#!/bin/sh
set -exu

fatal () {
	echo "ERROR: $@" >&2
	exit 1
}

skip () {
	echo "ERROR: $@" >&2
	exit 77
}

htc_enabled () {
	if ls /etc/rc[2345].d/S*apache-htcacheclean > /dev/null 2>&1 ; then
		return 0
	else
		return 1
	fi
}

if htc_enabled ; then
	fatal "apache-htcacheclean should not be enabled"
fi

a2enmod cache_disk

if ! htc_enabled ; then
	fatal "apache-htcacheclean should be enabled"
fi

service apache-htcacheclean start

# for debugging
ps -ef|grep /usr/bin/htcacheclean || true

PGREP="pgrep -P 1 -u www-data -G www-data htcacheclean"

if ! $PGREP ; then
	fatal "htcacheclean is not running or running as wrong user/group"
fi

if ! service apache-htcacheclean status ; then
	fatal "status did not return 'running'"
fi

service apache-htcacheclean stop
sleep 1

if $PGREP ; then
	skip "htcacheclean did not stop"
fi

if service apache-htcacheclean status ; then
	fatal "status did not return 'stopped'"
fi

a2dismod cache_disk

if htc_enabled ; then
	fatal "apache-htcacheclean should not be enabled"
fi

a2enmod cache_socache

if htc_enabled ; then
	fatal "apache-htcacheclean has been enabled for cache_socache"
fi

exit 0