# connect the fake pty to a process that generates output
$ socat pty,raw,echo=0,link=/tmp/fakepty \
  exec:'perl -e "$|=1;while(1){print q{Foo },$x++,qq{\n};sleep 2}"'

  # connect the fake pty to the current terminal
$ socat pty,raw,echo=0,link=/tmp/fakepty -,icanon=0,min=1