def testParallel(self):
"""Test interprocesses actually sync."""
write_lock = locking.PipeLock()
read_lock = locking.PipeLock()
with osutils.TempDir() as tempdir:
# Let the child create a file, but make sure the parent holds us off.
# Then make the parent wait for the child to tell us it's done.
flag_file = os.path.join(tempdir, 'foo')
pid = os.fork()
if pid == 0:
# Child.
# pylint: disable=protected-access
try:
write_lock.Wait()
del write_lock
osutils.Touch(flag_file)
read_lock.Post()
del read_lock
except Exception:
os._exit(1)
finally:
# No matter what happens, we must exit w/out running handlers.
os._exit(0)
else:
# Parent.
time.sleep(0.5)
self.assertNotExists(flag_file)
write_lock.Post()
del write_lock
read_lock.Wait()
del read_lock
self.assertExists(flag_file)
status = os.waitpid(pid, 0)[1]
self.assertEqual(process_util.GetExitStatus(status), 0)
def testSIGKILL(self):
"""Verify harsh signals get decoded."""
status = _SpawnChild(kill_signal=signal.SIGKILL)
ret = process_util.GetExitStatus(status)
self.assertEqual(ret, 128 + signal.SIGKILL)
def testSIGUSR1(self):
"""Verify normal kill signals get decoded."""
status = _SpawnChild(kill_signal=signal.SIGUSR1)
ret = process_util.GetExitStatus(status)
self.assertEqual(ret, 128 + signal.SIGUSR1)
def testExitWeird(self):
"""Verify weird exits (>=128) get decoded."""
status = _SpawnChild(exit_code=150)
ret = process_util.GetExitStatus(status)
self.assertEqual(ret, 150)
def testExitError(self):
"""Verify error exits (>0 && <128) get decoded."""
status = _SpawnChild(exit_code=10)
ret = process_util.GetExitStatus(status)
self.assertEqual(ret, 10)
def testExitNormal(self):
"""Verify normal exits get decoded."""
status = _SpawnChild(exit_code=0)
ret = process_util.GetExitStatus(status)
self.assertEqual(ret, 0)