Programming

while (notdone) {

		//Set the timers
		waitd.tv_sec = 5;
		waitd.tv_usec = 0;

		FD_ZERO(&tempreadfds);
		FD_ZERO(&tempwritefds);

		FD_ZERO(&readfds);          /* initialize the read fd set */
		FD_ZERO(&writefds);			/* initialize the write fd set */

		FD_SET(parentfd, &readfds); /* add listener socket fd */
		FD_SET(0, &readfds);        /* add stdin fd (0) */


		tempreadfds = readfds; //make a copy
		tempwritefds = writefds; //make a copy

		rv = select(fdmax+1, &tempreadfds, &tempwritefds, (fd_set*) 0, &waitd);
		if (rv < 0) {
			error("ERROR in select");
		} else if(rv == 0) {
			printf("Timeout occurred! No data after 5 seconds\n");
		}
  
                printf("Select called\n");
		fflush(stdout);
}