Top Level Coroutine Override FIXED/REWORKED

--[[
    Attempt to recreate Top-Level coroutines
    Because the old program doesn't work (for me atleast)

    UPDATE: This is Lua 5.2+ compatible now

    Credits to:
    -Nevercast (for the old script, of course)
    -Me (kappa)

    Have fun with this :)

    Nevercast's code: http://pastebin.com/2SQAzrWi

    The problem was the way he searched for shell. I already fixed it ones but Lua 5.2+ won't have getfenv()
    anymore and that's why I give a even smaller version of it

    And thanks (again) to Nevercast for this awesome idea :)

    -Piorjade 2016
]]

local progs = {
    function()
        print("Before shell.")
        os.run( {}, "rom/programs/shell" )
    end,

    --[[

    EXAMPLE:

    function()
        os.run( {}, "/my/secret/stuff/secretApplication" )
    end
    ]]
}

local oldState = {}
local msgs = true

local oldErr = printError

local function inject()
    _G.printError = oldErr
    term.setCursorPos(1,1)
    term.clear()
    _G['rednet'] = nil
    os.loadAPI("/rom/apis/rednet")
    local ok, err = pcall( function()
    parallel.waitForAny(
        unpack(progs)
    )

    end )
end

_G.printError = inject
os.queueEvent("terminate")