From: "James F. Hranicky" <jfh@...>
Date: 2005-08-20T00:51:51+09:00
Subject: Re: RExpect

--Multipart=_Fri__19_Aug_2005_11_51_46_-0400_H9q0mSB32w5gcyy7
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

On Fri, 19 Aug 2005 22:13:22 +0900
entropic_rune <a.griesser@gmail.com> wrote:

> Has anyone used RExpect?  Line 16 requires 'ropen3', which I have not
> been able to find.
> 
> Subsitution of  'open3'  works for all the functionality I've tested,
> although I do notice a few quirks that might be caused by this
> substitution.

I've moved to using the PTY module and the built in expect in lieu of
RExpect, as it was coring on me last time I tried it.

PTY/expect.rb seem to do a good job, and if expect is too basic you 
can roll your own. Attached is a script I used to talk to 
"apt-get upgrade" on Debian, as it's so curious. 

----------------------------------------------------------------------
| Jim Hranicky, Senior SysAdmin                   UF/CISE Department |
| E314D CSE Building                            Phone (352) 392-1499 |
| jfh@cise.ufl.edu                      http://www.cise.ufl.edu/~jfh |
----------------------------------------------------------------------

--Multipart=_Fri__19_Aug_2005_11_51_46_-0400_H9q0mSB32w5gcyy7
Content-Type: text/plain;
 name="apt-upgrade"
Content-Disposition: attachment;
 filename="apt-upgrade"
Content-Transfer-Encoding: quoted-printable

#!/local/bin/ruby

require 'pty'
require 'timeout'

QNA =3D {
    /Do you want to continue\? \[Y\/n\]/                =3D>  'y',
    /Are you sure you want to install/			=3D>  'Y',
    /Should man and mandb be installed \'setuid man\'/  =3D>  'n',
    /Default printer resolution/                        =3D>  '600',
    /May I update your system\? \[Y\/n\]/               =3D>  'y',
    /Select the desired X server driver/                =3D>  'nvidia',
    /Other destinations for which mail is accepted/     =3D>  '',
    /Do you want system wide readable home directories/ =3D>  'y',
    /Which ispell dictionary should be the/		=3D>  '1',
    /Which wordlist should be the system/		=3D>  '1',
    /What would you like to do about local.conf/	=3D>  '2',
    /What policy do you want to apply regarding/	=3D>  '1',
    /What is the layout family of your keyboard/	=3D>  '4',
    /What is the keys layout of your keyboard/		=3D>  '31',
    /Which variant do you have/				=3D>  '2',
    /portmap \(Y\/I\/N\/O\/D\/Z\)/			=3D>  'n',
    /Manage CD-ROM devices and mount points with/	=3D>  'n',
    /Select locales to be generated/			=3D>  '109 110 111',
    /Which locale should be the default/		=3D>  '2',
    /default=3DN/                                         =3D>  ''
}

class IO
    def getline
        line =3D ""
        begin timeout(1) {=20
            while ((char =3D self.getc) !=3D "\n")
                line << char
            end
            line << char
            return line
        }
        rescue Timeout::Error
            return line
        end

    end
end

def Main

    STDIN.sync =3D 1
    STDOUT.sync =3D 1
    STDERR.sync =3D 1

    ENV['TERM'] =3D "";

    system("apt-get update")

    cmd =3D ARGV.shift
    cmd ||=3D "apt-get upgrade"

    puts " -- #{cmd} -- "
    PTY.spawn(cmd) { |r,w,cid|=20
        begin
            while line =3D r.getline
                puts line unless line =3D=3D ""
                QNA.each { |q,a|
                    if line.match(q)
                        w.puts(a)
                    end
                }
            end
        end
    }

end

Main()

--Multipart=_Fri__19_Aug_2005_11_51_46_-0400_H9q0mSB32w5gcyy7--