also, when supervise targets (dirs) were moved from /var into
/run the runit package never did a cleanup of /var.
We should attempt a clean up on upgrade (postinst) of the following:
/var/lib/supervise/*
/var/lib/runit/supervise/*
but make sure to check that there is no runsv process still using the
directory before removing it, for example
for supervise in /var/lib/supervise/* /var/lib/runit/supervise/* ; do
#should not list as removable if there is a service active on this
supervise dir
if which chpst > /dev/null ; then
if chpst -L "$supervise"/lock true 2>/dev/null ; then
echo "$supervise"
else
continue #supervise is used by a runsv process, can't
be removed
fi
elif which flock >/dev/null ; then # fallback on flock
if flock -F -n "$supervise"/lock true ; then
echo "$supervise"
else
continue
fi
else #wtf, Hurd port? without runit installed
echo "unreliable: $supervise"
fi
done
and the top dir itself ( /var/lib/supervise, var/lib/runit/supervise )
can't be removed because there could be some service that still uses it
even if temporary disabled, so this requires a NEWS entry
