title: linux: suspend process at startup
body: <p>I would like to spawn a process suspended, possibly in the context of another user (e.g. via sudo -u ...), set up some iptables rules for the spawned process, continue running the process, and remove the iptable rules when the process exists.</p>
  
  <p>Is there any standart means (bash, corutils, etc.) that allows me to achieve the above? In particular, how can I spawn a process in a suspended state and get its pid?</p>