How to get the PID of a process that is piped to another process in Bash?

Question

I am trying to implement a simple log server in Bash. It should take a file as a parameter and serve it on a port with netcat.

( tail -f $1 & ) | nc -l -         


        

Answer 1

how about this:

jobs -x echo %1

%1 is for first job in chain, %2 for second, etc. jobs -x replaces job specifier with PID.