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- # Test the signal module
- from test.test_support import verbose, TestSkipped, TestFailed
- import signal
- import os, sys, time
-
- if sys.platform[:3] in ('win', 'os2') or sys.platform=='riscos':
- raise TestSkipped, "Can't test signal on %s" % sys.platform
-
- if verbose:
- x = '-x'
- else:
- x = '+x'
- pid = os.getpid()
-
- # Shell script that will send us asynchronous signals
- script = """
- (
- set %(x)s
- sleep 2
- kill -HUP %(pid)d
- sleep 2
- kill -USR1 %(pid)d
- sleep 2
- kill -USR2 %(pid)d
- ) &
- """ % vars()
-
- def handlerA(*args):
- if verbose:
- print "handlerA", args
-
- class HandlerBCalled(Exception):
- pass
-
- def handlerB(*args):
- if verbose:
- print "handlerB", args
- raise HandlerBCalled, args
-
- signal.alarm(20) # Entire test lasts at most 20 sec.
- hup = signal.signal(signal.SIGHUP, handlerA)
- usr1 = signal.signal(signal.SIGUSR1, handlerB)
- usr2 = signal.signal(signal.SIGUSR2, signal.SIG_IGN)
- alrm = signal.signal(signal.SIGALRM, signal.default_int_handler)
-
- try:
- os.system(script)
-
- print "starting pause() loop..."
-
- try:
- while 1:
- if verbose:
- print "call pause()..."
- try:
- signal.pause()
- if verbose:
- print "pause() returned"
- except HandlerBCalled:
- if verbose:
- print "HandlerBCalled exception caught"
- else:
- pass
-
- except KeyboardInterrupt:
- if verbose:
- print "KeyboardInterrupt (assume the alarm() went off)"
-
- finally:
- signal.signal(signal.SIGHUP, hup)
- signal.signal(signal.SIGUSR1, usr1)
- signal.signal(signal.SIGUSR2, usr2)
- signal.signal(signal.SIGALRM, alrm)
-