Function io_close

Source/Misc/lua/src/lua.c:12048–12053

static int io_close (lua_State *L) {
if (lua_isnone(L, 1))
lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT);
tofile(L);  /* make sure argument is a file */
return aux_close(L);
}


static int io_gc (lua_State *L) {