get all signals being listen by process - credit to https://unix.stackexchange.com/a/85365/48479

signals_for_process.py

import subprocess

ALL_SIGNALS = {}
for sig in range(64):
  sig += 1
  sig_cmd = "kill -l " + str(sig) + " 2>/dev/null"
  ALL_SIGNALS[sig] = subprocess.Popen(sig_cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True).communicate()[0].strip()

def getSignals(pid, sigCat):
  signal_cmd = "grep \"^" + sigCat + ":\" \"/proc/" + str(pid) + "/status\" | cut -c 9-"
  hex_string = subprocess.Popen(signal_cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True).communicate()[0].strip()
  bin_string = bin(int(hex_string, 16))[2:].zfill(8)
  bin_string = bin_string[::-1]
  signals = []
  sigposition = 1
  for sigchar in bin_string:
      if sigchar == "1":
          if sigposition in ALL_SIGNALS:
              signal = {}
              signal['sig'] = sigposition
              signal['name'] = ALL_SIGNALS[sigposition]
              signals_li.append(signal)
      sigposition += 1
  return signals_li

pid = 123
signalsCaught = getSignals(pid, "SigBlk")
signalsIgnore = getSignals(pid, "SigIgn")
signalsBlock = getSignals(pid, "SigCgt")