void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, UnitNotifyFlags flags);
-int unit_watch_pid(Unit *u, pid_t pid);
+int unit_watch_pid(Unit *u, pid_t pid, bool exclusive);
void unit_unwatch_pid(Unit *u, pid_t pid);
void unit_unwatch_all_pids(Unit *u);