s)
0
2))))
+
+;; Check whether RUN-PROGRAM puts its child process into the foreground
+;; when stdin is inherited. If it fails to do so we will receive a SIGTTIN.
+;;
+;; We can't check for the signal itself since run-program.c resets the
+;; forked process' signal mask to defaults. But the default is `stop'
+;; of which we can be notified asynchronously by providing a status hook.
+(with-test (:name (:run-program :inherit-stdin))
+ (let (stopped)
+ (flet ((status-hook (proc)
+ (case (sb-ext:process-status proc)
+ (:stopped (setf stopped t)))))
+ (let ((proc (sb-ext:run-program "/bin/ed" nil :search nil :wait nil
+ :input t :output t
+ :status-hook #'status-hook)))
+ ;; Give the program a generous time to generate the SIGTTIN.
+ ;; If it hasn't done so after that time we can consider it
+ ;; to be working (i.e. waiting for input without generating SIGTTIN).
+ (sleep 0.5)
+ ;; either way we have to signal it to terminate
+ (process-kill proc sb-posix:sigterm)
+ (process-close proc)
+ (assert (not stopped))))))
+