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| 1 | import atexit | |
| 2 | - | import atexit |
| 2 | + | import os |
| 3 | - | import os |
| 3 | + | import signal |
| 4 | - | import signal |
| 4 | + | import subprocess |
| 5 | - | import subprocess |
| 5 | + | import sys |
| 6 | - | import sys |
| 6 | + | import threading |
| 7 | - | import threading |
| 7 | + | import time |
| 8 | - | import time |
| 8 | + | |
| 9 | ||
| 10 | class SignalException(Exception): | |
| 11 | - | class SignalException(Exception): |
| 11 | + | ... |
| 12 | - | ... |
| 12 | + | |
| 13 | ||
| 14 | pid = os.getpid() | |
| 15 | - | pid = os.getpid() |
| 15 | + | print("PID is", pid)
|
| 16 | - | print("PID is", pid) |
| 16 | + | |
| 17 | ||
| 18 | def raiser(signal, *rest): | |
| 19 | - | def raiser(signal, *rest): |
| 19 | + | raise SignalException(f"Got signal {signal}", signal)
|
| 20 | - | raise SignalException(f"Got signal {signal}", signal) |
| 20 | + | |
| 21 | ||
| 22 | def kill(pid, sig, delay): | |
| 23 | - | def kill(pid, sig, delay): |
| 23 | + | time.sleep(delay) |
| 24 | - | time.sleep(delay) |
| 24 | + | os.kill(pid, sig) |
| 25 | - | os.kill(pid, sig) |
| 25 | + | |
| 26 | ||
| 27 | if len(sys.argv) == 2: | |
| 28 | - | if len(sys.argv) == 2: |
| 28 | + | try: |
| 29 | - | try: |
| 29 | + | signal_value = int(sys.argv[1]) |
| 30 | - | signal_value = int(sys.argv[1]) |
| 30 | + | except ValueError: |
| 31 | - | except ValueError: |
| 31 | + | try: |
| 32 | - | try: |
| 32 | + | sig = sys.argv[1].upper() |
| 33 | - | sig = sys.argv[1].upper() |
| 33 | + | signal_value = signal.Signals[sig] |
| 34 | - | signal_value = signal.Signals[sig] |
| 34 | + | except KeyError: |
| 35 | - | except KeyError: |
| 35 | + | raise SystemExit("A valid signal number or signal name is required")
|
| 36 | - | raise SystemExit("A valid signal number or signal name is required") |
| 36 | + | |
| 37 | try: | |
| 38 | - | try: |
| 38 | + | signal_type = signal.Signals(signal_value) |
| 39 | - | signal_type = signal.Signals(signal_value) |
| 39 | + | except ValueError: |
| 40 | - | except ValueError: |
| 40 | + | raise SystemExit("Signal is unkown")
|
| 41 | - | raise SystemExit("Signal is unkown") |
| 41 | + | else: |
| 42 | - | else: |
| 42 | + | signal_value = None |
| 43 | - | signal_value = None |
| 43 | + | signal_type = None |
| 44 | - | signal_type = None |
| 44 | + | |
| 45 | ||
| 46 | class Button: | |
| 47 | - | class Button: |
| 47 | + | buttons = [] |
| 48 | - | buttons = [] |
| 48 | + | |
| 49 | def __init__(self, pin): | |
| 50 | - | def __init__(self, pin): |
| 50 | + | self.pin = pin |
| 51 | - | self.pin = pin |
| 51 | + | self.buttons.append(self) |
| 52 | - | self.buttons.append(self) |
| 52 | + | |
| 53 | @classmethod | |
| 54 | - | @classmethod |
| 54 | + | def close_all(cls): |
| 55 | - | def close_all(cls): |
| 55 | + | for button in cls.buttons: |
| 56 | - | for button in cls.buttons: |
| 56 | + | print("Closing button", button.pin)
|
| 57 | - | print("Closing button", button.pin) |
| 57 | + | button.close() |
| 58 | - | button.close() |
| 58 | + | |
| 59 | def close(self): | |
| 60 | - | def close(self): |
| 60 | + | ... |
| 61 | - | ... |
| 61 | + | |
| 62 | ||
| 63 | atexit.register(Button.close_all) | |
| 64 | - | atexit.register(Button.close_all) |
| 64 | + | [Button(x) for x in range(10)] |
| 65 | - | [Button(x) for x in range(10)] |
| 65 | + | |
| 66 | if signal_type: | |
| 67 | - | if signal_type: |
| 67 | + | # must be set in MainThread |
| 68 | - | # must be set in MainThread |
| 68 | + | try: |
| 69 | - | try: |
| 69 | + | signal.signal(signal_type, raiser) |
| 70 | - | signal.signal(signal_type, raiser) |
| 70 | + | except OSError: |
| 71 | - | except OSError: |
| 71 | + | raise SystemExit("Invalid Signal")
|
| 72 | - | raise SystemExit("Invalid Signal") |
| 72 | + | |
| 73 | ||
| 74 | # Run a worker thread to signal myself. | |
| 75 | - | # Run a worker thread to signal myself. |
| 75 | + | threading.Thread(target=kill, args=(pid, signal_type, 2), daemon=True).start() |
| 76 | - | threading.Thread(target=kill, args=(pid, signal_type, 2), daemon=True).start() |
| 76 | + | |
| 77 | try: | |
| 78 | - | try: |
| 78 | + | time.sleep(3600) |
| 79 | - | time.sleep(3600) |
| 79 | + | except KeyboardInterrupt: |
| 80 | - | except KeyboardInterrupt: |
| 80 | + | print("Got CTRL+C")
|
| 81 | - | print("Got CTRL+C") |
| 81 | + | except SignalException as sig: |
| 82 | - | except SignalException as sig: |
| 82 | + | print(sig.args[0]) |
| 83 | - | print(sig.args[0]) |
| 83 | + | sys.exit(sig.args[1]) |
| 84 | - | sys.exit(sig.args[1]) |
| 84 | + |
