+int unit_choose_id(Unit *u, const char *name) {
+ char *s;
+
+ assert(u);
+ assert(name);
+
+ /* Selects one of the names of this unit as the id */
+
+ if (!(s = set_get(u->meta.names, (char*) name)))
+ return -ENOENT;
+
+ u->meta.id = s;
+ return 0;
+}
+
+int unit_set_description(Unit *u, const char *description) {
+ char *s;
+
+ assert(u);
+
+ if (!(s = strdup(description)))
+ return -ENOMEM;
+
+ free(u->meta.description);
+ u->meta.description = s;
+ return 0;
+}
+