Run sio2jail self-check with Sio2jailExecutor #280
Merged
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We currently don't pass enough cmdline arguments to sio2jail self-check,
which makes it fail erroneously on some system configurations.
This change prevents that from happening, by using Sio2jailExecutor to
run the self check.
Notably this change required adding the original cmdline to
ExecutionResult for logging errors later - this feels like a leaky
abstraction, but that class actually already carries the process exit
signal and stderr.
Also improved sio2jail related error messages for better user experience.