dzdo.requiretty

This configuration parameter specifies whether a user needs to be logged in to a valid tty session in order to run dzdo. If you set this parameter to true, this means that the user can run dzdo only from a login session and not from a cgi-bin or cron(8) script.

By default, this parameter is set to false so that it's not required to run a tty session in order to run dzdo.