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#!/bin/bash
# A script to manage screen and keyboard brightness on my machine
# Depends on: bash, brightnessctl
# By David Penkowoj, 2021/06/24
# MTR_DEVICE="$MTR_DEVICE"
MTR_DEVICE="intel_backlight"
KBD_DEVICE="smc::kbd_backlight"
MTR_VALUE=49
KBD_VALUE=
SWITCH="$1"
case $SWITCH in
"help")
printf "Possible arguments:\n"
printf "===================\n"
printf "load - loads brightness from save\n"
printf "save - saves current brightness\n"
printf "up - increases brightness by 5 percent and saves\n"
printf "down - decreases brightness by 5 percent and saves\n"
printf "smallup - increases brightness by 1 percent and saves\n"
printf "smalldown - decreases brightness by 1 percent and saves\n"
printf "status - show brightness of a device"
;;
"load")
brightnessctl --device="$MTR_DEVICE" set "$MTR_VALUE%"
brightnessctl --device="$KBD_DEVICE" set 0 # "$KBD_VALUE%"
;;
"save")
M="$(brightnessctl --device="$MTR_DEVICE" | grep -Eo "[0-9]+" | head -n 2 | tail -n 1)"
K="$(brightnessctl --device="$KBD_DEVICE" | grep -Eo "[0-9]+" | head -n 2 | tail -n 1)"
sed -i "s/MTR_VALUE=49$MTR_VALUE/MTR_VALUE=49$M/g" "$0"
sed -i "s/KBD_VALUE=$KBD_VALUE/KBD_VALUE=$K/g" "$0"
;;
"smalldown")
if [[ "$2" = "monitor" ]]; then brightnessctl --device="$MTR_DEVICE" set 1-%; fi
if [[ "$2" = "keyboard" ]]; then brightnessctl --device="$KBD_DEVICE" set 1-%; fi
brightness save
notify-send -u low -r "110" "$2: $(brightness get monitor)"
;;
"smallup")
if [[ "$2" = "monitor" ]]; then brightnessctl --device="$MTR_DEVICE" set +1%; fi
if [[ "$2" = "keyboard" ]]; then brightnessctl --device="$KBD_DEVICE" set +1%; fi
brightness save
notify-send -u low -r "110" "$2: $(brightness get monitor)"
;;
"down")
if [[ "$2" = "monitor" ]]; then brightnessctl --device="$MTR_DEVICE" set 5-%; fi
if [[ "$2" = "keyboard" ]]; then brightnessctl --device="$KBD_DEVICE" set 5-%; fi
brightness save
notify-send -u low -r "110" "$2: $(brightness get monitor)"
;;
"up")
if [[ "$2" = "monitor" ]]; then brightnessctl --device="$MTR_DEVICE" set +5%; fi
if [[ "$2" = "keyboard" ]]; then brightnessctl --device="$KBD_DEVICE" set +5%; fi
brightness save
notify-send -u low -r "110" "$2: $(brightness get monitor)"
;;
"get")
M="$(brightnessctl --device="$MTR_DEVICE" | grep -Eo "[0-9]+" | head -n 2 | tail -n 1)"
K="$(brightnessctl --device="$KBD_DEVICE" | grep -Eo "[0-9]+" | head -n 2 | tail -n 1)"
if [[ "$2" = "monitor" ]]; then echo "$M%"; fi
if [[ "$2" = "keyboard" ]]; then echo "$K%"; fi
;;
*)
printf "Monitor:\n"
brightnessctl --device="$MTR_DEVICE" | tail -n 3 | sed 's/\t/- /g'
printf "Keyboard:\n"
brightnessctl --device="$KBD_DEVICE" | tail -n 3 | sed 's/\t/- /g'
;;
esac
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