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import multiprocessing, time, sys, signal, os, inspect
# Sending SIGTERM will terminate the main process
# but the process running the 'a' function will remain dangling.
def signal_handler(sig, fr):
print(inspect.stack()[0][3])
print('{}: Received {}'.format(os.getpid(), sig))
sys.exit(3)
# the statement below never executes, leaving the process dangling.
# p.terminate()
signal.signal(signal.SIGTERM, signal_handler)
def a(b):
def signal_handler(sig, fr):
print(inspect.stack()[0][3])
print('{}: 2Received {}'.format(os.getpid(), sig))
sys.exit(5)
# The process normally inherits parent signal handler
# but we overwrite it here.
signal.signal(signal.SIGTERM, signal_handler)
while True:
print('{}: {}'.format(os.getpid(), b))
time.sleep(1)
p = multiprocessing.Process(target=a, args=('cool test',))
p.start()
print('PID: {}'.format(os.getpid()))
sys.exit(4)
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