Thanks for the pointers. I wasn't aware of setvbuf.  I'll look more into
pty.

ara.t.howard wrote:
> On May 10, 2008, at 12:08 AM, Paul Winward wrote:
>> Thanks for the suggestion but I'm still having the problem.
> 
> if the child program makes a call to setvbuf (as ruby does) there is
> little you can do to alter this behaviour.  otherwise the 'normal'
> approach will work:
> 
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