commit 44b5736d23aa544ea4ac1c9feadd4724b18102be
author Chmouel Boudjnah <chmouel@chmouel.com> Tue Feb 07 18:13:44 2012 +0100
committer Vishvananda Ishaya <vishvananda@gmail.com> Wed Feb 08 22:05:48 2012 +0000
tree b40fad25084d7b7b0ee00e8da7f4125d54c419af
parent af6d47cb3da92df0a49adbad1d4c9d4f50124147

Check if screen is installed before using it.

Fixes 928377

Change-Id: Ie34860e6d08a457dd52a6c3106d63b54c284f6f3

stack.sh

diff --git a/stack.sh b/stack.sh
index c40b24c..093d5d8 100755
--- a/stack.sh
+++ b/stack.sh
@@ -90,7 +90,7 @@
 DEST=${DEST:-/opt/stack}
 
 # Check to see if we are already running a stack.sh
-if screen -ls | egrep -q "[0-9].stack"; then
+if type -p screen >/dev/null && screen -ls | egrep -q "[0-9].stack"; then
     echo "You are already running a stack.sh session."
     echo "To rejoin this session type 'screen -x stack'."
     echo "To destroy this session, kill the running screen."