QT Open default file explorer on *nix

I have the following:

QProcess *process = new QProcess(this);
QString path = QDir::toNativeSeparators(QApplication::applicationPath);
#if defined(Q_OS_WIN)

process->start("explorer.exe",  QStringList() << path);

#elif defined(Q_OS_MAC)

process->start("open", QStringList() << path);

#endif

How I can achieve the same behavior for let say Ubuntu?