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import os, py, sys
import signal as cpy_signal
class TestCheckSignals:
spaceconfig = dict(usemodules=['signal'])
def setup_class(cls):
if not hasattr(os, 'kill') or not hasattr(os, 'getpid'):
py.test.skip("requires os.kill() and os.getpid()")
if not hasattr(cpy_signal, 'SIGUSR1'):
py.test.skip("requires SIGUSR1 in signal")
def test_checksignals(self):
space = self.space
w_received = space.appexec([], """():
import _signal as signal
received = []
def myhandler(signum, frame):
received.append(signum)
signal.signal(signal.SIGUSR1, myhandler)
return received""")
#
assert not space.is_true(w_received)
#
# send the signal now
os.kill(os.getpid(), cpy_signal.SIGUSR1)
#
# myhandler() should not be immediately called
assert not space.is_true(w_received)
#
# calling ec.checksignals() should call it
space.getexecutioncontext().checksignals()
assert space.is_true(w_received)
class AppTestSignal:
spaceconfig = {
"usemodules": ['signal', 'time'] + (['fcntl'] if os.name != 'nt' else []),
}
def setup_class(cls):
cls.w_temppath = cls.space.wrap(
str(py.test.ensuretemp("signal").join("foo.txt")))
cls.w_appdirect = cls.space.wrap(cls.runappdirect)
def test_exported_names(self):
import os, _signal
_signal.__dict__ # crashes if the interpleveldefs are invalid
if os.name == 'nt':
assert _signal.CTRL_BREAK_EVENT == 1
assert _signal.CTRL_C_EVENT == 0
def test_basics(self):
import types, os, _signal
if not hasattr(os, 'kill') or not hasattr(os, 'getpid'):
skip("requires os.kill() and os.getpid()")
signal = _signal # the signal module to test
if not hasattr(signal, 'SIGUSR1'):
skip("requires SIGUSR1 in signal")
signum = signal.SIGUSR1
received = []
def myhandler(signum, frame):
assert isinstance(frame, types.FrameType)
received.append(signum)
signal.signal(signum, myhandler)
os.kill(os.getpid(), signum)
# the signal should be delivered to the handler immediately
assert received == [signum]
del received[:]
os.kill(os.getpid(), signum)
# the signal should be delivered to the handler immediately
assert received == [signum]
del received[:]
signal.signal(signum, signal.SIG_IGN)
os.kill(os.getpid(), signum)
for i in range(10000):
# wait a bit - signal should not arrive
if received:
break
assert received == []
signal.signal(signum, signal.SIG_DFL)
def test_default_return(self):
"""
Test that signal.signal returns SIG_DFL if that is the current handler.
"""
from _signal import signal, SIGINT, SIG_DFL, SIG_IGN
try:
for handler in SIG_DFL, SIG_IGN, lambda *a: None:
signal(SIGINT, SIG_DFL)
assert signal(SIGINT, handler) == SIG_DFL
finally:
signal(SIGINT, SIG_DFL)
def test_ignore_return(self):
"""
Test that signal.signal returns SIG_IGN if that is the current handler.
"""
from _signal import signal, SIGINT, SIG_DFL, SIG_IGN
try:
for handler in SIG_DFL, SIG_IGN, lambda *a: None:
signal(SIGINT, SIG_IGN)
assert signal(SIGINT, handler) == SIG_IGN
finally:
signal(SIGINT, SIG_DFL)
def test_obj_return(self):
"""
Test that signal.signal returns a Python object if one is the current
handler.
"""
from _signal import signal, SIGINT, SIG_DFL, SIG_IGN
def installed(*a):
pass
try:
for handler in SIG_DFL, SIG_IGN, lambda *a: None:
signal(SIGINT, installed)
assert signal(SIGINT, handler) is installed
finally:
signal(SIGINT, SIG_DFL)
def test_getsignal(self):
"""
Test that signal.getsignal returns the currently installed handler.
"""
from _signal import getsignal, signal, SIGINT, SIG_DFL, SIG_IGN
def handler(*a):
pass
try:
if not self.appdirect:
assert getsignal(SIGINT) == SIG_DFL
signal(SIGINT, SIG_DFL)
assert getsignal(SIGINT) == SIG_DFL
signal(SIGINT, SIG_IGN)
assert getsignal(SIGINT) == SIG_IGN
signal(SIGINT, handler)
assert getsignal(SIGINT) is handler
finally:
signal(SIGINT, SIG_DFL)
def test_check_signum(self):
import sys
from _signal import getsignal, signal, NSIG
# signum out of range fails
raises(ValueError, getsignal, NSIG)
raises(ValueError, signal, NSIG, lambda *args: None)
# on windows invalid signal within range should pass getsignal but fail signal
if sys.platform == 'win32':
assert getsignal(7) == None
raises(ValueError, signal, 7, lambda *args: None)
def test_alarm(self):
try:
from _signal import alarm, signal, SIG_DFL, SIGALRM
except:
skip('no alarm on this platform')
import time
l = []
def handler(*a):
l.append(42)
try:
signal(SIGALRM, handler)
alarm(1)
time.sleep(2)
assert l == [42]
alarm(0)
assert l == [42]
finally:
signal(SIGALRM, SIG_DFL)
def test_set_wakeup_fd(self):
try:
import _signal as signal, posix, fcntl
except ImportError:
skip('cannot import posix or fcntl')
def myhandler(signum, frame):
pass
signal.signal(signal.SIGINT, myhandler)
#
def cannot_read():
try:
posix.read(fd_read, 1)
except OSError:
pass
else:
raise AssertionError("os.read(fd_read, 1) succeeded?")
