FILCMP is a program to compare  two  files  and  report  on  the  differences
   between  them.   Also,  if desired, these differences can be used to update a
   3rd file (see the UPDATE command).

   FILCMP>? A command, one of the following:
    COMPARE       EXIT          HELP     INFORMATION    SET
    TAKE          UPDATE

   During an COMPARE or UPDATE command the following control characters  may  be
   used:
          ^A    -Gives the current status of COMPARE or UPDATE.   It  gives  the
                 number  of  changes  found,  the  current disk page the file is
                 processing and the percentage of each file processed.
          ^E    -Aborts the COMPARE or UPDATE command
          ^X    -Aborts the COMPARE or UPDATE command.  It differs from ^E  only
                 if  wildcards  had  been used in the file specs for the COMPARE
                 command - ^X aborts only the current comparison while  ^E  will
                 abort all comparisons.

COMPARE (older file) __ (against newer file) __ (outputing differences to) __

   Compares one file with another and reports on the differences.  If you do not
   give  an output file then the differences will be displayed on your terminal.
   The default file type for the output file is ".CMP".  The following  switches
   can be used at the end of the command:
   /LINES:3             -The number of  lines  that  must  be  found  in  common
                          between  two  files before the files are considered to
                          match up again.  The default value is 3.
   /MAX-LINES:1000      -The maximum number of lines  the  program  will  search
                          forward  in each files when looking for the place that
                          the files start to match up again.  The default  value
                          is  1000.  If the files don't match up after searching
                          ahead this far then FILCMP will give up.  If  you  set
                          this  value  to zero "0" then FILCMP will search until
                          the end of file before giving up.
   /QUICK               -Quick mode.  Using this switch causes FILCMP to  report
                          only  whether or not the files are different.  It will
                          not elaborate on the type or number of differences.
   /UPDATE-FORMAT       -This switch controls the format of the output file.  It
                          must  be used if you later plan to use the output file
                          with the UPDATE command.
   /EXE                 -This switch allows the user to compare two  EXE  files.
                          The   program  only  reports  whether  the  files  are
                          different or not.
   /IGNORE              -This switch instructs the  program  to  ignore  spaces,
                          tabs,  nulls,  and multiple blank lines when comparing
                          two ASCII files.
   /NO:                 -Use with one of the above  keywords  to  turn  off  the
                          switch.    (NOTE:   "/NO:MAX-LINES"  is  the  same  as
                          setting "/MAX-LINES:0")

UPDATE (source file) __ (using changes in) __.CMP (giving) __

   This command will update a file using the changes in "__.CMP".  This file  is
   the  output  file  produced by the COMPARE command using the "/UPDATE-FORMAT"
   switch.  For example, the ability to take the differences  between  two  file
   and  UPDATE  a  3rd file is useful to reapply the local site patches to a new
   version of software.  You would COMPARE the original source file supplied  by
   the vendor against the most receint site-modified source file to get the list
   of changes.  Then you could use the UPDATE command to apply these changes  to
   the  newer  verion  of the vendor's source file.  The update file produced by
   the COMPARE command may be modified by any edit program.  Just be careful not
   to  alter  any lines containing "$>>>>>>>>Change" or "$>>>File" because these
   lines are used to delimit the updates.

   The UPDATE command works by replacing one set of  lines  with  another.   The
   lines  between  "$>>>File  1"  and  "$>>>File  2" will be searched for in the
   source file.  If this group of lines is found in the source  file  then  they
   will  be  replaced  by  the lines found between the "$>>>File 2" and the next
   "$>>>>>>>>Change") If desired, you may  also  use,  or  remove,  the  special
   "<<bof>>"  and  "<<eof>>"  markers  in  the  update  file.  These markers are
   symbolic of the BEGINNING and END of the  file.   Of  course,  the  "<<bof>>"
   marker  may  only be used at the beginning of the the text for the 1st change
   in the update file.  Corrispondingly the "<<eof>>" may only be  used  at  the
   end of the text for the last change in the update file.

      /VERIFY           -Causes UPDATE to verify that the replacements  made  to
                       the  source file are unique - i.e.  that the text between
                       "$>>>File 1" and "$>>>File 2" occurs  only  once  in  the
                       source  file  (NOTE:  Only the region from the end of the
                       last update to the end of the source file is checked)