How to extend frontend core controller...

Hi,

 

Is it possible to extend the Shopware\Controllers\Frontend\Listing\indexAction? I would like to add some logic, in one case I would like to skip some validation steps, but when not needed I would like to use the code from the parent controller.

I am trying to create an url for the root category to show the full catalog. => www.domain.com/allproducts

 

Best regards