#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0

#
# This file is part of Lustre, http://www.lustre.org/
#
# lustre/tests/socketserver
#
# Domain socket server, used to test that domain sockets
# work on lustre.
#
# Rewrite in Python: Timothy Day <timday@amazon.com>
#

import os
import socket
import sys


# Define a function for logging messages
def logmsg(msg):
	print(f"{sys.argv[0]} {os.getpid()}: {msg} at {os.popen('date').read().strip()}")


# Get the socket path from the command-line argument,
# or ask the user to input one
if len(sys.argv) > 1:
	socket_path = sys.argv[1]
else:
	socket_path = input("Enter socket path: ")

try:
	# Create a Unix domain socket with a specified file path
	sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)

	# Bind the socket to the Unix domain socket file
	sock.bind(socket_path)

	# Listen for incoming connections on the socket
	sock.listen(socket.SOMAXCONN)

	# Fork a child process to handle the connection
	pid = os.fork()

	if pid > 0:
		# Parent process
		logmsg(f"server started on {socket_path}")
		sys.exit(0)
	elif pid < 0:
		# Fork failed
		logmsg(f"fork failed: {pid}")
		sys.exit(1)

	# Accept an incoming connection
	client_sock, _ = sock.accept()

	logmsg(f"connection on {socket_path}")

	# Send a message to the client and close
	# the client socket
	client_sock.send(b"This is a message from the server!\n")
	client_sock.close()

except socket.error as e:
	logmsg(f"Socket error: {e}")

finally:
	sock.close()