[ python-Bugs-1513646 ] os.access reports incorrect write permissions in Windows

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Bugs item #1513646, was opened at 2006-06-27 15:01
Message generated for change (Comment added) made by yi_ding
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Category: Windows
Group: Python 2.5
Status: Open
Resolution: None
Priority: 7
Submitted By: Yi S. Ding (yi_ding)
Assigned to: Martin v. Löwis (loewis)
Summary: os.access reports incorrect write permissions in Windows

Initial Comment:
Platform: Python 2.5b1 Windows XP

Bug:
os.access will report that a user doesn't have write
permissions to a file or directory when the user
actually does.

Reproducibility: always

This is being run on an administrator account.
>>> import os
>>> os.access("C:\\", os.W_OK)
False
>>> os.access("C:\\test.txt", os.W_OK)
False

I have also checked that Python can indeed write to the
file.

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>Comment By: Yi S. Ding (yi_ding)
Date: 2006-06-30 16:12

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Cool.  I added the new patch with the test case.

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Comment By: Neal Norwitz (nnorwitz)
Date: 2006-06-30 00:12

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Your change looks correct, but I would really like a test
case to fix this problem.  I don't have access to a Windows
box, so I can't verify the test fails before this patch and
succeeds with it.  Can you create a test case too?  The best
place to add the test would be Lib/test/test_posix.py.  Thanks!

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Comment By: Yi S. Ding (yi_ding)
Date: 2006-06-29 12:56

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Yeah, it's only 2.5, and only 2.5b1.  Basically, there's a
double ampersand used instead of a single ampersand in
posixmodule.c.  I've attached the patch.

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Comment By: Neal Norwitz (nnorwitz)
Date: 2006-06-27 22:28

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Does this problem only occur with 2.5 or is it also present
in 2.4?

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