Debugging with echo over socket

[abitrolly]

1. Open local socket to listen to incoming echoes.

   $ nc -Ulk /tmp/socket
   # -U  - open unix socket
   # -l  - open for listening
   # -k  - keep open for multiple connections

2. Add echo function to Python code

   
   import socket
   conn = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
   conn.connect('/tmp/socket')
   # ^ this will fail if nobody is listening on Unix socket

def echo(msg): conn.sendall(msg + '\n') echo('--- start ---') echo(sys.executable)

[abitrolly]

Error for conn.connect on Unix socket.

• socket.error: [Errno 111] Connection refused - socket file exists, but nobody listening
• socket.error: [Errno 2] No such file or directory - socket file doesn't exist