[systemd-devel] Synchronization Between Services at Shutdown

[Andrei Borzenkov]

В Fri, 3 Apr 2015 14:04:10 +0200
Lennart Poettering <lennart at poettering.net> пишет:

> On Thu, 02.04.15 16:28, Martin Pitt (martin.pitt at ubuntu.com) wrote:
> 
> > Lennart Poettering [2015-04-02 13:03 +0200]:
> > > Yeah, and rightfully so. I mean, a service really should be able to
> > > shutdown if dbus is dead. In fact, it should be able to shutdown in
> > > pretty much any situation...
> > 
> > They do, but that's irrelevant here. The problem is that dbus.service
> > shuts down very early as nothing prevents it from that. All
> > dependencies just refer to dbus.socket, but TBH socket (re-)activation
> > totally doesn't work for dbus.
> 
> systemd will not reactivate services when shutting down, we refuse to
> go in circles...
> 

Could you elaborate? systemd will obviously start services when
starting shutdown.target. How does systemd differentiate between
services that can and can not be started?