From a0f358d43f7ed0601dab4335ff84b5a884d1ecb7 Mon Sep 17 00:00:00 2001
From: Inqiyad Sabr <sabr@ariamath.xyz>
Date: Tue, 28 Oct 2025 15:29:20 +0600
Subject: Fixed sbc NULL arithmetic on set increase and decrease options

---
 README.md |  4 ++--
 sbc       | 60 ++++++++++++++++++++++++++++++++----------------------------
 2 files changed, 34 insertions(+), 30 deletions(-)

diff --git a/README.md b/README.md
index c78008e..8638503 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# brightnessctl
+# Simple Brightness Control
 A simple tool to increase decrease and set brightness, infact that's all it does ;-)
 
 # License
@@ -9,4 +9,4 @@ To install this you just need to put this script in one of your preferred `${PAT
 (or maybe I'll just add a `./install` file)
 
 # Usage
-See `brl -h` for more information.
+See `sbc -h` for more information.
diff --git a/sbc b/sbc
index e269c16..4f17d03 100755
--- a/sbc
+++ b/sbc
@@ -1,34 +1,38 @@
 #!/bin/sh
-# ====================================
-# Program : brl (brightness control)
+# ==================================
 # License : The Unlicense
 # Author  : sabr@ariamath.xyz
 # Version : 0.0.1
-# ====================================
+# ==================================
 # Honestly, brightnessctl is bloat.
-# ====================================
+# ==================================
 device="$(find /sys/class/backlight/*)"
-fmax="${device}/max_brightness"
-fnow="${device}/brightness"
-m="$(cat "${fmax}")"
-c="$(cat "${fnow}")"
-v=$2
-case "$1" in
-	"-s") printf "%d" $((v * m / 100)) > "${fnow}";;
-	"-i") printf "%d" $((c + v * m / 100)) > "${fnow}";;
-	"-d") printf "%d" $((c - v * m / 100)) > "${fnow}";;
-	"-v")
-		printf "brl v0.0.1\n"
-		printf "A simple brightness control program\n"
-	;;
-	"-h")
-		printf "brl [options] [value]\n"
-		printf " -s   set brightness %%\n"
-		printf " -i   increase brightness %%\n"
-		printf " -d   decrease brightness %%\n"
-	;;
-	*)
-		printf "Current brightness: %d%% (%d)\n"\
-			$((c * 100 / m)) "$c"
-	;;
-esac
+fmax="$device/max_brightness"
+fnow="$device/brightness"
+m="$(cat "$fmax")"
+c="$(cat "$fnow")"
+if [ $# -gt 1 ];
+then
+	case "$1" in
+		"-s") printf "%d" $(($2 * m / 100)) > "$fnow";;
+		"-i") printf "%d" $((c + $2 * m / 100)) > "$fnow";;
+		"-d") printf "%d" $((c - $2 * m / 100)) > "$fnow";;
+	esac
+else
+	case "$1" in
+		"-v")
+			printf "brl v0.0.1\n"
+			printf "A simple brightness control program\n"
+		;;
+		"-h")
+			printf "brl [options] [value]\n"
+			printf " -s   set brightness %%\n"
+			printf " -i   increase brightness %%\n"
+			printf " -d   decrease brightness %%\n"
+		;;
+		*)
+			printf "Current brightness: %d%% (%d)\n"\
+				$((c * 100 / m)) "$c"
+		;;
+	esac
+fi
-- 
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