[MacRuby-devel] Low-ish level MacRuby interaction

[Scott Thompson]

Howdy folks,

I'm working with MacRuby as it evolves and I've been enjoying it quite  
a lot.  I'm trying to make use of the system in an unusual way and not  
having much luck.  I thought I would post here and see if anyone has  
suggestions.

What I'm trying to do is use MacRuby as an embedded scripting  
language.  Using the framework and the Objective-C interface this is  
REALLY straightforward and easy.

What I'd like to do, however, is divorce the MacRuby standard streams  
(stdout, stdio, stderr) so that I can control them myself.  I was able  
to do this in a rather straightforward fashion from the Ruby side by,  
for example, reopening STDOUT on the write end of an NSPipe that I  
create myself.

The issue I've run into is that the NSPipe doesn't appear to grab the  
output from Ruby in the same way that original STDOUT does.  I've been  
reading a lot and I gather that the difference may have something to  
do with having STDOUT attached to a "controlling terminal" vs. going  
to the pipe.

I've been swimming around in a world of pseudo terminals and pipes and  
lots of UNIX-ish stuff that, while it is teaching me a lot, is not  
getting me much closer to my goal.

So, my question is can anyone suggest the "best" way I might be able  
to hijack the standard streams that are being used by the Ruby runtime  
so that I can forward ruby output to my own code?

Scott