bpo-37834: Normalise handling of reparse points on Windows (GH-15231)
bpo-37834: Normalise handling of reparse points on Windows
* ntpath.realpath() and nt.stat() will traverse all supported reparse points (previously was mixed)
* nt.lstat() will let the OS traverse reparse points that are not name surrogates (previously would not traverse any reparse point)
* nt.[l]stat() will only set S_IFLNK for symlinks (previous behaviour)
* nt.readlink() will read destinations for symlinks and junction points only
bpo-1311: os.path.exists('nul') now returns True on Windows
* nt.stat('nul').st_mode is now S_IFCHR (previously was an error)
This commit is contained in:
Steve Dower
GitHub
parent
bcc446f525
commit
df2d4a6f3d
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@ -1858,6 +1858,12 @@ features:
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.. versionchanged:: 3.6
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Accepts a :term:`path-like object` for *src* and *dst*.
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.. versionchanged:: 3.8
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On Windows, now opens reparse points that represent another path
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(name surrogates), including symbolic links and directory junctions.
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Other kinds of reparse points are resolved by the operating system as
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for :func:`~os.stat`.
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.. function:: mkdir(path, mode=0o777, *, dir_fd=None)
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@ -2039,6 +2045,10 @@ features:
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This function can also support :ref:`paths relative to directory descriptors
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<dir_fd>`.
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When trying to resolve a path that may contain links, use
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:func:`~os.path.realpath` to properly handle recursion and platform
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differences.
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.. availability:: Unix, Windows.
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.. versionchanged:: 3.2
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@ -2053,6 +2063,11 @@ features:
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.. versionchanged:: 3.8
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Accepts a :term:`path-like object` and a bytes object on Windows.
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.. versionchanged:: 3.8
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Added support for directory junctions, and changed to return the
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substitution path (which typically includes ``\\?\`` prefix) rather
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than the optional "print name" field that was previously returned.
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.. function:: remove(path, *, dir_fd=None)
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Remove (delete) the file *path*. If *path* is a directory, an
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@ -2366,7 +2381,8 @@ features:
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On Unix, this method always requires a system call. On Windows, it
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only requires a system call if *follow_symlinks* is ``True`` and the
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entry is a symbolic link.
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entry is a reparse point (for example, a symbolic link or directory
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junction).
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On Windows, the ``st_ino``, ``st_dev`` and ``st_nlink`` attributes of the
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:class:`stat_result` are always set to zero. Call :func:`os.stat` to
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@ -2403,6 +2419,17 @@ features:
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This function can support :ref:`specifying a file descriptor <path_fd>` and
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:ref:`not following symlinks <follow_symlinks>`.
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On Windows, passing ``follow_symlinks=False`` will disable following all
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name-surrogate reparse points, which includes symlinks and directory
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junctions. Other types of reparse points that do not resemble links or that
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the operating system is unable to follow will be opened directly. When
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following a chain of multiple links, this may result in the original link
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being returned instead of the non-link that prevented full traversal. To
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obtain stat results for the final path in this case, use the
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:func:`os.path.realpath` function to resolve the path name as far as
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possible and call :func:`lstat` on the result. This does not apply to
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dangling symlinks or junction points, which will raise the usual exceptions.
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.. index:: module: stat
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Example::
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@ -2427,6 +2454,14 @@ features:
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.. versionchanged:: 3.6
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Accepts a :term:`path-like object`.
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.. versionchanged:: 3.8
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On Windows, all reparse points that can be resolved by the operating
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system are now followed, and passing ``follow_symlinks=False``
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disables following all name surrogate reparse points. If the operating
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system reaches a reparse point that it is not able to follow, *stat* now
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returns the information for the original path as if
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``follow_symlinks=False`` had been specified instead of raising an error.
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.. class:: stat_result
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@ -2578,7 +2613,7 @@ features:
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File type.
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On Windows systems, the following attribute is also available:
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On Windows systems, the following attributes are also available:
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.. attribute:: st_file_attributes
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@ -2587,6 +2622,12 @@ features:
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:c:func:`GetFileInformationByHandle`. See the ``FILE_ATTRIBUTE_*``
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constants in the :mod:`stat` module.
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.. attribute:: st_reparse_tag
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When :attr:`st_file_attributes` has the ``FILE_ATTRIBUTE_REPARSE_POINT``
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set, this field contains the tag identifying the type of reparse point.
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See the ``IO_REPARSE_TAG_*`` constants in the :mod:`stat` module.
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The standard module :mod:`stat` defines functions and constants that are
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useful for extracting information from a :c:type:`stat` structure. (On
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Windows, some items are filled with dummy values.)
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@ -2614,6 +2655,14 @@ features:
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.. versionadded:: 3.7
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Added the :attr:`st_fstype` member to Solaris/derivatives.
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.. versionadded:: 3.8
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Added the :attr:`st_reparse_tag` member on Windows.
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.. versionchanged:: 3.8
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On Windows, the :attr:`st_mode` member now identifies special
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files as :const:`S_IFCHR`, :const:`S_IFIFO` or :const:`S_IFBLK`
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as appropriate.
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.. function:: statvfs(path)
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Perform a :c:func:`statvfs` system call on the given path. The return value is
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@ -304,6 +304,10 @@ Directory and files operations
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Added a symlink attack resistant version that is used automatically
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if platform supports fd-based functions.
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.. versionchanged:: 3.8
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On Windows, will no longer delete the contents of a directory junction
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before removing the junction.
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.. attribute:: rmtree.avoids_symlink_attacks
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Indicates whether the current platform and implementation provides a
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@ -425,3 +425,13 @@ for more detail on the meaning of these constants.
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FILE_ATTRIBUTE_VIRTUAL
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.. versionadded:: 3.5
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On Windows, the following constants are available for comparing against the
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``st_reparse_tag`` member returned by :func:`os.lstat`. These are well-known
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constants, but are not an exhaustive list.
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.. data:: IO_REPARSE_TAG_SYMLINK
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IO_REPARSE_TAG_MOUNT_POINT
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IO_REPARSE_TAG_APPEXECLINK
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.. versionadded:: 3.8
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@ -808,6 +808,21 @@ A new :func:`os.memfd_create` function was added to wrap the
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``memfd_create()`` syscall.
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(Contributed by Zackery Spytz and Christian Heimes in :issue:`26836`.)
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On Windows, much of the manual logic for handling reparse points (including
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symlinks and directory junctions) has been delegated to the operating system.
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Specifically, :func:`os.stat` will now traverse anything supported by the
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operating system, while :func:`os.lstat` will only open reparse points that
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identify as "name surrogates" while others are opened as for :func:`os.stat`.
