51 lines
910 B
Python
51 lines
910 B
Python
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# Test the signal module
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import signal
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import os
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pid = os.getpid()
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# Shell script that will send us asynchronous signals
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script = """
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(
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set -x
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sleep 2
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kill -5 %(pid)d
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sleep 2
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kill -2 %(pid)d
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sleep 2
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kill -3 %(pid)d
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) &
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""" % vars()
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def handlerA(*args):
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print "handlerA", args
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HandlerBCalled = "HandlerBCalled" # Exception
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def handlerB(*args):
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print "handlerB", args
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raise HandlerBCalled, args
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signal.alarm(20) # Entire test lasts at most 20 sec.
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signal.signal(5, handlerA)
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signal.signal(2, handlerB)
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signal.signal(3, signal.SIG_IGN)
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signal.signal(signal.SIGALRM, signal.default_int_handler)
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os.system(script)
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print "starting pause() loop..."
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try:
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while 1:
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print "call pause()..."
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try:
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signal.pause()
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print "pause() returned"
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except HandlerBCalled:
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print "HandlerBCalled exception caught"
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except KeyboardInterrupt:
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print "KeyboardInterrupt (assume the alarm() went off)"
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