#include <assert.h>
#include <unistd.h>

int main()
{
    char buf[256] = { 0 };
    assert(getentropy(buf, 256) == 0);

    for (int i = 0; i < 256; i++) {
        if (buf[i] != 0) {
            return 0;
        }
    }

    // if this ever is reached, we either have a bug or should buy a lottery ticket
    return 1;
}