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In all cases, :attr:`stat_result.st_mode` will only have ``S_IFLNK`` set for
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symbolic links and not other kinds of reparse points. To identify other kinds
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of reparse point, check the new :attr:`stat_result.st_reparse_tag` attribute.
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On Windows, :func:`os.readlink` is now able to read directory junctions. Note
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that :func:`~os.path.islink` will return ``False`` for directory junctions,
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and so code that checks ``islink`` first will continue to treat junctions as
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directories, while code that handles errors from :func:`os.readlink` may now
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treat junctions as links.
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os.path
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-------
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@ -824,6 +839,9 @@ characters or bytes unrepresentable at the OS level.
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environment variable and does not use :envvar:`HOME`, which is not normally set
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for regular user accounts.
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:func:`~os.path.isdir` on Windows no longer returns true for a link to a
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non-existent directory.
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:func:`~os.path.realpath` on Windows now resolves reparse points, including
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symlinks and directory junctions.
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@ -912,6 +930,9 @@ format for new archives to improve portability and standards conformance,
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inherited from the corresponding change to the :mod:`tarfile` module.
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(Contributed by C.A.M. Gerlach in :issue:`30661`.)
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:func:`shutil.rmtree` on Windows now removes directory junctions without
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recursively removing their contents first.
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ssl
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---
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@ -84,6 +84,7 @@ struct _Py_stat_struct {
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time_t st_ctime;
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int st_ctime_nsec;
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unsigned long st_file_attributes;
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unsigned long st_reparse_tag;
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};
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#else
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# define _Py_stat_struct stat
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@ -452,7 +452,14 @@ def _copytree(entries, src, dst, symlinks, ignore, copy_function,
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dstname = os.path.join(dst, srcentry.name)
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srcobj = srcentry if use_srcentry else srcname
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try:
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if srcentry.is_symlink():
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is_symlink = srcentry.is_symlink()
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if is_symlink and os.name == 'nt':
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# Special check for directory junctions, which appear as
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# symlinks but we want to recurse.
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lstat = srcentry.stat(follow_symlinks=False)
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if lstat.st_reparse_tag == stat.IO_REPARSE_TAG_MOUNT_POINT:
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is_symlink = False
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if is_symlink:
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linkto = os.readlink(srcname)
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if symlinks:
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# We can't just leave it to `copy_function` because legacy
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@ -537,6 +544,37 @@ def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
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ignore_dangling_symlinks=ignore_dangling_symlinks,
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dirs_exist_ok=dirs_exist_ok)
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if hasattr(stat, 'FILE_ATTRIBUTE_REPARSE_POINT'):
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# Special handling for directory junctions to make them behave like
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# symlinks for shutil.rmtree, since in general they do not appear as
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# regular links.
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def _rmtree_isdir(entry):
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try:
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st = entry.stat(follow_symlinks=False)
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return (stat.S_ISDIR(st.st_mode) and not
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(st.st_file_attributes & stat.FILE_ATTRIBUTE_REPARSE_POINT
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and st.st_reparse_tag == stat.IO_REPARSE_TAG_MOUNT_POINT))
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except OSError:
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return False
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def _rmtree_islink(path):
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try:
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st = os.lstat(path)
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return (stat.S_ISLNK(st.st_mode) or
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(st.st_file_attributes & stat.FILE_ATTRIBUTE_REPARSE_POINT
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and st.st_reparse_tag == stat.IO_REPARSE_TAG_MOUNT_POINT))
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except OSError:
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return False
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else:
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def _rmtree_isdir(entry):
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try:
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return entry.is_dir(follow_symlinks=False)
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except OSError:
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return False
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def _rmtree_islink(path):
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return os.path.islink(path)
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# version vulnerable to race conditions
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def _rmtree_unsafe(path, onerror):
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try:
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@ -547,11 +585,7 @@ def _rmtree_unsafe(path, onerror):
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entries = []
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for entry in entries:
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fullname = entry.path
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try:
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is_dir = entry.is_dir(follow_symlinks=False)
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except OSError:
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is_dir = False
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if is_dir:
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if _rmtree_isdir(entry):
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try:
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if entry.is_symlink():
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# This can only happen if someone replaces
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@ -681,7 +715,7 @@ def rmtree(path, ignore_errors=False, onerror=None):
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os.close(fd)
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else:
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try:
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if os.path.islink(path):
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if _rmtree_islink(path):
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# symlinks to directories are forbidden, see bug #1669
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raise OSError("Cannot call rmtree on a symbolic link")
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except OSError:
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@ -8,6 +8,7 @@ import codecs
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import contextlib
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import decimal
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import errno
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import fnmatch
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import fractions
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import itertools
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import locale
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@ -2253,6 +2254,20 @@ class ReadlinkTests(unittest.TestCase):
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filelinkb = os.fsencode(filelink)
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filelinkb_target = os.fsencode(filelink_target)
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def assertPathEqual(self, left, right):
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left = os.path.normcase(left)
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right = os.path.normcase(right)
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if sys.platform == 'win32':
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# Bad practice to blindly strip the prefix as it may be required to
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# correctly refer to the file, but we're only comparing paths here.
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has_prefix = lambda p: p.startswith(
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b'\\\\?\\' if isinstance(p, bytes) else '\\\\?\\')
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if has_prefix(left):
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left = left[4:]
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if has_prefix(right):
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right = right[4:]
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self.assertEqual(left, right)
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def setUp(self):
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self.assertTrue(os.path.exists(self.filelink_target))
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self.assertTrue(os.path.exists(self.filelinkb_target))
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@ -2274,14 +2289,14 @@ class ReadlinkTests(unittest.TestCase):
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os.symlink(self.filelink_target, self.filelink)
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self.addCleanup(support.unlink, self.filelink)
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filelink = FakePath(self.filelink)
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self.assertEqual(os.readlink(filelink), self.filelink_target)
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self.assertPathEqual(os.readlink(filelink), self.filelink_target)
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@support.skip_unless_symlink
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def test_pathlike_bytes(self):
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os.symlink(self.filelinkb_target, self.filelinkb)
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self.addCleanup(support.unlink, self.filelinkb)
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path = os.readlink(FakePath(self.filelinkb))
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self.assertEqual(path, self.filelinkb_target)
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self.assertPathEqual(path, self.filelinkb_target)
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self.assertIsInstance(path, bytes)
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@support.skip_unless_symlink
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@ -2289,7 +2304,7 @@ class ReadlinkTests(unittest.TestCase):
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os.symlink(self.filelinkb_target, self.filelinkb)
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self.addCleanup(support.unlink, self.filelinkb)
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path = os.readlink(self.filelinkb)
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self.assertEqual(path, self.filelinkb_target)
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self.assertPathEqual(path, self.filelinkb_target)
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self.assertIsInstance(path, bytes)
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@ -2348,16 +2363,12 @@ class Win32SymlinkTests(unittest.TestCase):
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# was created with target_is_dir==True.
