Function io_tmpfile

deps/lua/src/liolib.c:183–187

static int io_tmpfile (lua_State *L) {
  FILE **pf = newfile(L);
  *pf = tmpfile();
  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
}


static FILE *getiofile (lua_State *L, int findex) {