🚀 go-pugleaf

I am writing a makefile to install some files.  The makefile should checkin
what the user currently has (as a backup copy), and copy the new file over.
If the user already has his/her files backed up in RCS, then I want to
checkin his/her file if it has been checked out.  Normally I check to see
if $HOME/RCS/file,v exists.  If it does, then I check to see if the file
$HOME/file is writeable.  The problem is that many of the programs that use
this file need to write to it, and they will perform a chmod to make the
file writeable by user.  In other words, just because I have write permissions
that does no mean that the file was checked out with a lock.

I am trying to find some command (like test) that I could put in an expression
that would tell me if the file has been locked.  For instance:

if ! rcslock $HOME/file ; then \
	co -l $HOME/file \
fi;

Is there any way to use some of the RCS functions to perform this task?  I.E.
do any of the RCS funtions return true if a file is locked and false otherwise
(or vice versa)?

I am using RCS 5.5 (I have a copy of RCS 5.6, but haven't uudecoded it yet).

If anyone has the answer to this, let me know.  I would prefer e-mail as I
rarely get time to get onto usenet.

Thanks.

Garry Garrett
garry@ceco.ceco.com
-- 
# Garry Garrett, P&EIS		(Me?  Speak for CECo?  I get into enough
# Commonwealth Edison Co.         trouble speaking for myself!) 
# P.O. Box 767, Rm 1139G G.O.   UUCP: ...!uunet!ceco.ceco.com!garry
# Chicago, IL 60690-0767	Internet: garry@ceco.ceco.com