};
int para_signal_init(void);
-int para_install_sighandler(int);
-void para_reap_children(void);
+void para_sigaction(int sig, void (*handler)(int));
+void para_install_sighandler(int);
int para_reap_child(pid_t *pid);
int para_next_signal(void);
void para_signal_shutdown(void);