Yep, it's close. But you still depend on the unholy mess that is nsswitch.conf

It's still a bit worrying, with manual JSON parsing: https://github.com/systemd/systemd/blob/79f487038444646f5bce... But at least it's just ~600 lines of fairly straightforward code.

You also can get most of it with nscd.

(Sigh, I wish BUS1 guys pushed their project to completion)