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-rw-r--r--gnu/build/marionette.scm27
1 files changed, 27 insertions, 0 deletions
diff --git a/gnu/build/marionette.scm b/gnu/build/marionette.scm
index 173a67cef9..bb018fc9c1 100644
--- a/gnu/build/marionette.scm
+++ b/gnu/build/marionette.scm
@@ -26,6 +26,7 @@
make-marionette
marionette-eval
wait-for-file
+ wait-for-tcp-port
marionette-control
marionette-screen-text
wait-for-screen-text
@@ -187,6 +188,32 @@ FILE has not shown up after TIMEOUT seconds, raise an error."
('failure
(error "file didn't show up" file))))
+(define* (wait-for-tcp-port port marionette
+ #:key (timeout 20))
+ "Wait for up to TIMEOUT seconds for PORT to accept connections in
+MARIONETTE. Raise an error on failure."
+ ;; Note: The 'connect' loop has to run within the guest because, when we
+ ;; forward ports to the host, connecting to the host never raises
+ ;; ECONNREFUSED.
+ (match (marionette-eval
+ `(begin
+ (let ((sock (socket PF_INET SOCK_STREAM 0)))
+ (let loop ((i 0))
+ (catch 'system-error
+ (lambda ()
+ (connect sock AF_INET INADDR_LOOPBACK ,port)
+ 'success)
+ (lambda args
+ (if (< i ,timeout)
+ (begin
+ (sleep 1)
+ (loop (+ 1 i)))
+ 'failure))))))
+ marionette)
+ ('success #t)
+ ('failure
+ (error "nobody's listening on port" port))))
+
(define (marionette-control command marionette)
"Run COMMAND in the QEMU monitor of MARIONETTE. COMMAND is a string such as
\"sendkey ctrl-alt-f1\" or \"screendump foo.ppm\" (info \"(qemu-doc)