
#include <stdio.h>
#include <signal.h>

int main (void)
{
	const sigset_t alarm_set;

	sigemptyset (&alarm_set);
	sigaddset (&alarm_set,SIGALRM);	
	
	sigprocmask (SIG_BLOCK,&alarm_set,NULL);

	sigprocmask (SIG_UNBLOCK,&alarm_set,NULL);

	return 0;
}
