terminate a linux command line utility from python

Question

I've got a command line utility from canutils called candump. It works like this:

I run candump (specifying the bus from which I want to dump)

root@beaglebone: candump can0

It then runs until I end it using CTRL+C

However, when I run it in a python script like so.

Popen(["candump","can0"],stdout=PIPE)

or

call(["candump","can0"])

I'm not sure how to end it. Any ideas?

Popen.terminate() and Popen.kill() should work if you don't want to use send_signal. Docs — msvalkon
– msvalkon, Commented Mar 6, 2013 at 23:01

Necrolyte2 · Accepted Answer · 2013-03-06 22:59:20Z

3

Don't use use the call command if you want control over the subprocess

If you use Popen like you did above you should assign it to a variable like this:

p = Popen(["candump","can0"],stdout=PIPE)

answered Mar 6, 2013 at 22:59

Necrolyte2

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Comments

nneonneo · Accepted Answer · 2013-03-06 22:59:15Z

2

Use Popen(), and call send_signal(signal.SIGINT) on the returned Popen object.

answered Mar 6, 2013 at 22:59

nneonneo

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