Previously, path units would remain in the running state while their
target unit is deactivating. This left a window of time where the target
unit is no longer operational (i.e. it is busy deactivating/cleaning
up/etc) but the path unit would continue to ignore inotify events. In
short: any inotify event that occurs while the target unit deactivates
would be completely lost.
With this commit, the path will go back into a waiting state when the
target unit starts deactivating. This means that any inotify event that
occurs while the target unit deactivates will queue a start job.
In general, it's better to avoid a negation. And "!" is special, because it is
used for history expansion, i.e. the same command would behave differently if
pasted on the command line.
Inspired by 4a899c5a23.
When a service is triggered by a path unit, pass the
path unit name and the path that triggered it via env vars
to the spawned processes.
Note that this is best-effort, as there might be many triggers
at the same time, but we only get woken up by one.
For most fields, the text shown by `.id` is the value that should be set
in the unit file; however, for RestrictNamespaces, it is not. Changing
this to show the actual text makes it more clear to a user what the
actual change that needs to be made to the unit file is.
Adrian Vovk
Zbigniew Jędrzejewski-Szmek
Frantisek Sumsal
Yu Watanabe
Luca Boccassi
Luca Boccassi
Kyle Laker
Maanya Goenka