From 712b265a162e8f877859acee25ce74402eaa1d62 Mon Sep 17 00:00:00 2001
From: Arnav Singh <me@arnavion.dev>
Date: Thu, 25 Aug 2022 21:50:01 -0700
Subject: [PATCH] Fix os.{,p}{read,write}v to take Sequence of ReadableBuffer /
 WriteableBuffer (#8617)

Fixes #8615
Fixes #8616
---
 stdlib/os/__init__.pyi | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/stdlib/os/__init__.pyi b/stdlib/os/__init__.pyi
index e3d428555..a7567caca 100644
--- a/stdlib/os/__init__.pyi
+++ b/stdlib/os/__init__.pyi
@@ -9,9 +9,12 @@ from _typeshed import (
     OpenBinaryModeUpdating,
     OpenBinaryModeWriting,
     OpenTextMode,
+    ReadableBuffer,
     Self,
     StrOrBytesPath,
     StrPath,
+    SupportsLenAndGetItem,
+    WriteableBuffer,
     structseq,
 )
 from abc import abstractmethod
@@ -624,8 +627,8 @@ if sys.platform != "win32":
     if sys.platform != "darwin":
         if sys.version_info >= (3, 10):
             RWF_APPEND: int  # docs say available on 3.7+, stubtest says otherwise
-        def preadv(__fd: int, __buffers: Iterable[bytes], __offset: int, __flags: int = ...) -> int: ...
-        def pwritev(__fd: int, __buffers: Iterable[bytes], __offset: int, __flags: int = ...) -> int: ...
+        def preadv(__fd: int, __buffers: SupportsLenAndGetItem[WriteableBuffer], __offset: int, __flags: int = ...) -> int: ...
+        def pwritev(__fd: int, __buffers: SupportsLenAndGetItem[ReadableBuffer], __offset: int, __flags: int = ...) -> int: ...
         RWF_DSYNC: int
         RWF_SYNC: int
         RWF_HIPRI: int
@@ -642,8 +645,8 @@ if sys.platform != "win32":
         trailers: Sequence[bytes] = ...,
         flags: int = ...,
     ) -> int: ...  # FreeBSD and Mac OS X only
-    def readv(__fd: int, __buffers: Sequence[bytearray]) -> int: ...
-    def writev(__fd: int, __buffers: Sequence[bytes]) -> int: ...
+    def readv(__fd: int, __buffers: SupportsLenAndGetItem[WriteableBuffer]) -> int: ...
+    def writev(__fd: int, __buffers: SupportsLenAndGetItem[ReadableBuffer]) -> int: ...
 
 @final
 class terminal_size(structseq[int], tuple[int, int]):