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/***************************************************************************
* Copyright (C) 2006 by Tobias Koenig <tokoe@kde.org> *
* Copyright (C) 2008-2011 by Sebastian Trueg <trueg@kde.org> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library 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 Library 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. *
***************************************************************************/
#include "processcontrol.h"
#include <QtCore/QDebug>
#include <QtCore/QTimer>
#include <QtCore/QCoreApplication>
#include <KDebug>
ProcessControl::ProcessControl( QObject *parent )
: QObject( parent ), mFailedToStart( false ), mCrashCount( 0 )
{
connect( &mProcess, SIGNAL( error( QProcess::ProcessError ) ),
this, SLOT( slotError( QProcess::ProcessError ) ) );
connect( &mProcess, SIGNAL( finished( int, QProcess::ExitStatus ) ),
this, SLOT( slotFinished( int, QProcess::ExitStatus ) ) );
connect( &mProcess, SIGNAL( readyReadStandardError() ),
this, SLOT( slotErrorMessages() ) );
connect( &mProcess, SIGNAL( readyReadStandardOutput() ),
this, SLOT( slotStdoutMessages() ) );
}
ProcessControl::~ProcessControl()
{
mProcess.disconnect(this);
terminate(true);
}
void ProcessControl::start( const QString &application, const QStringList &arguments, CrashPolicy policy, int maxCrash )
{
mFailedToStart = false;
mApplication = application;
mArguments = arguments;
mPolicy = policy;
mCrashCount = maxCrash;
start();
}
void ProcessControl::setCrashPolicy( CrashPolicy policy )
{
mPolicy = policy;
}
void ProcessControl::slotError( QProcess::ProcessError error )
{
switch ( error ) {
case QProcess::Crashed:
// do nothing, we'll respawn in slotFinished
break;
case QProcess::FailedToStart:
default:
mFailedToStart = true;
break;
}
qDebug( "ProcessControl: Application '%s' stopped unexpected (%s)",
qPrintable( mApplication ), qPrintable( mProcess.errorString() ) );
}
void ProcessControl::slotFinished( int exitCode, QProcess::ExitStatus exitStatus )
{
// the process went down -> inform clients
emit finished(false);
// Since Nepomuk services are KApplications and, thus, use DrKonqi QProcess does not
// see a crash as an actual CrashExit but as a normal exit with an exit code != 0
if ( exitStatus == QProcess::CrashExit ||
exitCode != 0 ) {
if ( mPolicy == RestartOnCrash ) {
// don't try to start an unstartable application
if ( !mFailedToStart && --mCrashCount >= 0 ) {
qDebug( "Application '%s' crashed! %d restarts left.", qPrintable( commandLine() ), mCrashCount );
start();
}
else {
if ( mFailedToStart ) {
qDebug( "Application '%s' failed to start!", qPrintable( commandLine() ) );
}
else {
qDebug( "Application '%s' crashed to often. Giving up!", qPrintable( commandLine() ) );
}
}
}
else {
qDebug( "Application '%s' crashed. No restart!", qPrintable( commandLine() ) );
}
}
else {
qDebug( "Application '%s' exited normally...", qPrintable( commandLine() ) );
}
}
void ProcessControl::slotErrorMessages()
{
QString message = QString::fromUtf8( mProcess.readAllStandardError() );
emit processErrorMessages( message );
qDebug( "[%s] %s", qPrintable( mApplication ), qPrintable( message.trimmed() ) );
}
void ProcessControl::start()
{
mProcess.start( mApplication, mArguments );
}
void ProcessControl::slotStdoutMessages()
{
QString message = QString::fromUtf8( mProcess.readAllStandardOutput() );
qDebug() << mApplication << "[out]" << message;
}
bool ProcessControl::isRunning() const
{
return mProcess.state() != QProcess::NotRunning;
}
QString ProcessControl::commandLine() const
{
return mApplication + QLatin1String(" ") + mArguments.join(QLatin1String(" "));
}
void ProcessControl::terminate( bool waitAndKill )
{
if(isRunning()) {
mProcess.terminate();
// kill if not stopped after timeout
if(waitAndKill ||
QCoreApplication::instance()->closingDown()) {
if(!mProcess.waitForFinished(20000)) {
mProcess.kill();
}
}
else {
QTimer::singleShot(20000, &mProcess, SLOT(kill()));
}
}
}
bool ProcessControl::waitForStarted()
{
return mProcess.waitForStarted();
}
#include "processcontrol.moc"
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