p = strjoin(unit_path, "/", template, suffix, NULL);
if (!p)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, p))
p = strjoin(unit_path, "/", template, suffix, NULL);
if (!p)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, p))