From: Sean O'Halpin <sean.ohalpin@...>
Date: 2013-05-08T20:38:04+09:00
Subject: Re: File Problem with pty and irb

You're not waiting for the child process in cmd.rb so it's killed when
the ruby process finishes. Try:

    require 'pty'
    @rbOut, @rbIn, @pid = PTY.spawn('mycode')
    Process.waitpid(@pid)

Regards,
Sean

On Wed, May 8, 2013 at 12:46 AM, Admin Tensor <lists@ruby-forum.com> wrote:
> Hi,
>
> I have a C code that writes to a fifo file (a named pipe), and when I
> just run it directly, it is fine:
>
>     Screen 1: ./mycode
>               (running)
>
>     Screen 2: cat < namedpipe
>               (a lot of outputs)
>
> But when I try to run it via irb, it doesn't give me the output:
>
>     Screen 1: irb -r cmd.rb
>               irb(main):001:0>
>               (the code is running in the background)
>
>     Screen 2: cat < namedpipe
>               (nothing)
>
> and cmd.rb is basically
>
>     require 'pty'
>     @rbOut, @rbIn, @pid = PTY.spawn('mycode')
>
> It looks that the code is running, because I can give the command in
> Screen 1 and the results are fine and indicate progress.  Is there any
> way to make mycode to output to namedpipe under irb?  Thanks.
>
> Best regards,
>
> Bill
>
> --
> Posted via http://www.ruby-forum.com/.
>