COMB(1SCCS)             COMMAND REFERENCE             COMB(1SCCS)



NAME
     comb - combine SCCS deltas

SYNOPSIS
     comb [ -clist ][ -o ][ -psid ][ -s ] filename...

DESCRIPTION
     Comb generates a shell procedure (see sh (1sh)) which, when
     run, will reconstruct the given SCCS files.  The
     reconstructed files will, hopefully, be smaller than the
     original files.  The arguments may be specified in any
     order, but all keyletter arguments apply to all named SCCS
     files.  If a directory is named, comb behaves as though each
     file in the directory were specified as a named file.  If a
     name of - (a dash) is given, the standard input is read;
     each line of the standard input is taken to be the name of
     an SCCS file to be processed.

     The generated shell procedure is written on the standard
     output.

OPTIONS
     Each option is explained as though only one named file is to
     be processed, but the effects of any keyletter argument
     apply independently to each named file.

     If no keyletter arguments are specified, comb will preserve
     only leaf deltas and the minimal number of ancestors needed
     to preserve the tree.

     -clist
        A list (see get (1sccs) for the syntax of a list) of
        deltas to be preserved.  All other deltas are discarded.

     -o For each get -e generated, this argument causes the
        reconstructed file to be accessed at the release of the
        delta to be created; otherwise the reconstructed file
        would be accessed at the most recent ancestor.  Use of
        the -o keyletter may decrease the size of the
        reconstructed SCCS file.  It may also alter the shape of
        the delta tree of the original file.

     -pSID
        The SCCS identification string (SID) of the oldest delta
        to be preserved.  All older deltas are discarded in the
        reconstructed file.

     -s This argument causes comb to generate a shell procedure
        which, when run, will produce a report that gives (for
        each file): the filename, size (in blocks) after
        combining, original size (also in blocks), and percentage
        change computed by:



Printed 4/6/89                                                  1

COMB(1SCCS)             COMMAND REFERENCE             COMB(1SCCS)



          %100 * (original - combined) / original

        It is recommended that before any SCCS files are actually
        combined, one should use this option to determine exactly
        how much space is saved by the combining process.

FILES
     s.COMB    The name of the reconstructed SCCS file

     comb????? Temporary

DIAGNOSTICS
     Use sccshelp (1sccs) for explanations.

CAVEATS
     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 actually be larger than the original.

     Non-SCCS files and unreadable files are silently ignored.

SEE ALSO
     admin(1sccs), delta(1sccs), get(1sccs), sccshelp(1sccs),
     prs(1sccs), and sccsfile(5sccs).































Printed 4/6/89                                                  2

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