static unsigned int nthreads = 1;
static char *dir;
-char sz_idx[80], bs_idx[80], loop_idx[80], dir_idx[80], t_idx[80];
+static char sz_idx[80], bs_idx[80], loop_idx[80], dir_idx[80], t_idx[80];
static const char *tb_opts[] = {
"buffered=0", sz_idx, bs_idx, loop_idx, dir_idx, t_idx,