+ assert_se(sd_pid_get_cgroup(0, &cgroup) == 0);
+ printf("cgroup = %s\n", cgroup);
+ free(cgroup);
+
+ display_session = NULL;
+ r = sd_uid_get_display(u2, &display_session);
+ assert_se(r >= 0 || r == -ENODATA);
+ printf("user's display session = %s\n", strna(display_session));
+ free(display_session);
+