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 for (;;) {        fprintf(stdout, "PJMP Polling\n");    	i = poll(pfds, 1, POLL_TIMEOUT);        fprintf(stdout, "PJMP After Poll\n");    	if (i < 0 && errno == EINTR) {	    	continue;	    }	    if (i > 0 && (pfds[0].revents & POLLIN) != 0) {	    	do {	    		j = handle_command(&cf, pfds[0].fd);	    	} while (j == 0);	    }    }