cardinal_pythonlib.signalfunc


Original code copyright (C) 2009-2022 Rudolf Cardinal (rudolf@pobox.com).

This file is part of cardinal_pythonlib.

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


Support functions to handle OS signals that may cause trouble.

cardinal_pythonlib.signalfunc.ctrl_break_trapper(signum: int, stackframe) None[source]

Logs that CTRL-BREAK has been pressed but does nothing else.

cardinal_pythonlib.signalfunc.ctrl_c_trapper(signum: int, stackframe) None[source]

Logs that CTRL-C has been pressed but does nothing else.

cardinal_pythonlib.signalfunc.sigterm_trapper(signum: int, stackframe) None[source]

Logs that SIGTERM has been received but does nothing else.

cardinal_pythonlib.signalfunc.trap_ctrl_c_ctrl_break() None[source]

Prevent CTRL-C, CTRL-BREAK, and similar signals from doing anything.

See

Under Windows, the only options are:

Signal

Meaning

Comment

SIGABRT

abnormal termination

SIGFPE

floating-point error

SIGILL

illegal instruction

SIGINT

CTRL+C signal

– trapped here

SIGSEGV

illegal storage access

SIGTERM

termination request

– trapped here

SIGBREAK

CTRL+BREAK

– trapped here under Windows

In Linux, you also find:

Signal

Meaning

SIGBUS

bus error / unaligned access

To ignore, can do:

signal.signal(signal.SIGINT, signal.SIG_IGN)  # SIG_IGN = "ignore me"

or pass a specified handler, as in the code here.