FD_CLR            620 lib/tty/key.c          FD_CLR (p->fd, select_set);
FD_CLR           1687 lib/tty/key.c                      FD_CLR (mouse_fd, &select_set);
FD_CLR           1934 lib/tty/key.c                          FD_CLR (mouse_fd, &select_set);
FD_CLR           2026 lib/tty/key.c                              FD_CLR (mouse_fd, &select_set);
FD_CLR           2038 lib/tty/key.c                          FD_CLR (mouse_fd, &select_set);