Restricting Remote Access

DCSS can use the Blu-Ice's host DISPLAY variable to restrict a user's capabilities based on the user's location and the state of the hutch door. Create a new row with the following format for each display that should be recognized by dcss.

      dcss.display=category hostname display [#Description]

where

• The category can be either 'hutch', 'local', or 'remote'.

• The hostname is the X-windows HOST envionment variable for the machine that Blu-Ice is displaying on. This field is read but not used if the display variable starts with something other than a ':'.

• The display is the X-windows DISPLAY variable for the console that Blu-Ice is displaying on. If the display starts with a ':', then the hostname is used to determine the Blu-Ice client's location.

• The line may optionally add a comment describing the location of the terminal. This comment is broadcast to all of the Blu-Ice clients, further clarifying the location of the GUI.

The dcss.forcedDoor tag is used by dcss to force the hutch door to a particular state. This is useful for beam lines that do not have a dhs that can report the current state of the hutch door. Leaving this tag empty will require a DHS to report the state of the door.

      dcss.forcedDoor=

It is recommended to set this value to "closed" when a DHS is unavailable to report the state. However, this will allow people to move motors remotely regardless of the real state of the hutch door.

      dcss.forcedDoor=closed

For testing, it is also possible to force this state to "open".

      dcss.forcedDoor=open