From 7d0c54c7cd0f710fe5d1d3510819f352ec486c23 Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <m@m-chrzan.xyz>
Date: Sun, 26 Mar 2023 14:01:53 +0200
Subject: Add backlight script

---
 backlight | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 backlight

(limited to 'backlight')

diff --git a/backlight b/backlight
new file mode 100755
index 0000000..2d5e0e2
--- /dev/null
+++ b/backlight
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Allows you to adjust display backlight from the command line.
+# USAGE: backlight <brightness change>
+# The brightness change can be positive (for brighter) or negative (for darker).
+# NOTE: requires root privileges.
+
+brightness=`cat /sys/class/backlight/intel_backlight/brightness`
+delta="$1"
+
+if [[ ! $delta =~ ^-?[0-9]+$ ]]; then
+    echo "Not a number!"
+    exit 1
+fi
+
+new_brightness=$((brightness + delta))
+
+
+if [[ new_brightness -gt 7500 ]]; then
+    new_brightness=7500
+elif [[ new_brightness -lt 0 ]]; then
+    new_brightness=0
+fi
+
+# echo $new_brightness
+tee /sys/class/backlight/intel_backlight/brightness <<< "$new_brightness"
-- 
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