static void call_sigprocmask(int how, sigset_t* new_set, sigset_t* old_set);
static void atexit_handler(void);
static void call_hooks(int sig_nr);
static void call_sigprocmask(int how, sigset_t* new_set, sigset_t* old_set);
static void atexit_handler(void);
static void call_hooks(int sig_nr);