screen

screen is a virtual terminal manager and a lot more besides. One of my (un)usual tricks is to use it as a ZTerm replacement:

screen /dev/tty.Bluetooth-Modem 38400

• tmux, my replacement of choice.
• Stupid screen tricks
• Freshmeat page
• Documentation
• dtach, a simpler program to handle long-running processes.
• detachtty, another alternative that works in line-at-a-time mode.

if [[ `screen -list | grep Detached | wc -l` == 0 ]]; then
  if [ ! ${SSH_TTY} ]; then
    exec screen
  else
    screen
  fi
else
  if [ ! ${SSH_TTY} ]; then
    exec screen -dRR
  else
    screen -dRR
  fi
fi
clear

(via)