shell按键停止脚本S99autoReboot.sh

#! /bin/sh
if  read -t 2 -p "please enter any key to stop reboot:" key 
then
    echo "stop exec reboot!"
else
    echo "no input, reboot now!"
    if [ ! -e "/etc/init.d/reboot_cnt" ];then
        touch /etc/init.d/reboot_cnt
        echo 1 > /etc/init.d/reboot_cnt
    else
        count=`cat /etc/init.d/reboot_cnt`
        let count++
        echo $count > /etc/init.d/reboot_cnt
        /data/MIPITest &
        sleep 10s
        echo 1 > /proc/rp_gpio/gpioa1
        sleep 10s
        sync 
        reboot -f
    fi
fi