Bugs item #1394612, was opened at 2006-01-01 00:06
Message generated for change (Comment added) made by clintonroy
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Category: Python Library
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Cory Dodt (corydodt)
Assigned to: Nobody/Anonymous (nobody)
Summary: 'Plus' filemode exposes uninitialized memory on win32
Initial Comment:
(Note: I'm using cygwin zsh, hence the prompts. I am
using standard, python.org Python for these tests.)
% echo abcdef > foo
% python
Python 2.3.5 (#62, Feb 8 2005, 16:23:02) [MSC v.1200
32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for
more information.
>>> f = file('foo','r+b')
>>> f.write('ghi')
>>> f.read()
'\x00x\x01\x83\x00\xe8\x03\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00e\x00\x00i\x01
\x00d\x00\x00\x83\x01\x00Fd\x01\x00S\x00S\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0
0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0
0\x00\x00\x00[...lots and lots and lots of
uninitialized memory deleted...]\x00\x00\x00\x00\x00\
x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\
x00\x00\x00\x00abcdef\n'
>>> f.close()
>>>
----------------------------------------------------------------------
Comment By: Clinton Roy (clintonroy)
Date: 2006-01-01 05:38
Message:
Logged In: YES
user_id=31446
Hi Cory, I don't think r+ mode will create the file if it
doesn't exist, so at a guess I think what you're seeing is
the actual contents of a file named foo that are on the
disk, not junk. If you delete the file foo and run your test
again, you should get an error to that effect.
cheers,
----------------------------------------------------------------------
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