Re: unable to set time very far in the future

[Jan Schaumann <jschauma%netmeister.org@localhost>]

RVP <rvp%SDF.ORG@localhost> wrote:
> On Sat, 15 Oct 2022, Jan Schaumann wrote:
> 
> > - I just can't _set_ the clock to any value above
> > 68719476736.  Anybody know why?
> > 
> 
> There is a check in the kernel. In sys/kern/kern_time.c:
> 
>     190         /*
>     191          * The time being set to an unreasonable value will cause
>     192          * unreasonable system behaviour.
>     193          */
>     194         if (ts->tv_sec < 0 || ts->tv_sec > (1LL << 36))
>     195                 return EINVAL;
> 
> And, `date 414708200732.17' == (1<<36) + 1 secs.

Cool, thanks!

Do we have examples of what this "unreasonable system
behaviour" might be, and how we ended up picking this
particular value?

-Jan