bpo-33332: Add signal.valid_signals() (GH-6581)
This commit is contained in:
Antoine Pitrou
GitHub
parent
491bbedc20
commit
9d3627e311
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@ -216,6 +216,15 @@ The :mod:`signal` module defines the following functions:
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.. versionadded:: 3.8
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.. function:: valid_signals()
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Return the set of valid signal numbers on this platform. This can be
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less than ``range(1, NSIG)`` if some signals are reserved by the system
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for internal use.
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.. versionadded:: 3.8
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.. function:: pause()
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Cause the process to sleep until a signal is received; the appropriate handler
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@ -268,8 +277,8 @@ The :mod:`signal` module defines the following functions:
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argument.
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*mask* is a set of signal numbers (e.g. {:const:`signal.SIGINT`,
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:const:`signal.SIGTERM`}). Use ``range(1, signal.NSIG)`` for a full mask
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including all signals.
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:const:`signal.SIGTERM`}). Use :func:`~signal.valid_signals` for a full
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mask including all signals.
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For example, ``signal.pthread_sigmask(signal.SIG_BLOCK, [])`` reads the
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signal mask of the calling thread.
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@ -167,8 +167,8 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
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if not isinstance(sig, int):
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raise TypeError(f'sig must be an int, not {sig!r}')
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if not (1 <= sig < signal.NSIG):
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raise ValueError(f'sig {sig} out of range(1, {signal.NSIG})')
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if sig not in signal.valid_signals():
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raise ValueError(f'invalid signal number {sig}')
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def _make_read_pipe_transport(self, pipe, protocol, waiter=None,
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extra=None):
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@ -136,7 +136,7 @@ class _ResourceSharer(object):
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def _serve(self):
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if hasattr(signal, 'pthread_sigmask'):
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signal.pthread_sigmask(signal.SIG_BLOCK, range(1, signal.NSIG))
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signal.pthread_sigmask(signal.SIG_BLOCK, signal.valid_signals())
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while 1:
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try:
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with self._listener.accept() as conn:
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@ -65,8 +65,7 @@ if 'pthread_sigmask' in _globals:
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if 'sigpending' in _globals:
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@_wraps(_signal.sigpending)
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def sigpending():
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sigs = _signal.sigpending()
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return set(_int_to_enum(x, Signals) for x in sigs)
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return {_int_to_enum(x, Signals) for x in _signal.sigpending()}
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if 'sigwait' in _globals:
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@ -76,4 +75,11 @@ if 'sigwait' in _globals:
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return _int_to_enum(retsig, Signals)
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sigwait.__doc__ = _signal.sigwait
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if 'valid_signals' in _globals:
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@_wraps(_signal.valid_signals)
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def valid_signals():
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return {_int_to_enum(x, Signals) for x in _signal.valid_signals()}
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del _globals, _wraps
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@ -2810,7 +2810,7 @@ class SaveSignals:
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def __init__(self):
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import signal
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self.signal = signal
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self.signals = list(range(1, signal.NSIG))
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self.signals = signal.valid_signals()
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# SIGKILL and SIGSTOP signals cannot be ignored nor caught
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for signame in ('SIGKILL', 'SIGSTOP'):
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try:
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@ -69,6 +69,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_add_signal_handler_setup_error(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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m_signal.set_wakeup_fd.side_effect = ValueError
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self.assertRaises(
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@ -96,6 +97,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_add_signal_handler(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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cb = lambda: True
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self.loop.add_signal_handler(signal.SIGHUP, cb)
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@ -106,6 +108,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_add_signal_handler_install_error(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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def set_wakeup_fd(fd):
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if fd == -1:
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@ -125,6 +128,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.base_events.logger')
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def test_add_signal_handler_install_error2(self, m_logging, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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class Err(OSError):
