mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-27 12:16:04 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-24538: Fix bug in shutil involving the copying of xattrs to read-only files. (PR-13212)

Browse source 
Extended attributes can only be set on user-writeable files, but shutil previously
first chmod()ed the destination file to the source's permissions and then tried to
copy xattrs. This will cause failures if attempting to copy read-only files with
xattrs, as occurs with Git clones on Lustre FS.
This commit is contained in:
Olexa Bilaniuk 2019-05-09 22:22:06 -05:00 • committed by Giampaolo Rodola
parent 948ed8c96b
commit 79efbb7193
4 changed files with 15 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Lib/shutil.py
View file

@ -359,6 +359,9 @@ def copystat(src, dst, *, follow_symlinks=True):
mode = stat.S_IMODE(st.st_mode)
lookup("utime")(dst, ns=(st.st_atime_ns, st.st_mtime_ns),
follow_symlinks=follow)
# We must copy extended attributes before the file is (potentially)
# chmod()'ed read-only, otherwise setxattr() will error with -EACCES.
_copyxattr(src, dst, follow_symlinks=follow)
try:
lookup("chmod")(dst, mode, follow_symlinks=follow)
except NotImplementedError:
@ -382,7 +385,6 @@ def copystat(src, dst, *, follow_symlinks=True):
break
else:
raise
_copyxattr(src, dst, follow_symlinks=follow)
def copy(src, dst, *, follow_symlinks=True):
"""Copy data and mode bits ("cp src dst"). Return the file's destination.