I'm building something similar to a bot. If possible, can you send me your
IRC code? I'm now trying to figure out how to write a server to accept and
execute scripts from a client.
Did you use parse-string to build the quot needed by with-datastack?
Thanks,
Pinku
On Fri, Oct 16, 2009 at 12:14 PM, Adam <[email protected]> wrote:
> Pinku,
>
> Print the error message that was returned by eval>str to find out that
> you are missing a vocabulary.
>
> When I was using eval, I constructed the string using prepend to add a
> `default' set of vocabularies. Be warned though; syntax is the
> vocabulary you noticed being available at all times, this means that
> any eval can USE: other vocabularies including io.
>
> SYMBOL: eval-vocabs
> "USING: kernel math prettyprint ;" " " append eval-vocabs set
>
> : (eval-vocabs) ( str -- 'str ) eval-vocabs get prepend ;
>
> { } [ "1 1 + ." (eval-vocabs) eval>string print ] with-datastack drop
> => 2
>
> Are you building an IRC bot? That's what I was using eval>str for.
>
> To make the bot `safer' I used the with-datastack combinator to
> produce a fresh stack between evaluations but defined words and loaded
> vocabularies were remembered as they were in the code heap.
>
> For isolation I used a non-persistent virtual machine to host the
> factor instance with an OS image that did not contain sudo or even
> root. To access the VM for installation or updates I used the
> installation CD to boot with a root shell. I could sftp or scp new
> bot code and reload that in factor while the limited OS was running
> though. In order to maintain a persistent connection to IRC and
> isolate the connection I had planed on using ZNC as an IRC frontend to
> reduce join/quit messages upon bot reload and nickserv identification.
>
> -Adam
>
> On Fri, Oct 16, 2009 at 8:03 AM, Pinku Surana <[email protected]> wrote:
> > Hi,
> > I'd like to evaluate a string at runtime within an environment that uses
> > additional vocabularies. The two words I found in the docs are eval( and
> > eval>string. I guess both use some default vocabulary, but how can I add
> > more without hacking the input string? Even better would be a way to
> > construct an environment that has pre-loaded a set of vocabularies and
> > denied permission to another set of vocabularies. For example, I'd like
> to
> > disallow people from using anything in the io namespace.
> > Also, I can't even make eval>string work. What's wrong with this?
> > ( scratchpad ) "USING: kernel ; 1 1 + drop ;" eval>string
> > :deprecations - show 6 deprecated word usages
> > --- Data stack:
> > "1: USING: kernel ; 1 1 + drop ;\n ^\nNo ..."
> > ( scratchpad )
> >
> > Thanks,
> > Pinku
> >
> >
> >
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