#!/bin/sh BRIGHTNESS_FILE=/etc/current_brightness BRIGHTNESS_DEFAULT_VALUE=100 # Check args if [ ${#} -ne 0 ]; then echo "Usage: $(basename ${0})" exit 1 fi # Sanity check: File does not exist if [ ! -f ${BRIGHTNESS_FILE} ]; then echo ${BRIGHTNESS_DEFAULT_VALUE} > ${BRIGHTNESS_FILE} fi # Sanity check: Check if integer brightness=$(cat ${BRIGHTNESS_FILE}) if ! [ ! "${brightness}" -ne "${brightness}" ] 2> /dev/null; then echo ${BRIGHTNESS_DEFAULT_VALUE} > ${BRIGHTNESS_FILE} brightness=${BRIGHTNESS_DEFAULT_VALUE} fi echo ${brightness} exit 0