Re: Preliminary version of s6-rc available

From: Colin Booth <>
Date: Sun, 12 Jul 2015 14:53:10 -0700

On Sat, Jul 11, 2015 at 10:59 PM, Laurent Bercot
<> wrote:
> So I decided to publish what's already there, so you can test it and
> give feedback while I'm working on the rest. You can compile service
> definition directories, look into the compiled database, and run the
> service manager. It works on my machines, all that's missing is the
> live update capability.
The requirement for the s6-rc-init live directory to not exist is
awkward if trying to go with the defaults on a distro system since
/run is mounted noexec. It's pretty easy to work around but then the
defaults are broken on distro systems.

It'd be nice if s6-rc-db contents printed a newline after the last
service for single-item bundles:
root_at_radon:/run/s6# s6-rc-db -l /run/s6/s6-rc/ contents 1
getty-5root_at_radon:/run/s6# s6-rc-db -l /run/s6/s6-rc/ contents 2
getty-6root_at_radon:/run/s6# s6-rc-db -l /run/s6/s6-rc/ contents 3
> Bug-reports more than welcome: they are in demand!
s6-rc -da list doesn't seem to work right. At least, it doesn't work
like I'd expect, which is to show all services that are down. Given
two longruns getty-5 and getty-6, with getty-5 up and getty-6 down,
I'd expect s6-rc -da list to show getty-6 (and s6-rc -ua list to only
show getty-5). Currently -da list and -ua list show the same thing:
root_at_radon:/run/s6# s6-rc -l /run/s6/s6-rc -da list
root_at_radon:/run/s6# s6-rc -l /run/s6/s6-rc -ua list

s6-svstat shows the correct status of the world:
root_at_radon:/run/s6# s6-svstat service/getty-5/
up (pid 8944) 301 seconds
root_at_radon:/run/s6# s6-svstat service/getty-6/
down (signal SIGTERM) 206 seconds

`s6-rc -ua change' also doesn't seem to do what I'd expect. `s6-rc -da
change' brings down all running services, `s6-rc -pda change' brings
down all running services and then starts all stopped services.
Following that logic I'd expect `s6-rc -ua change' to start all
stopped services, however it instead appears to do nothing. My guess
is that it's related to the issues with -a above and that -a is only
ever returning the things in the "up" group.

Not exactle a bug but the docs are wrong: the index page points to
s6-rc-upgrade when it should point to s6-rc-update.

> --
> Laurent

Lastly, I know you're working on it but s6-rc-update will be much
appreciated. Having to tear down the entire supervision tree, delete
the compiled and live directories, and then re-initialize everything
with s6-rc-init is awkward to say the least. Especially with the above
issues involving s6-rc-init and not being able to overwrite the
contents of directories if they exist.

That's everything I've found in an hour or two of messing around. I
haven't done anything with oneshots or larger dependency trees yet, so
far it's just been a few getty processes and some wrapper bundles.


"If the doors of perception were cleansed every thing would appear to
man as it is, infinite. For man has closed himself up, till he sees
all things thru' narrow chinks of his cavern."
  --  William Blake
Received on Sun Jul 12 2015 - 21:53:10 UTC

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