NAME select, pselect, FD_CLR, FD_ISSET, FD_SET, FD_ZERO, fd_set - synchronous ... struct timeval *_Nullable restrict timeout ); void FD_CLR(int fd , fd_set * set ); int FDNAME select, pselect, FD_CLR, FD_ISSET, FD_SET, FD_ZERO, fd_set - synchronous ... struct timeval *_Nullable restrict timeout ); void FD_CLR(int fd , fd_set * set ); int FDNAME select, pselect, FD_CLR, FD_ISSET, FD_SET, FD_ZERO, fd_set - synchronous ... struct timeval *_Nullable restrict timeout ); void FD_CLR(int fd , fd_set * set ); int FD