redirect_edit_form_validate in modules/redirect/redirect.admin.inc

Form validate handler; validate an URL redirect

RedirectFunctionalTest::testPathChangeRedirects in modules/redirect/tests/redirect.test

Tests renaming automatic aliases in a circular loop.

redirect_get_current_redirect in modules/redirect/redirect.module

Attempt to find redirect from current path, query string, and language code.

redirect_path_delete in modules/redirect/redirect.module

Implements hook_path_delete().

redirect_path_insert in modules/redirect/redirect.module

Implements hook_path_insert().

redirect_path_update in modules/redirect/redirect.module

Implements hook_path_update().

redirect_url_inbound_alter in modules/redirect/redirect.module

Implements hook_url_inbound_alter().