rem: if (thread < B_OK) {
add: if (thread < FS_OK) {
context: do_tracker(int argc, char **argv){	static thread_id thread = -1;	if (thread < B_OK) {		puts("starting tracker...");		thread = spawn_thread(tracker_loop, "tracker", B_NORMAL_PRIORITY, NULL);		resume_thread(thread);	} else {		status_t status;		puts("stopping tracker.");		write_port(gTrackerPort, FSH_KILL_TRACKER, NULL, 0);		wait_for_thread(thread, &status);		thread = -1;	}	return 0;}