for all units. It should be both a way to pin units into memory as well as a
wait to retrieve their exit data.
-* maybe set a new set of env vars for services, based on RuntimeDirectory=,
- StateDirectory=, LogsDirectory=, CacheDirectory= and ConfigurationDirectory=
- automatically. For example, there could be $RUNTIME_DIRECTORY,
- $STATE_DIRECTORY, $LOGS_DIRECTORY=, $CACHE_DIRECTORY and
- $CONFIGURATION_DIRECTORY or so. This could be useful to write services that
- can adapt to varying directories for these purposes. Special care has to be
- taken if multiple dirs are configured. Maybe avoid setting the env vars in
- that case?
-
* expose IO accounting data on the bus, show it in systemd-run --wait and log
about it in the resource log message