if (0 < select (max+1, &fds, NULL, NULL, &tv)) {
for (i = 0; i < FD_SETSIZE; i++) {
if (FD_ISSET (i, &fds)) {
XtInputId id = td->ids[i];
if (0 < select (max+1, &fds, NULL, NULL, &tv)) {
for (i = 0; i < FD_SETSIZE; i++) {
if (FD_ISSET (i, &fds)) {
XtInputId id = td->ids[i];