09 - controlling a process on another machine.rb

O Reilly Ruby Cookbook source code

require 'rubygems'
require 'net/ssh'

def run_remotely(command, host, args)
  Net::SSH.start(host, args) do |session|    
    session.process.popen3(command) do |stdin, stdout, stderr|
      yield stdin, stdout, stderr
    end
  end
end
#---
run_remotely('ls -l /home/leonardr/dir', 'example.com', :username=>'leonardr',
             :password => 'mypass') { |i, o, e| puts o.read }
# -rw-rw-r--    1 leonardr leonardr       33 Dec 29 20:40 file1
# -rw-rw-r--    1 leonardr leonardr      102 Dec 29 20:40 file2
#---
run_remotely('cat', 'example.com', :username=>'leonardr',
             :password => 'mypass') do |stdin, stdout, stderr|
  stdin.puts 'Line one.'
  puts stdout.read
  stdin.puts 'Line two.'
  puts stdout.read
end
# "Line one."
# "Line two."
#---