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SCCS-COMB(1)                General Commands Manual               SCCS-COMB(1)



NAME
       sccs-comb, comb - combine SCCS deltas

SYNOPSIS
       /usr/sccs/comb [ -os ] [ -csid-list ] [ -psid ]
            s.filename ...

DESCRIPTION
       comb  generates  a  shell script (see sh(1)) that you can use to recon-
       struct the indicated s.files.  This script is written to  the  standard
       output.

       If  a  directory  name is used in place of the s.filename argument, the
       comb command applies to all  s.files  in  that  directory.   Unreadable
       s.files  produce  an error; processing continues with the next file (if
       any).  The use of `-' as the s.filename  argument  indicates  that  the
       names  of  files are to be read from the standard input, one s.file per
       line.

       If no options are specified, comb preserves only the most recent (leaf)
       delta  in  a branch, and the minimal number of ancestors needed to pre-
       serve the history.

OPTIONS
       -o     For each `get -e' generated, access the  reconstructed  file  at
              the  release  of the delta to be created.  Otherwise, the recon-
              structed file is accessed at the most recent ancestor.  The  use
              of -o may decrease the size of the reconstructed s.file.  It may
              also alter the shape of the delta tree of the original file.

       -s     Generate scripts to gather  statistics,  rather  than  combining
              deltas.  When run, the shell scripts report: the file name, size
              (in blocks) after combining, original size (also in blocks), and
              the percentage size change, computed by the formula:
                     100 * ( original - combined ) / original

              This  option  can  be  used  to calculate the space that will be
              saved, before actually doing the combining.

       -csid-list
              Include the indicated list of  deltas.   All  other  deltas  are
              omitted.   sid-list  is a comma-separated list of SCCS delta IDs
              (SIDs).  To specify a range  of  deltas,  use  a  `-'  separator
              instead of a comma, between two SIDs in the list.

       -pSID  The SID of the oldest delta to be preserved.

FILES
       s.COMB              reconstructed SCCS file
       comb?????           temporary file

SEE ALSO
       sccs(1), sccs-admin(1), sccs-cdc(1), sccs-delta(1), sccs-help(1), sccs-
       prs(1), sccs-prt(1), sccs-rmdel(1),  sccs-sccsdiff(1),  what(1),  sccs-
       file(5)

DIAGNOSTICS
       Use the SCCS help command for explanations (sccs-help(1)).

BUGS
       comb  may  rearrange  the shape of the tree of deltas.  It may not save
       any space; in fact, it is possible for the reconstructed file to  actu-
       ally be larger than the original.



                                 27 June 1988                     SCCS-COMB(1)