Default runit services

Default runit services

[Stefan Mühlinghaus]

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Is it neccessary for all default runit services (e.g. 6 TTYs) to be active? 
I usually never need more then 2 but when I remove TTY3-6 from /var/service 
the next update of the runit package puts them back in. I would propose 
that the links are only created via INSTALL file unless a corresponding 
/etc/sv/agetty-ttyX/down file is present. That is, if the TTY-directories 
in /etc/sv aren't completely overwritten at the next runit-void update, 
which I think they are...

Anyway, would this be a valid feature? Would someone other than me use it? 
:)

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Re: Default runit services

[Juan RP]

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True... and I agree, that's the correct way.

Will change this tomorrow, thanks.

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Re: Default runit services

[Logen Kain]

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Just wanted to say you're not the only one, I did this for power 
consumption on my R61 Laptop a while back, I noticed the issue of the extra 
tty comming back as well.  Suppose I should have asked about it then ^_^.

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Re: Default runit services

[Juan RP]

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The runit-void package (20150127) enables the default runit services at 
post-install time now.

This now only enables agetty for tty[1-4] in the default runlevel and 
sulogin for the single runlevel.

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Re: Default runit services

[Stefan Mühlinghaus]

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Great, thanks!

I have submitted a slight modification, so that only services are installed 
that are actually considered active at the moment.

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Re: Default runit services

[Juan RP]

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Applied, thanks!

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Re: Default runit services

[Stefan Mühlinghaus]

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I updated yesterday on my home PC without a problem, but just now I updated 
from 20150127_1 to 20150127_3 on another PC and had the problem, that the 
default services were removed but not reinstalled. I was missing the whole 
"single" runlevel and all TTYs from the "default" runlevel, effectively 
pulling the system from underneath my feet and leaving it unable to boot.

I assume this happened because the default links in /etc/runit/runsvdir are 
removed since they are no longer package content and the INSTALL file had 
no chance to create them because now all TTYs were immediately killed by 
their runsv-processes.

I do not think this will be a problem in any further updates, but right now 
I guess others could run into this too. Maybe the INSTALL file could 
install a helper-service pre-installation, that checks after a couple of 
seconds if there is at least one TTY running and if not install them as the 
post-install-process would do. After that it could remove itself. I can 
submit a pull request when I'm back home later today.

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Re: Default runit services

[Juan RP]

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What happened here is that the runit-void-20150127_1 update removed the 
files from /etc/runit/runsvdir/{default,single}
(agetty-ttyX) and the configuration of the package remade the symlinks.

But if for some reason xbps didn't complete the update fast enough to 
configure the runit-void package, most likely your
agetty process was killed and those packages in the transaction were not 
configured.

`xbps-query -l` will list packages in "uu" state if they need to be 
configured with `xbps-reconfigure -a`.

I believe this won't happen anymore, but it's a design feature of runit and 
xbps. Not sure what I can do about this...

HTH

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Re: Default runit services

[Stefan Mühlinghaus]

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Maybe something like this can prevent the worst case scenario:

In INSTALL pre:

[ -e /var/service/agetty-tty6 ] && sv stop /var/service/agetty-tty6
ln -sf /etc/sv/agetty-tty6 /var/service/rescue-tty6

In INSTALL post:

rm -f /var/service/rescue-tty6
[ -e /var/service/agetty-tty6 ] && sv up /var/service/agetty-tty6

That way, even if all standard TTYs are removed during install, there is at 
least the rescue TTY.

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