+++ /dev/null
-#! /bin/sh
-
-set -e
-
-fun="$1"
-screen_brightness_device_path="/sys/class/backlight/intel_backlight"
-
-# Padding with space because when fun="=10", awk fails to parse fun==10
-new=$(
- awk -v fun=" $fun" '
- FILENAME ~ "/max_brightness$" {max = $1; next}
- FILENAME ~ "/brightness$" {cur = $1; next}
-
- END {
- unit = max / 100
- oper = substr(fun, 2, 1)
- units = substr(fun, 3, length(fun) - 1)
- if (oper == "=") {new = unit * units} else
- if (oper == "+") {new = cur + (unit * units)} else
- if (oper == "-") {new = cur - (unit * units)} else {
- printf("Unrecognized operator: %s\n", oper) > "/dev/stderr"
- exit(1)
- }
- print int(new)
- }
- ' \
- "$screen_brightness_device_path/max_brightness" \
- "$screen_brightness_device_path/brightness"
-)
-
-echo "${new}" | tee "${screen_brightness_device_path}/brightness"