code: def main():
      # Read from stdout forever. Because stdout is a file descriptor
      # inherited from our parent process, we will get an EOF if the parent
      # dies, which is signaled by an empty return from read().
      # We intentionally don't set any signal handlers here, so a SIGTERM from
      # the parent can be used to kill this process gracefully without it killing
      # the rest of the process group.
      while len(sys.stdin.read()) != 0:
          pass
      reap_process_group()
  
imports: import atexit
  import os
  import signal
  import sys
  import time
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types