[Maxima] Re: fork in Lisp? was: Maxima servermode: stability of commands....
korte at lite.msu.edu
Wed May 10 15:29:04 CDT 2006
On May 10, 2006, at 3:41 PM, Robert Dodier wrote:
>> The symptoms were the following: on the laptop, I got my initial
>> input echoed back to me, ....
> OK, one aspect that differs between Clisp and SBCL is that Clisp
> runs readline by default, and SBCL doesn't. Readline might be
> interfering -- just a guess.
That sounds like a very likely explanation! At least it would explain
> What do you think about arranging the classic server mode in which
> the server listens for connections and then executes fork/exec for
> each client? That would guarantee a fresh, isolated environment for
> every client, and it would be faster than relaunching Maxima.
> It would almost certainly depend on details of the Lisp
> I don't see that as a showstopper, as they say.
Of course I would love that! The server should fork a new process
when a client connects, and be able to process several commands/
replies until the client disconnects, so that you maintain state
while connected. At disconnect, the child dies.
The server mode should also provide a more predictable command/answer
sequence and leave out the line counters (%oN) and prompts ($iN), as
well as all the whitespace.
But I was hesitant to ask, since I cannot help with that at the
moment. I might find a student who "speaks" Lisp, whom I could pay,
but in the past, even in a large place like MSU, it has been hard to
find good programmers.
I think operating system is an issue here - I am interested in a
Linux implementation ... I don't even know what forking would look
like in Windows ...
So I could help a little with a Linux implementation of this, but
learning Lisp (which I have never written or as much as looked at) is
a challenge for me.
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