# tested with python3 only !!
import os
import time
import pwd
from datetime import datetime
import threading

def get_process_info(pid):
    try:
        with open(f"/proc/{pid}/status") as f:
            status_data = f.read()
        with open(f"/proc/{pid}/cmdline") as f:
            cmdline_data = f.read().replace("\0", " ").strip()
            
        status_lines = status_data.splitlines()
        process_info = {"pid": pid}
        
        for line in status_lines:
            if line.startswith("Name:"):
                process_info["name"] = line.split(":", 1)[1].strip()
            elif line.startswith("Uid:"):
                uid = int(line.split(":", 1)[1].strip().split()[0])
                process_info["username"] = pwd.getpwuid(uid).pw_name
                
        process_info["cmdline"] = cmdline_data
        return process_info
    
    except FileNotFoundError:
        return None
    
def get_current_processes():
    process_list = []
    try:
        for pid in os.listdir("/proc"):
            if pid.isdigit():
                process_info = get_process_info(pid)
                if process_info:
                    process_list.append(process_info)
    except:
        return 0
    
    return process_list

def check_new_processes(prev_processes, current_processes):
    new_processes = [p for p in current_processes if p not in prev_processes]
    return new_processes

def print_process(process_info):
    current_time = datetime.now().strftime("%H:%M:%S")
    print(
        f"{current_time} "
        f"{process_info['pid']:<6} "
        f"{process_info['username']:<10} "
        f"{process_info['name']:<30} "
        f"{process_info['cmdline']:<60}"
    )

def worker_thread():
    global prev_processes
    global stop_threads
    while not stop_threads:
        current_processes = get_current_processes()
        if current_processes == 0:
            pass
        else:
            new_processes = check_new_processes(prev_processes, current_processes)

            if new_processes:
                for new_process in new_processes:
                    print_process(new_process)

        prev_processes = current_processes
        time.sleep(0.0001)  

if __name__ == "__main__":
    try:
        print(f"{'TIME':<19} {'PID':<6} {'USER':<10} {'NAME':<30} {'CMDLINE':<60}")
        print("-" * 125)

        global prev_processes
        global stop_threads
        stop_threads = False

        prev_processes = get_current_processes()
        for process in prev_processes:
            print_process(process)

        worker = threading.Thread(target=worker_thread)
        worker.start()

    except KeyboardInterrupt:
        print("\nProcess monitor stopped.")
        stop_threads = True