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os.remove(self.missing_link)
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@unittest.skip("currently fails; consider for improvement")
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def test_isdir_on_directory_link_to_missing_target(self):
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self._create_missing_dir_link()
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# consider having isdir return true for directory links
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self.assertTrue(os.path.isdir(self.missing_link))
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self.assertFalse(os.path.isdir(self.missing_link))
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@unittest.skip("currently fails; consider for improvement")
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def test_rmdir_on_directory_link_to_missing_target(self):
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self._create_missing_dir_link()
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# consider allowing rmdir to remove directory links
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os.rmdir(self.missing_link)
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def check_stat(self, link, target):
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@ -2453,6 +2464,24 @@ class Win32SymlinkTests(unittest.TestCase):
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except OSError:
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pass
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def test_appexeclink(self):
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root = os.path.expandvars(r'%LOCALAPPDATA%\Microsoft\WindowsApps')
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aliases = [os.path.join(root, a)
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for a in fnmatch.filter(os.listdir(root), '*.exe')]
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for alias in aliases:
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if support.verbose:
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print()
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print("Testing with", alias)
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st = os.lstat(alias)
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self.assertEqual(st, os.stat(alias))
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self.assertFalse(stat.S_ISLNK(st.st_mode))
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self.assertEqual(st.st_reparse_tag, stat.IO_REPARSE_TAG_APPEXECLINK)
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# testing the first one we see is sufficient
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break
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else:
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self.skipTest("test requires an app execution alias")
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@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
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class Win32JunctionTests(unittest.TestCase):
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junction = 'junctiontest'
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@ -2460,25 +2489,29 @@ class Win32JunctionTests(unittest.TestCase):
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def setUp(self):
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assert os.path.exists(self.junction_target)
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assert not os.path.exists(self.junction)
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assert not os.path.lexists(self.junction)
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def tearDown(self):
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if os.path.exists(self.junction):
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# os.rmdir delegates to Windows' RemoveDirectoryW,
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# which removes junction points safely.
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os.rmdir(self.junction)
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if os.path.lexists(self.junction):
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os.unlink(self.junction)
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def test_create_junction(self):
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_winapi.CreateJunction(self.junction_target, self.junction)
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self.assertTrue(os.path.lexists(self.junction))
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self.assertTrue(os.path.exists(self.junction))
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self.assertTrue(os.path.isdir(self.junction))
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self.assertNotEqual(os.stat(self.junction), os.lstat(self.junction))
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self.assertEqual(os.stat(self.junction), os.stat(self.junction_target))
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# Junctions are not recognized as links.
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# bpo-37834: Junctions are not recognized as links.
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self.assertFalse(os.path.islink(self.junction))
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self.assertEqual(os.path.normcase("\\\\?\\" + self.junction_target),
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os.path.normcase(os.readlink(self.junction)))
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def test_unlink_removes_junction(self):
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_winapi.CreateJunction(self.junction_target, self.junction)
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self.assertTrue(os.path.exists(self.junction))
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self.assertTrue(os.path.lexists(self.junction))
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os.unlink(self.junction)
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self.assertFalse(os.path.exists(self.junction))
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|
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@ -42,6 +42,11 @@ try:
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except ImportError:
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UID_GID_SUPPORT = False
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try:
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import _winapi
|
||||
except ImportError:
|
||||
_winapi = None
|
||||
|
||||
def _fake_rename(*args, **kwargs):
|
||||
# Pretend the destination path is on a different filesystem.
|
||||
raise OSError(getattr(errno, 'EXDEV', 18), "Invalid cross-device link")
|
||||
|
|
@ -226,6 +231,47 @@ class TestShutil(unittest.TestCase):
|
|||
self.assertTrue(os.path.exists(dir3))
|
||||
self.assertTrue(os.path.exists(file1))
|
||||
|
||||
@unittest.skipUnless(_winapi, 'only relevant on Windows')
|
||||
def test_rmtree_fails_on_junctions(self):
|
||||
tmp = self.mkdtemp()
|
||||
dir_ = os.path.join(tmp, 'dir')
|
||||
os.mkdir(dir_)
|
||||
link = os.path.join(tmp, 'link')
|
||||
_winapi.CreateJunction(dir_, link)
|
||||
self.assertRaises(OSError, shutil.rmtree, link)
|
||||
self.assertTrue(os.path.exists(dir_))
|
||||
self.assertTrue(os.path.lexists(link))
|
||||
errors = []
|
||||
def onerror(*args):
|
||||
errors.append(args)
|
||||
shutil.rmtree(link, onerror=onerror)
|
||||
self.assertEqual(len(errors), 1)
|
||||
self.assertIs(errors[0][0], os.path.islink)
|
||||
self.assertEqual(errors[0][1], link)
|
||||
self.assertIsInstance(errors[0][2][1], OSError)
|
||||
|
||||
@unittest.skipUnless(_winapi, 'only relevant on Windows')
|
||||
def test_rmtree_works_on_junctions(self):
|
||||
tmp = self.mkdtemp()
|
||||
dir1 = os.path.join(tmp, 'dir1')
|
||||
dir2 = os.path.join(dir1, 'dir2')
|
||||
dir3 = os.path.join(tmp, 'dir3')
|
||||
for d in dir1, dir2, dir3:
|
||||
os.mkdir(d)
|
||||
file1 = os.path.join(tmp, 'file1')
|
||||
write_file(file1, 'foo')
|
||||
link1 = os.path.join(dir1, 'link1')
|
||||
_winapi.CreateJunction(dir2, link1)
|
||||
link2 = os.path.join(dir1, 'link2')
|
||||
_winapi.CreateJunction(dir3, link2)
|
||||
link3 = os.path.join(dir1, 'link3')
|
||||
_winapi.CreateJunction(file1, link3)
|
||||
# make sure junctions are removed but not followed
|
||||
shutil.rmtree(dir1)
|
||||
self.assertFalse(os.path.exists(dir1))
|
||||
self.assertTrue(os.path.exists(dir3))
|
||||
self.assertTrue(os.path.exists(file1))
|
||||
|
||||
def test_rmtree_errors(self):
|
||||
# filename is guaranteed not to exist
|
||||
filename = tempfile.mktemp()
|
||||
|
|
@ -754,8 +800,12 @@ class TestShutil(unittest.TestCase):
|
|||
src_stat = os.lstat(src_link)
|
||||
shutil.copytree(src_dir, dst_dir, symlinks=True)
|
||||
self.assertTrue(os.path.islink(os.path.join(dst_dir, 'sub', 'link')))
|
||||
self.assertEqual(os.readlink(os.path.join(dst_dir, 'sub', 'link')),
|
||||
os.path.join(src_dir, 'file.txt'))
|
||||
actual = os.readlink(os.path.join(dst_dir, 'sub', 'link'))
