Running a Unix command programmatically with QT

[kloveridge]

I am just learning unix and QT. I want to send a command out through qt to Unix. I've tried this code and I don't get the result i do when I do it in the terminal. What is going wrong here?

Header:
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "QProcess"

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private slots:
void on_pushButton_clicked();

private:
Ui::MainWindow *ui;
QProcess *m_process;
};

#endif // MAINWINDOW_H@

CPP
@#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QDebug"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
m_process = new QProcess(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::on_pushButton_clicked()
{
QString cmd = "printf "testnc" | nc localhost 1235";
qDebug() << cmd;

m_process->start(cmd);
qDebug() << "Got here.";

}
@

[kloveridge]

When I click the go button, the code executes but my "listener" at the other end isn't getting the message.

If I run the command:

printf "testnc" | nc localhost 1235

from the terminal, my listener picks it up fine.

[sierdzio]

Piping does not work in QProcess.

You can simulate it be redirecting output from one QProcess to the other. Or use my "QEasyShell":https://github.com/sierdzio/qeasyshell project, it might just work ;P.