return r;
}
+int sd_get_machine_names(char ***machines) {
+ _cleanup_closedir_ DIR *d = NULL;
+ _cleanup_strv_free_ char **l = NULL;
+ _cleanup_free_ char *md = NULL;
+ char *n;
+ int c = 0, r;
+
+ r = cg_get_machine_path(&md);
+ if (r < 0)
+ return r;
+
+ r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, md, &d);
+ if (r < 0)
+ return r;
+
+ while ((r = cg_read_subgroup(d, &n)) > 0) {
+
+ r = strv_push(&l, n);
+ if (r < 0) {
+ free(n);
+ return -ENOMEM;
+ }
+
+ c++;
+ }
+
+ if (r < 0)
+ return r;
+
+ if (machines) {
+ *machines = l;
+ l = NULL;
+ }
+
+ return c;
+}
+
static inline int MONITOR_TO_FD(sd_login_monitor *m) {
return (int) (unsigned long) m - 1;
}