Eryk Sun <eryk...@gmail.com> added the comment:
os__getvolumepathname_impl in Modules/posixmodule.c doesn't directly modify the
case. So that leaves WinAPI GetVolumePathNameW as the culprit, but, according
to the following test, apparently not in Windows 10.0.17134:
kernel32 = ctypes.WinDLL('kernel32', use_last_error=True)
path = (ctypes.c_wchar * 4)()
kernel32.GetVolumePathNameW(r'c:\windows', path, 4)
>>> path.value
'c:\\'
On a related note, nowadays we need to be careful to only use a
case-insensitive comparison for drive letters and other device names. On
account of WSL, recent versions of NTFS support flagging directories as case
sensitive [1][2]. For example, a volume may be mounted using a junction in a
case-sensitive directory.
[1]:
https://blogs.msdn.microsoft.com/commandline/2018/02/28/per-directory-case-sensitivity-and-wsl
[2]:
https://blogs.msdn.microsoft.com/commandline/2018/06/14/improved-per-directory-case-sensitivity-support-in-wsl
----------
nosy: +eryksun
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<https://bugs.python.org/issue34195>
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