; FILEZAP
;---------------------------------------------------------------
;! Delete an external file
;# VERB GENERAL FITS
;-----------------------------------------------------------------------
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;;  Associated Universities, Inc. Washington DC, USA.
;;
;;  This program is free software; you can redistribute it and/or
;;  modify it under the terms of the GNU General Public License as
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;;
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;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;  GNU General Public License for more details.
;;
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;;  License along with this program; if not, write to the Free
;;  Software Foundation, Inc., 675 Massachusetts Ave, Cambridge,
;;  MA 02139, USA.
;;
;;  Correspondence concerning AIPS should be addressed as follows:
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;;         Postal address: AIPS Project Office
;;                         National Radio Astronomy Observatory
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;-----------------------------------------------------------------------
FILEZAP   LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
FILEZAP: Verb to destroy an external file
DOCONFRM       -1.0         1.0    > 0 require confirmation
ERROR    @     -1.0         1.0    > 0 => verb had an error

         File name to be zapped is an immediate argument
              e.g.   FILEZAP 'MYAREA:SOURCE.BOX'
                     FILEZAP OBOXFILE
----------------------------------------------------------------
FILEZAP
Type: Verb
Use:  FILEZAP is a verb to delete the subsidiary input and output
      files identified in AIPS with adverbs such as DATAIN, DATAOUT,
      INFILE, IN2FILE, OUTFILE, OUTPRINT, BOXFILE, OBOXFILE, INTEXT,
      OUTTEXT, etc.  The file to be deleted is provided as an
      immediate argument which can be either a string adverb or a
      quoted string.  The value of this string is in the usual form
      which is described in detail in HELP INFILE.  Examples are
                  FILEZAP 'MYAREA:source.box'
                  FILEZAP 'MYAREA:source.box
                  OUTFILE = 'FITS:JUNK.FITS'
                  FILEZAP OUTFILE
      Note that the close quote changes the string to all upper case
      letters.  Thus to delete source.box in my directory pointed to
      by $MYAREA, I must make the FILEZAP command be the last on the
      input line and I must omit the close quote as in the 2nd example
      above.  The first example deletes SOURCE.BOX.

Input adverbs:
  DOCONFRM.....> 0 => that you will be asked to confirm the deletion
               before it occurs.  Answer yes or no either all in upper
               or all in lower case letters.  <= 0 => that you had
               better choose the immediate argument carefully before
               hitting carriage return
Output adverbs:
  ERROR   .....= 1 => an error occurred in the operation, including
               that the file did not exist
               = -1 => no error occurred and the file has been deleted
----------------------------------------------------------------