backlight

1 files changed, 26 insertions, 0 deletions

diff --git a/home/xyz/.local/bin/backlight b/home/xyz/.local/bin/backlight
new file mode 100755
index 00000000..b148b90c
--- /dev/null
+++ b/home/xyz/.local/bin/backlight
@@ -0,0 +1,26 @@
+#!/bin/sh
+# adjust backlight
+
+brightness=$(cat /sys/class/backlight/intel_backlight/brightness)
+max_brightness=$(cat /sys/class/backlight/intel_backlight/max_brightness)
+step=$((max_brightness/20))
+
+while getopts ud opt; do
+	case $opt in
+		u)
+			case "$brightness" in
+				0) echo 1;;
+				1) echo "$step";;
+				*) echo "$((brightness+step))";;
+			esac
+		;;
+		d) 
+			case "$brightness" in
+				1) echo 0;;
+				"$step") echo 1;;
+				*) echo "$((brightness-step))";;
+			esac
+		;;
+		\?) exit 1;;
+	esac
+done | sudo tee /sys/class/backlight/intel_backlight/brightness > /dev/null