From 3c4d50f8a52406ee3a8847a0b2685363bd2f6422 Mon Sep 17 00:00:00 2001
From: Milas Bowman <milas.bowman@docker.com>
Date: Thu, 16 Feb 2023 13:58:35 -0500
Subject: [PATCH] socket: fix for errors on pipe close in Windows

Need to return data, not size. By returning an empty
string, EOF will be detected properly since `len()`
will be `0`.

Fixes #3098.

Signed-off-by: Milas Bowman <milas.bowman@docker.com>
---
 docker/utils/socket.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker/utils/socket.py b/docker/utils/socket.py
index 5aca30b17d..47cb44f62f 100644
--- a/docker/utils/socket.py
+++ b/docker/utils/socket.py
@@ -49,7 +49,7 @@ def read(socket, n=4096):
         if is_pipe_ended:
             # npipes don't support duplex sockets, so we interpret
             # a PIPE_ENDED error as a close operation (0-length read).
-            return 0
+            return ''
         raise