[systemd-devel] Is %i supported in Condition?

[Michael Biebl]

Sorry, this was meant to go to the mailing list

2016-07-19 12:45 GMT+02:00 Michael Biebl <mbiebl at gmail.com>:
> 2016-07-19 12:06 GMT+02:00 Lennart Poettering <mzerqung at 0pointer.de>:
>> On Tue, 19.07.16 00:32, Michael Biebl (mbiebl at gmail.com) wrote:
>>> settings support which specifiers.
>>> But maybe I just missed it.
>>
>> It is supported.
>
> Ok, thanks
>
>
>> I figure instead of documenting which options support specifier
>> expansion and which ones do not we should rather fix all options to
>> support it...
>>
>>> I was wondering if I can use
>>>
>>> ConditionPathExists=/dev/%i
>>>
>>> Seems like this would e.g. be useful in getty at .service, which currently has
>>> ConditionPathExists=/dev/tty0
>>>
>>> This seems rather arbitrary to hard-code this to tty0
>>
>> "tty0" is a nice way to detect whether the VC system is available. The
>> instances should be cleanly skipped if the VC system is not available
>> (because compiled out of the kernel, or because of a container
>> env). If the specific tty the service is started for is missing we
>> shouldn't eat up the error however, but rightly fail.
>
> Apparently this check is too simplistic though. LXC for example
> provides tty1-tty4
>
> And starting at getty on a non-existing tty1 simply makes it fail and
> systemd restarting it (due to Restart=always)
> That is not nice.
>
>> Hope that makes sense?
>
> Well, I think it would be better if we used
> ConditionPathExists=/dev/%i in getty at .service
> Makes a lot more sense to me, tbh.
>
>
>
> --
> Why is it that all of the instruments seeking intelligent life in the
> universe are pointed away from Earth?



-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?