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sccs-cvt(1)

J..org Schilling
2018/12/18
Aliases: sccscvt(1)

sccs

Source Code Control System

NAME

sccs-cvt, sccscvt - convert SCCS history files between v4/v6

SYNOPSIS

sccscvt [ options ] s.file1 .. s.filen

DESCRIPTION

Sccscvt converts SCCS v4 history files (as introduced in February 1977) into SCCS v6 history files (as introduced in August 2011) and vice versa.
The first line, containing the SCCS magic number and the checksum is converted to the format that is appropriate. The time format in the delta table is converted by either removing the SCCS v6 extensions or by adding time zone information by assuming that all time stamps are from the local time zone. When converting from SCCS v6 to SCCS v4, the enhanced time stamp data is retained as the first delta comment line in a delta block.
SID specific SCCS v6 enhancements are converted into special delta comment to prevent information loss when converting to SCCS v4.
The SCCS v6 enhancements that are between the SCCS v4 flags indicated by ^Af and the SCCS comment block that is bracketed between ^At and ^AT are untouched as these enhancements are not flagged by historic SCCS versions and retained by historic SCCS versions when a history file is modified.
If a file argument refers to a directory, the directory is scanned for file names that start with ‘‘s.’’ and examines all these files.
This program is a SCHILY extension that does not exist in historic sccs implementations.

OPTIONS

-d When converting from SCCS v6 to SCCS v4, discard the extended SCCS v6 meta data instead of converting it into special degenerated delta comments.
-k
-keep
Keep the original history file as o.file. When this option is missing, the original file is replaced by the converted file.
-V4 Convert a SCCS v6 history file into a SCCS v4 history file.
-V6 Convert a SCCS v4 history file into a SCCS v6 history file.
-help Prints a short summary of the sccscvt options and exists.
-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:
none
The following path specifier types are supported:
-N The file name parameters to the sccscvt 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 sccscvt 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 sccscvt 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 sccscvt 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 sccscvt(1) and to send a list of path names to
-V
-version
--version
Prints the sccscvt version number string and exists.

ENVIRONMENT VARIABLES

See environ(5) for descriptions of the following environment variables that affect the execution of sccscvt(1): LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
SCCS_NO_HELP
If set, sccscvt(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.
TZ Used for the timezone when converting between SCCS v4 and SCCS v6.

EXIT STATUS

The following exit values are returned:
0 Successful completion.
1 An error occurred.
-1 A wrong option or parameter was specified.

FILES

s.file
history file
o.file
saved original version of the history file
x.file
temporary copy of the s.file; renamed to the s.file after completion.
z.file
temporary lock file contains the binary process id in host byte order followed by the host name

NOTES

If a SCCS history file is converted from SCCS v4 to SCCS v6 and there is no retained SCCS v6 timestamp information in the delta comment, it may be a good idea to manually correct time zone information.

AUTHOR

sccscvt(1) was originally written by J..org Schilling in 2011 and is still 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:
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