Question

Good day everyone

I need to execute command on linux machine this command is interactive
command.
Interactive command means require input like [yes , no] or password
twice

my real case is.
I create a script execute commands and get the outputs successfully.
but some servers has Loging password expired so I need to interact with
server to send the current password + the new password(twice)

ssh userName@10.0.0.243
userName@10.0.0.243's password:
You are required to change your password immediately (password aged)
Last login: Sun Aug  7 13:15:40 2011 from 10.0.0.28
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user userName.
Changing password for userName
(current) UNIX password:
New UNIX password:
Retype new UNIX password:

Notes::

• I’m using Ruby 1.9.2
• I’ve no problem in executing command in normal case
• please, I have to avoid workarounds like (echo “pass” | ssh -S) to make me pass any other interactive situations.
• I’m using ‘net/ssh’ libs
• The Script is Attached http://king-sabri.net/files/LinuxHWScanner.rb
• I tried “net/ssh/telnet” and it doesn’t help
• Some advises tell useing ‘rake/remote_task’ is the solution but I can’t understand how it works in my case

if you need more simplicity, here a simple code if you make it works I thing it’ll solve my previous issue

  require 'net/ssh'

  host = "10.0.0.106"
  port = 22     # SSH port
  user = 'root'     # username
  pass = "123123"   # password

Net::SSH.start( host,user,:password => pass, :port=> port , :verbose => :error ) do |session|

 puts session.exec!("passwd root")
end

Answer 1

Something like this?

Net::SSH.start('10.0.0.6', 'not_root', :password => "test") do |ssh|
   ssh.open_channel do |channel|
      channel.on_request "exit-status" do |channel, data|
        $exit_status = data.read_long
      end
      channel.exec("passwd") do |channel, success|
        if success
          channel.on_data do |channel, data|
            # Don't really need this callback actually
            puts "got data: #{data.inspect}"
          end
          # You don't need this line if you're root
          channel.send_data("oldpass\n")
          channel.send_data("newpass\n")
          channel.send_data("newpass\n")
        else
           puts "FAILED"
        end
      end
      channel.wait
      puts "SUCCESS" if $exit_status == 0
   end
end

This one is dirty, but working for both upon premature on-expiration prompt and upon passwd issuing:

Net::SSH.start('localhost', 'not_root', :password => "test") do |ssh|
  ssh.open_channel do |channel|
     channel.on_request "exit-status" do |channel, data|
        $exit_status = data.read_long
     end
     channel.on_data do |channel, data|
        puts data.inspect
        if data.inspect.include? "current"
                channel.send_data("oldpass\n");
        elsif data.inspect.include? "new"
                channel.send_data("newpass\n");
        end
     end
     channel.request_pty
     # This will just safely fail if we have already a password prompt on
     channel.exec("passwd");
     channel.wait
     # Will reflect a valid status in both cases
     puts $exit_status
  end
end