fix: restore ioctl block in simple.lisp (was lost in edit)

src/backend/simple.lisp

@@ -40,9 +40,22 @@
                         (values a nil)))))))
         (when (and cols rows (> cols 0) (> rows 0))
           (values cols rows)))
+      ;; ioctl on stdout fd — fast, correct after SIGWINCH at runtime.
       (multiple-value-bind (cols rows)
-              (when (and rows cols (> rows 0) (> cols 0))
-                (values cols rows))))))
+          (ignore-errors
+            (let* ((+tiocgwinsz+ 21523)
+                   (winsize (sb-alien:make-alien sb-alien:unsigned-short 4)))
+              (unwind-protect
+                   (progn
+                     (sb-unix:unix-ioctl (sb-sys:fd-stream-fd
+                                          (backend-output-stream b))
+                                         +tiocgwinsz+
+                                         (sb-alien:alien-sap winsize))
+                     (values (sb-alien:deref winsize 1)
+                             (sb-alien:deref winsize 0)))
+                (sb-alien:free-alien winsize))))
+        (when (and cols rows (> cols 0) (> rows 0))
+          (values cols rows)))
       (ignore-errors
         (let ((tty-fd (sb-unix:unix-open "/dev/tty" 0 0)))  ; O_RDONLY
           (when (and tty-fd (numberp tty-fd) (> tty-fd 0))