powerstate_cron

#!/bin/bash
_BAT_STATE=$((`acpitool | head -n 1 | gawk '{print $5}' | sed -e "s/[\.%,]//g"` / 100));
_BAT_STATUS=$(cat /proc/acpi/ac_adapter/AC/state | cut -b26-);
echo "$_BAT_STATE";
while [ "$_BAT_STATUS" = "off-line" ];
        do
                if [[ "$_BAT_STATE" -gt 7 && "$_BAT_STATE" -le 100 ]];
                        then
                                exit;
                elif [ "$_BAT_STATE" -le 4 ];
                        then
                                shutdown -t 5 -h;
                                exit;
                else
                        xmessage -timeout 10 -center "Low power detected! Child will be powered off shortly. Please, plug in AC adapter.";
                        sleep 50;
                        _BAT_STATUS=$(cat /proc/acpi/ac_adapter/AC/state | cut -b26-);
                        if [ "$_BAT_STATUS" = "off-line" ];
                                then
                                        shutdown -h now;
                        else
                                exit;
                        fi

                        exit;
                fi
        done