while( input == 0 ) {
	fcntl(0, F_SETFL, flags | O_NONBLOCK);
        ioctl(0, TCGETA, &savetty);
        ioctl(0, TCGETA, &settty);
        settty.c_lflag &= ~ICANON;
        settty.c_lflag &= ~ECHO;
        ioctl(0, TCSETAF, &settty);
	ch = getc(stdin); 
	switch(ch) {