|
||||
# Bad practice to blindly strip the prefix as it may be required to
|
||||
# correctly refer to the file, but we're only comparing paths here.
|
||||
if os.name == 'nt' and actual.startswith('\\\\?\\'):
|
||||
actual = actual[4:]
|
||||
self.assertEqual(actual, os.path.join(src_dir, 'file.txt'))
|
||||
dst_stat = os.lstat(dst_link)
|
||||
if hasattr(os, 'lchmod'):
|
||||
self.assertEqual(dst_stat.st_mode, src_stat.st_mode)
|
||||
|
|
@ -886,7 +936,6 @@ class TestShutil(unittest.TestCase):
|
|||
shutil.copytree(src, dst, copy_function=custom_cpfun)
|
||||
self.assertEqual(len(flag), 1)
|
||||
|
||||
@unittest.skipIf(os.name == 'nt', 'temporarily disabled on Windows')
|
||||
@unittest.skipUnless(hasattr(os, 'link'), 'requires os.link')
|
||||
def test_dont_copy_file_onto_link_to_itself(self):
|
||||
# bug 851123.
|
||||
|
|
@ -941,6 +990,20 @@ class TestShutil(unittest.TestCase):
|
|||
finally:
|
||||
shutil.rmtree(TESTFN, ignore_errors=True)
|
||||
|
||||
@unittest.skipUnless(_winapi, 'only relevant on Windows')
|
||||
def test_rmtree_on_junction(self):
|
||||
os.mkdir(TESTFN)
|
||||
try:
|
||||
src = os.path.join(TESTFN, 'cheese')
|
||||
dst = os.path.join(TESTFN, 'shop')
|
||||
os.mkdir(src)
|
||||
open(os.path.join(src, 'spam'), 'wb').close()
|
||||
_winapi.CreateJunction(src, dst)
|
||||
self.assertRaises(OSError, shutil.rmtree, dst)
|
||||
shutil.rmtree(dst, ignore_errors=True)
|
||||
finally:
|
||||
shutil.rmtree(TESTFN, ignore_errors=True)
|
||||
|
||||
# Issue #3002: copyfile and copytree block indefinitely on named pipes
|
||||
@unittest.skipUnless(hasattr(os, "mkfifo"), 'requires os.mkfifo()')
|
||||
def test_copyfile_named_pipe(self):
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
"""Tests for the lll script in the Tools/script directory."""
|
||||
|
||||
import os
|
||||
import sys
|
||||
import tempfile
|
||||
from test import support
|
||||
from test.test_tools import skip_if_missing, import_tool
|
||||
|
|
@ -26,12 +27,13 @@ class lllTests(unittest.TestCase):
|
|||
|
||||
with support.captured_stdout() as output:
|
||||
self.lll.main([dir1, dir2])
|
||||
prefix = '\\\\?\\' if os.name == 'nt' else ''
|
||||
self.assertEqual(output.getvalue(),
|
||||
f'{dir1}:\n'
|
||||
f'symlink -> {fn1}\n'
|
||||
f'symlink -> {prefix}{fn1}\n'
|
||||
f'\n'
|
||||
f'{dir2}:\n'
|
||||
f'symlink -> {fn2}\n'
|
||||
f'symlink -> {prefix}{fn2}\n'
|
||||
)
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -394,11 +394,7 @@ class EnsurePipTest(BaseTest):
|
|||
with open(os.devnull, "rb") as f:
|
||||
self.assertEqual(f.read(), b"")
|
||||
|
||||
# Issue #20541: os.path.exists('nul') is False on Windows
|
||||
if os.devnull.lower() == 'nul':
|
||||
self.assertFalse(os.path.exists(os.devnull))
|
||||
else:
|
||||
self.assertTrue(os.path.exists(os.devnull))
|
||||
self.assertTrue(os.path.exists(os.devnull))
|
||||
|
||||
def do_test_with_pip(self, system_site_packages):
|
||||
rmtree(self.env_dir)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,2 @@
|
|||
Treat all name surrogate reparse points on Windows in :func:`os.lstat` and
|
||||
other reparse points as regular files in :func:`os.stat`.
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
The ``nul`` file on Windows now returns True from :func:`~os.path.exists`
|
||||
and a valid result from :func:`os.stat` with ``S_IFCHR`` set.
