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EOF command

The EOF command writes an end-of-file mark on the  specified  magnetic
tape.  Use this command for unlabeled tapes only.


Format

     @EOF (DEVICE) dev:

     where:

     dev:      is the name of the magnetic tape  drive  on  which  you
               want to write an end-of-file mark.  The colon after the
               device name is optional.

Hints

     EOF Seldom Needed

          Because tape-writing  programs  and  commands  automatically
          write  end-of-file  marks  in the appropriate places, you do
          not ordinarily need the EOF command.  But it can  be  useful
          if  such  a  program  is interrupted (by your CTRL/C or by a
          system failure and restart) and you  want  to  preserve  the
          information already written.  Also, you can shorten files on
          an existing tape by giving an EOF  command  at  the  desired
          point.


Restrictions

     EOF With Open Files

          If you have given a CTRL/C to exit from a program  that  has
          opened  a  magnetic  tape  drive  and  you then give the EOF
          command for that tape drive, the system will first allow you
          to  close  the  associated file.  You must do so for the EOF
          command to succeed, but  you  will  probably  be  unable  to
          continue  the program from that point, because the file will
          now be closed.


Related Commands

             ---
     BACKSPACE |
               |
     REWIND    |
               |   other TOPS-20 commands for controlling magnetic
               |   tape drives
     SKIP      |
               |
     UNLOAD    |
             ---


Examples

     1.  Put an end-of-file mark (EOF) on your magnetic tape.

         @EOF MTA0: