are_vdevs_in_pool
else if (are_vdevs_in_pool(1, &name, pool_name, cb))
else if (are_vdevs_in_pool(1, &name, NULL, cb))
if (*argc >= 1 && !are_vdevs_in_pool(1, &argv[*argc - 1], NULL, cb)) {
!are_vdevs_in_pool(1, &argv[*argc - 2], NULL, cb)) {
} else if (are_vdevs_in_pool(argc, argv, NULL, &cb)) {
if (are_vdevs_in_pool(argc - 1, argv + 1, argv[0], &cb)) {