commit 2fdc371

rewrite bri. thanks wael

 1@@ -1,33 +1,11 @@
 2 #!/bin/sh -e
 3-
 4 # A simple script to change screen brightness.
 5 
 6-# Path to brightness file, which holds value of current brightness
 7-# This path may be different across systems, change it accordingly
 8-# You will also need read/write access to this file.
 9-# Permissions on this file does however not persist across reboots, so a boot 
10-# hook is neccessary to set appropriate permissions upon boot.
11-BRI_FILE='/sys/class/backlight/amdgpu_bl0/brightness'
12-CURR_BRI=$(cat "$BRI_FILE")
13-
14-increase () {
15-    echo "$CURR_BRI" + 10 | bc > NEW_BRI
16-    cat NEW_BRI > "$BRI_FILE"
17-    rm -r NEW_BRI
18-}
19-
20-decrease () {
21-    echo "$CURR_BRI" - 10 | bc > NEW_BRI
22-    cat NEW_BRI > "$BRI_FILE"
23-    rm -r NEW_BRI
24-}
25-
26-help () {
27-    printf "Useage:\n\nUse 'd' or 'i' to decrease or increase screen brightness"
28-}
29+file='/sys/class/backlight/amdgpu_bl0/brightness'
30+read -r brightness < "$file"
31 
32 case $1 in
33-    i) increase  ;;
34-    d) decrease  ;;
35-    *) help ;;
36+    d) printf "%s\n" "$((brightness - 5))" > "$file" ;;
37+    i) printf "%s\n" "$((brightness + 5))" > "$file" ;;
38+    *) printf "%s\n" "usage: ${0##*/} d|i" ;;
39 esac