r = loop_write(seed_fd, buf, (size_t) k, false);
if (r <= 0) {
log_error("Failed to write new random seed file: %s", r < 0 ? strerror(-r) : "short write");
r = loop_write(seed_fd, buf, (size_t) k, false);
if (r <= 0) {
log_error("Failed to write new random seed file: %s", r < 0 ? strerror(-r) : "short write");