Function newfile

extlibs/lua/src/liolib.c:241–246

static LStream *newfile (lua_State *L) {
  LStream *p = newprefile(L);
  p->f = NULL;
  p->closef = &io_fclose;
  return p;
}


static void opencheck (lua_State *L, const char *fname, const char *mode) {