https://invisible-island.net/ded/sccs_tools/
sccs2rcs - build RCS file from SCCS file preserving deltas.
sccs2rcs [options] [file-specifications]
Sccs2rcs reads an sccs archive, analyzes its revision history and
issues commands to the rcs checkin program to construct an equivalent
rcs archive.
This is an enhanced version of a utility sccstorcs, which translates an
sccs archive into an rcs archive. The program reads the archive,
extracts the version numbers and comments and applies them to construct
an equivalent archive in rcs format.
There are two enhancements made. The fundamental change is that this
utility preserves the time stamp information when translating.
The secondary enhancement detects sccs keywords in the file, and
replaces them by an rcs identifier. This works by searching for the
string "@(#)" in each line, and replacing from that point til the end
of the line (or the next quote character) with the rcs "Id" keyword.
When keyword replacement is specified, the utility also looks for a
suitable place to insert the rcs "Log" keyword. It does this by
scanning each line that begins with the same string specified for the
comment-prefix option, skipping whitespace and looking for (ignoring
case) one of the following keywords, terminated by a colon:
last, modified, revised, revision, updated, update
-c string
specifies the comment-prefix option in the rcs file. You should
use this option when you use the "-e" option to translate
keywords.
-e attempts to replace sccs keywords by rcs keywords. Repeat the
option to also edit the Log-comment.
-q quiet, tells the sccs and rcs utilities to shut up. This option
is overridden by "-v".
-v verbose, controls the amount of messages that describe what the
program is doing. Repeat this option to show the contents of
the sccs file header.
-t shows what would be done, but doesn't do it.
Sccs2rcs uses the following files
getdelta
A wrapper for the sccs utility get that checks out a file
keeping its modification time the same as the original checkin
time.
checkin
A wrapper for the rcs utility ci that checks in a file
preserving its modification time.
sccsfile (5), rcs (5), get (1), getdelta (1), checkin (1)
Ken Greer
Modified by Thomas Dickey (dickey@clark.net) to preserve time stamps,
and to convert keywords.
SCCS2RCS(1)