pty-relay.rb

transfer PTY via network

#!/usr/bin/ruby
require 'pty'

Signal.trap(:CHLD, 'IGNORE')
system "stty raw -echo 2> /dev/null"

p = PTY.spawn '/bin/sh'

until p[0].closed? || STDIN.closed?
  s = IO.select [p[0], STDIN]
  while s0 = s[0][0]
    s[0].shift
    if s0 === STDIN then out = p[1] else out = STDOUT end
    begin
      out.write s0.readpartial(4096)
      out.flush
    rescue
      p $!
      p[0].close
      p[1].close

      system "stty -raw 2> /dev/null"
      puts
      exit
    end
  end
end

usage

server side: nc -l 12345 < fifo | ./test.rb > fifo
client side: stty raw -echo; nc localhost 12345 ; stty -raw