Read and write to same netcat tcp connection

Question

I have this pipeline:

  ( tail -f ${named_pipe} | nc localhost ${port} | ql_conditional_release &> "$HOME/debug.log" & disown; ) &> /dev/null

so I am reading from the netcat connection.

How can I write to that same connection? It should be two-way.

Basically if a condition is met in the ql_conditional_release function, I want to respond/write back to the same socket connection. No idea how to do that though.

Answer 1

Make the script echo into ${named_pipe}.