php_signal        876 ext/pcntl/pcntl.c 		if (php_signal(signo, (Sigfunc *) Z_LVAL_P(handle), (int) restart_syscalls) == SIG_ERR) {
php_signal         33 ext/pcntl/php_signal.h Sigfunc *php_signal(int signo, Sigfunc *func, int restart);