Are you making a claim that we can change this?

> localhost$ RANDOM=1; echo
>     $(echo $RANDOM $RANDOM $RANDOM) $(echo $RANDOM $RANDOM $RANDOM)
> 32422 12519 25748 12519 25748 6973
> 
> The first child starts with 32422. This is the result of RANDOM=1.
> The second child starts with 12519. Executing the child and
> change_random() calls the rand() to advance the seed. Thus 12519
> advances from 32442, which is also in the second random number
> of the first child.
> 
> "Ensure next child gets a (slightly) different $RANDOM sequence."
> As the comment explains, the next child receives a different $RANDOM
> seed than before, which advances one seed only one step forward.
> 
> Thank you for your review, I learned about OpenBSD's implementation
> due to your help.
> 
> 2026년 5월 22일 (금) 오후 10:21, Theo de Raadt <deraadt@openbsd.org>님이 작성:
> >
> > Biarder <mss091204.1@gmail.com> wrote:
> >
> > > Currently, ksh(1) uses rand(3) and modular arithmetic to calculate
> > > $RANDOM.  However, OpenBSD recommend using arc4random_uniform(3)
> > > to calculate a uniform random integer because rand function is
> > > predictable and also has modular bias when modulo operation is
> > > performed.
> >
> > Your change is incorrect.  There are situations when ksh randomness
> > must follow the rand() method.
> >
> > This is handled by not using arcrandom(), but by using the rand()
> > which _is_ arc4random() behind the scenes unless srand_deterministic()
> > is called.  And srand_deterministic() is called, in those circumstances,
> > to satisfy that requirement.
> >
> > It is in the manual page.
> >
> >      RANDOM     A random number generator.  Every time RANDOM is referenced,
> >                 it is assigned the next random number in the range 0-32767.
> >                 By default, arc4random(3) is used to produce values.  If the
> >                 variable RANDOM is assigned a value, the value is used as the
> >                 seed to srand_deterministic(3) and subsequent references of
> >                 RANDOM produce a predictable sequence.
> >
> > This work was done in 2004.  When making changes, please look at the history
> > of the code you are touching.  In this case 'grep arc4random' would have found
> > you this reference, the commit message, and this text above.  If you had
> > done 'man rand', you would have learned the rest of it.
> >
> >