update_bareos_tables: show update warning only once

src/cats/update_bareos_tables.in

@@ -36,6 +36,8 @@ temp_sql_schema="/tmp/tables.sql.$$"
 default_db_type=`get_database_driver_default`
 working_dir=`get_working_dir`
 
+SHOW_WARNING="yes"
+
 if [ "$1" = "-f" ]; then
    FORCE="yes"
    shift || true
@@ -139,13 +141,15 @@ do
       exit 1
    fi
 
-   if [ ${DBVERSION} -lt 2170 ]; then
+   if [ "${SHOW_WARNING}" = "yes" -a ${DBVERSION} -lt 2171 ]; then
       echo "WARNING:"
-      echo "  Updating the database to schema version 2170 will increase the required disk space."
+      echo "  Updating the database to schema version 2171 will increase the required disk space."
       echo "  Especially it will require around twice the amount of disk space, during the migration."
       if [ "$FORCE" != "yes" ]; then
          echo "  Please verfiy you got enough disk space available and confirm by pressing <ENTER>."
          read input
+         # warning already shown and confirmed. No need to show it again.
+         SHOW_WARNING="no"
       fi
    fi