9 uses of MENU_SITE_OFFLINE

ajax_prepare_response in includes/ajax.inc
Converts the return value of a page callback into an Ajax commands array.
drupal_deliver_html_page in includes/common.inc
Packages and sends the result of a page callback to the browser as HTML.
drupal_site_offline in includes/common.inc
Delivers a "site is under maintenance" message to the browser.
hook_menu_site_status_alter in modules/system/system.api.php
Control site status before menu dispatching.
menu_execute_active_handler in includes/menu.inc
Execute the page callback associated with the current path.
menu_test_menu_site_status_alter in modules/simpletest/tests/menu_test.module
Implements hook_menu_site_status_alter().
openid_menu_site_status_alter in modules/openid/openid.module
Implements hook_menu_site_status_alter().
openid_test_menu_site_status_alter in modules/openid/tests/openid_test.module
Implements hook_menu_site_status_alter().
user_menu_site_status_alter in modules/user/user.module
Implements hook_menu_site_status_alter().

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.