On Sun, 19 Sep 2004 sigsegv@rambler.ru wrote:

> I have a silly question, looking at NetBSD source code, each file has a
> tag on the first line, like the one below
>
> $NetBSD: kern_lock.c,v 1.83 2004/08/04 10:37:08 yamt Exp $

     ^          ^          ^       ^                ^
    ???    filename      revision  date      last user who modified file

I really dunno how they make that "NetBSD" at the beginning, I usually
write

$Id: $

in a file and after cvs commit / cvs update, I get things like

$Id: vph_yacc_preprocessor.h,v 1.22 2004/09/16 15:59:23 cvs Exp $


See "man ident" or "man co"

-Florian


>
> Could somebody please explain the format of those tags, i.e. why is
> there '$' at the start and end? What is 'Exp' for? What is 'yamt' for?
>
> Thanks
>