Library /sys$common/syshlp/DFUHLP.HLB

Library /sys$common/syshlp/DFUHLP.HLB
DFU, SET, Qualifiers, /LOCKED
^*Conan The Librarian

  /LOCKED
  /NOLOCKED

   This qualifier will  lock a file  for future use.  Nothing else  can
   then be done with the file, until it is unlocked  (which can also be
   done with the VMS 'UNLOCK' command.

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