Linux command output not working

[adam2020]

Hi guys,

I am working on a network analysis tool for a project in college, I am using airodump-ng to find all networks in the general area,

when I run the following command airodump-ng wlan0 --write tempfile --output-format' in the python script nothing gets created but when I run it manually a csv file with the output will be created

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from subprocess import Popen,PIPE import sys,os import csv                  def execute_command(command):         process = Popen(command,stdout=PIPE,stder=PIPE)         return process.communicate()     tempfile = "\root\Desktop\networks # instance of WPA class test_WPA created, only execute_command method is of relevance     out,err = test_WPA.execute_command(['airodump-ng','wlan0','--write',tempfile,'--output-format','csv'])

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it does seem to be working now after I put my wireless card in

I changed the code a bit and made airodump-ng run in another thread

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command = ['airodump-ng','wlan0','--write',tempfile,'--output-format','csv'] thread = threading.Thread(target= test_WPA.execute_command,args= (command, )) thread.start() thread.join(1)

the great thing it now creates the file, but the the process remains open I want the airodump-ng(thread) to stop running after 30 seconds, should set thread to be a daemon thread?? or is there another way I can get airodump to stop running after 30 seconds?

thanks

[DeaD_EyE]

No threads needed

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import time     def execute_command(command):         process = Popen(command,stdout=PIPE,stder=PIPE)         time.sleep(10)         process.terminate()

The call communicate blocks until the process has been finished.
If you don't terminate the process, then it's running in the background and does not block.
In the case of a long running background process, you should return proc in your function.

[adam2020]

thanks DeadEye

to get the output could I still do vv

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time.sleep(10) stdout,stderr = process.communicate() process.terminate() return stdout,stderr

this way I can still get the output from process.communicate() and return stdout and stderr respective outputs and also terminate the process