Automatic screen session setup/reattach at login.

autoscreen_with_procsetup.bashrc

if [ ! -z "$PS1" ] && [ -z "$STY" ] && which screen 2>&1 > /dev/null
then
  old=$IFS
  IFS=$'\n'
  screens=($(screen -ls | egrep -iv '\(.*dead.*\)' | grep -e '(.*)' | awk '{print $1}'))
  IFS=$old
  if [ ${#screens[@]} -ge 1 ]; then
    # pre-existing session, reattach to the first, leaving no bash parent behind.
    exec screen -x "${screens[0]}"
  else
    # No existing session.
    # run a particular background script in a window, then move it to window 99.
    screen -q -d -S mon -m /home/tw/xinits/startx_xcmo
    screen -p 0 -X number 99
    # start up a shell session so we have something to go to.
    screen -X screen $SHELL
    # reattach to the new shell session (window 0), leaving no bash parent behind.
    exec screen -p 0 -x
  fi
else
  : # echo "Normal shell?"
fi

variant on autoscreen.bashrc written for use on my htpc.