From: Devin Mullins <twifkak@...>
Date: 2006-11-29T23:40:12+09:00
Subject: Re: I'm a process-spawning idiot.

For reference's sake, I don't need fork. The same trick works with 
Kernel#system. Some ugly code:
   inp, out = IO.pipe
   # start Thread.critical
   old_stdout = STDOUT.dup
   STDOUT.reopen out
   system 'echo', 'matz is nice!'
   STDOUT.reopen old_stdout
   # end Thread.critical
   out.close
   puts "Hey guess what: #{inp.read}"
__END__

Out of curiosity, is this one of those places where I'd _have_ to use 
Thread.critical (assuming I don't want other threads putsing to my pipe)?

Devin

Devin Mullins wrote:
> This Ruby program:
>   STDOUT.reopen open('log.txt','w')
>   exec 'echo', 'Hi!'
>   __END__
> outputs "Hi!" to log.txt.
> 
> shell.rb (or, more specifically, shell/process-controller.rb), uses this 
> combined with fork (since exec replaces the process) to do its dirty work.
> 
> Downloading win32-process now... :D