Re: error when loading strict.lua
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: error when loading strict.lua
- From: "Dirk Feytons" <dirk.feytons@...>
- Date: 2007年9月18日 10:28:28 +0200
On 9/14/07, Dirk Feytons <dirk.feytons@gmail.com> wrote:
[...]
I figured it out.
CGILua runs the CGI scripts in a kind of sandbox. For that sandbox it
removes some dangerous globals from _G:
-- Cleaning environment
removeglobals {
"os.execute",
"loadlib",
"package",
"debug",
}
-- Build fake package
_G.package = { seeall = seeall, }
The creation of the fake package triggers the strict code. In that
code there's the function what():
local function what ()
local d = debug.getinfo(3, "S")
return d and d.what or "C"
end
Since the 'debug' table is not available anymore the call
'debug.getinfo()' recursively triggers itself again until we hit the C
stack limit.
I changed strict.lua to take a local reference to 'debug.getinfo()' so
it will still work in case the 'debug' table is removed. I don't know
if this change can be done in the official distribution as well?
--
Dirk F.