[RESOLVED] Console Application

[dcbasso]

Hello All,

I develop a application that will every X seconds read a file.
This already be done, but I have a big problem: I need keep the app running! I Use QTimer to Define the time of app read the file, but after read the first time the app stops to run.
I just need keep this console app alive until send some kill signal or shutdown the machine.

Any one can help me?
Thanks all!

[ElboyQt]

U should create "QApplication":qt-project.org/doc/qt-5/qapplication instance and call its "exec":http://qt-project.org/doc/qt-5/qapplication.html#exec method.

[dcbasso]

I'm using QCoreApplication! As you can see:

@
#include <QCoreApplication>
#include <control/control.h>

int main(int argc, char argv[])
{
QCoreApplication a(argc, argv);
Control control = new Control(&a);
control->start();
return a.exec();
}@

I will try QApplication...

[dcbasso]

I got this error:

/usr/bin/ld: cannot find -lGL
collect2: error: ld returned 1 exit status
make: *** [KismetLog] Error 1
17:25:54: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project KismetLog (kit: Desktop Qt 5.3 GCC 64bit)
When executing step "Make"

I add to .pro this: "QT += core xml xmlpatterns widgets" and change the main:

@
//#include <QCoreApplication>
#include <QApplication>

#include <control/control.h>

int main(int argc, char argv[])
{
// QCoreApplication a(argc, argv);
QApplication a(argc, argv);
Control control = new Control(&a);
control->start();
return a.exec();
}
@

[dcbasso]

QApplication is only for GUI apps.

http://qt-project.org/doc/qt-5/qapplication.html#details

[dcbasso]

Sorry guys... Just one error on my code!
See you!

Wrong:
@
if (this->timer = NULL) {
@

Correct:
@
if (this->timer == NULL) {
@

Very simple error. Thanks all.

[IamSumit]

Hi.
it seems you have solved problem by yourself that's good.
So, please update your thread title as [SOLVED] .
Thanks.

[Resurrection]

Related, but you could use QFileSystemWatcher instead of timer for reading the file... Unless there is a reason why you want to read it every fixed amount of time. :-)

[dcbasso]

Yes I have to read every 60 seconds the file, I will process in the raspberry and send the processed information to a server.
But I will take a look at QFileSystemWatcher, appears to be something very useful!

Thanks for your tip!