module Net::SCP::Download

def download_start_state(channel)

"read directive" state (see #read_directive_state).
readiness to proceed. Then, the state machine is placed into the
and scaffolding and then sends a 0-byte to the remote server, indicating
time the channel is processed. This state does some basic error checking
#start_command method puts the state machine into this state the first
This is the starting state for the download state machine. The 
def download_start_state(channel)
  if channel[:local].respond_to?(:write) && channel[:options][:recursive]
    raise Net::SCP::Error, "cannot recursively download to an in-memory location"
  elsif channel[:local].respond_to?(:write) && channel[:options][:preserve]
    lwarn { ":preserve option is ignored when downloading to an in-memory buffer" }
    channel[:options].delete(:preserve)
  elsif channel[:options][:recursive] && !File.exist?(channel[:local])
    Dir.mkdir(channel[:local])
  end
  channel.send_data("\0")
  channel[:state] = :read_directive
end