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70 lines
2.1 KiB
70 lines
2.1 KiB
import errno
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import os
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import sys
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#os.environ['GEVENT_NOWAITPID'] = 'True'
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import gevent
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import gevent.monkey
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gevent.monkey.patch_all()
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pid = None
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awaiting_child = []
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def handle_sigchld(*_args):
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# Make sure we can do a blocking operation
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gevent.sleep()
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# Signal completion
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awaiting_child.pop()
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# Raise an ignored error
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raise TypeError("This should be ignored but printed")
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import signal
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if hasattr(signal, 'SIGCHLD'):
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assert signal.getsignal(signal.SIGCHLD) == signal.SIG_DFL
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signal.signal(signal.SIGCHLD, handle_sigchld)
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handler = signal.getsignal(signal.SIGCHLD)
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assert signal.getsignal(signal.SIGCHLD) is handle_sigchld, handler
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if hasattr(os, 'forkpty'):
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def forkpty():
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# For printing in errors
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return os.forkpty()[0]
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funcs = (os.fork, forkpty)
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else:
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funcs = (os.fork,)
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for func in funcs:
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awaiting_child = [True]
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pid = func()
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if not pid:
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# child
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gevent.sleep(0.3)
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sys.exit(0)
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else:
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timeout = gevent.Timeout(1)
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try:
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while awaiting_child:
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gevent.sleep(0.01)
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# We should now be able to waitpid() for an arbitrary child
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wpid, status = os.waitpid(-1, os.WNOHANG)
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if wpid != pid:
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raise AssertionError("Failed to wait on a child pid forked with a function",
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wpid, pid, func)
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# And a second call should raise ECHILD
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try:
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wpid, status = os.waitpid(-1, os.WNOHANG)
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raise AssertionError("Should not be able to wait again")
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except OSError as e:
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assert e.errno == errno.ECHILD
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except gevent.Timeout as t:
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if timeout is not t:
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raise
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raise AssertionError("Failed to wait using", func)
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finally:
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timeout.close()
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sys.exit(0)
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else:
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print("No SIGCHLD, not testing")
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