Useful to see what signals your terminal emulator sends to its child "shell" process. It's poorly written and that's ok :).

trap.py

import signal
import os
import psutil

def sighandler(signum, frame):
    with open('/tmp/trapped', 'a') as f:
        pid = os.getpid()
        parent = psutil.Process(pid).parent
        f.write('PID {3} captured signal {0}, parent {1} ({2}).\n'.format(signum,parent.name, parent.pid,pid))

for i in [x for x in dir(signal) if x.startswith("SIG")]:
  try:
    signum = getattr(signal,i)
    signal.signal(signum,sighandler)
  except RuntimeError:
    pass
  except ValueError:
    pass

while True:
    pass