exit on overlong passed data

pin.run

@@ -30,6 +30,13 @@ if os.path.getsize(database) < 100 * 1024 * 1024:
     # only add entries if file size does not exceed 100 MiB
 
     if "ort" in args and "name" in args and "comment" in args:
+
+        # fail if input is too long
+        if max(map(len, list(args[i] for i in args))) > 200:
+            # overlong input is a clear indication someone is fiddling with the interface
+            # this deserves no proper exit message
+            exit()
+
         # add entry
         try:
             zeit = datetime.timestamp(datetime(int(args["year"]), int(args["month"]), int(args["day"]), int(args["hour"]), int(args["minute"])))