QProcess : child process listening parent output ?

[Nyphel]

Hello,

I know that the QProcess problem has been discussed many times, but there is one thing I can't find on the forum : How the child application can handle the main application's instructons writted on the output channel ?



My main application creates a QProcess linked to "src_2.exe" and listen its output channel :

Veilleur::Veilleur(QWidget *parent) : QObject(parent)
{		
	myProcess = new QProcess(this);
	myProcess->setReadChannelMode(QProcess::MergedChannels);
	connect(myProcess, SIGNAL(readyRead()), this, SLOT(SLOT_onReadyReadOut()));
 
	myProcess->start("../../src_2/release/src_2.exe");
 
	myProcess->write("An instruction to perform...");
}

Veilleur::Veilleur(QWidget *parent) : QObject(parent)
{		
	myProcess = new QProcess(this);
	myProcess->setReadChannelMode(QProcess::MergedChannels);
	connect(myProcess, SIGNAL(readyRead()), this, SLOT(SLOT_onReadyReadOut()));

	myProcess->start("../../src_2/release/src_2.exe");

	myProcess->write("An instruction to perform...");
}

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void Veilleur::SLOT_onReadyReadOut()
{
	std::cout << "\nReading the child application, on its stdout channel : " << std::endl;
	QString message = "";
	message.append(myProcess->readAllStandardOutput());
	std::cout << "." << message.toStdString() << "." << std::endl;
}

void Veilleur::SLOT_onReadyReadOut()
{
	std::cout << "\nReading the child application, on its stdout channel : " << std::endl;
	QString message = "";
	message.append(myProcess->readAllStandardOutput());
	std::cout << "." << message.toStdString() << "." << std::endl;
}

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My "src_2" application is the following :

man.cpp :

#include <QApplication>
 
#include "MailChecker.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
			MailChecker * mChecker = new MailChecker();
			mChecker->Check();
 
    return app.exec();
}

#include <QApplication>
 
#include "MailChecker.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

			MailChecker * mChecker = new MailChecker();
			mChecker->Check();

    return app.exec();
}

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MailChecker constructor :

MailChecker::MailChecker() : QObject()
{	
	std::cout << "Message for the parent application : I'm here !" << std::endl;
}

MailChecker::MailChecker() : QObject()
{	
	std::cout << "Message for the parent application : I'm here !" << std::endl;
}

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So I would like the child application doing the same job as the parent application.
I would like it to listen the output channel of the parent, in order to give it instructions.
I can't understand how to do it, but I think it would be similar to what i've done for the parent one.

In the parent one it wasn't too difficult, cause I could create my own child application and recognize it every where : she was the "myProcess".
But in the new child application I can't access to the parent one, in order to declare a connect like :
connect(myParentProcess, SIGNAL(readyRead()), this, SLOT(SLOT_onReadyReadOut()));

And how if I could identify the "myParentProcess", where should I declare the connection ?



Thanks for your help