QString comand = QString("bzip2 -d ") + QDir::currentPath() +
QString("/archives/1.bz2");
QProcess unarchiveProcess;
unarchiveProcess.start(comand);
if(!unarchiveProcess.waitForStarted(500)){
    qDebug() << "start failed";
}
if(!unarchiveProcess.waitForFinished(5000)){
    qDebug() << "stop failed";
    unarchiveProcess.close();
    unarchiveProcess.waitForFinished();
    unarchiveProcess.Disconnection();
}