zpool_get_physpath
if (zpool_get_physpath(zpoolp, physpath, sizeof (physpath)) != 0) {
ret = zpool_get_physpath(zph, buf, sizeof (buf));
if ((ret = zpool_get_physpath(zph, root->gr_physpath,
extern int zpool_get_physpath(zpool_handle_t *, char *, size_t);