From b30b75ebc5a48cc03287123a9529aecb05ca1ad3 Mon Sep 17 00:00:00 2001
From: Alexey Kotlyarov <a@koterpillar.com>
Date: Mon, 21 Dec 2015 13:32:13 +1100
Subject: [PATCH] Do not pass open file descriptors to Xvfb

Explicitly pass close_fds=True so that Xvfb does not inherit the open file descriptors of the calling process.
---
 xvfbwrapper.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xvfbwrapper.py b/xvfbwrapper.py
index f8cbce4..143c248 100644
--- a/xvfbwrapper.py
+++ b/xvfbwrapper.py
@@ -50,7 +50,8 @@ class Xvfb:
         with open(os.devnull, 'w') as fnull:
             self.proc = subprocess.Popen(self.xvfb_cmd,
                                          stdout=fnull,
-                                         stderr=fnull)
+                                         stderr=fnull,
+                                         close_fds=True)
         time.sleep(0.2)  # give Xvfb time to start
         ret_code = self.proc.poll()
         if ret_code is None: