Exception API¶

exception DaemonikerException¶

All of the custom exceptions in Daemoniker subclass this exception. As such, an application can catch any Daemoniker exception via:

try:
    code_goes_here()

except DaemonikerException:
    handle_error_here()

exception SignalError¶: These errors are only raised if something goes wrong internally while handling signals.

exception ReceivedSignal¶

Subclasses of ReceivedSignal exceptions are raised by the default signal handlers. A ReceivedSignal will only be raise directly:

if the actual signal number passed to the callback does not match its expected value.
if, on Windows, the signal handling daughter process terminates abnormally.

Note

Calling int() on a ReceivedSignal class or instance, or a class or instance of any of its subclasses, will return the signal number associated with the signal.

exception SIGINT¶

Raised for incoming SIGINT signals. May also be used to send() signals to other processes.

Attr SIGNUM:	The signal number associated with the signal.

exception SIGTERM¶

Raised for incoming SIGTERM signals. May also be used to send() signals to other processes.

Attr SIGNUM:	The signal number associated with the signal.

exception SIGABRT¶

Raised for incoming SIGABRT signals. May also be used to send() signals to other processes.

Attr SIGNUM:	The signal number associated with the signal.

Exception hierarchy¶

The Daemoniker exceptions have the following inheritance:

DaemonikerException
    SignalError
    ReceivedSignal
        SIGINT
        SIGTERM
        SIGABRT