From: Ferenc Engard <ferenc@...>
Date: 2004-01-19T02:34:43+09:00
Subject: Re: running external process?

> > The problem with popen is, if I want to feed a few MB's of input to it,
> > then it hangs (I suspect that its stdout IO buffer is full) before I
> > could read out its stdout on the next line. So, the following do not
> > work:
> >
> > io=IO.popen("externalfilter")
> > io.write(verybigstring)
> > result=io.read
> 
> You need at least two threads or non blocking IO. How about:
> 
> IO.popen( "cat", "w+" ) do |io|
>   r = Thread.new(io) do |reader|
>     while ( line = reader.gets )
>       line.chomp!
>       $stdout.puts line
>     end
>   end
> 
>   (1..100000).each {|i| io.puts i}
>   r.join
> end

Thank you, this is what I need. Since I program in ruby, a 8-9 rows of
code seems too difficult to write by myself. :-/

Ferenc