youknowone · Oct 16, 2026 · Oct 15, 2026 · Oct 15, 2026 · chatgpt-codex-connector · Oct 16, 2026
diff --git a/Lib/os.py b/Lib/os.py
@@ -58,6 +58,11 @@ def _get_exports_list(module):
         __all__.append('_exit')
     except ImportError:
         pass
+    try:
+        from posix import _clearenv
+        __all__.append('_clearenv')
+    except ImportError:
+        pass
     import posixpath as path
 
     try:
@@ -131,6 +136,8 @@ def _add(str, fn):
     _add("HAVE_UNLINKAT",   "unlink")
     _add("HAVE_UNLINKAT",   "rmdir")
     _add("HAVE_UTIMENSAT",  "utime")
+    if _exists("statx"):
+        _set.add(statx)
     supports_dir_fd = _set
 
     _set = set()
@@ -152,6 +159,8 @@ def _add(str, fn):
     _add("HAVE_FPATHCONF",  "pathconf")
     if _exists("statvfs") and _exists("fstatvfs"): # mac os x10.3
         _add("HAVE_FSTATVFS", "statvfs")
+    if _exists("statx"):
+        _set.add(statx)
     supports_fd = _set
 
     _set = set()
@@ -190,6 +199,8 @@ def _add(str, fn):
     _add("HAVE_FSTATAT",    "stat")
     _add("HAVE_UTIMENSAT",  "utime")
     _add("MS_WINDOWS",      "stat")
+    if _exists("statx"):
+        _set.add(statx)
     supports_follow_symlinks = _set
 
     del _set
@@ -208,22 +219,29 @@ def _add(str, fn):
 # Super directory utilities.
 # (Inspired by Eric Raymond; the doc strings are mostly his)
 
-def makedirs(name, mode=0o777, exist_ok=False):
-    """makedirs(name [, mode=0o777][, exist_ok=False])
+def makedirs(name, mode=0o777, exist_ok=False, *, parent_mode=None):
+    """makedirs(name [, mode=0o777][, exist_ok=False][, parent_mode=None])
 
     Super-mkdir; create a leaf directory and all intermediate ones.  Works
     like mkdir, except that any intermediate path segment (not just the
     rightmost) will be created if it does not exist.  If the target
     directory already exists, raise an OSError if exist_ok is False.
-    Otherwise no exception is raised.  This is recursive.
+    Otherwise no exception is raised.  If parent_mode is not None, it will
+    be used as the mode for any newly-created, intermediate-level
+    directories. Otherwise, intermediate directories are created with the
+    default permissions (respecting umask).  This is recursive.
 
     """
     head, tail = path.split(name)
     if not tail:
         head, tail = path.split(head)
     if head and tail and not path.exists(head):
         try:
-            makedirs(head, exist_ok=exist_ok)
+            if parent_mode is not None:
+                makedirs(head, mode=parent_mode, exist_ok=exist_ok,
+                         parent_mode=parent_mode)
+            else:
+                makedirs(head, exist_ok=exist_ok)
         except FileExistsError:
             # Defeats race condition when another thread created the path
             pass
@@ -417,14 +435,16 @@ def walk(top, topdown=True, onerror=None, followlinks=False):
             # Yield before sub-directory traversal if going top down
             yield top, dirs, nondirs
             # Traverse into sub-directories
-            for dirname in reversed(dirs):
-                new_path = join(top, dirname)
-                # bpo-23605: os.path.islink() is used instead of caching
-                # entry.is_symlink() result during the loop on os.scandir() because
-                # the caller can replace the directory entry during the "yield"
-                # above.
-                if followlinks or not islink(new_path):
-                    stack.append(new_path)
+            if dirs:
+                prefix = join(top, top[:0])  # Add trailing slash
+                for dirname in reversed(dirs):
+                    new_path = prefix + dirname
+                    # bpo-23605: os.path.islink() is used instead of caching
+                    # entry.is_symlink() result during the loop on os.scandir() because
+                    # the caller can replace the directory entry during the "yield"
+                    # above.
+                    if followlinks or not islink(new_path):
+                        stack.append(new_path)
         else:
             # Yield after sub-directory traversal if going bottom up
             stack.append((top, dirs, nondirs))
@@ -766,6 +786,12 @@ def __ror__(self, other):
         new.update(self)
         return new
 
+    if _exists("_clearenv"):
+        def clear(self):
+            _clearenv()
+            self._data.clear()
+
+
 def _create_environ_mapping():
     if name == 'nt':
         # Where Env Var Names Must Be UPPERCASE

diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
@@ -22,6 +22,7 @@
 
 
 __all__ = [
+    "requires_root_user", "requires_non_root_user",
     # globals
     "PIPE_MAX_SIZE", "verbose", "max_memuse", "use_resources", "failfast",
     # exceptions
@@ -3336,6 +3337,11 @@ def control_characters_c0() -> list[str]:
     return [chr(c) for c in range(0x00, 0x20)] + ["\x7F"]
 
 
+_ROOT_IN_POSIX = hasattr(os, 'geteuid') and os.geteuid() == 0
+requires_root_user = unittest.skipUnless(_ROOT_IN_POSIX, "test needs root privilege")
+requires_non_root_user = unittest.skipIf(_ROOT_IN_POSIX, "test needs non-root account")
+
+
 STATUS_DLL_INIT_FAILED = 0xC0000142
 def skip_on_low_desktop_heap_memory_subprocess(returncode):
     if sys.platform not in ('win32', 'cygwin'):

diff --git a/Lib/test/test_os/__init__.py b/Lib/test/test_os/__init__.py
@@ -0,0 +1,6 @@
+import os.path
+from test.support import load_package_tests
+
+
+def load_tests(*args):
+    return load_package_tests(os.path.dirname(__file__), *args)