Redirect process stdin and stdout to netcat

Question

I have an embedded linux application with a simple interactive command line interface.

I\'d like to access the command line from telnet (or network, in general).

Answer 1

Is there a way to redirect both stdin and stdout to netcat

There is socat, which is a more advanced netcat. You can redirect both stdin and stdout with it. E.g.:

socat TCP4-LISTEN:5556,reuseaddr,fork EXEC:"cat - /etc/redhat-release"

In the above cat reads stdin and /etc/redhat-release and outputs them into stdout.

And then try using that:

$ echo "hello" | nc 127.0.0.1 5556
hello
Fedora release 22 (Twenty Two)

$ echo "hello 2" | nc 127.0.0.1 5556
hello 2
Fedora release 22 (Twenty Two)