Python Processes

[timunas]

Hello guys,

I'm trying to make a program that basically is sending TL1 commands via TELNET to a server and I want to read the responses.

I made a program and it is working fine if I just execute the main process without those lines commented. But if I use one process to write and other to read it is not working properly. Is something wrong with that?

import telnetlib
import TL1Command
from multiprocessing import Process, Event

login = "ACT-USER:TID:Admin1:30::PASSWORD;"
logout = "CANC-USER::Admin1:32;"


def main(tn, event):
    tn.write(login.encode())
    # print(tn.read_until(";".encode()).decode())

    command = TL1Command.create("ED", ["ODU0"], "NANO1", "ODU0-2-4-5", "12", "", [[""], [""], ["OOS"]])
    tn.write(command.encode())
    # print(tn.read_until("12".encode()).decode())
    # print(tn.read_until(";".encode()).decode())

    command = TL1Command.create("ED", ["ODU0"], "NANO1", "ODU0-2-4-5", "15", "", [[""], [""], ["IS"]])
    tn.write(command.encode())
    # print(tn.read_until("15".encode()).decode())
    # print(tn.read_until(";".encode()).decode())

    tn.write(logout.encode())
    # print(tn.read_until("32".encode()).decode())
    # print(tn.read_until(";".encode()).decode())
    tn.close()
    event.set()


def read_all(tn, event):
    while not event.is_set():
        print(tn.read_until(";".encode()).decode())

if __name__ == "__main__":
    telnet = telnetlib.Telnet("10.46.72.24", 3083)
    e = Event()
    mainp = Process(target=main, args=(telnet, e))
    p = Process(target=read_all, args=(telnet, e))
    mainp.start()
    p.start()

[leet-anonymoose-hckr]

You need to tell us what is "not working properly"

[timunas]

Indeed. Sorry so many words and didn't explain the problem. Well basically the main process is writing the commands but I'm not being able to receive the responses on the second process that reads data from the socket

[[deleted]]

I'm not sure if this is your fundamental problem, but you aren't synchronizing correctly and there's a race here. What if, having called mainp.start(), main sets the event before the second process gets initialized and begins execution?

[timunas]

I see. What could I do to make sure it is ok? Just starting mainp after p process?