SHUT_WR
if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
if (how == SHUT_WR || how == SHUT_RDWR)
shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);
shutdown(pfd[POLL_NETOUT].fd, SHUT_WR);