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comp.lang.ruby

Pipes and STDERR

James Smith

2/16/2007 10:39:00 AM

Hello everyone,

I would like to be able to assign my pipe to a variable, whilst still
being able to capture STDERR; i'm sure this is possible but can't think
how to do it..

This is the code for the pipe:

@pipe = IO.popen("ruby userFile/file.rb", "r+")

I am on windows and have tried to use the systemu library to no avail..

any ideas?

--
Posted via http://www.ruby-....
3 Answers

Robert Klemme

2/16/2007 12:50:00 PM

0

On 16.02.2007 11:39, James Smith wrote:
> I would like to be able to assign my pipe to a variable, whilst still
> being able to capture STDERR; i'm sure this is possible but can't think
> how to do it..

What exactly do you mean? Why is the pipe and stderr related? Are you
talking about stderr of the Ruby process or of some child process?

Regards

robert

James Smith

2/16/2007 3:29:00 PM

0


>
> What exactly do you mean? Why is the pipe and stderr related? Are you
> talking about stderr of the Ruby process or of some child process?

Sorry, not very well explained.. i need to capture stderr of the ruby
process and write it into the pipe


--
Posted via http://www.ruby-....

Robert Klemme

2/16/2007 5:14:00 PM

0

On 16.02.2007 16:29, James Smith wrote:
>> What exactly do you mean? Why is the pipe and stderr related? Are you
>> talking about stderr of the Ruby process or of some child process?
>
> Sorry, not very well explained.. i need to capture stderr of the ruby
> process and write it into the pipe

Ah! Then I'd try this:

STDERR.reopen(pipe)

http://www.ruby-doc.org/core/classes/IO.ht...

Regards

robert