[ python-Bugs-846133 ] os.chmod does not work with a unicode filename

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Bugs item #846133, was opened at 2003-11-20 16:27
Message generated for change (Comment added) made by meyeet
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Category: Unicode
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Eric Meyer (meyeet)
Assigned to: M.-A. Lemburg (lemburg)
Summary: os.chmod does not work with a unicode filename

Initial Comment:
I have a filename that contains Kanji characters and I'm 
trying change the permissions on the file.

I am running Python 2.3.1 on Windows 2000.  Also I 
have the japanese language pack installed so that I can 
view the kanji characters in Windows explorer.


>>> part
u'\u5171\u6709\u3055\u308c\u308b.txt'
>>> os.chmod(part, 0777)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
OSError: [Errno 22] Invalid argument: '?????.txt'
>>>

I attached the above named file for you to test against.

Thanks.

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>Comment By: Eric Meyer (meyeet)
Date: 2003-11-21 11:18

Message:
Logged In: YES 
user_id=913976

George,

I tried the following but I had to specify one of the japanese 
codecs during the unicode() call.  What is your default 
encoding set to?  Below are my results. 

>>> import os
>>> os.listdir('.')
[]
>>> u1 = unicode('\x82\xa0', 'cp932')
>>> u2 = u'\x82\xa0'
>>> u1, u2
(u'\u3042', u'\x82\xa0')
>>> print >> file(u1, 'w'), "hello world"
>>> os.listdir('.')
['?']
>>> os.chmod(u1, 0777)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
OSError: [Errno 22] Invalid argument: '?'

----------------------------------------------------------------------

Comment By: George Yoshida (quiver)
Date: 2003-11-20 19:07

Message:
Logged In: YES 
user_id=671362

I'm running Python in almost the same environment.

I guess this results from the different bihavior of u'' and 
unicode('').
If you convert a multi-byte character to a unicode 
character,
u'' and unicode('') don't return the same string.
unicode'' works as intended but u'' doesn't.
This is probably caused by the bug of Japanese codecs 
package.

Eric, please try the session below and tell me what 
happens.

NOTE: Japanese codecs needs to be installed to test the 
code below.
Otherwise, UnicodeDecodeError will be raised.
---

>>> import os
>>> os.listdir('.')
[]
>>> lst = ['\x82', '\xa0']   # japanese character
>>> u1 = unicode('\x82\xa0')
>>> u2 = u'\x82\xa0'
>>> u1 == u2
False
>>> u1, u2
(u'\u3042', u'\x82\xa0')  # u2 is odd
>>> print >> file(u1, 'w'), "hello world"
>>> os.listdir('.')
['&#12354;']
>>> os.chmod(u1, 0777)
>>> os.chmod(u2, 0777)

Traceback (most recent call last):
  File "<pyshell#179>", line 1, in -toplevel-
    os.chmod(u2, 0777)
OSError: [Errno 22] Invalid argument: '??'

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