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errno = errno.EINVAL
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@ -145,6 +149,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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errno = errno.EINVAL
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m_signal.signal.side_effect = Err
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.assertRaises(
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RuntimeError,
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@ -156,6 +161,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_remove_signal_handler(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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@ -170,6 +176,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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def test_remove_signal_handler_2(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.SIGINT = signal.SIGINT
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGINT, lambda: True)
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self.loop._signal_handlers[signal.SIGHUP] = object()
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@ -187,6 +194,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.base_events.logger')
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def test_remove_signal_handler_cleanup_error(self, m_logging, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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m_signal.set_wakeup_fd.side_effect = ValueError
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@ -197,6 +205,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_remove_signal_handler_error(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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m_signal.signal.side_effect = OSError
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@ -207,6 +216,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_remove_signal_handler_error2(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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class Err(OSError):
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@ -219,6 +229,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_close(self, m_signal):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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self.loop.add_signal_handler(signal.SIGCHLD, lambda: True)
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@ -236,6 +247,7 @@ class SelectorEventLoopSignalTests(test_utils.TestCase):
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@mock.patch('asyncio.unix_events.signal')
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def test_close_on_finalizing(self, m_signal, m_sys):
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m_signal.NSIG = signal.NSIG
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m_signal.valid_signals = signal.valid_signals
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self.loop.add_signal_handler(signal.SIGHUP, lambda: True)
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self.assertEqual(len(self.loop._signal_handlers), 1)
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@ -67,9 +67,28 @@ class PosixTests(unittest.TestCase):
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script = os.path.join(dirname, 'signalinterproctester.py')
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assert_python_ok(script)
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def test_valid_signals(self):
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s = signal.valid_signals()
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self.assertIsInstance(s, set)
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self.assertIn(signal.Signals.SIGINT, s)
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self.assertIn(signal.Signals.SIGALRM, s)
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self.assertNotIn(0, s)
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self.assertNotIn(signal.NSIG, s)
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self.assertLess(len(s), signal.NSIG)
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@unittest.skipUnless(sys.platform == "win32", "Windows specific")
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class WindowsSignalTests(unittest.TestCase):
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def test_valid_signals(self):
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s = signal.valid_signals()
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self.assertIsInstance(s, set)
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self.assertGreaterEqual(len(s), 6)
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self.assertIn(signal.Signals.SIGINT, s)
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self.assertNotIn(0, s)
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self.assertNotIn(signal.NSIG, s)
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self.assertLess(len(s), signal.NSIG)
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def test_issue9324(self):
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# Updated for issue #10003, adding SIGBREAK
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handler = lambda x, y: None
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@ -922,6 +941,17 @@ class PendingSignalsTests(unittest.TestCase):
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self.assertRaises(TypeError, signal.pthread_sigmask, 1)
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self.assertRaises(TypeError, signal.pthread_sigmask, 1, 2, 3)
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self.assertRaises(OSError, signal.pthread_sigmask, 1700, [])
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with self.assertRaises(ValueError):
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signal.pthread_sigmask(signal.SIG_BLOCK, [signal.NSIG])
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@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
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'need signal.pthread_sigmask()')
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def test_pthread_sigmask_valid_signals(self):
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s = signal.pthread_sigmask(signal.SIG_BLOCK, signal.valid_signals())
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self.addCleanup(signal.pthread_sigmask, signal.SIG_SETMASK, s)
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# Get current blocked set
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s = signal.pthread_sigmask(signal.SIG_UNBLOCK, signal.valid_signals())
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self.assertLessEqual(s, signal.valid_signals())
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@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
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'need signal.pthread_sigmask()')
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@ -0,0 +1,2 @@
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Add ``signal.valid_signals()`` to expose the POSIX sigfillset()
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functionality.
