[education/rkward] rkward/rbackend: Another debug check

[Thomas Friedrichsmeier]

Git commit e4a2aa8497bd36893558f67ef279f8abffd868c4 by Thomas Friedrichsmeier.
Committed on 30/07/2022 at 15:46.
Pushed by tfry into branch 'master'.

Another debug check

M  +3    -2    rkward/rbackend/rkbackendtransmitter.cpp

https://invent.kde.org/education/rkward/commit/e4a2aa8497bd36893558f67ef279f8abffd868c4

diff --git a/rkward/rbackend/rkbackendtransmitter.cpp b/rkward/rbackend/rkbackendtransmitter.cpp
index f73f15ba..1dfd02e7 100644
--- a/rkward/rbackend/rkbackendtransmitter.cpp
+++ b/rkward/rbackend/rkbackendtransmitter.cpp
@@ -62,8 +62,9 @@ void RKRBackendTransmitter::run () {
 	connection->write ("\n");
 	connection->write (RKWARD_VERSION);
 	connection->write ("\n");
-	connection->waitForBytesWritten ();
-	RK_DEBUG(RBACKEND, DL_DEBUG, "Sending handshake complete");
+	bool ok = connection->waitForBytesWritten ();
+	RK_DEBUG(RBACKEND, DL_DEBUG, "Sending handshake complete, status: %s", ok ? "ok" : "fail");
+	if (!ok) handleTransmissionError("Could not write connection handshake: " + connection->errorString());
 
 	flushtimerid = startTimer (200);	// calls flushOutput(false), periodically. See timerEvent()