From 5930dca459bb34aad658dffc18203e05c179edc0 Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Sun, 4 Oct 2020 10:18:54 -0400
Subject: [PATCH] Cygwin: AF_UNIX: socket: set the O_RDWR flag

---
 winsup/cygwin/fhandler_socket_unix.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/cygwin/fhandler_socket_unix.cc b/winsup/cygwin/fhandler_socket_unix.cc
index 429aa8a90..0ae7fe125 100644
--- a/winsup/cygwin/fhandler_socket_unix.cc
+++ b/winsup/cygwin/fhandler_socket_unix.cc
@@ -1366,6 +1366,7 @@ fhandler_socket_unix::socket (int af, int type, int protocol, int flags)
   wmem (262144);
   set_addr_family (AF_UNIX);
   set_socket_type (type);
+  set_flags (O_RDWR | O_BINARY);
   if (flags & SOCK_NONBLOCK)
     set_nonblocking (true);
   if (flags & SOCK_CLOEXEC)