Update power.sh

  if [ -s "$QEMU_PID" ]; then

    pid=$(<"$QEMU_PID")

    if isAlive "$pid"; then

      echo && error "Forcefully terminating QEMU, reason: $reason..."

    { kill -15 "$pid" || true; } 2>/dev/null

      { kill -9 "$pid" || true; } 2>/dev/null

    fi

  fi

    finish "$code" && return "$code"

  fi

  # Send ACPI shutdown signal

  echo 'system_powerdown' | nc -q 1 -w 1 localhost "$MON_PORT" > /dev/null

  local cnt=0 abort=0 factor=2 offset=1

  local cnt=0

  local kill_lead=10

  local kill_at=0

  local kill_sent=0

  [ "$QEMU_TIMEOUT" -ge 10 ] && factor=5

  [ "$QEMU_TIMEOUT" -gt 25 ] && factor=10

  if [ "$QEMU_TIMEOUT" -lt 30 ]; then

    kill_lead=$((QEMU_TIMEOUT / 2))

    [ "$kill_lead" -lt 1 ] && kill_lead=1

  if [ "$QEMU_TIMEOUT" -lt $((factor + offset + 1)) ]; then

    QEMU_TIMEOUT=$((factor + offset + 1))

  fi

  kill_at=$((QEMU_TIMEOUT - kill_lead))

  [ "$kill_at" -lt 1 ] && kill_at=1

  while [ "$cnt" -lt "$QEMU_TIMEOUT" ]; do

  abort=$(( QEMU_TIMEOUT - factor - offset ))

    sleep 1

    (( cnt++ ))

  while [ "$cnt" -lt $(( QEMU_TIMEOUT - offset )) ]; do

    ! isAlive "$pid" && break

    # Workaround for zombie pid

    [ ! -s "$QEMU_PID" ] && break

    if [ "$cnt" -ne "$abort" ]; then

      if [ "$cnt" -gt 0 ]; then

        info "Waiting for VM to shutdown... ($cnt/$QEMU_TIMEOUT)"

    if [ "$kill_sent" -eq 0 ] && [ "$cnt" -ge "$kill_at" ]; then

      fi

    else

      info "QEMU is still running, sending SIGTERM... ($cnt/$QEMU_TIMEOUT)"

      { kill -15 "$pid" || true; } 2>/dev/null

      kill_sent=1

    fi

    # Send ACPI shutdown signal

    echo 'system_powerdown' | nc -q 1 -w 1 localhost "$MON_PORT" > /dev/null

  done

    sleep 1

    (( cnt++ ))

  if [ "$cnt" -ge "$QEMU_TIMEOUT" ] && isAlive "$pid"; then

    error "Shutdown timeout reached, forcefully killing process..."

    { kill -9 "$pid" || true; } 2>/dev/null

  fi

  done

  finish "$code" && return "$code"

}