testing_project/Documentation: reference/reference_lua/box_session/on_access_denied — English @ Weblate: tarantool> function on_access_denied(op, type, name)

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English

tarantool> function on_access_denied(op, type, name)
         > log.warn('User %s tried to %s %s %s without required privileges', box.session.user(), op, type, name)
         > end
---
...
tarantool> box.session.on_access_denied(on_access_denied)
---
- 'function: 0x011b41af38'
...
tarantool> function test() print('you shall not pass') end
---
...
tarantool> box.schema.func.create('test')
---
...

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	English	Actions
	box.session.on_access_denied()
	Define a trigger for reacting to user's attempts to execute actions that are not within the user's privileges.
	Parameters
	function which will become the trigger function
	existing trigger function which will be replaced by trigger-function
	return
	nil or function pointer
	If the parameters are (nil, old-trigger-function), then the old trigger is deleted.
	If both parameters are omitted, then the response is a list of existing trigger functions.
	Details about trigger characteristics are in the :ref:`triggers <triggers-box_triggers>` section.
	Example:
	For example, server administrator can log restricted actions like this:
	tarantool> function on_access_denied(op, type, name) > log.warn('User %s tried to %s %s %s without required privileges', box.session.user(), op, type, name) > end --- ... tarantool> box.session.on_access_denied(on_access_denied) --- - 'function: 0x011b41af38' ... tarantool> function test() print('you shall not pass') end --- ... tarantool> box.schema.func.create('test') --- ...
	Then, when some user without required privileges tries to call ``test()`` and gets the error, the server will execute this trigger and write to log *"User user_name* tried to Execute function test without required privileges"**

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