From 50e59aee4491c03340cab1e2b56ff80fe9a41ed3 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 9 Aug 2017 15:00:05 +0200
Subject: [PATCH 1/2] actually set sticky bit

use new_permissions, not old!
---
 jupyter_client/connect.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jupyter_client/connect.py b/jupyter_client/connect.py
index afe197688..dd359c907 100644
--- a/jupyter_client/connect.py
+++ b/jupyter_client/connect.py
@@ -148,7 +148,7 @@ def write_connection_file(fname=None, shell_port=0, iopub_port=0, stdin_port=0,
             new_permissions = permissions | stat.S_ISVTX
             if new_permissions != permissions:
                 try:
-                    os.chmod(path, permissions)
+                    os.chmod(path, new_permissions)
                 except OSError as e:
                     # failed to set sticky bit,
                     # probably not a big deal

From 02bd87703ca47b291f0f329af3cf8a9e7e0b2124 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 9 Aug 2017 15:04:39 +0200
Subject: [PATCH 2/2] suppress permission error setting sticky bit on
 runtime_dir

may not be permitted when using temporary files on some platforms

and soften warning, explaining consequences.
---
 jupyter_client/connect.py | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/jupyter_client/connect.py b/jupyter_client/connect.py
index dd359c907..9f629c143 100644
--- a/jupyter_client/connect.py
+++ b/jupyter_client/connect.py
@@ -10,6 +10,7 @@
 
 from __future__ import absolute_import
 
+import errno
 import glob
 import json
 import os
@@ -150,12 +151,17 @@ def write_connection_file(fname=None, shell_port=0, iopub_port=0, stdin_port=0,
                 try:
                     os.chmod(path, new_permissions)
                 except OSError as e:
-                    # failed to set sticky bit,
-                    # probably not a big deal
-                    warnings.warn(
-                        "Failed to set sticky bit on %r: %s" % (path, e),
-                        RuntimeWarning,
-                    )
+                    if e.errno == errno.EPERM and path == runtime_dir:
+                        # suppress permission errors setting sticky bit on runtime_dir,
+                        # which we may not own.
+                        pass
+                    else:
+                        # failed to set sticky bit, probably not a big deal
+                        warnings.warn(
+                            "Failed to set sticky bit on %r: %s"
+                            "\nProbably not a big deal, but runtime files may be cleaned up periodically." % (path, e),
+                            RuntimeWarning,
+                        )
 
     return fname, cfg