Add TrueCrypt 7.1a MacOSX/Linux specific source files.

src/Platform/Unix/Pipe.cpp

@@ -0,0 +1,65 @@
+/*
+ Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
+
+ Governed by the TrueCrypt License 3.0 the full text of which is contained in
+ the file License.txt included in TrueCrypt binary and source code distribution
+ packages.
+*/
+
+#include <unistd.h>
+#include "Pipe.h"
+#include "Platform/SystemException.h"
+
+namespace TrueCrypt
+{
+	Pipe::Pipe ()
+	{
+		int fd[2];
+		throw_sys_if (pipe (fd) == -1);
+		ReadFileDescriptor = fd[0];
+		WriteFileDescriptor = fd[1];
+	}
+
+	Pipe::~Pipe ()
+	{
+		try
+		{
+			Close();
+		}
+		catch (...) { }
+	}
+
+	void Pipe::Close ()
+	{
+		if (ReadFileDescriptor != -1)
+			close (ReadFileDescriptor);
+		if (WriteFileDescriptor != -1)
+			close (WriteFileDescriptor);
+	}
+
+	int Pipe::GetReadFD ()
+	{
+		assert (ReadFileDescriptor != -1);
+		
+		if (WriteFileDescriptor != -1)
+		{
+			close (WriteFileDescriptor);
+			WriteFileDescriptor = -1;
+		}
+
+		return ReadFileDescriptor;
+	}
+
+	int Pipe::GetWriteFD ()
+	{
+		assert (WriteFileDescriptor != -1);
+
+		if (ReadFileDescriptor != -1)
+		{
+			close (ReadFileDescriptor);
+			ReadFileDescriptor = -1;
+		}
+
+		return WriteFileDescriptor;
+	}
+}