volatile static int children_waiting;
volatile static int msg_q_timeout;
-LIST_HEAD(msg_list);
-LIST_HEAD(exec_list);
-LIST_HEAD(running_list);
+static LIST_HEAD(msg_list);
+static LIST_HEAD(exec_list);
+static LIST_HEAD(running_list);
static void exec_queue_manager(void);
static void msg_queue_manager(void);