Move prerequisite_check before using basename.

Author: jppunnett

ec2-automate-backup/ec2-automate-backup.sh

@@ -133,6 +133,9 @@ purge_EBS_Snapshots() {
   done
 }
 
+#calls prerequisitecheck function to ensure that all executables required for script execution are available
+prerequisite_check
+
 app_name=$(basename $0)
 #sets defaults
 selection_method="volumeid"
@@ -183,9 +186,6 @@ if [[ -z $region ]]; then
   fi
 fi
 
-#calls prerequisitecheck function to ensure that all executables required for script execution are available
-prerequisite_check
-
 #sets date variable
 current_date=$(date -u +%s)