On Fri, 27.07.12 18:08, Manuel Amador (Rudd-O) ([email protected]) wrote: > I need to run a program right before any file system is unmounted, to > record the current file system state on disk. > > What Requires/RequiredBy, Wants/WantedBy, Before/After dependencies > should I encode in my unit file?
Do it like this: [Service] ExecStart=/bin/true ExecStop=/my/little/program RemainAfterExit=yes then simply enable this like any other program from multi-user.target or so. This will make a service available that is started at boot (but is a NOP mostly) and then stopped at shutdown before all local mounts are gone. Yes, this is not really a nice solution, and we can certainly improve this. For starters the ExecStart=/bin/true is currently necessary (since we require all services to have ExecStart), but we should make that unnecessary, if possible. And it is indeed confusing that for starting a service a shutdown that is ordered against the local mounts you actually need to start it early and then stop it a shutdown. But anyway, hope this helps, Lennart -- Lennart Poettering - Red Hat, Inc. _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
