Use promises with node-dbus 1.0.0.

dbus-promise.js

'use strict';

const Promise = require('bluebird');
const DBus = require('dbus');
const Bus = require('dbus/lib/bus');
const Interface = require('dbus/lib/interface');

Promise.promisifyAll(Bus.prototype);
Promise.promisifyAll(Interface.prototype);

const oldInit = Interface.prototype.init;

Interface.prototype.init = function(...args) {
        oldInit.apply(this, args);

        Promise.promisifyAll(this);
}

module.exports = DBus;

systemd.js

'use strict';

const SERVICE = 'org.freedesktop.systemd1';
const MANAGER_OBJECT = '/org/freedesktop/systemd1';
const MANAGER_INTERFACE = 'org.freedesktop.systemd1.Manager';
const UNIT_INTERFACE = 'org.freedesktop.systemd1.Unit';

const DBus = require('./dbus-promise');

const bus = DBus.getBus('system');

bus.getInterfaceAsync(SERVICE, MANAGER_OBJECT, MANAGER_INTERFACE)
        .then(manager => manager.GetUnitAsync('ssh.service'))
        .then(objectPath => bus.getInterfaceAsync(SERVICE, objectPath, UNIT_INTERFACE))
        .then(unit => unit.getPropertyAsync('ActiveState'))
        //.then(unit => unit.getPropertiesAsync())
        .then(state => console.log(state))
        .catch(err => console.log(err))
        .finally(() => bus.disconnect());

use.js

const DBus = require('./dbus-promise');

const bus = DBus.getBus('session');
bus.getInterfaceAsync('org.freedesktop.DBus', '/', 'org.freedesktop.DBus')
        .then(iface => {
                return iface.ListNamesAsync({ timeout: 5000 });
        })
        .then(names => {
                console.log(names);
        })
        .catch(err => {
                console.log(err);
        })
        .finally(() => {
                bus.disconnect();
        });