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On Fri, Sep 01, 2006 at 01:10:45PM -0700, gary ng wrote:
> I am wondering if this can be done to write a
> bidirectional netcat like system in Lua(say ip over
> DNS).

Do you mean file i/o or socket i/o?

Non-blocking file i/o isn't possible on many (most?) OS, without using
asynchronous i/o calls, availability of which is very OS dependent.

Non-blocking socket i/o is supported by LuaSocket, isn't it?