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@ -341,6 +341,31 @@ PyDoc_STRVAR(signal_sigwait__doc__,
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#endif /* defined(HAVE_SIGWAIT) */
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#if (defined(HAVE_SIGFILLSET) || defined(MS_WINDOWS))
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PyDoc_STRVAR(signal_valid_signals__doc__,
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"valid_signals($module, /)\n"
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"--\n"
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"\n"
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"Return a set of valid signal numbers on this platform.\n"
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"\n"
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"The signal numbers returned by this function can be safely passed to\n"
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"functions like `pthread_sigmask`.");
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#define SIGNAL_VALID_SIGNALS_METHODDEF \
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{"valid_signals", (PyCFunction)signal_valid_signals, METH_NOARGS, signal_valid_signals__doc__},
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static PyObject *
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signal_valid_signals_impl(PyObject *module);
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static PyObject *
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signal_valid_signals(PyObject *module, PyObject *Py_UNUSED(ignored))
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{
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return signal_valid_signals_impl(module);
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}
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#endif /* (defined(HAVE_SIGFILLSET) || defined(MS_WINDOWS)) */
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#if defined(HAVE_SIGWAITINFO)
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PyDoc_STRVAR(signal_sigwaitinfo__doc__,
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@ -459,6 +484,10 @@ exit:
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#define SIGNAL_SIGWAIT_METHODDEF
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#endif /* !defined(SIGNAL_SIGWAIT_METHODDEF) */
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#ifndef SIGNAL_VALID_SIGNALS_METHODDEF
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#define SIGNAL_VALID_SIGNALS_METHODDEF
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#endif /* !defined(SIGNAL_VALID_SIGNALS_METHODDEF) */
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#ifndef SIGNAL_SIGWAITINFO_METHODDEF
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#define SIGNAL_SIGWAITINFO_METHODDEF
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#endif /* !defined(SIGNAL_SIGWAITINFO_METHODDEF) */
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@ -470,4 +499,4 @@ exit:
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#ifndef SIGNAL_PTHREAD_KILL_METHODDEF
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#define SIGNAL_PTHREAD_KILL_METHODDEF
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#endif /* !defined(SIGNAL_PTHREAD_KILL_METHODDEF) */
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/*[clinic end generated code: output=7b41486acf93aa8e input=a9049054013a1b77]*/
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/*[clinic end generated code: output=f35d79e0cfee3f1b input=a9049054013a1b77]*/
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@ -841,11 +841,21 @@ iterable_to_sigset(PyObject *iterable, sigset_t *mask)
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if (signum == -1 && PyErr_Occurred())
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goto error;
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if (0 < signum && signum < NSIG) {
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/* bpo-33329: ignore sigaddset() return value as it can fail
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* for some reserved signals, but we want the `range(1, NSIG)`
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* idiom to allow selecting all valid signals.
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if (sigaddset(mask, (int)signum)) {
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if (errno != EINVAL) {
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/* Probably impossible */
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PyErr_SetFromErrno(PyExc_OSError);
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goto error;
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}
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/* For backwards compatibility, allow idioms such as
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* `range(1, NSIG)` but warn about invalid signal numbers
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*/
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(void) sigaddset(mask, (int)signum);
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const char *msg =
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"invalid signal number %ld, please use valid_signals()";
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if (PyErr_WarnFormat(PyExc_RuntimeWarning, 1, msg, signum)) {
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goto error;
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}
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}
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}
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else {
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PyErr_Format(PyExc_ValueError,
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@ -1001,6 +1011,47 @@ signal_sigwait(PyObject *module, PyObject *sigset)
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#endif /* #ifdef HAVE_SIGWAIT */
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#if defined(HAVE_SIGFILLSET) || defined(MS_WINDOWS)
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/*[clinic input]
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signal.valid_signals
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Return a set of valid signal numbers on this platform.
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The signal numbers returned by this function can be safely passed to
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functions like `pthread_sigmask`.
