dbus-broker is in fact more specific than that. It does not function on all Linux operating systems, only the systemd ones.

It too, like Cockpit here (as shown at https://news.ycombinator.com/item?id=16448768), talks directly to the idiosyncratic systemd process #1 API (rather than, say, using the "service" command to start services on demand).

* https://github.com/bus1/dbus-broker/blob/07e43501e418c8066c7...