windows and file names > 256 bytes

Albert-Jan Roskam fomcl at yahoo.com
Wed Jun 24 13:45:31 EDT 2015


Hi,

Consider the following calls, where very_long_path is more than 256 bytes:
[1] os.mkdir(very_long_path)
[2] os.getsize(very_long_path)
[3] shutil.rmtree(very_long_path)

I am using Python 2.7 and [1] and [2] fail under Windows XP [3] fails 
under Win7 (not sure about XP). This is even when I use the "special" 
notations \\?\c:\dir\file or \\?\UNC\server\share\file, e.g.
os.path.getsize("\\\\?\\" + "c:\\dir\\file")
(Oddly, os.path.getsize(os.path.join("\\\\?", "c:\\dir\\file")) will 
truncate the prefix)

My questions:
1. How can I get the file size of very long paths under XP?
2. Is this a bug in Python? I would prefer if Python dealt with the gory 
details of Windows' silly behavior.

Regards,
Albert-Jan

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