From: Sebastian Hungerecker <sepp2k@...>
Date: 2007-07-22T18:18:59+09:00
Subject: Re: IO.popen - continuous output

Dan Zwell wrote:

> file1:
> #!/usr/bin/env ruby
> 5.times {puts "hi"; sleep 0.5}
>
> file2:
> #!/usr/bin/env ruby
> IO.popen("./file1").each_line { |line| puts line }
>
> When running file2 (which should stream the output from file1), the
> output is not streamed, but instead saved up until "file1" finishes
> running and then dumped.

That seems to be a buffering issue. If you set STDOUT.sync to true in file1,
it will work as expected.


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