Python SIGTERM not killing subprocess -
i have class can start , close process. seems not close process.
my python code, there other methods work fine.:
class kismetinstance: """creates kismet_server instance""" def __init__(self, value=false): logging.basicconfig(format='%(asctime)-15s::: %(message)s') self.logger = logging.getlogger('kismet_instance') self.example = value def __create_kismet_instance__(self): """ create kismet_server subprocess. :return: """ shell = ['sudo', '/usr/local/bin/kismet_server'] self.logger.debug('attempting run: %s', " ".join(shell)) self.kismet = popen(shell, stdin=pipe, stdout=pipe, stderr=pipe, cwd=r'./logs', preexec_fn=os.setsid) def __destroy_kismet_instance__(self): """ kill subprocess :return: """ os.killpg(os.getpgid(self.kismet.pid), 15) it can create subprocess fine. error when try kill (no sudo)
oserror: [errno 1] operation not permitted and if run sudo, process still running afterwards.
pi@raspberrypi ~/project $ ps -a | grep 'kismet' 2912 ? 00:00:00 kismet_server
i managed fix this. turns out subprocess respawning creating weird prevented python keeping track of it.
so had fix it, however not elegant solution, , rather dangerouddangerous.
be careful if use this, because if enter term more broad mine ('kismet') kill lot of processes on system.
def __destroy_kismet_instance__(self): """ kill subprocess :return: """ sig = signal.sigkill # signal send os.killpg(os.getpgid(self.kismet.pid), sig) # kill 1 of them p_list = subprocess.popen(['ps', '-a'], stdout=subprocess.pipe) # processes on system out, err = p_list.communicate() line in out.splitlines(): # each line (or process) if 'kismet' in line: # if 'kismet' appears in name pid = int(line.split(none, 1)[0]) # process id self.logger.debug("found: %d", pid) os.killpg(os.getpgid(pid), sig) # kill process
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