ComputerCraft IRC server

-- irc server v1 by username6
rednet.open("left")
print("Starting server")
sleep(0.1)
print(".")
rednet.host("ircChannel", "ircServer")
print(".")
sleep(0.2)
print(".")
print("Server started with protocol 'ircChannel' and hostname 'ircServer'.")
print("In server terminal. Call exit to shutdown")
write("SRV>")
input = read()
if input == "exit" then
rednet.unhost("ircChannel","ircServer")
rednet.close("left")
print("Shutting down...")
sleep(3)
os.shutdown()
else
print("Error! Unknown command!")
end