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 10/17/86                                                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), sccsfile(5sccs).





























Printed 10/17/86                                                2

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