Visitar URL original
GH-78079: Fix UNC device path root normalization in pathlib by barneygale · Pull Request #102003 · python/cpython · GitHub
Skip to content

GH-78079: Fix UNC device path root normalization in pathlib #102003

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
barneygale merged 10 commits into from
Apr 14, 2023
Merged

GH-78079: Fix UNC device path root normalization in pathlib #102003

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
10 commits
Select commit Hold shift + click to select a range
99f62bc
GH-78079: Fix UNC device path root normalization in pathlib
barneygale Feb 2, 2023
6651b67
A few more test cases
barneygale Feb 20, 2023
87519ba
Merge branch 'main' into gh-78079-win-device-path-roots
barneygale Feb 20, 2023
c444a3c
Update Lib/pathlib.py
barneygale Mar 10, 2023
36623c0
Fix handling of UNC paths with incomplete drives in glob(), walk(), etc.
barneygale Mar 10, 2023
aea236e
Test handling of UNC paths with incomplete drives in joinpath()
barneygale Mar 10, 2023
bb0af91
Merge branch 'main' into gh-78079-win-device-path-roots
barneygale Mar 10, 2023
f412f87
Merge branch 'main' into gh-78079-win-device-path-roots
barneygale Apr 3, 2023
8ff07fc
Merge branch 'main' into gh-78079-win-device-path-roots
barneygale Apr 9, 2023
723a5aa
Merge branch 'main' into gh-78079-win-device-path-roots
barneygale Apr 11, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Next Next commit
GH-78079: Fix UNC device path root normalization in pathlib 
We no longer add a root to device paths such as `//./PhysicalDrive0`,
`//?/BootPartition` and `//./c:` while normalizing. We also avoid adding a
root to incomplete UNC share paths, like `//`, `//a` and `//a/`.
  • Loading branch information
@barneygale
barneygale committed Feb 17, 2023
commit 99f62bcb23cee6121475c702f36ed34d54602bbd
11 changes: 8 additions & 3 deletions Lib/pathlib.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -281,9 +281,14 @@ def _parse_parts(cls, parts):
if altsep:
path = path.replace(altsep, sep)
drv, root, rel = cls._flavour.splitroot(path)
if drv.startswith(sep):
# pathlib assumes that UNC paths always have a root.
root = sep
if drv and not root and not drv.endswith(sep):
Comment thread
barneygale marked this conversation as resolved.
Outdated
drv_parts = drv.split(sep)
if len(drv_parts) == 4 and drv_parts[2] not in '?.':
# e.g. //server/share
root = sep
elif len(drv_parts) == 6:
# e.g. //?/unc/server/share
root = sep
Comment thread
barneygale marked this conversation as resolved.
unfiltered_parsed = [drv + root] + rel.split(sep)
parsed = [sys.intern(x) for x in unfiltered_parsed if x and x != '.']
return drv, root, parsed
Expand Down
8 changes: 8 additions & 0 deletions Lib/test/test_ntpath.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,7 @@ def test_splitroot(self):

# gh-81790: support device namespace, including UNC drives.
tester('ntpath.splitroot("//?/c:")', ("//?/c:", "", ""))
tester('ntpath.splitroot("//./c:")', ("//./c:", "", ""))
tester('ntpath.splitroot("//?/c:/")', ("//?/c:", "/", ""))
tester('ntpath.splitroot("//?/c:/dir")', ("//?/c:", "/", "dir"))
tester('ntpath.splitroot("//?/UNC")', ("//?/UNC", "", ""))
Expand All @@ -178,8 +179,12 @@ def test_splitroot(self):
tester('ntpath.splitroot("//?/VOLUME{00000000-0000-0000-0000-000000000000}/spam")',
('//?/VOLUME{00000000-0000-0000-0000-000000000000}', '/', 'spam'))
tester('ntpath.splitroot("//?/BootPartition/")', ("//?/BootPartition", "/", ""))
tester('ntpath.splitroot("//./BootPartition/")', ("//./BootPartition", "/", ""))
tester('ntpath.splitroot("//./PhysicalDrive0")', ("//./PhysicalDrive0", "", ""))
tester('ntpath.splitroot("//./nul")', ("//./nul", "", ""))

