FD_CLR
FD_CLR(s, &real_readset);
FD_CLR(errsock, &real_readset);
FD_CLR(STDIN_FILENO, &real_readset);
FD_CLR(from0, &real_readset);
FD_CLR(from1, &real_readset);
FD_CLR(from2, &real_readset);
FD_CLR(net, &xbits);
FD_CLR(net, &ibits);
FD_CLR(tin, &ibits);
FD_CLR(net, &obits);
FD_CLR(tout, &obits);
FD_CLR(fd, &selstate->rfds);
FD_CLR(fd, &selstate->wfds);
FD_CLR(fd, &selstate->xfds);
FD_CLR(fd, &selstate->wfds);
FD_CLR(fd, &selstate->rfds);
FD_CLR(sock, &svc_fdset);
FD_CLR (handle, (fd_set *)vec_wi);
FD_CLR (handle, (fd_set *)vec_ri);
FD_CLR(notify_pipe[0], readset);
FD_CLR(sock, &svc_fdset);
FD_CLR(p->fd, &svc_fdset);
FD_CLR(__idx, &__stack.__buf);
FD_CLR(__idx, &__stack.__buf);
FD_CLR(__idx, &__stack.__buf);
FD_CLR(__idx, __stack.__buf);
FD_CLR(__idx, __stack.__buf);
FD_CLR(__idx, __stack.__buf);
FD_CLR(fd, &srv->wfdset);
FD_CLR(s->intr, &s->srv->rfdset);
FD_CLR(s->intr, &s->srv->wfdset);
FD_CLR(s->ctrl, &s->srv->rfdset);
FD_CLR(s->ctrl, &s->srv->wfdset);
FD_CLR(s->vkbd, &s->srv->rfdset);
FD_CLR(s->ukbd, &s->srv->rfdset);
FD_CLR(fd, &srv->fdset);
FD_CLR(sep->se_fd, &allsock);
FD_CLR(dev->cs, r);
FD_CLR(dev->fd_out, w);
FD_CLR(dev->fd_out, e);
FD_CLR(i, rfds);
FD_CLR(i, wfds);
FD_CLR(i, efds);
FD_CLR(dev->cs, r);
FD_CLR(p->fd, r);
FD_CLR(p->fd, e);
FD_CLR(p->fd, w);
FD_CLR(READFD, &fdsr);
FD_CLR(READFD, &svc_fdset);
FD_CLR(READFD, &fdsr);
FD_CLR(READFD, &svc_fdset);
FD_CLR(resfd, &readfds);