In this context, a clean exit means
an exit code of 0, or one of the signals
SIGHUP, SIGINT, SIGTERM, or SIGPIPE, and
- additonally, exit statuses and signals
+ additionally, exit statuses and signals
specified in <varname>SuccessExitStatus=</varname>.
If set to <option>on-failure</option>
the service will be restarted when the