#!/bin/bash


BATTERY="battery"

RUNLEVEL_CURRENT="$(</var/lib/init.d/softlevel)"
RUNLEVEL_AC="${RUNLEVEL_CURRENT%%_$BATTERY}"
RUNLEVEL_BATTERY="${RUNLEVEL_AC}_${BATTERY}"


if on_ac_power; then

    if [[ "${RUNLEVEL_CURRENT}" = "${RUNLEVEL_BATTERY}" ]]; then

        if [ ! -d "/etc/runlevels/${RUNLEVEL_AC}" ]; then
            logger "${0}: no runlevel ${RUNLEVEL_AC}. Aborting."
            exit 1
        fi

        logger "Switching to ${RUNLEVEL_AC}."
        /sbin/rc ${RUNLEVEL_AC}

    fi

else

    if [[ "${RUNLEVEL_CURRENT}" != "${RUNLEVEL_BATTERY}" ]]; then

        if [ ! -d "/etc/runlevels/${RUNLEVEL_BATTERY}" ]; then
            logger "${0}: no runlevel ${RUNLEVEL_BATTERY}. Aborting."
            exit 1
        fi

	logger "Switching to ${RUNLEVEL_BATTERY}."
        /sbin/rc ${RUNLEVEL_BATTERY}

    fi

fi