[issue13234] os.listdir breaks with literal paths

[Santoso Wijaya]

Santoso Wijaya <santoso.wijaya at gmail.com> added the comment:

Additionally, there might be issues in other APIs when handling with extended path lengths:

D:\Temp\tempdir>dir
 Volume in drive D is Data
 Volume Serial Number is 7E3D-EC81

 Directory of D:\Temp\tempdir

10/24/2011  04:22 PM    <DIR>          .
10/24/2011  04:22 PM    <DIR>          ..
10/24/2011  04:28 PM    <DIR>          AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
10/24/2011  01:31 PM    <DIR>          sub1
10/24/2011  03:39 PM               262 test1.txt
               1 File(s)            262 bytes
               4 Dir(s)  244,483,321,856 bytes free

D:\Temp\tempdir>cd AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAA

D:\Temp\tempdir\AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAA>dir
 Volume in drive D is Data
 Volume Serial Number is 7E3D-EC81

 Directory of D:\Temp\tempdir\AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAA

10/24/2011  04:28 PM    <DIR>          .
10/24/2011  04:28 PM    <DIR>          ..
10/24/2011  04:14 PM                 0 1234567.txt
10/24/2011  04:28 PM    <DIR>          BBBBBBBBBBBBB
               1 File(s)              0 bytes
               3 Dir(s)  244,483,321,856 bytes free

Python 3.2 (r32:88445, Feb 20 2011, 21:30:00) [MSC v.1500 64 bit (AMD64)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> subdir = 'B'*13
>>> os.path.isdir(subdir)
False
>>> os.getcwd()
'D:\\Temp\\tempdir\\AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAA'
>>> subdir_abs = os.path.join(os.getcwd(), subdir)
>>> os.path.isdir(subdir)
False
>>> subdir_ext = r'\\?\%s' % subdir_abs
>>> os.path.isdir(subdir_ext)
True

In the above example, perhaps a ValueError('path too long') is better than returning False?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13234>
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