RE: LUA 4.x - filesystem access limit?
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- Subject: RE: LUA 4.x - filesystem access limit?
- From: "Zdenek Stangl" <stangl@...>
- Date: 2003年9月24日 13:59:15 +0200
Sweet ;) Thanx!
-----Original Message-----
From: Roberto Ierusalimschy [mailto:roberto@inf.puc-rio.br]
Sent: Wednesday, September 24, 2003 1:52 PM
To: Lua list
Subject: Re: LUA 4.x - filesystem access limit?
> Im using lua 4 in my server appz and I would like to limit filesystem
> access to a scope of certain directory only (i.e. the server appz root
> directory). Right now anybody can access whole filesystem tree from
> scripts.
The "standard" technique is to redefine the open functions. Something
like the following:
-- redefine `readfrom'
function readfrom (name)
if not isOk(name) then
error("cannot open file " .. name)
end
return %readfrom(name) -- call the original `readfrom'
end
... -- the same for writeto, etc.
-- Roberto