SIGIO             272 ext/pcntl/pcntl.c 	REGISTER_LONG_CONSTANT("SIGIO",    (zend_long) SIGIO, CONST_CS | CONST_PERSISTENT);
SIGIO             113 sapi/fpm/fpm/fpm_signals.c #ifdef SIGIO
SIGIO             114 sapi/fpm/fpm/fpm_signals.c 	[SIGIO] 		= "SIGIO",
SIGIO            1626 sapi/phpdbg/phpdbg.c 			sigaction(SIGIO, &sigio_struct, NULL);