[libvirt] PATCH: 21/25: Use random_r for random numbers

[Jim Meyering]

"Daniel P. Berrange" <berrange at redhat.com> wrote:
> Now that gnulib's rand module is imported, we have a decent
> quality random number generator that's portable. We don't
> want to mess with the apps state, so in virInitialize() we
> explicitly initialize our own private random nubmer generator
> state with virRandomInitialize().
>
> The util.h file gains a convenience macro, since random_r()
> is horrible to call and we need to protect our global state
>
>    int virRandom(int max)
...
> +int virRandomInitialize(void)

This all looks good and correct.
Only one suggestion: consider exposing the seed-setting
functionality by moving it up a level:

    int virRandomInitialize(int seed)

in case we ever want reproducibly random MAC addresses and UUIDs.

This might be useful for testing.