client_ls.py


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#!/usr/bin/env python3
#lists client information

import fcntl
import json
import os


def read_data():
    try:
        with open('/tmp/ssh_sessions.json', 'r') as f:
            # Get shared lock for reading
            fcntl.flock(f.fileno(), fcntl.LOCK_SH)
            try:
                data = json.load(f)
                for pid, info in data.items():
                    print(info)
                return {}
            finally:
                fcntl.flock(f.fileno(), fcntl.LOCK_UN)
    except (FileNotFoundError, ValueError):
        print("file /tmp/ssh_sessions.json not found")
        return {}

read_data()