> Unfortunately the current /dev/random and /dev/urandom are very slow in
> generating data. Therefore I would rather like a /dev/frandom for fast,
> low quality randomness.
Write a tiny program for the task, something like:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
main()
{
unsigned long x; /* I'm assuming 32 bits here */
x = time(NULL);
for(;;) {
x = 69069 * x + 1;
fwrite(&x, sizeof(x), 1, stdout);
}
exit(EXIT_SUCCESS);
}
(The 69069 is _not_ random here; check Knuth's "The Art of Computer
Programming", vol2 for theory and explanation).
There are faster methods, but I'd guess that the I/O time swamps everything
else. Perhaps fiddling with using putc_unlocked(3) to avoid other overheads
might be warranted...
Hope this helps.
-- Horst von Brand vonbrand@sleipnir.valparaiso.cl Casilla 9G, Viņa del Mar, Chile +56 32 672616
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