According to http://lua-users.org/lists/lua-l/2012-06/msg00065.html
The OpenWrt Lua is patched and uses a different bytecode format compared to the official vanilla Lua release.
And here is a Lua bytecode file which has something to do with OpenWrt, I just wanna decompile it.
http://wikisend.com/download/123742/system.lua
LuaDec and other decompilers didn't work at all.
Plz...