mirror of https://github.com/home-assistant/core
72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
"""Signal handling related helpers."""
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import logging
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import signal
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import sys
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from types import FrameType
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from homeassistant.const import RESTART_EXIT_CODE
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.loader import bind_hass
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_LOGGER = logging.getLogger(__name__)
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@callback
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@bind_hass
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def async_register_signal_handling(hass: HomeAssistant) -> None:
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"""Register system signal handler for core."""
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if sys.platform != "win32":
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@callback
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def async_signal_handle(exit_code: int) -> None:
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"""Wrap signal handling.
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* queue call to shutdown task
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* re-instate default handler
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"""
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hass.loop.remove_signal_handler(signal.SIGTERM)
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hass.loop.remove_signal_handler(signal.SIGINT)
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hass.async_create_task(hass.async_stop(exit_code))
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try:
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hass.loop.add_signal_handler(signal.SIGTERM, async_signal_handle, 0)
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except ValueError:
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_LOGGER.warning("Could not bind to SIGTERM")
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try:
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hass.loop.add_signal_handler(signal.SIGINT, async_signal_handle, 0)
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except ValueError:
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_LOGGER.warning("Could not bind to SIGINT")
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try:
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hass.loop.add_signal_handler(
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signal.SIGHUP, async_signal_handle, RESTART_EXIT_CODE
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)
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except ValueError:
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_LOGGER.warning("Could not bind to SIGHUP")
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else:
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old_sigterm = None
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old_sigint = None
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@callback
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def async_signal_handle(exit_code: int, frame: FrameType) -> None:
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"""Wrap signal handling.
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* queue call to shutdown task
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* re-instate default handler
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"""
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signal.signal(signal.SIGTERM, old_sigterm)
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signal.signal(signal.SIGINT, old_sigint)
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hass.async_create_task(hass.async_stop(exit_code))
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try:
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old_sigterm = signal.signal(signal.SIGTERM, async_signal_handle)
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except ValueError:
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_LOGGER.warning("Could not bind to SIGTERM")
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try:
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old_sigint = signal.signal(signal.SIGINT, async_signal_handle)
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except ValueError:
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_LOGGER.warning("Could not bind to SIGINT")
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