[Patches] [ python-Patches-635656 ] os.tempnam behavior in Windows

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Patches item #635656, was opened at 2002-11-08 14:34
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Category: Modules
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Roberto Lublinerman (rluble)
>Assigned to: Fred L. Drake, Jr. (fdrake)
Summary: os.tempnam behavior in Windows

Initial Comment:
os.tempnam behaviour under windows does no agree 
with the documentation.

Under Windows Temporary location takes precedence 
over specified directory, so tempnam("mydir") returns a 
filename on the temporary location instead of "mydir"

Reason: tempnam is implemented under Windows as a 
call to _tempname which behaves as described above 
acording to MS documentation.

Change: use GetTempFileName to get the desired 
behaviour.

File Modified: Modules/posixmodule.c

Error detected in: python v2.2
Corrected for Python v: 2.3

File revision: 2.271

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>Comment By: Tim Peters (tim_one)
Date: 2002-11-08 15:54

Message:
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Reassigned to Fred for pondering.  As far as I can tell, the 
Windows _tempnam is trying to emulate more-or-less 
standard Unix tempnam:  the first six man pages I found for 
tempnam on the web say that the envar TMPDIR takes 
precedence over the dir argument, if TMPDIR is writable.  
That's what Windows does too, except the name of the 
envar is TMP on Windows.

If that's so, the implementation of os.tempnam is entirely 
unsurprising, but the Python docs need more words, to 
clarify that the behavior depends on the platform C library.

Roberto, in no case do I expect to apply the patch:  
changing *behavior* here is dangerous to working code, 
and all signs say the function is working as intended, 
although not as documented.  Years of reality take 
precedence over missing docs.  If you need to force a 
particular directoy, see the docs for the tempfile module 
and its tempdir variable.

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Comment By: Tim Peters (tim_one)
Date: 2002-11-08 15:32

Message:
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Assigned to me.

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