Python - Trap all signals

Question

In python 2.6 under Linux, I can use the following to handle a TERM signal:

import signal def handleSigTERM():     shutdown() signal.signal(signal.SIGTERM, handleSigTERM)     

Is there any way to setup a handler for all signals received by the process, other than just setting them up one-at-a-time?

Answer 1

You could just loop through the signals in the signal module and set them up.

for i in [x for x in dir(signal) if x.startswith("SIG")]:   try:     signum = getattr(signal,i)     signal.signal(signum,sighandler)   except (OSError, RuntimeError) as m: #OSError for Python3, RuntimeError for 2     print ("Skipping {}".format(i)) 

Answer 2

As of Python 3.5, the signal constants are defined as an enum, enabling a nicer approach:

import signal  catchable_sigs = set(signal.Signals) - {signal.SIGKILL, signal.SIGSTOP} for sig in catchable_sigs:     signal.signal(sig, print)  # Substitute handler of choice for `print`