Re: Redirect stdout to a buffer [Errno 9]

[Gabriel Genellina]

En Mon, 16 Nov 2009 14:17:52 -0300, Ecir Hana <ecir.h...@gmail.com>  
escribió:

I'm trying to write a simple Win32 app, which may run some Python
scripts. Since it is a Windows GUI app, I would like to redirect all
output (Python print, C printf, fprinf stderr, ...) to a text area
inside the app. In other words, I'm trying to log all the output from
the app (C, Python) to a window. So far, this works for C printf():
[...]
PS: Maybe I'm doind something wrong, but SetStdHandle() does not work
at all....

This worked for me:

#include <windows.h>
#include "Python.h"

int main()
{
  HANDLE hReadPipe, hWritePipe;
  DWORD nr, nw;
  char buffer[100];

  CreatePipe(
    &hReadPipe,
    &hWritePipe,
    NULL,
    1024);
  SetStdHandle(STD_OUTPUT_HANDLE, hWritePipe);

  Py_Initialize();
  PyRun_SimpleString("print 'from Python'");
  Py_Finalize();

  puts("from C\n");

  CloseHandle(hWritePipe);
  ReadFile(hReadPipe, buffer, 19, &nr, NULL);
  CloseHandle(hReadPipe);
  WriteFile(GetStdHandle(STD_ERROR_HANDLE), buffer, nr, &nw, NULL);
}

Also, maybe this matters: it's on WinXP, Python 2.6 and MinGW GCC.

I'm using Visual Studio 2008 Express Edition.

--
Gabriel Genellina

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