- if (saved_machine_id_valid) {
- *ret = saved_machine_id;
- return 0;
- }
-
- fd = open("/etc/machine-id", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- return -errno;
-
- r = loop_read_exact(fd, buf, 33, false);
- if (r < 0)
- return r;
- if (buf[32] !='\n')
- return -EIO;
-
- for (j = 0; j < 16; j++) {
- int a, b;
-
- a = unhexchar(buf[j*2]);
- b = unhexchar(buf[j*2+1]);
+ if (sd_id128_is_null(saved_machine_id)) {
+ r = id128_read("/etc/machine-id", ID128_PLAIN, &saved_machine_id);
+ if (r < 0)
+ return r;