class twisted.internet.interfaces._ISupportsExitSignalCapturing(Interface): (source)
An implementor of _ISupportsExitSignalCapturing will capture the value of any delivered exit signal (SIGINT, SIGTERM, SIGBREAK) for which it has installed a handler. The caught signal number is made available in the _exitSignal attribute.
| Attribute | _exitSignal | int or None, the integer exit signal delivered to the application, or None if no signal was delivered. |
int or None, the integer exit signal delivered to the application, or None if no signal was delivered.