You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.7 KiB
85 lines
2.7 KiB
3 years ago
|
import os
|
||
|
|
import signal
|
||
|
|
import subprocess
|
||
|
|
import sys
|
||
|
|
import time
|
||
|
|
import unittest
|
||
|
|
from test import support
|
||
|
|
|
||
|
|
|
||
|
|
class SIGUSR1Exception(Exception):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
class InterProcessSignalTests(unittest.TestCase):
|
||
|
|
def setUp(self):
|
||
|
|
self.got_signals = {'SIGHUP': 0, 'SIGUSR1': 0, 'SIGALRM': 0}
|
||
|
|
|
||
|
|
def sighup_handler(self, signum, frame):
|
||
|
|
self.got_signals['SIGHUP'] += 1
|
||
|
|
|
||
|
|
def sigusr1_handler(self, signum, frame):
|
||
|
|
self.got_signals['SIGUSR1'] += 1
|
||
|
|
raise SIGUSR1Exception
|
||
|
|
|
||
|
|
def wait_signal(self, child, signame):
|
||
|
|
if child is not None:
|
||
|
|
# This wait should be interrupted by exc_class
|
||
|
|
# (if set)
|
||
|
|
child.wait()
|
||
|
|
|
||
|
|
timeout = support.SHORT_TIMEOUT
|
||
|
|
deadline = time.monotonic() + timeout
|
||
|
|
|
||
|
|
while time.monotonic() < deadline:
|
||
|
|
if self.got_signals[signame]:
|
||
|
|
return
|
||
|
|
signal.pause()
|
||
|
|
|
||
|
|
self.fail('signal %s not received after %s seconds'
|
||
|
|
% (signame, timeout))
|
||
|
|
|
||
|
|
def subprocess_send_signal(self, pid, signame):
|
||
|
|
code = 'import os, signal; os.kill(%s, signal.%s)' % (pid, signame)
|
||
|
|
args = [sys.executable, '-I', '-c', code]
|
||
|
|
return subprocess.Popen(args)
|
||
|
|
|
||
|
|
def test_interprocess_signal(self):
|
||
|
|
# Install handlers. This function runs in a sub-process, so we
|
||
|
|
# don't worry about re-setting the default handlers.
|
||
|
|
signal.signal(signal.SIGHUP, self.sighup_handler)
|
||
|
|
signal.signal(signal.SIGUSR1, self.sigusr1_handler)
|
||
|
|
signal.signal(signal.SIGUSR2, signal.SIG_IGN)
|
||
|
|
signal.signal(signal.SIGALRM, signal.default_int_handler)
|
||
|
|
|
||
|
|
# Let the sub-processes know who to send signals to.
|
||
|
|
pid = str(os.getpid())
|
||
|
|
|
||
|
|
with self.subprocess_send_signal(pid, "SIGHUP") as child:
|
||
|
|
self.wait_signal(child, 'SIGHUP')
|
||
|
|
self.assertEqual(self.got_signals, {'SIGHUP': 1, 'SIGUSR1': 0,
|
||
|
|
'SIGALRM': 0})
|
||
|
|
|
||
|
|
with self.assertRaises(SIGUSR1Exception):
|
||
|
|
with self.subprocess_send_signal(pid, "SIGUSR1") as child:
|
||
|
|
self.wait_signal(child, 'SIGUSR1')
|
||
|
|
self.assertEqual(self.got_signals, {'SIGHUP': 1, 'SIGUSR1': 1,
|
||
|
|
'SIGALRM': 0})
|
||
|
|
|
||
|
|
with self.subprocess_send_signal(pid, "SIGUSR2") as child:
|
||
|
|
# Nothing should happen: SIGUSR2 is ignored
|
||
|
|
child.wait()
|
||
|
|
|
||
|
|
try:
|
||
|
|
with self.assertRaises(KeyboardInterrupt):
|
||
|
|
signal.alarm(1)
|
||
|
|
self.wait_signal(None, 'SIGALRM')
|
||
|
|
self.assertEqual(self.got_signals, {'SIGHUP': 1, 'SIGUSR1': 1,
|
||
|
|
'SIGALRM': 0})
|
||
|
|
finally:
|
||
|
|
signal.alarm(0)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
unittest.main()
|