From d0540e808749ff9f9e90ec5e055168f5f408e51b Mon Sep 17 00:00:00 2001
From: antialias <antialias@leap.se>
Date: Mon, 1 Oct 2012 16:58:39 -0400
Subject: Now throws a CriticalError when an pre-exisiting openvpn istance is
 found.

---
 pkg/requirements.pip              |  1 +
 src/leap/eip/exceptions.py        |  7 +++++++
 src/leap/eip/openvpnconnection.py | 15 ++++++++++++++-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/pkg/requirements.pip b/pkg/requirements.pip
index 5eeabf5c..a958d53f 100644
--- a/pkg/requirements.pip
+++ b/pkg/requirements.pip
@@ -2,5 +2,6 @@ argparse
 configuration
 requests
 ping
+psutil
 netifaces
 python-gnutls==1.1.9  # see https://bugs.launchpad.net/ubuntu/+source/python-gnutls/+bug/1027129
diff --git a/src/leap/eip/exceptions.py b/src/leap/eip/exceptions.py
index f048621f..bb375cf0 100644
--- a/src/leap/eip/exceptions.py
+++ b/src/leap/eip/exceptions.py
@@ -93,6 +93,13 @@ class LeapBadConfigFetchedError(Warning):
     message = "provider sent a malformed json file"
     usermessage = "an error occurred during configuratio of leap services"
 
+
+class OpenVPNAlreadyRunning(EIPClientError):
+    message = "Another OpenVPN Process is already running."
+    usermessage = ("Another OpenVPN Process has been detect it."
+                   "Please close it before starting LEAP")
+
+
 #
 # errors still needing some love
 #
diff --git a/src/leap/eip/openvpnconnection.py b/src/leap/eip/openvpnconnection.py
index f4d1c449..a835ead9 100644
--- a/src/leap/eip/openvpnconnection.py
+++ b/src/leap/eip/openvpnconnection.py
@@ -3,6 +3,7 @@ OpenVPN Connection
 """
 from __future__ import (print_function)
 import logging
+import psutil
 import socket
 import time
 from functools import partial
@@ -87,6 +88,7 @@ to be triggered for each one of them.
 
     def run_openvpn_checks(self):
         logger.debug('running openvpn checks')
+        self._check_if_running_instance()
         self._set_ovpn_command()
         self._check_vpn_keys()
 
@@ -156,9 +158,20 @@ to be triggered for each one of them.
             raise eip_exceptions.EIPNoCommandError
         if self.subp is not None:
             logger.debug('cowardly refusing to launch subprocess again')
-            return
+
         self._launch_openvpn()
 
+    def _check_if_running_instance(self):
+        """
+        check if openvpn is already running
+        """
+        for process in psutil.get_process_list():
+            if process.name == "openvpn":
+                logger.debug('an openvpn instance is already running.')
+                raise eip_exceptions.OpenVPNAlreadyRunning
+
+        logger.debug('no openvpn instance found.')
+
     def cleanup(self):
         """
         terminates child subprocess
-- 
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