Type ASSEMBLE
Source Lines : 2,825
Fixes Applied : 6
Most Recent Version : Tuesday, December 12, 1978
Last Fix ID : [HRC380DS]
Module
DMSSVT
Function
DMSSVT PROCESSES OS MACROES.
Attributes
SERIALLY REUSABLE, TRANSIENT
Operation
KEYSAV GETS CONTROL FROM EITHER DMSSBD OR THE CLOSE
ROUTINE, DMSSOP.
. IF KEYSAV GETS CONTROL FROM DMSSBD, A KEY TABLE
AND A PLIST FOR
ACCESSING THE KEY TABLE IS BUILT IN CORE. NEXT,
THE XTENT PARAMETER IS READ FROM THE LAST ITEM IN
THE DATA FILE AND IF THE FILE FORMAT IS FIXED OR IF
THE FILE IS NOT BEING UPDATED, CONTROL IS RETURNED
TO DMSSBD. OTHERWISE
TWO NEW FILES WITH THE SAME FILETYPE AS THE DATA
FILE, BUT WITH FILENAMES OF $KEYTEMP AND $KEYSAVE
ARE CREATED, USING THE KEYS AT THE END OF THE DATA
FILE. THE $KEYTEMP FILE WILL BE USED FOR UPDATES
TO THE KEYS, AND THE $KEYSAVE FILE WILL BE USED IN
CASE OF A SYSTEM CRASH OR RE-IPL. IF A $KEYSAVE
FILE ALREADY EXISTS FOR A DATA FILE WHEN IT IS
OPENED, THEN THE KEYS FROM THAT FILE RATHER THAN
THE KEYS FROM THE END OF THE DATA FILE, WILL BE
USED TO CREATE $KEYTEMP. AFTER THE TWO FILES ARE
CREATED, CONTROL
IS RETURNED TO DMSSBD.
. IF KEYSAV GETS CONTROL FROM DMSSOP, THEN KEYS FROM
THE LAST KEY TABLE REFERRENCED ARE SAVED. IF THE FILE
FORMAT IS FIXED OR IF THE FILE WAS NOT UPDATED,
THE CORE FOR THE KEY TABLE AND KEY PLIST IS FREED
AND CONTROL IS RETURNED TO DMSSBD. OTHERWISE, THE
$KEYTEMP FILE ARE READ IN AND WRITTEN AT THE END
OF THE DATA FILE. WHEN THIS IS COMPLETE, THE
$KEYTEMP AND $KEYSAVE FILES ARE ERASED, THE CORE
FOR THE KEY TABLE AND ITS PLIST IS FREED UP, AND
CONTROL
IS RETURNED TO DMSSOP.
Calls to Other Routines
DMSERR,DMSSTT,DMSDBD,DMSBWR,DMSBRD,DMSFNS,DMSERS,DMSFRE,
DMSADL,DMSUFD,DMSSBDFR,DMSCRD,DMSCWR,GETMAIN,FREEMAIN,
NOTE, TIME, DMSKEY, DMSROS