SunOS 5.11
2018/12/18
Aliases: comb(1)
sccs
Source Code Control System
NAME
sccs-comb, comb - combine SCCS deltas
SYNOPSIS
/usr/ccs/bin/comb [-os] [-c sid-list] [-p sid]
[-N bulk-spec] s.filename...
DESCRIPTION
comb generates a shell script (see sh(1)) that you can use to reconstruct the indicated s.files. This script is written to the standard output.
If a directory name is used in place of the s.filename argument, the comb command applies to all s.files in that directory. Unreadable s.files produce an error; processing continues with the next file (if any). The use of ‘-’ as the s.filename argument indicates that the names of files are to be read from the standard input, one s.file per line.
If no options are specified, comb preserves only the most recent (leaf) delta in a branch, and the minimal number of ancestors needed to preserve the history.
OPTIONS
The following options are supported:
-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.
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-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:
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.
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-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.
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ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of comb(1): LANG, LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH.
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. |
EXIT STATUS
The following exit values are returned:
0 | Successful completion. |
1 | An error occurred. |
FILES
s.COMB | reconstructed SCCS file |
comb????? | temporary file |
dump.core | If the file dump.core exists in the current directory and a fatal signal is received, a coredump is initiated via abort(3). |
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
Availability | SUNWsprot |
SEE ALSO
sccs(1), 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-rmdel(1), sccs-sact(1), sccs-sccsdiff(1), sccs-unget(1), sccs-val(1), bdiff(1), diff(1), what(1), sccschangeset(4), sccsfile(4), attributes(5), environ(5), standards(5).
DIAGNOSTICS
Use the SCCS help command for explanations (see sccs-help(1)).
BUGS
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.
AUTHORS
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.
SOURCE DOWNLOAD
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:
The download directory is:
Check for the schily-*.tar.bz2 archives.
Less frequently updated source code for the SCCS suite is at:
Separate project informations for the SCCS project may be retrieved from: