_z_is_directory
int _z_is_directory(char *path);
if (_z_is_directory(a_lzMountPoint) != 0) {
if (_z_is_directory(a_gzPath) != 0) {
if (_z_is_directory(lzRootPath) != 0) {
if (_z_is_directory(gzMountPoint) == 0) {