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Tracking versions with SCCS

Formatting

SCCS files are composed of lines of ASCII text arranged in six parts as follows:


Checksum
a line containing the logical sum of all the characters of the file (not including the checksum line itself)

DeltaTable
information about each delta, such as type, SID, date and time of creation, and commentary

UserNames
list of login names and/or group IDs of users who are allowed to modify the file by adding or removing deltas

Flags
indicators that control certain actions of SCCS commands

Descriptive Text
usually a summary of the contents and purpose of the file

Body
the text administered by SCCS, intermixed with internal SCCS control lines

Details on these file sections may be found in sccsfile(4). The checksum line is discussed in ``Auditing''.

Because SCCS files are ASCII files they can be processed by non-SCCS commands like ed, grep, and cat. This is convenient when an SCCS file must be modified manually (a delta's time and date were recorded incorrectly, for example, because the system clock was set incorrectly), or when a user wants simply to look at the file.


CAUTION:

Extreme care should be exercised when modifying SCCS files with non-SCCS commands.



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SCO OpenServer Release 6.0.0 -- 02 June 2005