#
fd_read, fd_write = posix.pipe()
flags = fcntl.fcntl(fd_write, fcntl.F_GETFL, 0)
flags = flags | posix.O_NONBLOCK
fcntl.fcntl(fd_write, fcntl.F_SETFL, flags)
flags = fcntl.fcntl(fd_read, fcntl.F_GETFL, 0)
flags = flags | posix.O_NONBLOCK
fcntl.fcntl(fd_read, fcntl.F_SETFL, flags)
#
old_wakeup = signal.set_wakeup_fd(fd_write)
try:
cannot_read()
posix.kill(posix.getpid(), signal.SIGINT)
res = posix.read(fd_read, 1)
assert res == bytes([signal.SIGINT])
cannot_read()
finally:
old_wakeup = signal.set_wakeup_fd(old_wakeup)
#
signal.signal(signal.SIGINT, signal.SIG_DFL)
def test_set_wakeup_fd_invalid(self):
import _signal as signal
with open(self.temppath, 'wb') as f:
fd = f.fileno()
raises(ValueError, signal.set_wakeup_fd, fd)
def test_siginterrupt(self):
import _signal as signal, os, time
if not hasattr(signal, 'siginterrupt'):
skip('non siginterrupt in signal')
signum = signal.SIGUSR1
def readpipe_is_not_interrupted():
# from CPython's test_signal.readpipe_interrupted()
r, w = os.pipe()
ppid = os.getpid()
pid = os.fork()
if pid == 0:
try:
time.sleep(1)
os.kill(ppid, signum)
time.sleep(1)
finally:
os._exit(0)
else:
try:
os.close(w)
# we expect not to be interrupted. If we are, the
# following line raises OSError(EINTR).
os.read(r, 1)
finally:
os.waitpid(pid, 0)
os.close(r)
#
oldhandler = signal.signal(signum, lambda x,y: None)
try:
signal.siginterrupt(signum, 0)
readpipe_is_not_interrupted()
readpipe_is_not_interrupted()
finally:
signal.signal(signum, oldhandler)
def test_default_int_handler(self):
import signal
for args in [(), (1, 2)]:
try:
signal.default_int_handler(*args)
except KeyboardInterrupt:
pass
else:
raise AssertionError("did not raise!")
class AppTestSignalSocket:
spaceconfig = dict(usemodules=['signal', '_socket'])
def test_alarm_raise(self):
try:
from _signal import alarm, signal, SIG_DFL, SIGALRM
except ImportError:
skip("no SIGALRM on this platform")
import _socket
class Alarm(Exception):
pass
def handler(*a):
raise Alarm()
s = _socket.socket()
s.listen(1)
try:
signal(SIGALRM, handler)
alarm(1)
try:
s._accept()
except Alarm:
pass
else:
raise Exception("should have raised Alarm")
alarm(0)
finally:
signal(SIGALRM, SIG_DFL)
class AppTestItimer:
spaceconfig = dict(usemodules=['signal'])
def setup_class(cls):
if sys.platform == 'win32':
py.test.skip("Unix only")
def test_itimer_real(self):
import _signal as signal
def sig_alrm(*args):
self.called = True
signal.signal(signal.SIGALRM, sig_alrm)
old = signal.setitimer(signal.ITIMER_REAL, 1.0)
assert old == (0, 0)
val, interval = signal.getitimer(signal.ITIMER_REAL)
assert val <= 1.0
assert interval == 0.0
signal.pause()
assert self.called
def test_itimer_exc(self):
import _signal as signal
raises(signal.ItimerError, signal.setitimer, -1, 0)
class AppTestPThread:
spaceconfig = dict(usemodules=['signal', 'thread', 'time'])
def test_pthread_kill(self):
import _signal as signal
import _thread
signum = signal.SIGUSR1
def handler(signum, frame):
1/0
signal.signal(signum, handler)
tid = _thread.get_ident()
raises(ZeroDivisionError, signal.pthread_kill, tid, signum)
def test_sigwait(self):
import _signal as signal
def handler(signum, frame):
1/0
signal.signal(signal.SIGALRM, handler)
signal.alarm(1)
received = signal.sigwait([signal.SIGALRM])
assert received == signal.SIGALRM
def test_sigmask(self):
import _signal as signal, posix
signum1 = signal.SIGUSR1
signum2 = signal.SIGUSR2
def handler(signum, frame):
pass
signal.signal(signum1, handler)
signal.signal(signum2, handler)
signal.pthread_sigmask(signal.SIG_BLOCK, (signum1, signum2))
posix.kill(posix.getpid(), signum1)
posix.kill(posix.getpid(), signum2)
assert signal.sigpending() == set((signum1, signum2))
# Unblocking the 2 signals calls the C signal handler twice
signal.pthread_sigmask(signal.SIG_UNBLOCK, (signum1, signum2))
assert signal.sigpending() == set()
|
