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GH-118447: Fix handling of unreadable symlinks in os.path.realpath() (#118489)

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Co-authored-by: Nice Zombies <nineteendo19d0@gmail.com>
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Barney Gale 2024-05-18 23:40:51 +01:00 • committed by GitHub
parent 30b4e9f9c4
commit caf6064a1b
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3 changed files with 32 additions and 13 deletions
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26
Lib/posixpath.py
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@ -471,26 +471,26 @@ symbolic links encountered in the path."""
if not stat.S_ISLNK(st.st_mode):
path = newpath
continue
if newpath in seen:
# Already seen this path
path = seen[newpath]
if path is not None:
# use cached value
continue
# The symlink is not resolved, so we must have a symlink loop.
if strict:
# Raise OSError(errno.ELOOP)
os.stat(newpath)
path = newpath
continue
target = os.readlink(newpath)
except OSError:
if strict:
raise
path = newpath
continue
# Resolve the symbolic link
if newpath in seen:
# Already seen this path
path = seen[newpath]
if path is not None:
# use cached value
continue
# The symlink is not resolved, so we must have a symlink loop.
if strict:
# Raise OSError(errno.ELOOP)
os.stat(newpath)
path = newpath
continue
seen[newpath] = None # not resolved symlink
target = os.readlink(newpath)
if target.startswith(sep):
# Symlink target is absolute; reset resolved path.
path = sep