brightnes

#!/bin/sh
# I have brightness bug with sony vaio, so I have to set my
# brightness manually.
# To run this script without root
# edit your /etc/sudoers file with visudo
# and add this line:
# username ALL=(ALL) NOPASSWD: /usr/bin/tee /sys/class/backlight/nv_backlight/brightness
# change username with your username
# brightness + : brightness up
# brightness - : brightness down
# bind this script to XF86MonBrightnessUp and XF86MonBrightnessDown
read=$(cat /sys/class/backlight/nv_backlight/brightness)
max=$(cat /sys/class/backlight/nv_backlight/max_brightness)
path='/sys/class/backlight/nv_backlight/brightness'

if test "$read" -ge 0 && test "$read" -le 100; then
  case $1 in
    +)
      newlevel=$(($read + 5))
      if test "$newlevel" -ge 0 && test "$newlevel" -le 100; then
        echo "$newlevel" | sudo tee "$path"
        notify-send "Brightness:  $newlevel / $max"
      else
        echo "Max level reached"
        notify-send "Brightness:  Max level"
      fi
    ;;
    -)
      newlevel=$(($read - 5))
      if test "$newlevel" -ge 0 && test "$newlevel" -le 100; then
        echo $newlevel | sudo tee $path
        notify-send "Brightness:  $newlevel / $max"
      else
        echo "Min level reached"
        notify-send "Brightness:  Min level"
      fi
    ;;
    *)
      echo "put + or - as argument"
    ;;
    esac
fi