Programming

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

void handler(int sig) { }

int main( void )
{
        int state;
        sigset_t imask, omask;
        struct sigaction act, oact;
        sigemptyset(&imask);
        sigemptyset(&omask);
        sigaddset(&imask, SIGALRM);

        sigemptyset(&act.sa_mask);
        act.sa_handler = handler;
        act.sa_flags = 0;
        sigaction(SIGALRM, &act, &oact);

        initscr();
        clear();
        state=0;
        while(1) {
                if(state) {
                        mvprintw(10, 10, "The ALARM is going off now!\n" );
                } else {
                        mvprintw( 10, 10, "Snoozing now..zzzzzz\n");
                }
                refresh();
                sigprocmask(SIG_SETMASK, &imask, NULL);
                alarm(5);
                sigsuspend(&omask);
                state=!state;
        }
}