From: Wesley J Landaker <wjl@...>
Date: 2004-01-19T00:26:19+09:00
Subject: Re: running external process?

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On Sunday 18 January 2004 5:39 am, Ferenc Engard wrote:
> Hi all,
>
> Is there a simple way to spawn an external program, feed its stdin,
> and get its stdout?
>
> 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=3DIO.popen("externalfilter")
> io.write(verybigstring)
> result=3Dio.read

require 'open3'
Open3.popen3("externalfilter") { |sin,sout,serr|
  sin.write(verybigstring)
  result =3D sout.read
}

=2D-=20
Wesley J. Landaker - wjl@icecavern.net
OpenPGP FP: 4135 2A3B 4726 ACC5 9094  0097 F0A9 8A4C 4CD6 E3D2


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