Re: [PATCH] Add example to rand.3

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On 12/28/22 22:04, Cristian Rodríguez wrote:
On Wed, Dec 28, 2022 at 5:57 PM Alejandro Colomar via Libc-alpha
<libc-alpha@xxxxxxxxxxxxxx> wrote:

Ahh, I didn't connect the dots the other day!  We don't need to wait for glibc.
libbsd already provides arc4random on GNU/Linux systems, so I can already
recommend using arc4random to seed srand(3).

I'll prepare a patch...


I would suggest avoiding that, as it suffers from all the problems
previously discussed on this list , on the relevant arc4random thread

tl;dr , it can't be safe without kernel support, as you need to know
when to drop the buffer. (on fork, on resume plus on $deity knows
condition for which there is no kernel notification about)

Maybe I'd remove the SEE ALSO reference to arc4random(3bsd) then, so that I don't "recommend" using it. I'll add arc4random(3) to SEE ALSO when we have a manual page for the function.

--
<http://www.alejandro-colomar.es/>

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