mdb_tab_typename
extern int mdb_tab_typename(int *, const mdb_arg_t **, char *buf, size_t len);
if ((ret = mdb_tab_typename(&argc, &argv, tn, sizeof (tn))) < 0)
if ((ret = mdb_tab_typename(&argc, &argv, tn, sizeof (tn))) < 0)
if ((ret = mdb_tab_typename(&argc, &argv, tn, sizeof (tn))) < 0)