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Start and stop then start again aireplay within a bash script without killing the bash script


kerpap
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hello

I am trying to write a bash script that basically does this:

calls aireplay-ng

runs it for 5 minutes

then stops aireplay

then sleeps for 5 minutes

I have something like this:

while [ true ] 
do
     aireplay-ng -# # -a<MAC> -h<MAC> mon0
     sleep 300
     <somehow stop aireplay>
     sleep 300
done

ive tried using kill a number of ways, ive tried calling xterm -e (aireplay) then try to close it from the script but nothing works

any ideas?

again,

start and run aireplay-ng for 5 minutes

stop aireplay-ng

sleep 5 minutes

then repeat.

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The most trivial solution would look like this:

while [ true ] 
do
     aireplay-ng -# # -a<MAC> -h<MAC> mon0 &
     PID=$!
     sleep 300
     kill $PID
     sleep 300
done

In bash (and pretty much any other derivative of 'sh'), '$!' is a special variable which holds the PID of the last command to be executed in the background (with '&'). Once we have the PID, we can use it to inspect or control that process. For example, by using the 'kill' command to send it a TERMinate signal.

If it were me, I'd write a much more sophisticated function for ensuring that the process actually terminates before the next iteration. (Eg, send a KILL signal if the PID is still active after a reasonable timeout.)

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I'm not a fan of bash scripts, I think you should explore python, perl or ruby...

while true

IO.popen3('airbase-ng wlan0'){|input,output,error,process|

if output.include?('something good')

file.write('log.txt', output)

End

If the application needs input, like reaver ask

Input.include?('Do you want to continue with old session')

input.puts('yes')

End

If error

Puts(' we have a error')

End

Puts (process information)

sleep 60*5

Kill.process

}

End

Edited by i8igmac
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Sounds like you need to explore the

 tag 

The great thing about bash is that it's (more) universal and ubiquitous than the alternatives you suggest, you don't have to learn a new language (everything there works as-is from the command prompt, obviously) and if done properly you can trivially make a nice, concise, readable program that does exactly what you want with very little fuss.

Edited by Cooper
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