| Guido van Rossum | 5c97167 | 1996-07-22 15:23:25 +0000 | [diff] [blame] | 1 | # Test the signal module |
| 2 | |
| 3 | import signal |
| 4 | import os |
| 5 | |
| 6 | |
| 7 | pid = os.getpid() |
| 8 | |
| 9 | # Shell script that will send us asynchronous signals |
| 10 | script = """ |
| 11 | ( |
| 12 | set -x |
| 13 | sleep 2 |
| 14 | kill -5 %(pid)d |
| 15 | sleep 2 |
| 16 | kill -2 %(pid)d |
| 17 | sleep 2 |
| 18 | kill -3 %(pid)d |
| 19 | ) & |
| 20 | """ % vars() |
| 21 | |
| 22 | def handlerA(*args): |
| 23 | print "handlerA", args |
| 24 | |
| 25 | HandlerBCalled = "HandlerBCalled" # Exception |
| 26 | |
| 27 | def handlerB(*args): |
| 28 | print "handlerB", args |
| 29 | raise HandlerBCalled, args |
| 30 | |
| 31 | signal.alarm(20) # Entire test lasts at most 20 sec. |
| 32 | signal.signal(5, handlerA) |
| 33 | signal.signal(2, handlerB) |
| 34 | signal.signal(3, signal.SIG_IGN) |
| 35 | signal.signal(signal.SIGALRM, signal.default_int_handler) |
| 36 | |
| 37 | os.system(script) |
| 38 | |
| 39 | print "starting pause() loop..." |
| 40 | |
| 41 | try: |
| 42 | while 1: |
| 43 | print "call pause()..." |
| 44 | try: |
| 45 | signal.pause() |
| 46 | print "pause() returned" |
| 47 | except HandlerBCalled: |
| 48 | print "HandlerBCalled exception caught" |
| 49 | except KeyboardInterrupt: |
| 50 | print "KeyboardInterrupt (assume the alarm() went off)" |