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bin/brightness.sh

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2017-01-15 09:07:26 +00:00
#!/usr/bin/env bash
increment=10
backlight_prefix=/sys/class/backlight/intel_backlight/
echo $1
if [[ "$1" = "decrease" ]]; then
echo decreasing
increment=$(expr -${increment})
fi
cur_brightness=$(cat ${backlight_prefix}brightness)
max_brightness=$(cat ${backlight_prefix}max_brightness)
new_brightness=$(expr ${cur_brightness} + ${increment})
# Permissions changes on brightness:
## change group to sbrl
## add g+w
# Old command:
#gksudo -- bash -c "echo ${new_brightness} >${backlight_prefix}brightness"
echo ${new_brightness} >${backlight_prefix}brightness
####################
### Notification ###
####################
### uncomment the following line to disable the notification
#exit
# Calculate the percentage
new_percent=$(echo "(${new_brightness} / ${max_brightness}) * 100" | bc -l)
new_percent=$(printf "%.1f" "${new_percent}")
echo new_percent: $new_percent
max_bar_length=100
bar_length=$(echo "(${new_percent} / 100) * ${max_bar_length}" | bc -l)
bar_length=$(printf "%.0f" "${bar_length}")
n_bar=$(head -c $bar_length < /dev/zero | tr '\0' '=')
# Kill the previous notification
killall notify-osd
notify-send "Brightness: ${new_percent}%" "${n_bar} (${new_brightness})"
#notify-send "Brightness" "${new_percent}%"