COMB(1)
NAME
comb − combine SCCS deltas
USAGE
comb [ −o ] [ −s ] [ pSID ] [ −clist ] files
DESCRIPTION
Comb generates a Shell procedure that reconstructs the given SCCS files. The reconstructed files are usually smaller than the original files. The arguments may be specified in any order, but options apply to all named SCCS files. If a directory is named, comb behaves as though each file in the directory is specified as a named file, except that it silently ignores non-SCCS and unreadable files.
If you supply a dash (−) in place of a filename, comb reads the standard input. It takes each line of the input to be the name of an SCCS file to be processed, silently ignoring non-SCCS and unreadable files. Comb writes the generated Shell procedure on the standard output.
The valid options are described below. Each is explained as though only one named file is to be processed, but the effects of any option apply independently to each named file. If no options are specified, comb preserves only leaf deltas and the minimal number of ancestors needed to preserve the tree.
OPTIONS
−clist Specify a list of deltas to be preserved. See get (1) for the syntax of a list.
−o Access the reconstructed file at the release of the delta to be created. This activity occurs for each −e generated. By default, the reconstructed file is accessed at the most recent ancestor. Using this option may decrease the size of the reconstructed SCCS file and alter the shape of the delta tree of the original file.
−pSID Specify the SCCS Identification string (SID) of the oldest delta to be preserved. Discard all older deltas in the reconstructed file.
−s Generate a Shell procedure which, when run, produces a report on each file. This report will contain: the filename, size (in blocks) after combining, original size (in blocks), and percentage change computed by the following: 100 * (original - combined) / original Use this option before any SCCS files are actually combined, to determine how much space is saved by the combining process.
CAUTIONS
Comb may rearrange the shape of the tree of deltas. It may not save any space; in fact, the reconstructed file may actually be larger than the original.
FILES
s.COMB reconstructed SCCS file
comb????? temporary
DIAGNOSTICS
Use help (1) for explanations.