sigfillset - initialize and fill signal set

Syntax	#include <signal.h> int sigfillset(sigset_t *set);
Description	sigfillset() initializes the signal set pointed to by set in a manner that includes all the signals defined in the system.
Return val.	0 -1	if successful. if an error occurs. errno is set to indicate the error.
Errors	sigfillset() will fail if: Extension EFAULT     set specifies an invalid address. (End)
Notes	Applications should call sigemptyset() or sigfillset() for each object of type sigset_t prior to any other use of that object. If such an object is not initialized in this way, but is nonetheless supplied as an argument to any of sigaction(), sigaddset(), sigdelset(), sigismember(), sigpending() or sigprocmask(), the behavior is undefined.
See also	sigdelset(), sigemptyset(), sigfillset(), sigismember(), signal.h.