From: Brian Candler <B.Candler@...>
Date: 2003-05-13T22:44:53+09:00
Subject: Re: RCR for child execution

On Tue, May 13, 2003 at 06:50:54PM +0900, Simon Strandgaard wrote:
> > In the general case, your Ruby program could do lots of things which force
> > a direct output to stdout/stderr. Here is one small valid Ruby program:
> > 
> >         pid = fork do
> >           exec("ls /nonexistent")
> >         end
> >         Process.waitpid(pid)
> > 
> > How are you going to modify Ruby so that the output of those four lines are
> > captured in the sandbox?
> 
> All "child-process" routines should parse rb_stdout to the children, in
> this case fork.  I know I have only mentioned system&backquote before. 
> Well all routines in Rubys Core which spawns children should do this. 

Not acceptable... this time I must insist that you answer the question :-)

How exactly are you proposing to modify the Ruby interpreter so that the
above four lines of Ruby code have their output captured?

"fork" has specific, well-defined semantics: it just calls the underlying
Unix fork. "exec" has specific, well-defined semantics in the same way.
Neither of them involves pipes.

What *exactly* do you want the two methods Kernel#fork and Kernel#exec to do
instead of their currently defined behaviour?

Regards,

Brian.