|
||||
|
|
@ -589,6 +589,13 @@ PyInit__stat(void)
|
|||
if (PyModule_AddIntMacro(m, FILE_ATTRIBUTE_SYSTEM)) return NULL;
|
||||
if (PyModule_AddIntMacro(m, FILE_ATTRIBUTE_TEMPORARY)) return NULL;
|
||||
if (PyModule_AddIntMacro(m, FILE_ATTRIBUTE_VIRTUAL)) return NULL;
|
||||
|
||||
if (PyModule_AddObject(m, "IO_REPARSE_TAG_SYMLINK",
|
||||
PyLong_FromUnsignedLong(IO_REPARSE_TAG_SYMLINK))) return NULL;
|
||||
if (PyModule_AddObject(m, "IO_REPARSE_TAG_MOUNT_POINT",
|
||||
PyLong_FromUnsignedLong(IO_REPARSE_TAG_MOUNT_POINT))) return NULL;
|
||||
if (PyModule_AddObject(m, "IO_REPARSE_TAG_APPEXECLINK",
|
||||
PyLong_FromUnsignedLong(IO_REPARSE_TAG_APPEXECLINK))) return NULL;
|
||||
#endif
|
||||
|
||||
return m;
|
||||
|
|
|
|||
|
|
@ -1272,19 +1272,6 @@ exit:
|
|||
|
||||
#if defined(MS_WINDOWS)
|
||||
|
||||
PyDoc_STRVAR(os__isdir__doc__,
|
||||
"_isdir($module, path, /)\n"
|
||||
"--\n"
|
||||
"\n"
|
||||
"Return true if the pathname refers to an existing directory.");
|
||||
|
||||
#define OS__ISDIR_METHODDEF \
|
||||
{"_isdir", (PyCFunction)os__isdir, METH_O, os__isdir__doc__},
|
||||
|
||||
#endif /* defined(MS_WINDOWS) */
|
||||
|
||||
#if defined(MS_WINDOWS)
|
||||
|
||||
PyDoc_STRVAR(os__getvolumepathname__doc__,
|
||||
"_getvolumepathname($module, /, path)\n"
|
||||
"--\n"
|
||||
|
|
@ -8274,10 +8261,6 @@ exit:
|
|||
#define OS__GETFINALPATHNAME_METHODDEF
|
||||
#endif /* !defined(OS__GETFINALPATHNAME_METHODDEF) */
|
||||
|
||||
#ifndef OS__ISDIR_METHODDEF
|
||||
#define OS__ISDIR_METHODDEF
|
||||
#endif /* !defined(OS__ISDIR_METHODDEF) */
|
||||
|
||||
#ifndef OS__GETVOLUMEPATHNAME_METHODDEF
|
||||
#define OS__GETVOLUMEPATHNAME_METHODDEF
|
||||
#endif /* !defined(OS__GETVOLUMEPATHNAME_METHODDEF) */
|
||||
|
|
@ -8741,4 +8724,4 @@ exit:
|
|||
#ifndef OS__REMOVE_DLL_DIRECTORY_METHODDEF
|
||||
#define OS__REMOVE_DLL_DIRECTORY_METHODDEF
|
||||
#endif /* !defined(OS__REMOVE_DLL_DIRECTORY_METHODDEF) */
|
||||
/*[clinic end generated code: output=1e001c855e011720 input=a9049054013a1b77]*/
|
||||
/*[clinic end generated code: output=b71eff00b91f5e43 input=a9049054013a1b77]*/
|
||||
|
|
|
|||
|
|
@ -1625,6 +1625,7 @@ win32_wchdir(LPCWSTR path)
|
|||
*/
|
||||
#define HAVE_STAT_NSEC 1
|
||||
#define HAVE_STRUCT_STAT_ST_FILE_ATTRIBUTES 1
|
||||
#define HAVE_STRUCT_STAT_ST_REPARSE_TAG 1
|
||||
|
||||
static void
|
||||
find_data_to_file_info(WIN32_FIND_DATAW *pFileData,
|
||||
|
|
@ -1658,136 +1659,178 @@ attributes_from_dir(LPCWSTR pszFile, BY_HANDLE_FILE_INFORMATION *info, ULONG *re
|
|||
return TRUE;
|
||||
}
|
||||
|
||||
static BOOL
|
||||
get_target_path(HANDLE hdl, wchar_t **target_path)
|
||||
{
|
||||
int buf_size, result_length;
|
||||
wchar_t *buf;
|
||||
|
||||
/* We have a good handle to the target, use it to determine
|
||||
the target path name (then we'll call lstat on it). */
|
||||
buf_size = GetFinalPathNameByHandleW(hdl, 0, 0,
|
||||
VOLUME_NAME_DOS);
|
||||
if(!buf_size)
|
||||
return FALSE;
|
||||
|
||||
buf = (wchar_t *)PyMem_RawMalloc((buf_size + 1) * sizeof(wchar_t));
|
||||
if (!buf) {
|
||||
SetLastError(ERROR_OUTOFMEMORY);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
result_length = GetFinalPathNameByHandleW(hdl,
|
||||
buf, buf_size, VOLUME_NAME_DOS);
|
||||
|
||||
if(!result_length) {
|
||||
PyMem_RawFree(buf);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
buf[result_length] = 0;
|
||||
|
||||
*target_path = buf;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static int
|
||||
win32_xstat_impl(const wchar_t *path, struct _Py_stat_struct *result,
|
||||
BOOL traverse)
|
||||
{
|
||||
int code;
|
||||
HANDLE hFile, hFile2;
|
||||
BY_HANDLE_FILE_INFORMATION info;
|
||||
ULONG reparse_tag = 0;
|
||||
wchar_t *target_path;
|
||||
const wchar_t *dot;
|
||||
HANDLE hFile;
|
||||
BY_HANDLE_FILE_INFORMATION fileInfo;
|
||||
FILE_ATTRIBUTE_TAG_INFO tagInfo = { 0 };
|
||||
DWORD fileType, error;
|
||||
BOOL isUnhandledTag = FALSE;
|
||||
int retval = 0;
|
||||
|
||||
hFile = CreateFileW(
|
||||
path,
|
||||
FILE_READ_ATTRIBUTES, /* desired access */
|
||||
0, /* share mode */
|
||||
NULL, /* security attributes */
|
||||
OPEN_EXISTING,
|
||||
/* FILE_FLAG_BACKUP_SEMANTICS is required to open a directory */
|
||||
/* FILE_FLAG_OPEN_REPARSE_POINT does not follow the symlink.
|
||||
Because of this, calls like GetFinalPathNameByHandle will return
|
||||
the symlink path again and not the actual final path. */
|
||||
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS|
|
||||
FILE_FLAG_OPEN_REPARSE_POINT,
|
||||
NULL);
|
||||
DWORD access = FILE_READ_ATTRIBUTES;
|
||||
DWORD flags = FILE_FLAG_BACKUP_SEMANTICS; /* Allow opening directories. */
|
||||
if (!traverse) {
|
||||
flags |= FILE_FLAG_OPEN_REPARSE_POINT;
|
||||
}
|
||||
|
||||
hFile = CreateFileW(path, access, 0, NULL, OPEN_EXISTING, flags, NULL);
|
||||
if (hFile == INVALID_HANDLE_VALUE) {
|
||||
/* Either the target doesn't exist, or we don't have access to
|
||||
get a handle to it. If the former, we need to return an error.
