[issue44205] shutil.copystat can fail when copying to a file system with a smaller limit

[wiso]

Change by wiso :


--
nosy: +wiso

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[issue44205] shutil.copystat can fail when copying to a file system with a smaller limit

[Zachary Marshall]

Change by Zachary Marshall :


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nosy: +zlmarshall

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[issue44205] shutil.copystat can fail when copying to a file system with a smaller limit

[Chris Burr]

Change by Chris Burr :


--
keywords: +patch
pull_requests: +24888
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/26282

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[issue44205] shutil.copystat can fail when copying to a file system with a smaller limit

[Chris Burr]

New submission from Chris Burr :

When copying files between systems with different limits on the size of the 
extended attributes that can be added to a file shutil.copystat can fail with:

/cvmfs/lhcb.cern.ch/lib/var/lib/LbEnv/2064/stable/linux-64/lib/python3.8/shutil.py
 in copystat(src, dst, follow_symlinks)
377 # We must copy extended attributes before the file is (potentially)
378 # chmod()'ed read-only, otherwise setxattr() will error with 
-EACCES.
--> 379 _copyxattr(src, dst, follow_symlinks=follow)
380 try:
381 lookup("chmod")(dst, mode, follow_symlinks=follow)

/cvmfs/lhcb.cern.ch/lib/var/lib/LbEnv/2064/stable/linux-64/lib/python3.8/shutil.py
 in _copyxattr(src, dst, follow_symlinks)
327 try:
328 value = os.getxattr(src, name, 
follow_symlinks=follow_symlinks)
--> 329 os.setxattr(dst, name, value, 
follow_symlinks=follow_symlinks)
330 except OSError as e:
331 if e.errno not in (errno.EPERM, errno.ENOTSUP, 
errno.ENODATA,

OSError: [Errno 28] No space left on device: '/tmp/lhcb'

This is caused by the destination filesystem having a smaller limit on the size 
of the extended attributes. I think this behaviour is unexpected as other 
failures are silently ignored (e.g. the destination doesn't support extended 
attributes).

--
components: Library (Lib)
messages: 394118
nosy: chrisburr
priority: normal
severity: normal
status: open
title: shutil.copystat can fail when copying to a file system with a smaller 
limit
type: crash
versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 
3.9

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