我应该如何关闭信号处理程序中的套接字？

import socket
import signal

# 创建套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('localhost', 8080))
sock.listen(5)

# 注册信号处理程序
def handle_signal(signum, frame):
    print(f"Received signal {signum}, shutting down socket...")
    sock.shutdown(socket.SHUT_RDWR)
    sock.close()
    print("Socket closed.")
    exit(0)

signal.signal(signal.SIGINT, handle_signal)
signal.signal(signal.SIGTERM, handle_signal)

# 主程序循环
while True:
    conn, addr = sock.accept()
    print(f"Connection from {addr} accepted.")
    conn.close()