1363 nvlist_t *

  1364 split_mirror_vdev(zpool_handle_t *zhp, char *newname, nvlist_t *props,

  1365     splitflags_t flags, int argc, char **argv)

  1366 {

  1367 	nvlist_t *newroot = NULL, **child;

  1368 	uint_t c, children;

  1369 

  1370 	if (argc > 0) {

  1371 		if ((newroot = construct_spec(argc, argv)) == NULL) {

  1372 			(void) fprintf(stderr, gettext("Unable to build a "

  1373 			    "pool from the specified devices\n"));

  1374 			return (NULL);

  1375 		}

  1376 

  1377 		if (!flags.dryrun && make_disks(zhp, newroot) != 0) {

  1378 			nvlist_free(newroot);

  1379 			return (NULL);

  1380 		}

  1381 

  1382 		/* avoid any tricks in the spec */

  1383 		verify(nvlist_lookup_nvlist_array(newroot,

  1384 		    ZPOOL_CONFIG_CHILDREN, &child, &children) == 0);

  1385 		for (c = 0; c < children; c++) {

  1386 			char *path;

  1387 			const char *type;

  1388 			int min, max;

  1389 

  1390 			verify(nvlist_lookup_string(child[c],

  1391 			    ZPOOL_CONFIG_PATH, &path) == 0);

  1392 			if ((type = is_grouping(path, &min, &max)) != NULL) {

  1393 				(void) fprintf(stderr, gettext("Cannot use "

  1394 				    "'%s' as a device for splitting\n"), type);

  1395 				nvlist_free(newroot);

  1396 				return (NULL);

  1397 			}

  1398 		}

  1399 	}

  1400 

  1401 	if (zpool_vdev_split(zhp, newname, &newroot, props, flags) != 0) {

  1402 		if (newroot != NULL)

  1403 			nvlist_free(newroot);

  1404 		return (NULL);

  1405 	}

  1406 

  1407 	return (newroot);

  1408 }