FD_CLR            621 lib/tty/key.c          FD_CLR (p->fd, select_set);
FD_CLR           1706 lib/tty/key.c                      FD_CLR (mouse_fd, &select_set);
FD_CLR           1967 lib/tty/key.c                          FD_CLR (mouse_fd, &select_set);
FD_CLR           2059 lib/tty/key.c                              FD_CLR (mouse_fd, &select_set);
FD_CLR           2071 lib/tty/key.c                          FD_CLR (mouse_fd, &select_set);