F I X   --   FIX LOCKED FILES
 
 
1.	A FILE BECOMES LOCKED IF A TASK WHICH HAS WRITE OR EXTEND
 
	ACCESS IS ABORTED.  THE ONLY LEGAL OPERATIONS ON A LOCKED
 
	FILE ARE DELETE OR UNLOCK.
 
 
2.	FILES MAY BE LOCKED IN ANY OF THREE STATES, EMPTY, NOT EMPTY
 
	BUT POSSIBLY INCOMPLETE, OR UNCORRUPTED.  THE LOCKED STATE
 
	MAY BE DETERMINED BY LOOKING AT THE BLOCKS USED AND ALLOCATED
 
	FIELD IN A FULL DIRECTORY LIST ( THE N./M. FIELD - N. IS BLOCKS
 
	USED, M. IS BLOCKS ALLOCATED).
 
	THE STATES ARE AS FOLLOWS:
 
			EMPTY		0./0.
 
			NOT EMPTY	0./M.
 
			UNCORRUPTED	N./M.
 
 
3.	EMPTY FILES ARE USELESS AND SHOULD BE DELETED.
 
	UNCORRUPTED FILES CAN BE RESTORED BY UNLOCKING.
 
 
4.	THAT PORTION OF A NON-EMPTY FILE WHICH WAS WRITTEN ON DISK
 
	MAY BE RESTORED BY THE FOLLOWING:
 
	  PDS> RUN LB:[2,2]FIX
 
	  FIX> FILENAME.EXT [;VERSION] [/ED] [/RL:SIZE]
 
	  FIX> ENTER ANOTHER FILE OR CTRL-Z TO EXIT
 
	THE FILE WILL THEN BE READABLE. SOME DATA, HELD IN THE FCS
 
	BUFFERS AT THE TIME OF THE ABORT, MAY BE MISSING.
 
5.	FIX WILL UNLOCK THE FILE AND ATTEMP TO UPDATE THE FILE
 
	ATTRIBUTES. FILES WITH VARIABLE LENGTH RECORDS - FILES
 
	CREATED BY THE EDITOR AND FORTRAN SEQUENTIAL FILES HAVE
 
	VARIABLE LENGTH RECORDS - ARE SCANNED BY FIX TO FIND THE
 
	LAST 'GOOD' RECORD. A 'GOOD' RECORD IS ONE WHICH HAS A
 
	LENGTH LESS THAN SOME MAXIMUM LIMIT. THE MAXIMUM LIMIT
 
	DEFAULTS TO 150. BYTES, BUT MAY ME MODIFIED BY USING THE
 
	/ED OR /RL:LENGTH QUALIFIERS.
 
 
	  /ED (EDITOR SIZE) SETS THE MAXIMUM LIMIT TO 80. BYTES
 
	  /RL:LENGTH 	    SETS THE MAX TO 'LENGTH' (DECIMAL) BYTES
 
 
	USE OF THE /RL OR /ED QUALIFIERS WILL REDUCE THE POSSIBILITY
 
	THAT FIX WILL INCORRECTLY INTERPRET GARBAGE DATA AS VALID
 
	RECORD HEADERS.