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

  /CONFIRM
  /NOCONFIRM (default)

   Controls whether a  request is issued before each individual SET
   operation  to confirm that the operation should be performed on that
   file.

   When the system issues the prompt, issue any of the following responses:

        YES      NO     QUIT

        TRUE     FALSE  <CTRL/Z>

        1        0      ALL

                 <RET>
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