Noux: use Terminal::Connection as singleton

We will reuse the terminal connection in the stdio filesystem
to implement /dev/tty. Therefor we need to access the terminal
from different locations which is simplified if it is provided
by a singleton.

ports/src/noux/main.cc

@@ -807,6 +807,13 @@ Noux::Io_receptor_registry * Noux::io_receptor_registry()
 }
 
 
+Terminal::Connection *Noux::terminal()
+{
+	static Terminal::Connection _inst;
+	return &_inst;
+}
+
+
 void *operator new (Genode::size_t size) {
 	return Genode::env()->heap()->alloc(size); }
 
@@ -869,17 +876,15 @@ int main(int argc, char **argv)
 	                             resources_ep,
 	                             false);
 
-	static Terminal::Connection terminal;
-
 	/*
 	 * I/O channels must be dynamically allocated to handle cases where the
 	 * init program closes one of these.
 	 */
 	typedef Terminal_io_channel Tio; /* just a local abbreviation */
 	Shared_pointer<Io_channel>
-		channel_0(new Tio(terminal, Tio::STDIN,  sig_rec), Genode::env()->heap()),
-		channel_1(new Tio(terminal, Tio::STDOUT, sig_rec), Genode::env()->heap()),
-		channel_2(new Tio(terminal, Tio::STDERR, sig_rec), Genode::env()->heap());
+		channel_0(new Tio(*Noux::terminal(), Tio::STDIN,  sig_rec), Genode::env()->heap()),
+		channel_1(new Tio(*Noux::terminal(), Tio::STDOUT, sig_rec), Genode::env()->heap()),
+		channel_2(new Tio(*Noux::terminal(), Tio::STDERR, sig_rec), Genode::env()->heap());
 
 	init_child->add_io_channel(channel_0, 0);
 	init_child->add_io_channel(channel_1, 1);

ports/src/noux/terminal_connection.h

@@ -0,0 +1,34 @@
+/*
+ * \brief  Terminal connection
+ * \author Josef Soentgen
+ * \date   2012-08-02
+ */
+
+/*
+ * Copyright (C) 2012 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#ifndef _NOUX__TERMINAL_CONNECTION_H_
+#define _NOUX__TERMINAL_CONNECTION_H_
+
+/* Genode includes */
+#include <base/printf.h>
+#include <base/lock.h>
+#include <terminal_session/connection.h>
+#include <util/string.h>
+
+/* Noux includes */
+#include <noux_session/sysio.h>
+#include "file_system.h"
+
+
+namespace Noux {
+
+	Terminal::Connection *terminal();
+
+}
+
+#endif /* _NOUX__TERMINAL_CONNECTION_H_ */