pc-su. You can read a little about this in the Handbook for 10.2, and in the forums:
Both "sudo" and "pc-su" are used in different situations:
pc-su: This simple script simply looks for an available GRAPHICAL utility that can be used for switching user permissions. Some of the utilities that it looks for are: kdesu (for KDE desktops), gksu (for GNOME/XFCE desktops), and qsu (which is a Qt switch-user utility that was written just for PC-BSD). This is generally only used when you are graphically starting up an application that required administrator privileges (like a PBI from the application menu for instance) since we do not want to require command-line usage for graphical operations.
sudo: This is used only in scripts and/or command line application initializations because it either depends upon user input into the terminal or does not require a password at all (a couple of our utilities are setup this way, like the mounttray and life-preserver).
So both "pc-su" and "sudo" are perfectly valid methods of switching user permissions, they just have different use-cases on a PC-BSD system.
~ Ken Moore ~
$ freebsd-version ; man pc-su
No manual entry for pc-su