Linux On My Samsung

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#!/bin/sh


# adjust backlight via setpci and dpms via vbetool


# Check if root called this script
USER=`whoami`
if [ $USER != "root" ]; then
   echo "Need to be root to run this script."
   exit 1
fi

# Get old value
OLD2=`setpci -s 00:02.0 F4.B`

OLD=0x$OLD2

case "$1" in
   inc)
        # Check if value given for increase
      if [ -z "$2" ]; then
         echo "Usage: $0 $1 <value>"
         exit 1
      fi

      # Take second argument as value to increment
      NEW=$(( $OLD + $2 ))

      # Set new value
      $0 set $NEW
   ;;

   dec)
        # Check if value given for decrease
      if [ -z "$2" ]; then
         echo "Usage: $0 $1 <value>"
         exit 1
      fi
      
      # Take second argument as value to decrement
      NEW=$(( $OLD - $2 ))

      # Set new value
      $0 set $NEW
   ;;

   set)
      # Check if value given
      if [ -z "$2" ]; then
         echo "Usage: $0 $1 <value>"
         exit 1
      fi
      
      # Take second argument as value to set
      NEW=$2

      # Check if value less than 0
      if [ "$NEW" -lt "0" ]; then
         NEW=0
      fi

      # Check if value greater than 255
      if [ "$NEW" -gt "255" ]; then
         NEW=255
      fi
   
      # Set new value
      setpci -s 00:02.0 F4.B=`echo "obase=16; ibase=10; $NEW" | bc`
   ;;

   toggle)
      # Path to logfile
      LOG=/tmp/backlight.log

      # Check if logfile does not exist
           if [ ! -f $LOG ]; then
         vbetool dpms off
         touch $LOG
      else
         vbetool dpms on
         rm -rf $LOG
      fi
   ;;

   *)
      echo "Usage: $0 (inc <value>|dec <value>|set <value>|toggle)"
      echo "Current Value: $OLD2"
      exit 1
   ;;
esac

exit 0

Code: Select all

gksudo ./myscript.sh

Code: Select all

gksudo ./myscript.sh set XX
gksudo ./myscript.sh inc XX
gksudo ./myscript.sh dec XX