From 68446b55344aba3eea43b6e90c5aaab32ec968d1 2014-02-28 20:47:51
From: MinRK <benjaminrk@gmail.com>
Date: 2014-02-28 20:47:51
Subject: [PATCH] set SO_LINGER=0 during port selection

might prevent EADDRINUSE errors in tests
---

diff --git a/IPython/kernel/connect.py b/IPython/kernel/connect.py
index f889ab9..dc30063 100644
--- a/IPython/kernel/connect.py
+++ b/IPython/kernel/connect.py
@@ -109,6 +109,7 @@ def write_connection_file(fname=None, shell_port=0, iopub_port=0, stdin_port=0, 
     if transport == 'tcp':
         for i in range(ports_needed):
             sock = socket.socket()
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, b'\0' * 8)
             sock.bind(('', 0))
             ports.append(sock)
         for i, sock in enumerate(ports):