int unit_prepare_exec(Unit *u);
-int unit_warn_leftover_processes(Unit *u);
+int unit_log_leftover_process_start(pid_t pid, int sig, void *userdata);
+int unit_log_leftover_process_stop(pid_t pid, int sig, void *userdata);
+int unit_warn_leftover_processes(Unit *u, cg_kill_log_func_t log_func);
bool unit_needs_console(Unit *u);