classification
Title: shutil.copystat can fail when copying to a file system with a smaller limit
Type: crash Stage: patch review
Components: Library (Lib) Versions: Python 3.11, Python 3.10, Python 3.9, Python 3.8, Python 3.7, Python 3.6
process
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: chrisburr, wiso, zlmarshall
Priority: normal Keywords: patch

Created on 2021-05-21 15:10 by chrisburr, last changed 2021-07-07 10:06 by wiso.

Pull Requests
URL Status Linked Edit
PR 26282 open chrisburr, 2021-05-21 15:12
Messages (1)
msg394118 - (view) Author: Chris Burr (chrisburr) * Date: 2021-05-21 15:10
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).
History
Date User Action Args
2021-07-07 10:06:03wisosetnosy: + wiso
2021-07-07 10:00:20zlmarshallsetnosy: + zlmarshall
2021-05-21 15:12:22chrisburrsetkeywords: + patch
stage: patch review
pull_requests: + pull_request24888
2021-05-21 15:10:36chrisburrcreate