[New-bugs-announce] [issue10080] Py_Initialize crashes when stdout has been redirected with freopen

Mitchell Stokes report at bugs.python.org
Wed Oct 13 06:11:15 CEST 2010

New submission from Mitchell Stokes <mogurijin at gmail.com>:

I have Python embedded in a C/C++ program, and I'm trying to redirect stdout to a text file. Since I'm trying to get rid of the console, I want C and Python stdout going to the text file (so, not sys.stdout = open('log.txt', 'w')). To this end, I used freopen() like so:

freopen("log.txt", "w", stdout);

to redirect stdout in C. However, when using Python 3.1, I get the following error:

Fatal Python error: Py_Initialize: can't initialize sys standard streams
OSError: [Errno 9] Bad file descriptor

followed by a crash (Runtime Error). I think this is somewhat related to this bug: http://bugs.python.org/issue1415

I've attached a sample program that illustrates the problem. I compiled it with:

gcc -o py_main.exe py_main.c -IC:\Python31\include -LC:\Python31\libs -lpython31

I had someone test the sample program on Linux, and it worked fine there, so I think it's a Windows issue.

components: Windows
files: py_main.c
messages: 118502
nosy: Mitchell.Stokes
priority: normal
severity: normal
status: open
title: Py_Initialize crashes when stdout has been redirected with freopen
type: crash
versions: Python 3.1
Added file: http://bugs.python.org/file19212/py_main.c

Python tracker <report at bugs.python.org>

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