fix: Add missing multiprocessing.util types (#8404)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stdlib/multiprocessing/util.pyi

@@ -0,0 +1,87 @@
+import threading
+from _typeshed import Incomplete, ReadableBuffer, SupportsTrunc
+from collections.abc import Callable, Iterable, Mapping, MutableMapping, Sequence
+from logging import Logger
+from typing import Any, SupportsInt
+from typing_extensions import SupportsIndex
+
+__all__ = [
+    "sub_debug",
+    "debug",
+    "info",
+    "sub_warning",
+    "get_logger",
+    "log_to_stderr",
+    "get_temp_dir",
+    "register_after_fork",
+    "is_exiting",
+    "Finalize",
+    "ForkAwareThreadLock",
+    "ForkAwareLocal",
+    "close_all_fds_except",
+    "SUBDEBUG",
+    "SUBWARNING",
+]
+
+NOTSET: int
+SUBDEBUG: int
+DEBUG: int
+INFO: int
+SUBWARNING: int
+
+LOGGER_NAME: str
+DEFAULT_LOGGING_FORMAT: str
+
+def sub_debug(msg: object, *args: object) -> None: ...
+def debug(msg: object, *args: object) -> None: ...
+def info(msg: object, *args: object) -> None: ...
+def sub_warning(msg: object, *args: object) -> None: ...
+def get_logger() -> Logger: ...
+def log_to_stderr(level: int | None = ...) -> Logger: ...
+def is_abstract_socket_namespace(address: str | bytes | None) -> bool: ...
+
+abstract_sockets_supported: bool
+
+def get_temp_dir() -> str: ...
+def register_after_fork(obj: Incomplete, func: Callable[[Incomplete], object]) -> None: ...
+
+class Finalize:
+    def __init__(
+        self,
+        obj: Incomplete | None,
+        callback: Callable[..., Incomplete],
+        args: Sequence[Any] = ...,
+        kwargs: Mapping[str, Any] | None = ...,
+        exitpriority: int | None = ...,
+    ) -> None: ...
+    def __call__(
+        self,
+        wr: object = ...,
+        _finalizer_registry: MutableMapping[Incomplete, Incomplete] = ...,
+        sub_debug: Callable[..., object] = ...,
+        getpid: Callable[[], int] = ...,
+    ) -> Incomplete: ...
+    def cancel(self) -> None: ...
+    def still_active(self) -> bool: ...
+
+def is_exiting() -> bool: ...
+
+class ForkAwareThreadLock:
+    acquire: Callable[[bool, float], bool]
+    release: Callable[[], None]
+    def __init__(self) -> None: ...
+    def __enter__(self) -> bool: ...
+    def __exit__(self, *args: object) -> None: ...
+
+class ForkAwareLocal(threading.local):
+    def __init__(self) -> None: ...
+
+MAXFD: int
+
+def close_all_fds_except(fds: Iterable[int]) -> None: ...
+def spawnv_passfds(
+    path: bytes,
+    # args is anything that can be passed to the int constructor
+    args: Sequence[str | ReadableBuffer | SupportsInt | SupportsIndex | SupportsTrunc],
+    passfds: Sequence[int],
+) -> int: ...