[Qt-interest] Cleanly exit Qt app with <CTRL-C> from Linux console

[Markus Franke]

Dear all,

during system development I am running my Qt application from a console. 

If I press <CTRL-C> within the console a SIGINT is sent to the application 
which is catched by a signal handler. From within this signal handler I am 
calling QApplication::exit(0) which in turn calls the Destructor of my 
main QApplication object. 

>From time to time I observe that the application hangs for about 30 
seconds just at the last line of my main() function which returns the 
return value of QApplication::exec(). (see code below)

---snip---
int main(int argc, char *argv[])
{
    Application* app = new Application(argc, argv);

    int ret = app->exec();

    delete app;

    qDebug("This line is still reached");
    return ret; // this line is hanging for about 30 seconds
}
---snap---

Is there anything else which I have to take care off if I want to exit my 
application via <CTRL-C>?


Thanks in advance and with best regards,
Markus


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