On 1/20/19 7:52 AM, Rawiri Blundell wrote:
> So it might be a case of restricting the usability of this change to
> newer kernels that have dedicated calls like getrandom() or
> getentropy(), and having to handle detecting/selecting those?
>
> So if this is an exercise that you're happy to entertain, and without
> wanting to feature-creep too much, why not something like this?
I'd probably start with URANDOM as a 32-bit random integer read as
four bytes from /dev/urandom. It's trivial to create a filename from
that with whatever restrictions (and whatever characters) you want.
> As an aside, I can confirm the findings of a performance difference
> between 4.4 and 5.0 when running the script provided earlier in the
> discussion. At first glance it seems to be due to the switch from the
> old LCG to the current MINSTD RNG,
There's no switch: the bash-4.4 generator and bash-5.0 generators are
identical. I'll have to do some profiling when I get a chance.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
