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
https://docs.python.org/3/library/signal.html#signal.SIG_IGN
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682541(v=vs.85).aspx
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.