Merge "Fail if run in POSIX compatability mode"
diff --git a/stack.sh b/stack.sh
index 2060f2d..615b77f 100755
--- a/stack.sh
+++ b/stack.sh
@@ -21,6 +21,13 @@
# Learn more and get the most recent version at http://devstack.org
+# check if someone has invoked with "sh"
+if [[ "${POSIXLY_CORRECT}" == "y" ]]; then
+ echo "You appear to be running bash in POSIX compatability mode."
+ echo "devstack uses bash features. \"./stack.sh\" should do the right thing"
+ exit 1
+fi
+
# Make sure custom grep options don't get in the way
unset GREP_OPTIONS