Implement privileged input daemon, first version without handlers.

1 files changed, 82 insertions, 0 deletions

diff --git a/src/input/privilegedHandlerForwarder.cpp b/src/input/privilegedHandlerForwarder.cpp
new file mode 100644
index 0000000..3c0b3bd
--- /dev/null
+++ b/src/input/privilegedHandlerForwarder.cpp
@@ -0,0 +1,82 @@
+/*
+ # Copyright (c) 2009 - OpenSLX Project, Computer Center University of Freiburg
+ #
+ # This program is free software distributed under the GPL version 2.
+ # See http://openslx.org/COPYING
+ #
+ # If you have any feedback please consult http://openslx.org/feedback and
+ # send your suggestions, praise, or complaints to feedback@openslx.org
+ #
+ # General information about OpenSLX can be found at http://openslx.org/
+ # --------------------------------------------------------------------------
+ # inputHandlerChain.cpp:
+ #  - Forward privileged input events to a special handler process - implementation
+ # --------------------------------------------------------------------------
+ */
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <cassert>
+#include <cerrno>
+#include <cstring>
+#include <string>
+#include <QSettings>
+#include <QtDebug>
+#include "pvsPrivInputSocket.h"
+#include "privilegedHandlerForwarder.h"
+
+using namespace std;
+
+#ifndef UNIX_PATH_MAX
+# define UNIX_PATH_MAX 108 /* according to unix(7) */
+#endif
+
+void PrivilegedHandlerForwarder::initialize()
+{
+	QSettings settings(QSettings::NativeFormat, QSettings::SystemScope, "openslx", "pvsinputd");
+
+	QString defaultPath = "/tmp/pvsprivinputd.sock";
+	QByteArray socketPath = settings.value("socketpath", defaultPath).toString().toLocal8Bit();
+
+	_socket = pvsPrivInputMakeClientSocket();
+	if(_socket < 0)
+	{
+		return;
+	}
+}
+
+void PrivilegedHandlerForwarder::handle(InputEvent const& evt, InputEventContext const*)
+{
+	qDebug("Trying to handle %s in PrivilegedHandlerForwarder", evt.toString().c_str());
+	if(_socket < 0)
+	{
+		initialize();
+	}
+
+	QByteArray data;
+	QDataStream strm(&data, QIODevice::WriteOnly);
+	strm.setByteOrder(QDataStream::BigEndian);
+	strm << evt;
+
+	assert(data.size() == 8);
+
+	int delta = 0;
+	int count = 0;
+	do {
+		delta = write(_socket, data.constData(), data.size());
+		if(delta < 0)
+		{
+			qWarning("Error while communicating with pvsprivinputd: %s", strerror(errno));
+			close(_socket);
+
+			// Try again:
+			initialize();
+		}
+		else if(delta != 8)
+		{
+			// This should normally not happen.
+			qWarning("Could not send a complete packet. Only %d bytes sent", delta);
+		}
+		count++;
+	} while(delta != 8 && count < 3);
+}