mXAutoLock->start();
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}
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XForceScreenSaver(tqt_xdisplay(), ScreenSaverReset );
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XSetScreenSaver(tqt_xdisplay(), mTimeout + 10, mXInterval, PreferBlanking, mXExposures);
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}
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processLockTransactions();
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mState = Waiting;
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}
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void SaverEngine::lockProcessExited()
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{
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bool abnormalExit = false;
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if (mLockProcess.normalExit() == false) {
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abnormalExit = true;
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}
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else {
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if (mLockProcess.exitStatus() != 0) {
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abnormalExit = true;
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}
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}
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if (mTerminationRequested == true) {
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abnormalExit = false;
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mTerminationRequested = false;
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}
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if (abnormalExit == true) {
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// PROBABLE HACKING ATTEMPT DETECTED
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// Terminate the TDE session ASAP!
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// Values are explained at http://lists.kde.org/?l=kde-linux&m=115770988603387
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TQByteArray data;
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TQDataStream arg(data, IO_WriteOnly);
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arg << (int)0 << (int)0 << (int)2;
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if ( ! kapp->dcopClient()->send("ksmserver", "default", "logout(int,int,int)", data) ) {
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// Someone got to DCOP before we did
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// Try an emergency system logout
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system("logout");
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}
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}
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else {
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// Restart the lock process
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if (!mLockProcess.isRunning()) {
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mLockProcess.clearArguments();
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TQString path = KStandardDirs::findExe( "kdesktop_lock" );
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if( path.isEmpty())
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{
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kdDebug( 1204 ) << "Can't find kdesktop_lock!" << endl;
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}
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mLockProcess << path;
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mLockProcess << TQString( "--internal" ) << TQString( "%1" ).arg(getpid());
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if (mLockProcess.start() == false )
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{
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kdDebug( 1204 ) << "Failed to start kdesktop_lock!" << endl;
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}
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}
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}
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}
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void SaverEngine::slotLockProcessWaiting()
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{
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// lockProcessWaiting cannot be called directly from a signal handler, as it will hang in certain obscure circumstances
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// Instead we use a single-shot timer to immediately call lockProcessWaiting once control has returned to the Qt main loop
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TQTimer::singleShot(0, this, SLOT(lockProcessWaiting()));
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}
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void SaverEngine::slotLockProcessFullyActivated()
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{
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mState = Saving;
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}
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void SaverEngine::lockProcessWaiting()
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{
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kdDebug(1204) << "SaverEngine: lock exited" << endl;
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if (trinity_lockeng_sak_available == TRUE) {
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handleSecureDialog();
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}
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if( mState == Waiting )
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return;
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emitDCOPSignal("KDE_stop_screensaver()", TQByteArray());
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if (mEnabled)
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{
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if (mXAutoLock)
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{
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mXAutoLock->start();
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}
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XForceScreenSaver(tqt_xdisplay(), ScreenSaverReset );
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XSetScreenSaver(tqt_xdisplay(), mTimeout + 10, mXInterval, PreferBlanking, mXExposures);
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}
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processLockTransactions();
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mState = Waiting;
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}
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//---------------------------------------------------------------------------
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//
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// XAutoLock has detected the required idle time.
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//
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void SaverEngine::idleTimeout()
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{
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// disable X screensaver
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XForceScreenSaver(tqt_xdisplay(), ScreenSaverReset );
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XSetScreenSaver(tqt_xdisplay(), 0, mXInterval, PreferBlanking, DontAllowExposures);
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mSAKProcess->kill(SIGTERM);
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startLockProcess( DefaultLock );
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}
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xautolock_corner_t SaverEngine::applyManualSettings(int action)
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{
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if (action == 0)
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{
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kdDebug() << "no lock" << endl;
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return ca_nothing;
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}
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else
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if (action == 1)
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{
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kdDebug() << "lock screen" << endl;
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return ca_forceLock;
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}
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else
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if (action == 2)
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{
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kdDebug() << "prevent lock" << endl;
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return ca_dontLock;
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}
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else
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{
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kdDebug() << "no lock nothing" << endl;
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return ca_nothing;
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}
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}
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