|
||||
If the latter, we can use attributes_from_dir. */
|
||||
DWORD lastError = GetLastError();
|
||||
if (lastError != ERROR_ACCESS_DENIED &&
|
||||
lastError != ERROR_SHARING_VIOLATION)
|
||||
return -1;
|
||||
/* Could not get attributes on open file. Fall back to
|
||||
reading the directory. */
|
||||
if (!attributes_from_dir(path, &info, &reparse_tag))
|
||||
/* Very strange. This should not fail now */
|
||||
return -1;
|
||||
if (info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
|
||||
if (traverse) {
|
||||
/* Should traverse, but could not open reparse point handle */
|
||||
SetLastError(lastError);
|
||||
/* Either the path doesn't exist, or the caller lacks access. */
|
||||
error = GetLastError();
|
||||
switch (error) {
|
||||
case ERROR_ACCESS_DENIED: /* Cannot sync or read attributes. */
|
||||
case ERROR_SHARING_VIOLATION: /* It's a paging file. */
|
||||
/* Try reading the parent directory. */
|
||||
if (!attributes_from_dir(path, &fileInfo, &tagInfo.ReparseTag)) {
|
||||
/* Cannot read the parent directory. */
|
||||
SetLastError(error);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if (!GetFileInformationByHandle(hFile, &info)) {
|
||||
CloseHandle(hFile);
|
||||
return -1;
|
||||
}
|
||||
if (info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
|
||||
if (!win32_get_reparse_tag(hFile, &reparse_tag)) {
|
||||
CloseHandle(hFile);
|
||||
return -1;
|
||||
}
|
||||
/* Close the outer open file handle now that we're about to
|
||||
reopen it with different flags. */
|
||||
if (!CloseHandle(hFile))
|
||||
return -1;
|
||||
|
||||
if (traverse) {
|
||||
/* In order to call GetFinalPathNameByHandle we need to open
|
||||
the file without the reparse handling flag set. */
|
||||
hFile2 = CreateFileW(
|
||||
path, FILE_READ_ATTRIBUTES, FILE_SHARE_READ,
|
||||
NULL, OPEN_EXISTING,
|
||||
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS,
|
||||
NULL);
|
||||
if (hFile2 == INVALID_HANDLE_VALUE)
|
||||
return -1;
|
||||
|
||||
if (!get_target_path(hFile2, &target_path)) {
|
||||
CloseHandle(hFile2);
|
||||
if (fileInfo.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
|
||||
if (traverse ||
|
||||
!IsReparseTagNameSurrogate(tagInfo.ReparseTag)) {
|
||||
/* The stat call has to traverse but cannot, so fail. */
|
||||
SetLastError(error);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!CloseHandle(hFile2)) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
code = win32_xstat_impl(target_path, result, FALSE);
|
||||
PyMem_RawFree(target_path);
|
||||
return code;
|
||||
}
|
||||
} else
|
||||
CloseHandle(hFile);
|
||||
}
|
||||
_Py_attribute_data_to_stat(&info, reparse_tag, result);
|
||||
break;
|
||||
|
||||
/* Set S_IEXEC if it is an .exe, .bat, ... */
|
||||
dot = wcsrchr(path, '.');
|
||||
if (dot) {
|
||||
if (_wcsicmp(dot, L".bat") == 0 || _wcsicmp(dot, L".cmd") == 0 ||
|
||||
_wcsicmp(dot, L".exe") == 0 || _wcsicmp(dot, L".com") == 0)
|
||||
result->st_mode |= 0111;
|
||||
case ERROR_INVALID_PARAMETER:
|
||||
/* \\.\con requires read or write access. */
|
||||
hFile = CreateFileW(path, access | GENERIC_READ,
|
||||
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
|
||||
OPEN_EXISTING, flags, NULL);
|
||||
if (hFile == INVALID_HANDLE_VALUE) {
|
||||
SetLastError(error);
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
|
||||
case ERROR_CANT_ACCESS_FILE:
|
||||
/* bpo37834: open unhandled reparse points if traverse fails. */
|
||||
if (traverse) {
|
||||
traverse = FALSE;
|
||||
isUnhandledTag = TRUE;
|
||||
hFile = CreateFileW(path, access, 0, NULL, OPEN_EXISTING,
|
||||
flags | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
|
||||
}
|
||||
if (hFile == INVALID_HANDLE_VALUE) {
|
||||
SetLastError(error);
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
|
||||
if (hFile != INVALID_HANDLE_VALUE) {
|
||||
/* Handle types other than files on disk. */
|
||||
fileType = GetFileType(hFile);
|
||||
if (fileType != FILE_TYPE_DISK) {
|
||||
if (fileType == FILE_TYPE_UNKNOWN && GetLastError() != 0) {
|
||||
retval = -1;
|
||||
goto cleanup;
|
||||
}
|
||||
DWORD fileAttributes = GetFileAttributesW(path);
|
||||
memset(result, 0, sizeof(*result));
|
||||
if (fileAttributes != INVALID_FILE_ATTRIBUTES &&
|
||||
fileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
|
||||
/* \\.\pipe\ or \\.\mailslot\ */
|
||||
result->st_mode = _S_IFDIR;
|
||||
} else if (fileType == FILE_TYPE_CHAR) {
|
||||
/* \\.\nul */
|
||||
result->st_mode = _S_IFCHR;
|
||||
} else if (fileType == FILE_TYPE_PIPE) {
|
||||
/* \\.\pipe\spam */
|
||||
result->st_mode = _S_IFIFO;
|
||||
}
|
||||
/* FILE_TYPE_UNKNOWN, e.g. \\.\mailslot\waitfor.exe\spam */
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
/* Query the reparse tag, and traverse a non-link. */
|
||||
if (!traverse) {
|
||||
if (!GetFileInformationByHandleEx(hFile, FileAttributeTagInfo,
|
||||
&tagInfo, sizeof(tagInfo))) {
|
||||
/* Allow devices that do not support FileAttributeTagInfo. */
|
||||
switch (GetLastError()) {
|
||||
case ERROR_INVALID_PARAMETER:
|
||||
case ERROR_INVALID_FUNCTION:
|
||||
case ERROR_NOT_SUPPORTED:
|
||||
tagInfo.FileAttributes = FILE_ATTRIBUTE_NORMAL;
|
||||
tagInfo.ReparseTag = 0;
|
||||
break;
|
||||
default:
|
||||
retval = -1;
|
||||
goto cleanup;
|
||||
}
|
||||
} else if (tagInfo.FileAttributes &
|
||||
FILE_ATTRIBUTE_REPARSE_POINT) {
|
||||
if (IsReparseTagNameSurrogate(tagInfo.ReparseTag)) {
|
||||
if (isUnhandledTag) {
|
||||
/* Traversing previously failed for either this link
|
||||
or its target. */
|
||||
SetLastError(ERROR_CANT_ACCESS_FILE);
|
||||
retval = -1;
|
||||
goto cleanup;
|
||||
}
|
||||
/* Traverse a non-link, but not if traversing already failed
|
||||
for an unhandled tag. */
|
||||
} else if (!isUnhandledTag) {
|
||||
CloseHandle(hFile);
|
||||
return win32_xstat_impl(path, result, TRUE);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!GetFileInformationByHandle(hFile, &fileInfo)) {
|
||||
switch (GetLastError()) {
|
||||
case ERROR_INVALID_PARAMETER:
|
||||
case ERROR_INVALID_FUNCTION:
|
||||
case ERROR_NOT_SUPPORTED:
|
||||
retval = -1;
|
||||
goto cleanup;
|
||||
}
|
||||
/* Volumes and physical disks are block devices, e.g.
