python:send command with subprocess

Question

I am using ipmitool to start an serial over lan connection on the VSP of an HP. I am trying to send the break command with the letter c.

p = subprocess.Popen(CMD + " sol activate", shell=True, stdout=subprocess.PIPE)
#I want to send '~~B' and 'c' while watching the output.
while True:
    output = p.stdout.readline()
    if output:
        print output

you mean you want to interrupt the process?

Jean-François Fabre
– Jean-François Fabre ♦

2017-02-07 13:40:08 +00:00
Commented Feb 7, 2017 at 13:40 — Jean-François Fabre
– Jean-François Fabre ♦, Commented Feb 7, 2017 at 13:40

mdegis · Accepted Answer · 2017-02-07 14:43:28Z

2

As far as I can understand you want pressing "c" button to kill the process that you run with subprocess. Use this recipe to detect key and write simple function to call inside a thread like this:

import subprocess
import os
import signal
import thread
from getch import _Getch

def kill(pro):
    if _Getch()() == "c":
        os.killpg(os.getpgid(pro.pid), signal.SIGTERM)

CMD="sudo apt-get update"
p = subprocess.Popen(CMD, shell=True, stdout=subprocess.PIPE)
thread.start_new_thread(kill, (p,))
while True:
    output = p.stdout.readline()
    if output:
        print output

answered Feb 7, 2017 at 14:43

mdegis

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