Add simulation mode without any modifications

cluster/maco.check.update.sh

@@ -17,10 +17,14 @@ readonly NBARGS="${#}"
 ## Export DEBUG for sub-script
 export DEBUG
 
+# If output message should be displayed
 [ -z "${OUTPUT_MESSAGE}" ] && OUTPUT_MESSAGE=0
 ## Export OUTPUT_MESSAGE for sub-script
 export OUTPUT_MESSAGE
 
+# If modifications should be applied
+[ -z "${SIMULATE_MODE}" ] && SIMULATE_MODE=1
+
 ## Colors
 readonly PURPLE='\033[1;35m'
 readonly RED='\033[0;31m'
@@ -156,11 +160,16 @@ prepare_host_for_upgrade() {                                    # {{{
 
 	disable_host_queue_script="${PROGDIR}/disable.host.queue.sh"
 
-	debug_message "prepare_host_for_upgrade − \
-Disable SGE queue."
-	sh "${disable_host_queue_script}"
+	if [ "${SIMULATE_MODE}" -eq 0 ]; then
+		return 0
+	else
 
-	return "${?}"
+		debug_message "prepare_host_for_upgrade − \
+Disable SGE queue."
+		sh "${disable_host_queue_script}"
+
+		return "${?}"
+	fi
 
 }
 # }}}
@@ -218,9 +227,9 @@ if [ ! "${NBARGS}" -eq "0" ]; then
 			## Avoid to display any message on standard output
 			OUTPUT_MESSAGE=1
 			;;
-		-s|--silent ) ## Silent mode
-			## Avoid to display any message on standard output
-			OUTPUT_MESSAGE=1
+		-s|--simulate ) ## Simulate mode
+			## Only display messages
+			SIMULATE_MODE=0
 			;;
 		-- )         ## End of options list
 			## End the while loop