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#!/bin/sh
# display-brightness.sh
# simple script to set display-brightness for zaurus clamshell
# author: patrick steiner <patrick.steiner@a1.net>
# version: 1.00 | 22.02.2005 23:20
STEP=5
DRIVER="`ls /sys/class/backlight/|head -n 1`"
MAX_BRIGHTNESS=`cat /sys/class/backlight/$DRIVER/max_brightness`
ACTUAL_BRIGHTNESS=`cat /sys/class/backlight/$DRIVER/actual_brightness`
BRIGHTNESS_FILE="/sys/class/backlight/$DRIVER/brightness"
if test "$1" != "up" -a "$1" != "down" -a -n "$1"
then
echo -e "\nUsage:\n\t `basename $0` [up | down]\n"
exit 0
fi
echo "max / current"
echo "$MAX_BRIGHTNESS / $ACTUAL_BRIGHTNESS"
if [ ! -n "$1" ]; then
exit 0
fi
if [ "$1" = "up" ]; then
if [ $ACTUAL_BRIGHTNESS -eq $MAX_BRIGHTNESS ]; then
exit 0
else
test "$STEP" -gt "$MAX_BRIGHTNESS" -o "$STEP" -eq "$MAX_BRIGHTNESS" && STEP=1
let CURRENT_BRIGHTNESS=$ACTUAL_BRIGHTNESS+$STEP
echo $CURRENT_BRIGHTNESS >> $BRIGHTNESS_FILE
exit 0
fi
fi
if [ "$1" = "down" ]; then
if [ $ACTUAL_BRIGHTNESS -eq 0 ]; then
exit 0
elif [ $ACTUAL_BRIGHTNESS -lt $STEP ]; then
STEP=1
let CURRENT_BRIGHTNESS=$ACTUAL_BRIGHTNESS-$STEP
echo $CURRENT_BRIGHTNESS >> $BRIGHTNESS_FILE
exit 0
else
let CURRENT_BRIGHTNESS=$ACTUAL_BRIGHTNESS-$STEP
echo $CURRENT_BRIGHTNESS >> $BRIGHTNESS_FILE
exit 0
fi
fi
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