|
||||
\\.\C: and \\.\PhysicalDrive0. */
|
||||
memset(result, 0, sizeof(*result));
|
||||
result->st_mode = 0x6000; /* S_IFBLK */
|
||||
goto cleanup;
|
||||
}
|
||||
}
|
||||
|
||||
_Py_attribute_data_to_stat(&fileInfo, tagInfo.ReparseTag, result);
|
||||
|
||||
if (!(fileInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
|
||||
/* Fix the file execute permissions. This hack sets S_IEXEC if
|
||||
the filename has an extension that is commonly used by files
|
||||
that CreateProcessW can execute. A real implementation calls
|
||||
GetSecurityInfo, OpenThreadToken/OpenProcessToken, and
|
||||
AccessCheck to check for generic read, write, and execute
|
||||
access. */
|
||||
const wchar_t *fileExtension = wcsrchr(path, '.');
|
||||
if (fileExtension) {
|
||||
if (_wcsicmp(fileExtension, L".exe") == 0 ||
|
||||
_wcsicmp(fileExtension, L".bat") == 0 ||
|
||||
_wcsicmp(fileExtension, L".cmd") == 0 ||
|
||||
_wcsicmp(fileExtension, L".com") == 0) {
|
||||
result->st_mode |= 0111;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
cleanup:
|
||||
if (hFile != INVALID_HANDLE_VALUE) {
|
||||
CloseHandle(hFile);
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int
|
||||
|
|
@ -1806,9 +1849,8 @@ win32_xstat(const wchar_t *path, struct _Py_stat_struct *result, BOOL traverse)
|
|||
default does not traverse symlinks and instead returns attributes for
|
||||
the symlink.
|
||||
|
||||
Therefore, win32_lstat will get the attributes traditionally, and
|
||||
win32_stat will first explicitly resolve the symlink target and then will
|
||||
call win32_lstat on that result. */
|
||||
Instead, we will open the file (which *does* traverse symlinks by default)
|
||||
and GetFileInformationByHandle(). */
|
||||
|
||||
static int
|
||||
win32_lstat(const wchar_t* path, struct _Py_stat_struct *result)
|
||||
|
|
@ -1876,6 +1918,9 @@ static PyStructSequence_Field stat_result_fields[] = {
|
|||
#endif
|
||||
#ifdef HAVE_STRUCT_STAT_ST_FSTYPE
|
||||
{"st_fstype", "Type of filesystem"},
|
||||
#endif
|
||||
#ifdef HAVE_STRUCT_STAT_ST_REPARSE_TAG
|
||||
{"st_reparse_tag", "Windows reparse tag"},
|
||||
#endif
|
||||
{0}
|
||||
};
|
||||
|
|
@ -1928,6 +1973,12 @@ static PyStructSequence_Field stat_result_fields[] = {
|
|||
#define ST_FSTYPE_IDX ST_FILE_ATTRIBUTES_IDX
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_STRUCT_STAT_ST_REPARSE_TAG
|
||||
#define ST_REPARSE_TAG_IDX (ST_FSTYPE_IDX+1)
|
||||
#else
|
||||
#define ST_REPARSE_TAG_IDX ST_FSTYPE_IDX
|
||||
#endif
|
||||
|
||||
static PyStructSequence_Desc stat_result_desc = {
|
||||
"stat_result", /* name */
|
||||
stat_result__doc__, /* doc */
|
||||
|
|
@ -2155,6 +2206,10 @@ _pystat_fromstructstat(STRUCT_STAT *st)
|
|||
PyStructSequence_SET_ITEM(v, ST_FSTYPE_IDX,
|
||||
PyUnicode_FromString(st->st_fstype));
|
||||
#endif
|
||||
#ifdef HAVE_STRUCT_STAT_ST_REPARSE_TAG
|
||||
PyStructSequence_SET_ITEM(v, ST_REPARSE_TAG_IDX,
|
||||
PyLong_FromUnsignedLong(st->st_reparse_tag));
|
||||
#endif
|
||||
|
||||
if (PyErr_Occurred()) {
|
||||
Py_DECREF(v);
|
||||
|
|
@ -3877,8 +3932,9 @@ os__getfinalpathname_impl(PyObject *module, path_t *path)
|
|||
}
|
||||
|
||||
result = PyUnicode_FromWideChar(target_path, result_length);
|
||||
if (path->narrow)
|
||||
if (result && path->narrow) {
|
||||
Py_SETREF(result, PyUnicode_EncodeFSDefault(result));
|
||||
}
|
||||
|
||||
cleanup:
|
||||
if (target_path != buf) {
|
||||
|
|
@ -3888,44 +3944,6 @@ cleanup:
|
|||
return result;
|
||||
}
|
||||
|
||||
/*[clinic input]
|
||||
os._isdir
|
||||
|
||||
path as arg: object
|
||||
/
|
||||
|
||||
Return true if the pathname refers to an existing directory.
