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

Have you tried:

nc -l -p 9977 -c "tail -f $1"

(untested)

Or -e with a scriptfile if your nc doesn't have -c. You may have to have an nc that was compiled with the GAPING_SECURITY_HOLE option. Yes, you should infer appropriate caveats from that option name.