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[clinic start generated code]*/
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static PyObject *
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signal_valid_signals_impl(PyObject *module)
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/*[clinic end generated code: output=1609cffbcfcf1314 input=86a3717ff25288f2]*/
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{
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#ifdef MS_WINDOWS
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#ifdef SIGBREAK
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PyObject *tup = Py_BuildValue("(iiiiiii)", SIGABRT, SIGBREAK, SIGFPE,
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SIGILL, SIGINT, SIGSEGV, SIGTERM);
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#else
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PyObject *tup = Py_BuildValue("(iiiiii)", SIGABRT, SIGFPE, SIGILL,
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SIGINT, SIGSEGV, SIGTERM);
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#endif
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if (tup == NULL) {
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return NULL;
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}
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PyObject *set = PySet_New(tup);
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Py_DECREF(tup);
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return set;
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#else
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sigset_t mask;
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if (sigemptyset(&mask) || sigfillset(&mask)) {
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return PyErr_SetFromErrno(PyExc_OSError);
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}
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return sigset_to_set(mask);
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#endif
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}
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#endif /* #if defined(HAVE_SIGFILLSET) || defined(MS_WINDOWS) */
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#if defined(HAVE_SIGWAITINFO) || defined(HAVE_SIGTIMEDWAIT)
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static int initialized;
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static PyStructSequence_Field struct_siginfo_fields[] = {
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@ -1225,6 +1276,9 @@ static PyMethodDef signal_methods[] = {
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SIGNAL_SIGWAIT_METHODDEF
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SIGNAL_SIGWAITINFO_METHODDEF
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SIGNAL_SIGTIMEDWAIT_METHODDEF
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#if defined(HAVE_SIGFILLSET) || defined(MS_WINDOWS)
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SIGNAL_VALID_SIGNALS_METHODDEF
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#endif
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{NULL, NULL} /* sentinel */
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};
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@ -1,6 +1,6 @@
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# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
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# generated automatically by aclocal 1.15 -*- Autoconf -*-
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# Copyright (C) 1996-2017 Free Software Foundation, Inc.
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# Copyright (C) 1996-2014 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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@ -12,9 +12,9 @@
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# PARTICULAR PURPOSE.
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m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
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# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
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# serial 12 (pkg-config-0.29.2)
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dnl pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
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dnl serial 11 (pkg-config-0.29.1)
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dnl
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dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
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dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
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dnl
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@ -55,7 +55,7 @@ dnl
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dnl See the "Since" comment for each macro you use to see what version
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dnl of the macros you require.
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m4_defun([PKG_PREREQ],
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[m4_define([PKG_MACROS_VERSION], [0.29.2])
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[m4_define([PKG_MACROS_VERSION], [0.29.1])
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m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
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[m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
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])dnl PKG_PREREQ
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@ -156,7 +156,7 @@ AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
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|||
AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
|
||||
|
||||
pkg_failed=no
|
||||
AC_MSG_CHECKING([for $2])
|
||||
AC_MSG_CHECKING([for $1])
|
||||
|
||||
_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
|
||||
_PKG_CONFIG([$1][_LIBS], [libs], [$2])
|
||||
|
|
|
|||
|
|
@ -11259,7 +11259,7 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
|
|||
setlocale setregid setreuid setresuid setresgid setsid setpgid setpgrp setpriority setuid setvbuf \
|
||||
sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
|
||||
sched_rr_get_interval \
|
||||
sigaction sigaltstack siginterrupt sigpending sigrelse \
|
||||
sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
|
||||
sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
|
||||
sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
|
||||
truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
|
||||
|
|
|
|||
|
|
@ -3474,7 +3474,7 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
|
|||
setlocale setregid setreuid setresuid setresgid setsid setpgid setpgrp setpriority setuid setvbuf \
|
||||
sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
|
||||
sched_rr_get_interval \
|
||||
sigaction sigaltstack siginterrupt sigpending sigrelse \
|
||||
sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
|
||||
sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
|
||||
sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
|
||||
truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
|
||||
|
|
|
|||
|
|
@ -896,6 +896,9 @@
|
|||
/* Define to 1 if you have the `sigaltstack' function. */
|
||||
#undef HAVE_SIGALTSTACK
|
||||
|
||||
/* Define to 1 if you have the `sigfillset' function. */
|
||||
#undef HAVE_SIGFILLSET
|
||||
|
||||
/* Define to 1 if `si_band' is a member of `siginfo_t'. */
|
||||
#undef HAVE_SIGINFO_T_SI_BAND
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue