From 106f4c7ba7c6cffb52bc296e6d1dec2294019d0c Mon Sep 17 00:00:00 2001
From: Thomas Heller <theller@ctypes.org>
Date: Tue, 24 Sep 2002 16:51:00 +0000
Subject: [PATCH] On Windows, call WSAGetLastError() to retrieve the error
 number.

Bugfix candidate, will backport to release22-maint myself.
---
 Modules/selectmodule.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index 2caa0225f4c..8444c12adda 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -39,7 +39,7 @@ extern void bzero(void *, int);
 #endif
 
 #ifdef MS_WINDOWS
-#include <winsock.h>
+#include <windows.h>
 #else
 #ifdef __BEOS__
 #include <net/socket.h>
@@ -273,9 +273,15 @@ select_select(PyObject *self, PyObject *args)
 	n = select(max, &ifdset, &ofdset, &efdset, tvp);
 	Py_END_ALLOW_THREADS
 
+#ifdef MS_WINDOWS
+	if (n == SOCKET_ERROR) {
+		PyErr_SetExcFromWindowsErr(SelectError, WSAGetLastError());
+	}
+#else
 	if (n < 0) {
 		PyErr_SetFromErrno(SelectError);
 	}
+#endif
 	else if (n == 0) {
                 /* optimization */
 		ifdlist = PyList_New(0);