void listObjects(const QString &service, const QString &path)
{
    QDBusInterfacePtr iface(*connection, service, path.isEmpty() ? "/" : path,
                   "org.freedesktop.DBus.Introspectable");
    if (!iface->isValid()) {
        QDBusError err(iface->lastError());
        fprintf(stderr, "Cannot introspect object %s at %s:\n%s (%s)\n",
                qPrintable(path.isEmpty() ? "/" : path), qPrintable(service),
                qPrintable(err.name()), qPrintable(err.message()));
        exit(1);
    }
    QDBusReply<QString> xml = iface->call("Introspect");

    if (xml.isError())
        return;                 // silently

    QDomDocument doc;
    doc.setContent(xml);
    QDomElement node = doc.documentElement();
    QDomElement child = node.firstChildElement();
    while (!child.isNull()) {
        if (child.tagName() == QLatin1String("node")) {
            QString sub = path + '/' + child.attribute("name");
            printf("%s\n", qPrintable(sub));
            listObjects(service, sub);
        }
        child = child.nextSiblingElement();
    }
}
void listAllInterfaces(const QString &service, const QString &path)
{
    QDBusInterfacePtr iface(*connection, service, path, "org.freedesktop.DBus.Introspectable");
    if (!iface->isValid()) {
        QDBusError err(iface->lastError());
        fprintf(stderr, "Cannot introspect object %s at %s:\n%s (%s)\n",
                qPrintable(path), qPrintable(service),
                qPrintable(err.name()), qPrintable(err.message()));
        exit(1);
    }
    QDBusReply<QString> xml = iface->call("Introspect");

    if (xml.isError())
        return;                 // silently

    QDomDocument doc;
    doc.setContent(xml);
    QDomElement node = doc.documentElement();
    QDomElement child = node.firstChildElement();
    while (!child.isNull()) {
        if (child.tagName() == QLatin1String("interface")) {
            QString ifaceName = child.attribute("name");
            if (QDBusUtil::isValidInterfaceName(ifaceName))
                listInterface(service, path, ifaceName);
            else {
                qWarning("Invalid D-BUS interface name '%s' found while parsing introspection",
                         qPrintable(ifaceName));
            }
        }
        child = child.nextSiblingElement();
    }
}