FORD AEROSPACE & COMMUNICATION CORP.

			IN COOPERATION WITH:

			NASA/JSC BUILDING 37,
			LIFE SCIENCES MEDICAL OPERATIONS
			HOUSTON, TEXAS  77058.


			ATTENTION:

			WILLIAM BAKER
			SYSTEM MANAGER

			713-483-5353


	THE SETUSER FUNCTION ALLOWS A PERSON WITH CMKRNL AND SYSPRV TO
	MODIFY THE PROCESS USERNAME TO THAT OF ANY OTHER VALID USERNAME.
	THIS IS NOT THE SAME AS PERFORMING A 'SET PROCESS/NAME=' VMS
	COMMAND.  THIS PROGRAM CHANGES YOUR SYSTEM ATTRIBUTES SUCH THAT
	THE SYSTEM THINKS YOU ARE THAT USER.  AS SUCH YOU THEN HAVE
	ACCESS TO ALL FILES THAT USER WOULD HAVE ACCESS TO, INCLUDING MAIL.


	THE COMMAND FILE IS GENERALLY INVOKED BY DEFINING A SYMBOL, 'SETUSER'.
	THE SYNTAX IS AS FOLLOWS:

		SETUSER username [-sd]

	THE username IS THE USERNAME THAT YOU WISH TO EMULATE.  THE -sd
	IS AN OPTIONAL PARAMETER THAT ALLOWS YOU SET YOUR DEFAULT DIRECTORY
	TO THAT USERS DEFAULT DIRECTORY.


	THIS PROGRAM USES THE 'SYS_UAFDATA' DATAFILE FOR ITS VALIDATION OF
	USERNAME AND SETTING OF THE UIC AND/OR DIRECTORY.  YOU MUST DEFINE
	THE LOGICAL AT THE SYSTEM LEVEL SYS_UAFDATA AS FOLLOWS:

		DEFINE/SYSTEM/EXEC SYS_UAFDATA	SYS$SYSTEM:SYSUAF.DAT

	THIS PROGRAM (OR THE OLD) IS USED WITH THE [.MAILLIB] COMMAND
	PROCEDURE THAT COMPRESSES USER'S MAIL FILE.  IT IS ALSO USED BY
	THIS SYSTEM MANAGER TO SET THE MAIL_DIRECTORY TO [.MAIL] FROM 
	THE TOP DIRECTORY FOR ALL NEW USERS ON THE SYSTEM.  ON OUR SYSTEM, 
	THE [.MAIL] SUB-DIRECTORY IS USED AS THE SYS$SCRATCH DIRECTORY FOR 
	MANY FUNCTIONS THAT THE USERS INVOKE.