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Remove string metatable protection

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The string metatable and environment are no longer shared, so this
sandboxing is no longer required.
This commit is contained in:
SquidDev 2017-05-01 18:34:42 +01:00
parent bb741975b7
commit 0420b6c831
1 changed files with 0 additions and 33 deletions
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33
src/main/resources/assets/computercraft/lua/bios.lua
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@ -144,39 +144,6 @@ if _VERSION == "Lua 5.3" then
]] )()
end
if string.find( _HOST, "ComputerCraft" ) == 1 then
-- Prevent access to metatables or environments of strings, as these are global between all computers
local nativegetmetatable = getmetatable
local nativeerror = error
local nativetype = type
local string_metatable = nativegetmetatable("")
function getmetatable( t )
local mt = nativegetmetatable( t )
if mt == string_metatable then
nativeerror( "Attempt to access string metatable", 2 )
else
return mt
end
end
if _VERSION == "Lua 5.1" and not _CC_DISABLE_LUA51_FEATURES then
local string_env = nativegetfenv(("").gsub)
function getfenv( env )
if env == nil then
env = 2
elseif nativetype( env ) == "number" and env > 0 then
env = env + 1
end
local fenv = nativegetfenv(env)
if fenv == string_env then
--nativeerror( "Attempt to access string metatable", 2 )
return nativegetfenv( 0 )
else
return fenv
end
end
end
end
-- Install lua parts of the os api
function os.version()
return "CraftOS 1.8"