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comb(1)
NAME
  comb - Combines Source Code Control System (SCCS) deltas

SYNOPSIS
  comb [-clist] [-os] [-pSID] file...

  The comb command writes to standard output a shell procedure for combining
  the specified deltas (SIDs) of an SCCS file and creating a new version of
  the file with fewer deltas.

OPTIONS
  Each option or group of options applies independently to each named file.

  -clist
      Specifies a list of deltas (SIDs) that the shell procedure will
      preserve (see get -ilist). The procedure will combine all other deltas.

  -o  Accesses the reconstructed file at the release of the delta to be
      created for each get -e generated; otherwise, accesses the
      reconstructed file at the most recent ancestor.  Using the -o option
      may decrease the size of the reconstructed SCCS file.  It may also
      alter the shape of the delta tree of the original file.

  -pSID
      Specifies the SID of the oldest delta for the resulting procedure to
      preserve.	 All older deltas are combined in the reconstructed file.

  -s  Causes comb to generate a shell procedure that, instead of combining
      the deltas, produces a report for each file, which lists the file name,
      size (in blocks) after combining, original size (also in blocks), and
      percentage change computed by the following formula:
	   100 * (original - combined) / original

      Run comb using this option before actually combining SCCS deltas in
      order to judge how much space will actually be saved by the combining
      process.

DESCRIPTION
  By piping the output of the comb command to a shell, or redirecting the
  output to a file and running that file as a shell procedure, you can reduce
  the size of your SCCS file. You can first see how much the file will be
  reduced by running the comb command with the -s option.

  If you specify a directory in place of file, the comb command performs the
  requested actions on all SCCS files (that is, those with file names with
  the s. prefix).  If you specify a - (dash) in place of file, the comb
  command reads standard input and interprets each line as the name of an
  SCCS file. The comb command continues to take input until it reads End-of-
  File.

  If you do not specify any options, the comb command preserves only leaf
  deltas and the minimal number of ancestors needed to preserve the tree (see
  the delta command).

  The comb command may rearrange the shape of the tree deltas.

  The comb command may not save any space; in fact, it is possible for the
  reconstructed file to actually be larger than the original.

EXAMPLES
   1.  To  generate a report on how much space will be saved by combing all
       deltas older than SID 1.4 for SCCS file s.test.c, enter:
	    comb -p1.4 -s s.test.c | sh

   2.  To actually combine the deltas, enter:
	    comb -p1.4 s.test.c | sh

FILES
  s.COMB$$

  comb$$
      Temporary files.

SEE ALSO
  Commands:  admin(1), cdc(1), delta(1), get(1), prs(1), rmdel(1), sact(1),
  sccs(1), sccsdiff(1), sccshelp(1), unget(1), val(1), what(1)

  Files:  sccsfile(4)

  Programming Support Tools

Index for Section 1

Alphabetical listing for C

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