sccs-comb(1)

sccs-comb, comb - combine SCCS deltas

-o	For each ‘get -e’ generated, access the reconstructed file at the release of the delta to be created. Otherwise, the reconstructed 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.
-Nbulk-spec	Processes a bulk of SCCS history files. This option allows to do an efficient mass processing of SCCS history files. The bulk-spec parameter is composed from an optional list of flag parameters followed by an optional path specifier. The following flag types are supported: ++ If bulk-spec is preceded by a ‘++’, comb(1) expects to process filenames that are prepended by a plus sign, the related SID and another plus sign following the form: +sid+ filename This permits each file to be retrieved with an individual SID. space This is a placeholder dummy flag that allows to use a prepared string for the -N option and to replace the space character by one of the supported flags on demand. The following path specifier types are supported: -N The file name parameters to the comb command are not s.filename files but the names of the g-files. The s.filename names are automatically derived from the g-file names by prepending s. to the last path name component. Both, s.filename and the g-file are in the same directory. -Ns. The file name parameters to the comb command are s.filename files. The the g-files names are automatically derived by removing s. from the beginning of last path name component of the s.filename. Both, s.filename and the g-file are in the same directory. -Ndir The file name parameters to the comb command are not s.filename files but the names of the g-files. The s.filename names are put into directory dir, the names are automatically derived from the g-file names by prepending dir/s. to the last path name component. -Ndir/s. The file name parameters to the comb command are s.filename files in directory dir. The the g-files names are automatically derived by removing dir/s. from the beginning of last path name component of the s.filename. A typical value for dir is SCCS. In order to overcome the limited number of exec(2) arguments, it is recommended to use ‘-’ as the file name parameter for comb(1) and to send a list of path names to stdin. This option is a SCHILY extension that does not exist in historic sccs implementations.
-V -version --version	Prints the comb version number string and exists. This option is a SCHILY extension that does not exist in historic sccs implementations.

SCCS_NO_HELP
	If set, comb(1) will not automatically call help(1) with the SCCS error code in order to print a more helpful error message. Scripts that depend on the exact error messages of SCCS commands should set the environment variable SCCS_NO_HELP and set LC_ALL=C.

0	Successful completion.
1	An error occurred.

The SCCS suite was originally written by Marc J. Rochkind at Bell Labs in 1972. Release 4.0 of SCCS, introducing new versions of the programs admin(1), get(1), prt(1), and delta(1) was published on February 18, 1977; it introduced the new text based SCCS v4 history file format (previous SCCS releases used a binary history file format). The SCCS suite was later maintained by various people at AT&T and Sun Microsystems. Since 2006, the SCCS suite is maintained by J..org Schilling.

A frequently updated source code for the SCCS suite is included in the schilytools project and may be retrieved from the schilytools project at Sourceforge at:

sccs-admin(1), sccs-cdc(1), sccs-cvt(1), sccs-delta(1), sccs-get(1), sccs-help(1), sccs-log(1), sccs-prs(1), sccs-prt(1), sccs-rcs2sccs(1), sccs-rmdel(1), sccs-sact(1), sccs-sccsdiff(1), sccs-unget(1), sccs-val(1), sccs(1), what(1), sccschangeset(5), sccsfile(5)