#!/bin/sh
# Copyright 2011 Canonical, Inc
#           2014 Tianon Gravi
# Author: Serge Hallyn <serge.hallyn@canonical.com>
#         Tianon Gravi <admwiggin@gmail.com>
set -e

# we don't care to move tasks around gratuitously - just umount the cgroups

# if we don't even have the directory we need, something else must be wrong
if [ ! -d /sys/fs/cgroup ]; then
	exit 0
fi

# if /sys/fs/cgroup is not mounted, we don't bother
if ! mountpoint -q /sys/fs/cgroup; then
	exit 0
fi

cd /sys/fs/cgroup

for sys in *; do
	if mountpoint -q $sys; then
		umount $sys
	fi
	if [ -d $sys ]; then
		rmdir $sys || true
	fi
done

exit 0