redirecting stdout

**ichijoji** · 08-15-2006

Hey all,

I'm working on a scripting console for my game engine and I've run into a problem getting everything from the real console to come up on my fake one. What I need to do is have some kind of buffered connection (preferably into a string or something similar) between stdout and my own acceptString function (ideally sending a string for every line that comes in from stdout). The solution I have to this right now works a little but not completely. Here's the python code that does it:

Code:

class RedirectStdout:
    def __init__(self):
        self.oldstdout = sys.stdout
        
    def __del__(self):
        sys.stdout = self.oldstdout
        
    def write(self, s):
        if s.strip() != "":
            self.oldstdout.write(s + "\n")
            gfxServer.appendString(s)

sys.stdout = RedirectStdout()

The problem with this is that it only redirects some of the python output. What I need is something similar in C++ that will work at a lower level and hopefully catch all of the output from stdout.

**Mario F.** · 08-15-2006

Look at rdbuf(). You can set the object associated with a stream.

**Tonto** · 08-15-2006

This windows specific code executes without error but does not actually redirect anything. It confuses me as to why.

Code:

	HANDLE hStdOut = ::GetStdHandle(STD_OUTPUT_HANDLE);

	HANDLE hFile   = ::CreateFile
		("C:\\abc.txt", GENERIC_WRITE, 
		FILE_SHARE_READ, 0, CREATE_ALWAYS, 
		FILE_ATTRIBUTE_NORMAL, 0);

	if(hFile != INVALID_HANDLE_VALUE)
	{

		if(::SetStdHandle(STD_OUTPUT_HANDLE, hFile))
		{
			std::cout << "Testing\n";
		}
		else
			std::cout << "Failed\n";


		::SetStdHandle(STD_OUTPUT_HANDLE, hStdOut);
		::CloseHandle(hFile);
	}
	else
		std::cout << "INVALID_HANDLE_VALUE: " << ::GetLastError() << std::endl;

Thread: redirecting stdout

Thread Tools

Search Thread

Display