zfs_list
err = zfs_list(argv[1]);
zfs_list(arg);
int zfs_list(const char *);
zfs_handle_t **zfs_list;
free(impl_handle->zfs_list);
impl_handle->zfs_list = NULL;
if (impl_handle->zfs_list != NULL) {
*fslist = impl_handle->zfs_list;
impl_handle->zfs_list = *fslist = cb.cb_handles;
if (impl_handle->zfs_list != NULL) {
zfs_handle_t **zhp = impl_handle->zfs_list;