Make various os functions available on Windows (#6500)

stdlib/os/__init__.pyi

@@ -416,6 +416,13 @@ def getpid() -> int: ...
 def getppid() -> int: ...
 def strerror(__code: int) -> str: ...
 def umask(__mask: int) -> int: ...
+@final
+class uname_result(NamedTuple):
+    sysname: str
+    nodename: str
+    release: str
+    version: str
+    machine: str
 
 if sys.platform != "win32":
     def ctermid() -> str: ...
@@ -447,13 +454,6 @@ if sys.platform != "win32":
     def getsid(__pid: int) -> int: ...
     def setsid() -> None: ...
     def setuid(__uid: int) -> None: ...
-    @final
-    class uname_result(NamedTuple):
-        sysname: str
-        nodename: str
-        release: str
-        version: str
-        machine: str
     def uname() -> uname_result: ...
 
 @overload
@@ -469,7 +469,7 @@ if sys.platform != "win32":
 
 def putenv(__name: bytes | str, __value: bytes | str) -> None: ...
 
-if sys.platform != "win32":
+if sys.platform != "win32" or sys.version_info >= (3, 9):
     def unsetenv(__name: bytes | str) -> None: ...
 
 _Opener = Callable[[str, int], int]
@@ -563,7 +563,9 @@ else:
     def dup2(fd: int, fd2: int, inheritable: bool = ...) -> None: ...
 
 def fstat(fd: int) -> stat_result: ...
+def ftruncate(__fd: int, __length: int) -> None: ...
 def fsync(fd: FileDescriptorLike) -> None: ...
+def isatty(__fd: int) -> bool: ...
 def lseek(__fd: int, __position: int, __how: int) -> int: ...
 def open(path: StrOrBytesPath, flags: int, mode: int = ..., *, dir_fd: int | None = ...) -> int: ...
 def pipe() -> tuple[int, int]: ...
@@ -577,10 +579,8 @@ if sys.platform != "win32":
         def fdatasync(fd: FileDescriptorLike) -> None: ...  # Unix only, not Mac
     def fpathconf(__fd: int, __name: str | int) -> int: ...
     def fstatvfs(__fd: int) -> statvfs_result: ...
-    def ftruncate(__fd: int, __length: int) -> None: ...
     def get_blocking(__fd: int) -> bool: ...
     def set_blocking(__fd: int, __blocking: bool) -> None: ...
-    def isatty(__fd: int) -> bool: ...
     def lockf(__fd: int, __command: int, __length: int) -> None: ...
     def openpty() -> tuple[int, int]: ...  # some flavors of Unix
     if sys.platform != "darwin":

tests/stubtest_allowlists/darwin.txt

@@ -57,9 +57,6 @@ grp.struct_group.n_unnamed_fields
 mimetypes.MimeTypes.read_windows_registry
 os.ST_NOSUID
 os.ST_RDONLY
-(os|posix).uname_result.n_fields
-(os|posix).uname_result.n_sequence_fields
-(os|posix).uname_result.n_unnamed_fields
 posix.chflags
 posix.dup2
 posix.lchflags

tests/stubtest_allowlists/linux.txt

@@ -62,9 +62,6 @@ mimetypes.MimeTypes.read_windows_registry
 (os|posix).sched_param.n_fields
 (os|posix).sched_param.n_sequence_fields
 (os|posix).sched_param.n_unnamed_fields
-(os|posix).uname_result.n_fields
-(os|posix).uname_result.n_sequence_fields
-(os|posix).uname_result.n_unnamed_fields
 (os|posix).waitid_result.n_fields
 (os|posix).waitid_result.n_sequence_fields
 (os|posix).waitid_result.n_unnamed_fields

tests/stubtest_allowlists/py3_common.txt

@@ -581,6 +581,9 @@ multiprocessing.synchronize.Semaphore.get_value
 (os|posix).times_result.n_fields
 (os|posix).times_result.n_sequence_fields
 (os|posix).times_result.n_unnamed_fields
+(os|posix).uname_result.n_fields
+(os|posix).uname_result.n_sequence_fields
+(os|posix).uname_result.n_unnamed_fields
 pickle.Pickler.memo
 pickle.Unpickler.memo
 pipes.Template.makepipeline

tests/stubtest_allowlists/win32-py310.txt

@@ -16,6 +16,5 @@ asyncio.IocpProactor.sendto
 asyncio.windows_events.IocpProactor.recvfrom
 asyncio.windows_events.IocpProactor.sendto
 msvcrt.GetErrorMode
-os.unsetenv
 socket.MsgFlag.MSG_ERRQUEUE
 subprocess.STARTUPINFO.copy

tests/stubtest_allowlists/win32-py39.txt

@@ -1,17 +1,4 @@
 
-# Missing from stubs, found by removing --ignore-missing-stub
-_winapi.CreateFileMapping
-_winapi.MapViewOfFile
-_winapi.OpenFileMapping
-_winapi.VirtualQuerySize
-asyncio.IocpProactor.recvfrom
-asyncio.IocpProactor.sendto
-asyncio.windows_events.IocpProactor.recvfrom
-asyncio.windows_events.IocpProactor.sendto
-os.unsetenv
-socket.MsgFlag.MSG_ERRQUEUE
-subprocess.STARTUPINFO.copy
-
 # Exists at runtime, but missing from stubs
 _winapi.CreateFileMapping
 _winapi.MapViewOfFile
@@ -21,6 +8,5 @@ asyncio.IocpProactor.recvfrom
 asyncio.IocpProactor.sendto
 asyncio.windows_events.IocpProactor.recvfrom
 asyncio.windows_events.IocpProactor.sendto
-os.unsetenv
 socket.MsgFlag.MSG_ERRQUEUE
 subprocess.STARTUPINFO.copy

tests/stubtest_allowlists/win32.txt

@@ -46,12 +46,9 @@ distutils.msvccompiler.MSVCCompiler.manifest_get_embed_info
 distutils.msvccompiler.MSVCCompiler.manifest_setup_ldargs
 distutils.msvccompiler.OldMSVCCompiler
 msvcrt.SetErrorMode
-os.ftruncate
 os.get_handle_inheritable
-os.isatty
 os.set_handle_inheritable
 os.statvfs_result
-os.uname_result
 signal.Signals.CTRL_BREAK_EVENT
 signal.Signals.CTRL_C_EVENT
 socket.MsgFlag.MSG_BCAST