Class: Z4box::Box

Inherits:
Object
  • Object
show all
Defined in:
lib/z4box.rb

Overview

ssh between nodes

Instance Method Summary collapse

Constructor Details

#initialize(x) ⇒ Box

Returns a new instance of Box.



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# File 'lib/z4box.rb', line 39

def initialize x
  u,b = x.split("@")
  @box = Net::SSH.start(b,u)
end

Instance Method Details

#eval(*c) ⇒ Object 



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# File 'lib/z4box.rb', line 63

def eval *c
  o = []
  [c].flatten.map { |e| o << @box.exec!(e) }
  return o.join("\n")
end

#spawn(e, p, *a) ⇒ Object 



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# File 'lib/z4box.rb', line 43

def spawn e, p, *a
  channel = ssh.open_channel do |ch|
    ch.exec "#{e} #{p} #{a.join(' ')}" do |ch, success|
      raise "could not execute command" unless success

      # "on_data" is called when the process writes something to stdout
      ch.on_data do |c, data|
        $stdout.print data
      end

      # "on_extended_data" is called when the process writes something to stderr
      ch.on_extended_data do |c, type, data|
        $stderr.print data
      end

      ch.on_close { puts "done!" }
    end
  end
  channel.wait
end