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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Auditing
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Protection
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 27 April 2004