Updated logging function and added LOG_TOPIC environment variable

savesync-logger[start](permanent).ash

@@ -5,10 +5,19 @@
 
 touch "$LOG_FILE"
 
-mosquitto_pub -h 127.0.0.1 -p 1883 -t "$TOPIC" "SaveLogStart=1"
-mosquitto_sub -h 127.0.0.1 -p 1883 -q 0 -t "$TOPIC" | while IFS="=" read -r key value
+
+log_to_file() {
+    printf "%s\n" "$1" >> "$LOG_FILE"
+}
+
+# Subscribe and wait for log entries
+mosquitto_sub -h 127.0.0.1 -t "$LOG_TOPIC" | while read -r line
 do
-	case "$key" in
-		"SaveLog") printf "%s\n" "$value" >>"$LOG_FILE"  ;;
-	esac
+    # The line will look like: SaveLog=[2026-...] [INFO] ...
+    # We strip the "SaveLog=" prefix
+    msg_content="${line#SaveLog=}"
+    
+    if [ -n "$msg_content" ]; then
+        log_to_file "$msg_content"
+    fi
 done