import signal
import time
import sys
from testutils import assert_raises
assert_raises(TypeError, lambda: signal.signal(signal.SIGINT, 2))
signals = []
def handler(signum, frame):
signals.append(signum)
signal.signal(signal.SIGILL, signal.SIG_IGN);
assert signal.getsignal(signal.SIGILL) is signal.SIG_IGN
old_signal = signal.signal(signal.SIGILL, signal.SIG_DFL)
assert old_signal is signal.SIG_IGN
assert signal.getsignal(signal.SIGILL) is signal.SIG_DFL
if "win" not in sys.platform:
signal.signal(signal.SIGALRM, handler)
assert signal.getsignal(signal.SIGALRM) is handler
signal.alarm(1)
time.sleep(2.0)
assert signals == [signal.SIGALRM]
signal.signal(signal.SIGALRM, signal.SIG_IGN)
signal.alarm(1)
time.sleep(2.0)
assert signals == [signal.SIGALRM]
signal.signal(signal.SIGALRM, handler)
signal.alarm(1)
time.sleep(2.0)
assert signals == [signal.SIGALRM, signal.SIGALRM]