tester('ntpath.splitroot("\\\\?\\c:")', ("\\\\?\\c:", "", ""))
tester('ntpath.splitroot("\\\\.\\c:")', ("\\\\.\\c:", "", ""))
tester('ntpath.splitroot("\\\\?\\c:\\")', ("\\\\?\\c:", "\\", ""))
tester('ntpath.splitroot("\\\\?\\c:\\dir")', ("\\\\?\\c:", "\\", "dir"))
tester('ntpath.splitroot("\\\\?\\UNC")', ("\\\\?\\UNC", "", ""))
Expand All @@ -192,6 +197,9 @@ def test_splitroot(self):
tester('ntpath.splitroot("\\\\?\\VOLUME{00000000-0000-0000-0000-000000000000}\\spam")',
('\\\\?\\VOLUME{00000000-0000-0000-0000-000000000000}', '\\', 'spam'))
tester('ntpath.splitroot("\\\\?\\BootPartition\\")', ("\\\\?\\BootPartition", "\\", ""))
tester('ntpath.splitroot("\\\\.\\BootPartition\\")', ("\\\\.\\BootPartition", "\\", ""))
tester('ntpath.splitroot("\\\\.\\PhysicalDrive0")', ("\\\\.\\PhysicalDrive0", "", ""))
tester('ntpath.splitroot("\\\\.\\nul")', ("\\\\.\\nul", "", ""))

# gh-96290: support partial/invalid UNC drives
tester('ntpath.splitroot("//")', ("//", "", "")) # empty server & missing share
Expand Down
11 changes: 11 additions & 0 deletions Lib/test/test_pathlib.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,9 @@ def test_parse_parts(self):
check(['c:/a'], ('c:', '\\', ['c:\\', 'a']))
check(['/a'], ('', '\\', ['\\', 'a']))
# UNC paths.
check(['//'], ('\\\\', '', ['\\\\']))
check(['//a'], ('\\\\a', '', ['\\\\a']))
check(['//a/'], ('\\\\a\\', '', ['\\\\a\\']))
check(['//a/b'], ('\\\\a\\b', '\\', ['\\\\a\\b\\']))
check(['//a/b/'], ('\\\\a\\b', '\\', ['\\\\a\\b\\']))
check(['//a/b/c'], ('\\\\a\\b', '\\', ['\\\\a\\b\\', 'c']))
Expand All @@ -108,12 +111,20 @@ def test_parse_parts(self):
# UNC paths.
check(['a', '//b/c//', 'd'], ('\\\\b\\c', '\\', ['\\\\b\\c\\', 'd']))
# Extended paths.
check(['//./c:'], ('\\\\.\\c:', '', ['\\\\.\\c:']))
check(['//?/c:/'], ('\\\\?\\c:', '\\', ['\\\\?\\c:\\']))
check(['//?/c:/a'], ('\\\\?\\c:', '\\', ['\\\\?\\c:\\', 'a']))
check(['//?/c:/a', '/b'], ('\\\\?\\c:', '\\', ['\\\\?\\c:\\', 'b']))
# Extended UNC paths (format is "\\?\UNC\server\share").
check(['//?/UNC/'], ('\\\\?\\UNC\\', '', ['\\\\?\\UNC\\']))
check(['//?/UNC/b/c'], ('\\\\?\\UNC\\b\\c', '\\', ['\\\\?\\UNC\\b\\c\\']))
check(['//?/UNC/b/c/d'], ('\\\\?\\UNC\\b\\c', '\\', ['\\\\?\\UNC\\b\\c\\', 'd']))
# UNC device paths
check(['//./BootPartition/'], ('\\\\.\\BootPartition', '\\', ['\\\\.\\BootPartition\\']))
check(['//?/BootPartition/'], ('\\\\?\\BootPartition', '\\', ['\\\\?\\BootPartition\\']))
check(['//./PhysicalDrive0'], ('\\\\.\\PhysicalDrive0', '', ['\\\\.\\PhysicalDrive0']))
check(['//?/Volume{}/'], ('\\\\?\\Volume{}', '\\', ['\\\\?\\Volume{}\\']))
check(['//./nul'], ('\\\\.\\nul', '', ['\\\\.\\nul']))
# Second part has a root but not drive.
check(['a', '/b', 'c'], ('', '\\', ['\\', 'b', 'c']))
check(['Z:/a', '/b', 'c'], ('Z:', '\\', ['Z:\\', 'b', 'c']))
Expand Down
3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2023-02-17-21-14-40.gh-issue-78079.z3Szr6.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
Fix incorrect normalization of UNC device path roots, and partial UNC share
path roots, in :class:`pathlib.PurePath`. Pathlib no longer appends a
trailing slash to such paths.