From 0c545f3264aaaac3d02d3ef785a2e2e9d77ed03f Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Tue, 8 Jan 2019 18:50:11 +0100
Subject: [PATCH] Cygwin: open: handle O_CLOEXEC when opening file from handle

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
---
 winsup/cygwin/fhandler.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index 9f5e0094f..9af08d735 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -555,7 +555,11 @@ fhandler_base::open (int flags, mode_t mode)
   /* Allow to reopen from handle.  This is utilized by
      open ("/proc/PID/fd/DESCRIPTOR", ...); */
   if (get_handle ())
-    pc.init_reopen_attr (attr, get_handle ());
+    {
+      pc.init_reopen_attr (attr, get_handle ());
+      if (!(flags & O_CLOEXEC))
+	attr.Attributes |= OBJ_INHERIT;
+    }
   else
     pc.get_object_attr (attr, *sec_none_cloexec (flags));