Catch-all logger stops catching logs, and is not restarted after SIGKILL

From: Casper Ti. Vector <>
Date: Mon, 15 Aug 2016 23:39:48 +0800

On an Alpine Linux system managed using s6 ( / s6-rc (
with a fairly complex service set, if the following commands
  # echo _at_@ > /run/service/s6-svscan-log/fifo
  # tail /run/uncaught-logs/current
are inserted before `s6-rc -u change blahblah' in the stage2 script, a
corresponding line gets printed; however, after the s6-rc invocation,
the same commands do not result in corresponding test line being

After the system is fully up (after the s6-rc invocation, so
above-mentioned test fails), the following commands
  # s6-svc -k /run/service/s6-svscan-log
  # s6-svstat /run/service/s6-svscan-log
> down (SIGKILL) 0 seconds, normally up, want up, ready 0 seconds

After the SIGKILL, if the following command
  # s6-svc -u /run/service/s6-svscan-log
is run, then the catch-all logger accepts logs again, and auto-restart
of that service also works again.

Please feel free to ask for more information when necessary.

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Received on Mon Aug 15 2016 - 15:39:48 UTC

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