Re: Using arc4random() for luai_makeseed()?

[Magerya Vitaly <vmagerya@...>]

On 12/30/2015 06:14 PM, Roberto Ierusalimschy wrote:
> Sorry to take so long to answer...

Nah. Thanks for replying.

> > So, the first question I have is: do you folks plan to use a
> > kernel-provided randomness source like 'arc4random()' (under
> > *BSD) or 'getrandom()' (under Linux)?
>
> No. As already discussed in the list, these functions are quite new
> and non portable.

I see.

> > The second question is: would you approve if FreeBSD package of
> > Lua was to patch 'luai_makeseed' into 'arc4random()'? I'm asking
> > this because I've been using such a patch locally for a while,
> > but FreeBSD Lua maintainers would like your approval before
> > adding it to the ports collection.
>
> Sure. But I would implement them a little differently:
>
> 1) The best option seems to be Daurnimator's suggestion. I guess you
> could solve the problem with the include like this:
>
>      -D__BSD_VISIBLE  -DLUA_USER_H='<stdlib.h>'  \
>      -D'luai_makeseed()=cast(unsigned int, arc4random())'

Yeah, thanks. This seems to work fine.

(Interestingly, __BSD_VISIBLE is only needed in lua53, not in lua52).