diff options
Diffstat (limited to 'bin/brightness')
| -rwxr-xr-x | bin/brightness | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/bin/brightness b/bin/brightness new file mode 100755 index 0000000..10bd198 --- /dev/null +++ b/bin/brightness @@ -0,0 +1,12 @@ +#!/bin/sh +set -eu + +BRIGHTNESS_DIFF="$1" + +HANDLER=/sys/class/backlight/"$BACKLIGHT_DEVICE" + +OLD_BRIGHTNESS="$(cat "$HANDLER"/brightness)" +MAX_BRIGHTNESS="$(cat "$HANDLER"/max_brightness)" +SUM=$((OLD_BRIGHTNESS + BRIGHTNESS_DIFF)) +NEW_BRIGHTNESS="$(clamp -- "$SUM" 0 "$MAX_BRIGHTNESS")" +echo "$NEW_BRIGHTNESS" > "$HANDLER"/brightness || sudo chmod 666 "$HANDLER"/brightness |