I'm stuck at a tricky problem to test whether a daemon thread is running. The daemon thread I made should run at the background to keep the service running, so I do the following to create it and keep it alive:
Creation:
ASThread = threading.Thread(target = initAirserv, args=[],)
ASThread.setDaemon(True)
ASThread.start()
Inside the initAirserv() method:
def initAirserv(self, channel="15"):
interface = self.execAirmon(options="start", interface=self.interface)
port = self.plug_port
if interface != "removed":
if channel=="15":
command = "airserv-ng -d " +str(interface)+" -p "+str(port)
else:
command = "airserv-ng -d " +str(interface)+" -p "+str(port)+" -c"+str(channel)
else:
return None
AServConn=self.init_Plug()
if AServConn:
(stdin, stdout, stderr) = AServConn.exec_command(command)
serv_op = stdout
serv_er = stderr
##### keep the daemon thread run persistently ####
a = 0
while 1:
a += 1
else:
logging.debug( "SSH Error" )
The purpose of the last several lines is to keep the thread busy using a stupid way. However, after starting this daemon thread and I did something else, when I came back and check the thread as follows:
if ASThread.is_alive() == 1:
# do something
the if body never gets executed. Can someone explain to me why does this happen? What's the best way to run a thread which executes something that needs to be busy all the time? Thanks very much.
The posted code doesn't add up. initAirserv as posted is a method on a class, but the initAirserv passed to the Thread constructor is not.
It's also hard to say anything concrete without knowing what execAirmon and init_Plug does, and what else happens in your application.
In general, I'd say you have it right. This should work. The fact that it doesn't means your assumptions are wrong.
execAirmon returns something that is not equal to "removed"?init_Plug returns a non-false object?