[issue38633] shutil.copystat fails with PermissionError in WSL

[Sam Park]

Sam Park  added the comment:

FWIW I just ran into this today on Ubuntu 18.04 container on GKE 
1.21.5-gke.1302 and on a Ubuntu-with-Docker underlying node (if that's 
relevant). Applying the monkeypatch solves the issue as well.

--
nosy: +sam.park

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[issue38633] shutil.copystat fails with PermissionError in WSL

[Ben Spiller]

Ben Spiller  added the comment:

Looks like on WSL the errno is errno.EACCES rather than EPERM, so we just need 
to change the shutil._copyxattr error handler to also cope with that error code:

 except OSError as e:
- if e.errno not in (errno.EPERM, errno.ENOTSUP, errno.ENODATA):
+ if e.errno not in (errno.EPERM, errno.ENOTSUP, errno.ENODATA, 
errno.EACCES):
 raise

If anyone needs a workaround until this is fixed in shutil itself, you can do 
it by monkey-patching _copyxattr:

import errno, shutil
# have to monkey patch to work with WSL as workaround for 
https://bugs.python.org/issue38633
orig_copyxattr = shutil._copyxattr
def patched_copyxattr(src, dst, *, follow_symlinks=True):
try:
orig_copyxattr(src, dst, follow_symlinks=follow_symlinks)
except OSError as ex:
if ex.errno != errno.EACCES: raise
shutil._copyxattr = patched_copyxattr

--
nosy: +benspiller

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[issue38633] shutil.copystat fails with PermissionError in WSL

[Peter]

New submission from Peter :

Using shutil.copystat (and therefore also shutil.copytree) in WSL on any 
directories from a mounted Windows drive (i.e. /mnt/c/...) raises an 
shutil.Error "[Errno 13] Permission denied". 

It seems to fail when copying the extended filesystem attribute 
"system.wsl_case_sensitive" using os.setxattr() here: 
https://github.com/python/cpython/blob/da6ce58dd5ac109485af45878fca6bfd265b43e9/Lib/shutil.py#L322

Note that this only happens when both src and dst are on the mounted drive. If 
only one is on the drive and the other is e.g. in the home directory 
/home/username/, it will not raise an error. 

Quick way to test: 

cd /mnt/c/ && mkdir test1 && mkdir test2 && python -c "import shutil; 
shutil.copystat('test1', 'test2')"

--
components: Library (Lib), Windows
messages: 355655
nosy: paul.moore, pspeter, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: shutil.copystat fails with PermissionError in WSL
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8

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