From c911c50518c083afcf5a374284576e23c58857ec 2013-04-24 04:47:51
From: MinRK <benjaminrk@gmail.com>
Date: 2013-04-24 04:47:51
Subject: [PATCH] close fds when spawning qtconsole subprocess

avoids lingering connections to zmq sockets across kernel restart

---

diff --git a/IPython/kernel/connect.py b/IPython/kernel/connect.py
index 9c9a97e..0a431df 100644
--- a/IPython/kernel/connect.py
+++ b/IPython/kernel/connect.py
@@ -304,7 +304,9 @@ def connect_qtconsole(connection_file=None, argv=None, profile=None):
         "qtconsoleapp.main()"
     ])
     
-    return Popen([sys.executable, '-c', cmd, '--existing', cf] + argv, stdout=PIPE, stderr=PIPE)
+    return Popen([sys.executable, '-c', cmd, '--existing', cf] + argv,
+        stdout=PIPE, stderr=PIPE, close_fds=True,
+    )
 
 
 def tunnel_to_kernel(connection_info, sshserver, sshkey=None):