private static TextWriter MakeDebugOutputTextWriter(String streamLabel)
{
TextWriter output = new __DebugOutputTextWriter(streamLabel);
output.WriteLine("Output redirected to debugger from a bit bucket.");
return TextWriter.Synchronized(output);
}
// For console apps, the console handles are set to values like 3, 7,
// and 11 OR if you've been created via CreateProcess, possibly -1
// or 0. -1 is definitely invalid, while 0 is probably invalid.
// Also note each handle can independently be invalid or good.
// For Windows apps, the console handles are set to values like 3, 7,
// and 11 but are invalid handles - you may not write to them. However,
// you can still spawn a Windows app via CreateProcess and read stdout
// and stderr.
// So, we always need to check each handle independently for validity
// by trying to write or read to it, unless it is -1.
// We do not do a security check here, under the assumption that this
// cannot create a security hole, but only waste a user's time or
// cause a possible denial of service attack.
private static void InitializeStdOutError(bool stdout)
{
// Set up Console.Out or Console.Error.
lock (InternalSyncObject)
{
if (stdout && _out != null)
{
return;
}
else if (!stdout && _error != null)
{
return;
}
TextWriter writer = null;
#if USE_DEBUG_CONSOLE
writer = new __DebugOutputTextWriter();
#else
Stream s;
if (stdout)
{
s = OpenStandardOutput(DefaultConsoleBufferSize);
}
else
{
s = OpenStandardError(DefaultConsoleBufferSize);
}
if (s == Stream.Null)
{
writer = TextWriter.Synchronized(StreamWriter.Null);
}
else
{
Encoding encoding = OutputEncoding;
StreamWriter stdxxx = new StreamWriter(s, encoding, DefaultConsoleBufferSize, true);
stdxxx.HaveWrittenPreamble = true;
stdxxx.AutoFlush = true;
writer = TextWriter.Synchronized(stdxxx);
}
#endif // USE_DEBUG_CONSOLE
if (stdout)
{
_out = writer;
}
else
{
_error = writer;
}
}
}
