exec (Net::SSH::Connection::Session)

         # File lib/net/ssh/connection/session.rb, line 319
    319:     def exec(command, &block)
    320:       open_channel do |channel|
    321:         channel.exec(command) do |ch, success|
    322:           raise "could not execute command: #{command.inspect}" unless success
    323:
    324:           channel.on_data do |ch2, data|
    325:             if block
    326:               block.call(ch2, :stdout, data)
    327:             else
    328:               $stdout.print(data)
    329:             end
    330:           end
    331:
    332:           channel.on_extended_data do |ch2, type, data|
    333:             if block
    334:               block.call(ch2, :stderr, data)
    335:             else
    336:               $stderr.print(data)
    337:             end
    338:           end
    339:         end
    340:       end
    341:     end