Pequeño script para bloquear la pantalla por Bluetooth

Un pequeño script en bash para bloquear la pantalla automáticamente cuando se aleje tu teléfono del ordenador, y se desbloquee cuando vuelvas

#!/bin/bash

#Change to your interface
INTERFACE=”00:00:00:00:00:00″

block=0

while true; do
hcitool cc ${INTERFACE} 2>>/dev/null

Signal=”`hcitool lq ${INTERFACE} 2>>/dev/null`”

#echo Signal: $Signal

if [ "0" = "0$Signal" ]; then
echo Desconectado
(( block ++ ))
#if fail at least two times
if [ $block -gt 1 ]; then
#sudo -u username gnome-screensaver-command –lock
dcop kdesktop KScreensaverIface lock
fi
else
if [ "${Signal##*: }" -gt 220 ]; then
echo “Conectado”
if [ $block -gt 0 ]; then
#sudo -u username gnome-screensaver-command –deactivate
dcop kdesktop KScreensaverIface quit
block=0
fi
sleep 5

else
echo “Baja señal”

(( block ++ ))
#if fail at least two times
if [ $block -gt 1 ]; then
#sudo -u username gnome-screensaver-command –lock
dcop kdesktop KScreensaverIface lock
fi
fi
fi

hcitool dc ${INTERFACE} 2>>/dev/null
sleep 1

done