rc improvements (wanted?)

[Danny Braniss]

> Bernd Walter wrote:
> > Speaking about small systems, where startup time is more a problem than
> > on 08/15 desktop and server systems.
> > What I would love to see is that scripts like moused, ypserv, lpt, etc
> > are not started if the services are disabled.
> 
> That wold be a neat trick, how do you propose we accomplish it? (no, 
> I'm not being snide.)
> 
> There are 144 scripts in /etc/rc.d/ on HEAD right now. Out of those I 
> count roughly 40 that I actually need, so let's round off to 100 
> unnecessary scripts to make the math easy. On my system (a pretty fast 
> C2D) it takes roughly .3 seconds of wall clock time to run one script 
> that is not enabled. Now cut that roughly in half since each of those 
> scripts will not have to suck in /etc/rc.subr and /etc/rc.conf* when 
> run at boot time, and that's 15 seconds of boot time that I could save 
> on average, let's say +/- 5 seconds. That's worth giving some thought to.
> 

what if rcorder could provide the list of only those scripts
that have 'script_enable="yEs", thus reducing the number of execs?

> One way you could do this is to have /etc/rc.d/active and 
> /etc/rc.d/inactive (and probably an /etc/rc.d/system for critical 
> stuff that most people shouldn't touch). Then you could have a 
> vipw-like system to allow users to edit rc.conf that would move the 
> scripts to the right directory. Of course, this would be fraught with 
> potential for problems. :)
> 
> Another thing that would work for systems that a more sophisticated 
> admin/user updates with mergemaster would be to write a pre-compare 
> script that removes all the scripts you know you don't need from the 
> temproot/etc/rc.d so that they don't get installed. Of course the 
> benefit of that would not be nearly as wide spread, but it would also 
> not result in so much foot-shooting.
> 
> > So far each script is started, sucks in routines plus rc.conf
> 
> We're actually a little smarter than that. :) rc.subr and 
> rc.conf[.local] are loaded once by rc, then each script that runs 
> inherits those values.
> 
> hth,
> 
> Doug
> 
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