oracle apps disable or enable maintenance mode in non interactive mode in oracle applications R12

To enable maintenance mode:

$ cd $AD_TOP/patch/115/sql
$ sqlplus apps/apps
$ @adsetmmd.sql enable;

To disable maintenance mode :

$ cd $AD_TOP/patch/115/sql
$ sqlplus apps/apps
$ @adsetmmd.sql disable;

To enable or disable maintenance mode  using adadmin

http://learnappsdbaskills.blogspot.in/2013/04/disable-maintenance-mode.html