[newlib-cygwin] Cygwin: fhandler_mqueue::mq_open: set all required fhandler flags

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=2b4c7f90d4456f527e2a0d63eb73ebde086a6c13

commit 2b4c7f90d4456f527e2a0d63eb73ebde086a6c13
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Tue May 25 22:43:41 2021 +0200

    Cygwin: fhandler_mqueue::mq_open: set all required fhandler flags
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/fhandler_mqueue.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler_mqueue.cc b/winsup/cygwin/fhandler_mqueue.cc
index f3201883d..6215d7b62 100644
--- a/winsup/cygwin/fhandler_mqueue.cc
+++ b/winsup/cygwin/fhandler_mqueue.cc
@@ -26,7 +26,6 @@ fhandler_mqueue::fhandler_mqueue () :
   fhandler_disk_file ()
 {
   filebuf = (char *) ccalloc_abort (HEAP_BUF, 1, FILESIZE);
-  close_on_exec (true);
 }
 
 fhandler_mqueue::~fhandler_mqueue ()
@@ -144,6 +143,14 @@ out:
   else
     mqinfo = mqinfo_open (oflags & O_NONBLOCK);
   mq_open_finish (mqinfo != NULL, created);
+  /* Set fhandler open flags */
+  if (mqinfo)
+    {
+      set_access (GENERIC_READ | SYNCHRONIZE);
+      close_on_exec (true);
+      set_flags (oflags | O_CLOEXEC, O_BINARY);
+      set_open_status ();
+    }
   return mqinfo ? 1 : 0;
 }