_public_ int sd_id128_randomize(sd_id128_t *ret) {
_cleanup_close_ int fd = -1;
sd_id128_t t;
ssize_t k;
if (!ret)
return -EINVAL;
fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd < 0)
return -errno;
k = loop_read(fd, &t, 16, false);
if (k < 0)
return (int) k;
if (k != 16)
return -EIO;
/* Turn this into a valid v4 UUID, to be nice. Note that we
* only guarantee this for newly generated UUIDs, not for
* pre-existing ones.*/
*ret = make_v4_uuid(t);
return 0;
}
_public_ int sd_id128_randomize(sd_id128_t *ret) {
sd_id128_t t;
int r;
assert_return(ret, -EINVAL);
r = dev_urandom(&t, sizeof(t));
if (r < 0)
return r;
/* Turn this into a valid v4 UUID, to be nice. Note that we
* only guarantee this for newly generated UUIDs, not for
* pre-existing ones. */
*ret = make_v4_uuid(t);
return 0;
}
