- r = getenv_for_pid(1, "container_uuid", &e);
- if (r > 0) {
- if (strlen(e) >= 36) {
- r = shorten_uuid(id, e);
- if (r >= 0) {
- log_info("Initializing machine ID from container UUID.");
- return 0;
+ } else {
+ /* If we are not running in a container, see if we are
+ * running in qemu/kvm and a machine ID was passed in
+ * via -uuid on the qemu/kvm command line */
+
+ r = detect_vm(&vm_id);
+ if (r > 0 && streq(vm_id, "kvm")) {
+ char uuid[37];
+
+ fd = open("/sys/class/dmi/id/product_uuid", O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd >= 0) {
+ k = loop_read(fd, uuid, 36, false);
+ safe_close(fd);
+
+ if (k >= 36) {
+ r = shorten_uuid(id, uuid);
+ if (r >= 0) {
+ log_info("Initializing machine ID from KVM UUID.");
+ return 0;
+ }
+ }