Close write channel of external processes

Prevents external process from waiting for user input.

Merge-request: 347
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Change-Id: Icfd3e39a83ba945ebf89c1cbb2157e2a1c9f4d89

src/libs/utils/synchronousprocess.cpp

@@ -373,6 +373,7 @@ SynchronousProcessResponse SynchronousProcess::run(const QString &binary,
     // event loop in that case.
     m_d->m_binary = binary;
     m_d->m_process.start(binary, args, QIODevice::ReadOnly);
+    m_d->m_process.closeWriteChannel();
     if (!m_d->m_startFailure) {
         m_d->m_timer.start();
         QApplication::setOverrideCursor(Qt::WaitCursor);

src/plugins/vcsbase/vcsbaseplugin.cpp

@@ -798,7 +798,8 @@ static Utils::SynchronousProcessResponse
         process->setProcessChannelMode(QProcess::MergedChannels);
 
     // Start
-    process->start(binary, arguments);
+    process->start(binary, arguments, QIODevice::ReadOnly);
+    process->closeWriteChannel();
     Utils::SynchronousProcessResponse response;
     if (!process->waitForStarted()) {
         response.result = Utils::SynchronousProcessResponse::StartFailed;