From ecf061e6b6a4334154ce67eb3253c004d4d2c2ea 2012-11-13 10:36:52
From: Bussonnier Matthias <bussonniermatthias@gmail.com>
Date: 2012-11-13 10:36:52
Subject: [PATCH] Merge pull request #2526 from minrk/setpgrp

Don't kill paramiko tunnels when receiving ^C
---

diff --git a/IPython/external/ssh/tunnel.py b/IPython/external/ssh/tunnel.py
index 9ae2311..c63f0ce 100644
--- a/IPython/external/ssh/tunnel.py
+++ b/IPython/external/ssh/tunnel.py
@@ -22,6 +22,7 @@ Authors
 from __future__ import print_function
 
 import os,sys, atexit
+import signal
 import socket
 from multiprocessing import Process
 from getpass import getpass, getuser
@@ -331,9 +332,10 @@ def _paramiko_tunnel(lport, rport, server, remoteip, keyfile=None, password=None
     except Exception as e:
         print ('*** Failed to connect to %s:%d: %r' % (server, port, e))
         sys.exit(1)
-
-    # print ('Now forwarding port %d to %s:%d ...' % (lport, server, rport))
-
+    
+    # Don't let SIGINT kill the tunnel subprocess
+    signal.signal(signal.SIGINT, signal.SIG_IGN)
+    
     try:
         forward_tunnel(lport, remoteip, rport, client.get_transport())
     except KeyboardInterrupt: