Re: [tcljava-user] stdout / stdin

[Mo D. <mo...@mo...>]

Justin Ryan wrote:
> Before using Jacl, I was executing a Tcl binary via Runtime.exec. This
> provided me with an easy way of grabbing the input/output from the
> Process variable. My requirement is to capture the stdout of a
> untrusted Tcl script (and not the result).
>   

> I'd like to see Jacl behave like its in a sandbox, to use in a JSR-233
> fashion. In which it minimizes it's access to the System class
> (System.exit, System.out, System.err). Are there any efforts in this
> regard?
>
> justin
>
>   

Hi Justin

The approach of overwriting puts, gets, and read is not too complex and 
should work for you.
But, it would be a lot easier to modify the tcl.lang.StdChannel class to 
support setting
the STDIN, STDOUT, AND STDERR streams to a user supplied stream. This is 
likely
a 30 minute hack, I am sure you could implement it easily. If you want 
to do that and post
a patch, I can add it to the CVS version for Jacl 1.4.

cheers
Mo DeJong