Followup to: <[EMAIL PROTECTED]>
By author: [EMAIL PROTECTED]
In newsgroup: linux.dev.raid
>
> + if ((my_fd = open("/dev/random", O_RDONLY)) != -1) {
>
> Please use /dev/urandom for such applications. /dev/random is the
> highest-quality generator, but will block if entropy isn't available.
> /dev/urandom provides the best available, immediately, which is what
> this application wants.
Not 100% clear; the best would be to make it configurable.
Either way you must not use read() in the way described. Short reads
happen, even with /dev/urandom.
> Also, this will only produce 2^32 possible UUIDs, since that's the
> size of the seed. Meaning that after you've generated 2^16 of them,
> the chances are excellent that they're not UU any more.
>
> You might just want to get all 128 (minus epsilon) bits from /dev/urandom
> directly.
You *do* want to get all bits from /dev/urandom directly.
-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
