fifo-nc-proxy

# redirect tcp to fifo
$ while true; do nc -l 6000 > fifo; done

# redirect fifo to cat and prefix with "> "
$ while true; do printf "> "; cat < fifo; done
>

# write to tcp
$ echo abc | nc localhost 6000
$ echo 123 | nc localhost 6000

# The fifo redirect to cat call will yield the following
> abc
> 123
>