From: Theo Buehler <tb@theobuehler.org>
Subject: Re: ksh(1), use arc4random_uniform(3) to calculate $RANDOM
To: Biarder <mss091204.1@gmail.com>
Cc: tech@openbsd.org, Manuel Giraud <manuel@ledu-giraud.fr>, Stuart Henderson <stu@spacehopper.org>
Date: Fri, 22 May 2026 14:34:23 +0200

On Fri, May 22, 2026 at 07:31:04PM +0700, Biarder wrote:
> I forgot to CC tech@ on it :(
> 
> I will try to find a way to stay deterministic and modular-bias safe.

There is no bias if the modulus is a power of 2.

> Thank you so much.
> 
> 2026년 5월 22일 (금) 오후 7:21, Manuel Giraud <manuel@ledu-giraud.fr>님이 작성:
> >
> > Biarder <mss091204.1@gmail.com> writes:
> >
> > > Sorry about not reading the manual first, and thank you for letting me
> > > know about that. But I think this patch is still meaningful because
> > > It removes the useless change_rand function, and tiny modular bias.
> >
> > Ok I see (this time it is me who should have read arc4random(3) 😅).  I
> > also do not understand the purpose of the change_rand call but I'm not
> > an expert.
> >
> > Finally, I think you should stand for your patch on the list (and not
> > just to me ;-) where you'll have input from real experts.
> > --
> > Manuel Giraud
>