From d888ac6b277e2ff5feb8610bbdc8ae775cef56e5 Mon Sep 17 00:00:00 2001
From: Iain Patterson <me@iain.cx>
Date: Thu, 9 Dec 2010 13:47:03 +0000
Subject: [PATCH] Fixed override of KRB5CCNAME when attaching.

Because KRB5CCNAME was set in update-environment, when attaching
to a running session the saved KRB5CCNAME would be replaced with
that from the attaching user.  This conflicts with the cache used
by ktmux_helper.

Instead, use set-environment to put KRB5CCNAME in the session
environment and kinit with it before running tmux.
---
 .tmux.conf    | 3 ---
 opt/bin/ktmux | 9 ++++++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/.tmux.conf b/.tmux.conf
index 2701393..f46cae1 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -9,9 +9,6 @@ set -g status-keys vi
 # Don't wait so long to parse escape sequences.
 set -s escape-time 100
 
-# Ensure KRB5CCNAME is preserved in the environment.
-set -a -g update-environment ' KRB5CCNAME'
-
 # Clock.
 setw -g clock-mode-colour white
 setw -g clock-mode-style 24
diff --git a/opt/bin/ktmux b/opt/bin/ktmux
index d0c063c..eb590da 100755
--- a/opt/bin/ktmux
+++ b/opt/bin/ktmux
@@ -11,4 +11,11 @@ while getopts ":T:n:s:t:" opt; do
 done
 shift $((OPTIND-1))
 
-exec $tmux ${tmux_opts## } new-session ${session_opts## } -d ';' attach ';' run-shell ktmux_helper
+if [ -z "$KRB5CCNAME" ]; then
+  krb5ccname="$KRB5CCNAME"
+  [ -z "$krb5ccname" ] && krb5ccname=FILE:${TMPDIR:-/tmp}/krb5cc_${UID}_ktmux_$$
+  export KRB5CCNAME="$krb5ccname"
+fi
+klist -s || kinit
+
+exec $tmux ${tmux_opts## } new-session ${session_opts## } -d ';' set-environment KRB5CCNAME "$KRB5CCNAME" ';' attach ';' run-shell ktmux_helper
-- 
2.7.4