/usr/lib/python3/dist-packages/ipykernel/heartbeat.py is in python3-ipykernel 4.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | """The client and server for a basic ping-pong style heartbeat.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import errno
import os
import socket
from threading import Thread
import zmq
from jupyter_client.localinterfaces import localhost
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class Heartbeat(Thread):
"A simple ping-pong style heartbeat that runs in a thread."
def __init__(self, context, addr=None):
if addr is None:
addr = ('tcp', localhost(), 0)
Thread.__init__(self)
self.context = context
self.transport, self.ip, self.port = addr
if self.port == 0:
if addr[0] == 'tcp':
s = socket.socket()
# '*' means all interfaces to 0MQ, which is '' to socket.socket
s.bind(('' if self.ip == '*' else self.ip, 0))
self.port = s.getsockname()[1]
s.close()
elif addr[0] == 'ipc':
self.port = 1
while os.path.exists("%s-%s" % (self.ip, self.port)):
self.port = self.port + 1
else:
raise ValueError("Unrecognized zmq transport: %s" % addr[0])
self.addr = (self.ip, self.port)
self.daemon = True
def run(self):
self.socket = self.context.socket(zmq.ROUTER)
self.socket.linger = 1000
c = ':' if self.transport == 'tcp' else '-'
self.socket.bind('%s://%s' % (self.transport, self.ip) + c + str(self.port))
while True:
try:
zmq.device(zmq.QUEUE, self.socket, self.socket)
except zmq.ZMQError as e:
if e.errno == errno.EINTR:
continue
else:
raise
else:
break
|