03-18-2014
I used to have a shell script for working on source, vis, that wrapped vi and looked for an S directory next to the target file, and files that were writable. If it found these, it checked the file into SCCS in an s.same_name in the S dir before and after editing, if the file was out of sync with the latest in SCCS. This way, I could avoid commenting out everything old into clutter. You need a tool like sccs, and a little scripting. You need code for the first pass, when there is no sccs file, as well as for the times it changes. You can choose to create the S dir as well, for any writable file edited by 'vis'. (Used to be called vim for vi my source, but someone took that!)
I think there are file systems that create version suffixes every time you modify a file.
Versioning file system - Wikipedia, the free encyclopedia
One system did daily backups and left the old or hard linked current versions in shadow directories under N .snapshotN/ dirs for N days.
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sccs-help(1) User Commands sccs-help(1)
NAME
sccs-help, help - ask for help regarding SCCS error or warning messages
SYNOPSIS
/usr/ccs/bin/help [argument...]
DESCRIPTION
The help utility retrieves information to further explain errors messages and warnings from SCCS commands. It also provides some informa-
tion about SCCS command usage. If no arguments are given, help prompts for one.
An argument may be a message number (which normally appears in parentheses following each SCCS error or warning message), or an SCCS com-
mand name. help responds with an explanation of the message or a usage line for the command.
When all else fails, try `/usr/ccs/bin/help stuck'.
FILES
/usr/lib/help directory containing files of message text
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-comb(1), sccs-delta(1), sccs-get(1), sccs-prs(1), sccs-prt(1), sccs-rmdel(1), sccs-sact(1), sccs-
sccsdiff(1), sccs-unget(1), sccs-val(1), what(1), sccsfile(4), attributes(5)
SunOS 5.10 24 Feb 1998 sccs-help(1)