How to provide variable to irb session

Ruby
1

Hello all,

Can anyone tell me how I would go about providing a variable to an irb
session? For example, see the following screenshot from the Metasploit
Meterpreter in irb mode.

http://www.metasploit.com/images/gallery/msf3-meterp-irb.jpg

Does anyone know how they are actually providing the ‘client’ variable
to the irb session?

–
Thanks!
Bryan

2

Bryan R. wrote:

Hello all,

Can anyone tell me how I would go about providing a variable to an irb
session? For example, see the following screenshot from the Metasploit
Meterpreter in irb mode.

http://www.metasploit.com/images/gallery/msf3-meterp-irb.jpg

Does anyone know how they are actually providing the ‘client’ variable
to the irb session?

–
Thanks!
Bryan

You can run your script at Ruby startup by specifying env variables
(Ruby (Al2O3::Cr), scroll to Add to
load path), or you can specify env variable IRBRC pointing to a Ruby
file that will be executed at the start of irb only.

TPR.

3

A cheaty way:

http://snippets.dzone.com/posts/show/6099

4

Sweet… thanks!

5

Bryan R. wrote:

Hello all,

Can anyone tell me how I would go about providing a variable to an irb
session? For example, see the following screenshot from the Metasploit
Meterpreter in irb mode.

http://www.metasploit.com/images/gallery/msf3-meterp-irb.jpg

Does anyone know how they are actually providing the ‘client’ variable
to the irb session?

Is it definitely a variable, not a method?

This post shows how to start an IRb session within the context of an
arbitary object:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/244139

So you can create your own object class with a “client” method, create
an instance of this object, and start IRb such that “self” is this
object.