Execute shell script using QProcess

main.cpp

#include <QCoreApplication>
#include <QProcess>
#include <QDebug>

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

    QProcess process;
    QObject::connect(&process, &QProcess::errorOccurred, [&process](){
        qWarning() << "Error starting shell:" << process.errorString();
        QCoreApplication::quit();
    });
    QObject::connect(&process, &QProcess::readyReadStandardOutput, [&process](){
        qDebug() << process.readAllStandardOutput();
    });
    QObject::connect(&process, &QProcess::readyReadStandardError, [&process](){
        qWarning() << "Error running script:" << process.readAllStandardError();
    });
    QObject::connect(&process, &QProcess::finished, [&process](){
        QCoreApplication::quit();
    });

    process.start("/usr/bin/sh", { "-c", "echo hello" });

    return app.exec();
}