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copied!<p>From <code>ri Net::SSH::start</code>:</p> <pre><code> -------------------------------------------------------- Net::SSH::start Net::SSH::start(host, user, options={}, &block) {|connection| ...} ------------------------------------------------------------------------ The standard means of starting a new SSH connection. When used with a block, the connection will be closed when the block terminates, otherwise the connection will just be returned. The yielded (or returned) value will be an instance of Net::SSH::Connection::Session (q.v.). (See also Net::SSH::Connection::Channel and Net::SSH::Service::Forward.) Net::SSH.start("host", "user") do |ssh| ssh.exec! "cp /some/file /another/location" hostname = ssh.exec!("hostname") ssh.open_channel do |ch| ch.exec "sudo -p 'sudo password: ' ls" do |ch, success| abort "could not execute sudo ls" unless success ch.on_data do |ch, data| print data if data =~ /sudo password: / ch.send_data("password\n") end end end end ssh.loop end </code></pre> <p>So it looks like you can get more interactive by using <code>#open_channel</code></p> <p>Here's some example code:</p> <pre><code>user@server% cat echo.rb #! /usr/local/bin/ruby def putsf s puts s STDOUT.flush end putsf "hello" 5.times do putsf gets.chomp end putsf "goodbye" </code></pre> <p>And on your local machine:</p> <pre><code>user@local% cat client.rb #! /usr/local/bin/ruby require 'rubygems' require 'net/ssh' words = %w{ earn more sessions by sleaving } index = 0; Net::SSH.start('server', 'user') do |ssh| ssh.open_channel do |ch| ch.exec './echo.rb' do |ch, success| abort "could not execute ./echo.rb" unless success ch.on_data do |ch, data| p [:data, data] index %= words.size ch.send_data( words[index] + "\n" ) index += 1 end end end end user@local% ./client.rb [:data, "hello\n"] [:data, "earn\n"] [:data, "more\n"] [:data, "sessions\n"] [:data, "by\n"] [:data, "sleaving\n"] [:data, "goodbye\n"] </code></pre> <p>So you can interact with a running process this way.</p> <p>It's important that the running process flush its output before requesting input - otherwise, the program might hang as the channel may not have received the unflushed output.</p>

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