first Version

backup/eww/scripts/brightness.sh

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+#!/bin/bash
+
+brightness_file="/sys/class/backlight/intel_backlight/brightness"
+min_brightness=1
+max_brightness=96000
+
+# Check if an argument is provided
+if [[ -z $1 ]]; then
+  echo "Error: Number argument is missing."
+  exit 1
+fi
+
+# Retrieve the argument value
+number_to_add=$1
+
+# Validate if the argument is a number
+if ! [[ $number_to_add =~ ^-?[0-9]+$ ]]; then
+  echo "Error: Invalid number argument."
+  exit 1
+fi
+
+# Read the current brightness value from the file
+current_brightness=$(cat "$brightness_file")
+
+# Add the desired number to the current brightness
+new_brightness=$((current_brightness + number_to_add))
+
+# Enforce minimum and maximum brightness values
+if (( new_brightness < min_brightness )); then
+  new_brightness=$min_brightness
+elif (( new_brightness > max_brightness )); then
+  new_brightness=$max_brightness
+fi
+
+# Write the new brightness value back to the file
+echo "$new_brightness" >> "$brightness_file"
+
+eww update brightnessValue="$new_brightness"