Opening KDE Konsole from Qt and sending a command



  • Ok, so I need to open a KDE linux terminal console from my Qt program, and this is what I've done to achieve that:

    @QProcess p1;
    p1.startDetached("konsole");
    p1.waitForFinished();
    @

    And this works fine.

    The problem is: after I open the console (by the way, it has to be konsole, can't use any "console" function inside Qt), I need to pass a command to it, i.e. I want the console to execute "ps -al" or any other command.

    I read a lot about QProcess and all that, and I tried to do the following:

    @QProcess p1;
    p1.startDetached("konsole");
    p1.waitForStarted();
    p1.write("echo hello\n");
    p1.waitForBytesWritten();
    p1.waitForFinished();
    @

    I even tried to replace startDetached by start since I read that it could be a problem, but again the console that was opened didn't print anything.

    Any ideas how I could open a console and send a command to that console (preferably using p1.startDetached instead of p1.start)?



  • Maybe you need to start BASH instead of konsole?

    @bash -c "ps -al"@

    @ QProcess process;
    process.start("bash", QStringList()<<"-c"<<"ps -al");
    process.waitForFinished();
    qDebug()<<process.readAll();@



  • Not sure, but perhaps Konsole exposes a DBUS interface you can use?

    Edit
    Yes, it turns out Konsole does! I found this:
    @
    qdbus org.kde.konsole /Sessions/$session_num sendText "$command"
    sleep 0.1
    qdbus org.kde.konsole /Sessions/$session_num sendText $'\n'
    sleep 0.1@

    See http://www.linuxjournal.com/content/start-and-control-konsole-dbus

    That means that you should also be able to do this directly from Qt itself, as Qt also supports DBUS directly.



  • I read that but I still have no clue how to do it :(

    I did a quick QDBus code in the past, just to receive data from HAL when a device was removed:
    @
    QDBusConnection::systemBus().connect(
    "org.freedesktop.Hal",
    "/org/freedesktop/Hal/Manager",
    "org.freedesktop.Hal.Manager",
    "DeviceRemoved",
    this, SLOT(deviceRemoved(const QString)));
    @

    But I don't know how I could make use of that to send a command to a Konsole QApplication.





  • Why don't you just use something like this?

    konsole --nofork --hold -e 'ls'


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