def receive_signal(cls, handle=(2, 15), ignore=(1,), func=None):
"""Receive the Linux signal
"""
# Check the signal processing
if not isinstance(handle, list) and not isinstance(handle, tuple):
raise ValueError("The handle '%s' is not a list or tuple" % handle)
for sig in handle:
result = explain(sig)
signal_name = getattr(signal, result["signal"])
signal.signal(signal_name, ReceiveSignal.signal_handler)
ReceiveSignal.SIGN_HANDLE = handle
# Check ignore signal
if not isinstance(ignore, list) and not isinstance(ignore, tuple):
raise ValueError("The ignore '%s' is not a list or tuple" % ignore)
for sig in ignore:
result = explain(sig)
signal_name = getattr(signal, result["signal"])
signal.signal(signal_name, ReceiveSignal.signal_handler)
ReceiveSignal.SIGN_IGNORE = ignore
# Check function
if func:
result = callable(func)
if not result:
raise AttributeError("Function '%s' can not be called" % func)
ReceiveSignal.SIGN_FUNC = func
if ReceiveSignal.SIGN_FUNC:
lg.info("Receive system signals, handle signals %s, ignore "
"signals %s, signal processing function '%s'" %
(handle, ignore, func.__name__))
else:
lg.info("Receive system signals, handle signals %s, ignore "
"signals %s, signal processing function '%s'" %
(handle, ignore, func))
def test_explain():
assert explain(13, signals=SIGNALS) == {
'action': 'Action',
'description': 'Desc',
'id': 13,
'signal': 'SIGNAL',
}
def test_explain():
assert explain(13, signals=SIGNALS) == {
'action': 'Action',
'description': 'Desc',
'id': 13,
'signal': 'SIGNAL',
}
def signal_handler(sig, frame):
"""Receive system signal
:param sig: Signal value
:param frame:
:return: None
"""
# Get signal info
sig_info = explain(sig)
# Ignore signal processing
if sig in ReceiveSignal.SIGN_IGNORE:
sig_info["action"] = "ignore"
lg.warning("Received system signal: %s, at frame: %s" %
(sig_info, frame.f_code))
# Stop the process of the signal
if sig in ReceiveSignal.SIGN_HANDLE:
sig_info["action"] = "stop"
# Exit process
# Receive Signal
ReceiveSignal.EXIT_FLAG = True
ReceiveSignal.EXIT_SIGN = sig
lg.warning("Received system signal: %s, at frame: %s, stop program..." %
(sig_info, frame.f_code))
# Execute stop function
if ReceiveSignal.SIGN_FUNC:
lg.info("Execute stop function '%s'" %
ReceiveSignal.SIGN_FUNC.__name__)
ReceiveSignal.SIGN_FUNC()
def explain_signal(self):
"""
Explains (provides the name, the description,
and the default action of) the signal that
killed the process.
"""
status = self.status_code
if status and status < 0:
return explain(abs(status))
def explain_signal(self):
"""
Explains (provides the name, the description,
and the default action of) the signal that
killed the process.
"""
status = self.status_code
if status and status < 0:
return explain(abs(status))
def test_explain_fake():
with raises(NoSuchSignal):
explain(0, signals=SIGNALS)
def test_search(signal, action):
assert search(signal=signal, action=action,
signals=SIGNALS) == [explain(13, signals=SIGNALS)]
def test_explain_fake():
with raises(NoSuchSignal):
explain(0, signals=SIGNALS)
def test_search(signal, action):
assert search(signal=signal,
action=action,
signals=SIGNALS) == [explain(13, signals=SIGNALS)]