zpool_open_silent
if (zpool_open_silent(hdl, cn->cn_name, &zhp) != 0) {
int zpool_open_silent(libzfs_handle_t *, const char *, zpool_handle_t **);
if (zpool_open_silent(hdl, name, &zhp) != 0)
if (zpool_open_silent(hdl, thename, &zhp) != 0)