Stay Awake

lidawake.sh

# Keep the Mac awake with the lid closed. Requires sudo because this toggles
# the system-wide pmset SleepDisabled flag.
mac-lid-awake-on() {
  sudo pmset -a disablesleep 1
  mac-lid-awake-status
}

mac-lid-awake-off() {
  sudo pmset -a disablesleep 0
  mac-lid-awake-status
}

mac-lid-awake-status() {
  local state
  state=$(ioreg -r -c IOPMrootDomain | awk -F'= ' '/"SleepDisabled"/ {gsub(/[ "]/, "", $2); print $2; exit}')

  case "$state" in
    Yes) echo "Lid-closed sleep is disabled: this Mac should stay awake when closed." ;;
    No) echo "Lid-closed sleep is enabled: this Mac may sleep when closed." ;;
    *) echo "Could not read SleepDisabled state." ;;
  esac

  pmset -g | awk '/ sleep / || /disablesleep/ {print}'
}

alias lidawake='mac-lid-awake-on'
alias lidsleep='mac-lid-awake-off'
alias lidstatus='mac-lid-awake-status'