From f8c64c4f27a4d57dd3dbfd25c0d39a025960f7af Mon Sep 17 00:00:00 2001
From: Yaroslav Halchenko <debian@onerussian.com>
Date: Wed, 8 Jul 2015 08:54:56 -0400
Subject: [PATCH] ssh_filter_btrbk: fail if any command fails, or var is
 undefined

---
 ssh_filter_btrbk.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
 mode change 100644 => 100755 ssh_filter_btrbk.sh

diff --git a/ssh_filter_btrbk.sh b/ssh_filter_btrbk.sh
old mode 100644
new mode 100755
index ed24614..9e5746d
--- a/ssh_filter_btrbk.sh
+++ b/ssh_filter_btrbk.sh
@@ -1,8 +1,12 @@
 #!/bin/sh
 
+set -e
+set -u
+
 export PATH=/sbin:/bin:/usr/sbin:/usr/bin
 
-if [ "$1" = "-l" ]; then
+enable_log=
+if [ "$#" -ge 1 ] && [ "$1" = "-l" ]; then
     enable_log=1
 fi