|
||||
[clinic start generated code]*/
|
||||
|
||||
static PyObject *
|
||||
os__isdir(PyObject *module, PyObject *arg)
|
||||
/*[clinic end generated code: output=404f334d85d4bf25 input=36cb6785874d479e]*/
|
||||
{
|
||||
DWORD attributes;
|
||||
path_t path = PATH_T_INITIALIZE("_isdir", "path", 0, 0);
|
||||
|
||||
if (!path_converter(arg, &path)) {
|
||||
if (PyErr_ExceptionMatches(PyExc_ValueError)) {
|
||||
PyErr_Clear();
|
||||
Py_RETURN_FALSE;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
Py_BEGIN_ALLOW_THREADS
|
||||
attributes = GetFileAttributesW(path.wide);
|
||||
Py_END_ALLOW_THREADS
|
||||
|
||||
path_cleanup(&path);
|
||||
if (attributes == INVALID_FILE_ATTRIBUTES)
|
||||
Py_RETURN_FALSE;
|
||||
|
||||
if (attributes & FILE_ATTRIBUTE_DIRECTORY)
|
||||
Py_RETURN_TRUE;
|
||||
else
|
||||
Py_RETURN_FALSE;
|
||||
}
|
||||
|
||||
|
||||
/*[clinic input]
|
||||
os._getvolumepathname
|
||||
|
|
@ -7796,11 +7814,10 @@ os_readlink_impl(PyObject *module, path_t *path, int dir_fd)
|
|||
return PyBytes_FromStringAndSize(buffer, length);
|
||||
#elif defined(MS_WINDOWS)
|
||||
DWORD n_bytes_returned;
|
||||
DWORD io_result;
|
||||
DWORD io_result = 0;
|
||||
HANDLE reparse_point_handle;
|
||||
char target_buffer[_Py_MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
|
||||
_Py_REPARSE_DATA_BUFFER *rdb = (_Py_REPARSE_DATA_BUFFER *)target_buffer;
|
||||
const wchar_t *print_name;
|
||||
PyObject *result;
|
||||
|
||||
/* First get a handle to the reparse point */
|
||||
|
|
@ -7813,42 +7830,51 @@ os_readlink_impl(PyObject *module, path_t *path, int dir_fd)
|
|||
OPEN_EXISTING,
|
||||
FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS,
|
||||
0);
|
||||
Py_END_ALLOW_THREADS
|
||||
|
||||
if (reparse_point_handle == INVALID_HANDLE_VALUE) {
|
||||
return path_error(path);
|
||||
if (reparse_point_handle != INVALID_HANDLE_VALUE) {
|
||||
/* New call DeviceIoControl to read the reparse point */
|
||||
io_result = DeviceIoControl(
|
||||
reparse_point_handle,
|
||||
FSCTL_GET_REPARSE_POINT,
|
||||
0, 0, /* in buffer */
|
||||
target_buffer, sizeof(target_buffer),
|
||||
&n_bytes_returned,
|
||||
0 /* we're not using OVERLAPPED_IO */
|
||||
);
|
||||
CloseHandle(reparse_point_handle);
|
||||
}
|
||||
|
||||
Py_BEGIN_ALLOW_THREADS
|
||||
/* New call DeviceIoControl to read the reparse point */
|
||||
io_result = DeviceIoControl(
|
||||
reparse_point_handle,
|
||||
FSCTL_GET_REPARSE_POINT,
|
||||
0, 0, /* in buffer */
|
||||
target_buffer, sizeof(target_buffer),
|
||||
&n_bytes_returned,
|
||||
0 /* we're not using OVERLAPPED_IO */
|
||||
);
|
||||
CloseHandle(reparse_point_handle);
|
||||
Py_END_ALLOW_THREADS
|
||||
|
||||
if (io_result == 0) {
|
||||
return path_error(path);
|
||||
}
|
||||
|
||||
if (rdb->ReparseTag != IO_REPARSE_TAG_SYMLINK)
|
||||
wchar_t *name = NULL;
|
||||
Py_ssize_t nameLen = 0;
|
||||
if (rdb->ReparseTag == IO_REPARSE_TAG_SYMLINK)
|
||||
{
|
||||
PyErr_SetString(PyExc_ValueError,
|
||||
"not a symbolic link");
|
||||
return NULL;
|
||||
name = (wchar_t *)((char*)rdb->SymbolicLinkReparseBuffer.PathBuffer +
|
||||
rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset);
|
||||
nameLen = rdb->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof(wchar_t);
|
||||
}
|
||||
print_name = (wchar_t *)((char*)rdb->SymbolicLinkReparseBuffer.PathBuffer +
|
||||
rdb->SymbolicLinkReparseBuffer.PrintNameOffset);
|
||||
|
||||
result = PyUnicode_FromWideChar(print_name,
|
||||
rdb->SymbolicLinkReparseBuffer.PrintNameLength / sizeof(wchar_t));
|
||||
if (path->narrow) {
|
||||
Py_SETREF(result, PyUnicode_EncodeFSDefault(result));
|
||||
else if (rdb->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
|
||||
{
|
||||
name = (wchar_t *)((char*)rdb->MountPointReparseBuffer.PathBuffer +
|
||||
rdb->MountPointReparseBuffer.SubstituteNameOffset);
|
||||
nameLen = rdb->MountPointReparseBuffer.SubstituteNameLength / sizeof(wchar_t);
|
||||
}
|
||||
else
|
||||
{
|
||||
PyErr_SetString(PyExc_ValueError, "not a symbolic link");
|
||||
}
|
||||
if (name) {
|
||||
if (nameLen > 4 && wcsncmp(name, L"\\??\\", 4) == 0) {
|
||||
/* Our buffer is mutable, so this is okay */
|
||||
name[1] = L'\\';
|
||||
}
|
||||
result = PyUnicode_FromWideChar(name, nameLen);
|
||||
if (path->narrow) {
|
||||
Py_SETREF(result, PyUnicode_EncodeFSDefault(result));
|
||||
}
|
||||
}
|
||||
return result;
|
||||
#endif
|
||||
|
|
@ -13647,7 +13673,6 @@ static PyMethodDef posix_methods[] = {
|
|||
OS_PATHCONF_METHODDEF
|
||||
OS_ABORT_METHODDEF
|
||||
OS__GETFULLPATHNAME_METHODDEF
|
||||
OS__ISDIR_METHODDEF
|
||||
OS__GETDISKUSAGE_METHODDEF
|
||||
OS__GETFINALPATHNAME_METHODDEF
|
||||
OS__GETVOLUMEPATHNAME_METHODDEF
|
||||
|
|
|
|||
|
|
@ -878,7 +878,12 @@ _Py_attribute_data_to_stat(BY_HANDLE_FILE_INFORMATION *info, ULONG reparse_tag,
|
|||
FILE_TIME_to_time_t_nsec(&info->ftLastAccessTime, &result->st_atime, &result->st_atime_nsec);
|
||||
result->st_nlink = info->nNumberOfLinks;
|
||||
result->st_ino = (((uint64_t)info->nFileIndexHigh) << 32) + info->nFileIndexLow;
|
||||
if (reparse_tag == IO_REPARSE_TAG_SYMLINK) {
|
||||
/* bpo-37834: Only actual symlinks set the S_IFLNK flag. But lstat() will
|
||||
open other name surrogate reparse points without traversing them. To
|
||||
detect/handle these, check st_file_attributes and st_reparse_tag. */
|
||||
result->st_reparse_tag = reparse_tag;
|
||||
if (info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT &&
|
||||
reparse_tag == IO_REPARSE_TAG_SYMLINK) {
|
||||
/* first clear the S_IFMT bits */
|
||||
result->st_mode ^= (result->st_mode & S_IFMT);
|
||||
/* now set the bits that make this a symlink */
|
||||
|
|
|
|||
Loading…
Reference in New Issue