#!/bin/bash
#===========module select =======================================
busybox_install_is="no"
arm_linux_kernel_make_is="no"
#===========argv select =======================================
embeded_linux_shell_type="arm_linux_kernel" #"arm_linux_kernel" "update_kernel"
arm_linux_kernel_type="qemu" #"qemu" "device"
sys_pack_update="n" #"y" "Y" "n" "N"
kernel_config_way="oneself_kernel" #"sys_kernel"
#===========cmd================================================
sudo_pre=sudo
package_cmd=apt-get
#===========package=============================================
packages=("libncurses5-dev" "libssl-dev" "build-essential" "openssl" "bison" "bc" "flex" "libelf-dev" "git" )
arm_linux_packages=("gcc-arm-linux-gnueabi" "gcc-5-arm-linux-gnueabi" )
qemu_packages=("pkg-config" "libglib2.0-dev" "libpixman-1-dev")
#===========static info====================================
update_kernel_vesion=5.16.10
arm_linux_kernel_version=4.0
linux_kernel_download_path=.
sys_sleep=1
#======================================================================
function package_install()
{
	#package=$1
	${sudo_pre} dpkg -l |awk '{print $2}'|grep  -w ^${package}
	if [ $? -eq 0 ];then
		echo "软件包"${pName}"已经安装。"
	else
		echo "软件包"${package}"没有安装"
		#read -p "是否安装（y|n）:"  -n 1 OK #-n 1  表示只能输一下，输入到OK的变量
		OK="y" 	
#y或者Y用双竖线‘||’分割的多条命令，执行的时候遵循如下规则，如果前一条命令为真，则后面的命令不会执行，如果前一条命令为假，则继续执行后面的命令。
		if [ ${OK} = "y" ] || [ ${OK} = "Y" ];then
           echo "开始安装"${package}"……"
           ${sudo_pre} ${package_cmd} -y  install  ${package} #>> /dev/null
           if test $? -eq 0
           then
                echo "安装"${package}"完成。"
           else
                echo "安装"${package}"失败。"
           fi
		else
			echo "您选择了不安装"
		fi
	fi
}

function packages_install()
{	
	echo "packages install begin,all [ ${#packages[@]} ]"

	for ((i=0; i<${#packages[@]}; i++))
	do
		package=${packages[${i}]}
		#echo "===install [ ${package} ] package==="	
		package_install ${package}
		#sleep 1
	done
	echo "packages install over"
}
#=========================================================================
#检测网络链接畅通
function network()
{
    #超时时间
    local timeout=1
    #目标网站
    local target=www.baidu.com
	i=1
	check_timers=10
	while [ ${i} -le ${check_timers} ]
	do
		if true ; then
			#获取响应状态码
			local ret_code=`curl -I -s --connect-timeout ${timeout} ${target} -w %{http_code} | tail -n1`
			if [ "x$ret_code" = "x200" ]; then
				echo "network is ok"
				return 1 #网络畅通
			fi
		else
			pingres= ping -c 1 ${target} | sed -n '/64 bytes from/p'
			if [! -z "${pingres}" ];then
				echo "network is ok"
				return 1 #网络畅通
			fi
		fi
		echo "the ${i} check..."
		let i+=1
		sleep 1
	done

	echo "network error,plesa check"
	exit 1
	
}
#========================================================================
function file_download()
{
	file_type=0
	#download_file_name=$1
	#download_link=$2
	#download_path=$3
	while true
	do
		if [ -f ${download_file_name} ];then
			echo "${download_file_name} ok."
		else
			echo "${download_file_name} download begin..."
			sleep ${sys_sleep}
			${sudo_pre} wget -P ${download_path}/ ${download_link}
			if [ -f ${download_file_name} ];then
				echo "${download_file_name} download over..."
				sleep ${sys_sleep}
			else
				echo "${download_file_name} download failed,please check..."
				exit 0
			fi
		fi
		echo "${download_file_name}" | grep ".tar.xz"
		if [ $? -eq 0 ];then
			download_file_tar_name=${download_file_name%.tar.xz}
		else
			download_file_tar_name=${download_file_name%.tar.bz2}
		fi
	
		if [ -d ${download_path}${download_file_tar_name} ];then
			read -p $'find old package,do you need to remove\n ,if you want,input \"y\" ,else \"n\" :\n'
			if [ ${sys_pack_update} == "y" -o ${sys_pack_update} == "Y" ];then
				${sudo_pre} mv ${download_path}${download_file_tar_name} ${download_path}${download_file_tar_name}-backup
			else
				break
			fi
		fi

		echo " ${download_path}${download_file_name} tar..."
		echo "${download_file_name}" | grep ".tar.xz"
		if [ $? -eq 0 ];then
			${sudo_pre} tar -Jxf ${download_path}${download_file_name}
		else
			echo "${download_file_name}" | grep ".tar.bz2"
			if [ $? -eq 0 ];then
				${sudo_pre} tar -jxvf ${download_path}${download_file_name}
			fi
		fi
		if [ ! $? -eq 0 ];then
			echo "tar failed"
			if [ -d ${download_path}${download_file_tar_name} ];then
				${sudo_pre} rm -r ${download_path}${download_file_tar_name} 
			fi
			${sudo_pre} rm  ${download_path}${download_file_name}
		else
			echo "tar ok"
			sleep ${sys_sleep}
			break
		fi
	done

}
#==============================================================================================
function device_select()
{
	while true
	do
		if [ ${mode} == "1" ];then
			read -p $'please input arm_linux_kernel_type name:\n \"update_kernel\" or \"arm_linux_kernel\"\n' embeded_linux_shell_type
		fi
		if [ ${embeded_linux_shell_type} == "update_kernel" ] || [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
			if [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
				while true
				do
					if [ mode == 1 ];then
						read -p $'please input embeded_linux_shell_type name:\n \"device\" or \"qemu\"\n' arm_linux_kernel_type
					fi
					if [ ${arm_linux_kernel_type} == "device" -o  ${arm_linux_kernel_type} == "qemu" ];then
						packages+=(${arm_linux_packages[@]})
						#echo ${packages}
						linux_kernel_version=${arm_linux_kernel_version}
						#echo ${linux_kernel_version}
						break
					else
						echo "please input the correct arm_linux_kernel_type name..."
					fi
				done
			else
				linux_kernel_version=${update_kernel_vesion}
			fi
		    break
		else
		    echo "please input the correct embeded_linux_shell_type name..."
		fi
	done
	echo "[${embeded_linux_shell_type}] ${arm_linux_kernel_type} will begin..."
}

#==============================================================================================
echo "emebed linux package install"
echo "designed by junzhu,2022.2.18"
sleep ${sys_sleep}
mode="0"
device_select mode
echo "network check..."
sleep ${sys_sleep}
network
#====================================================================
echo "step1 prepare..."
echo "package update..."
read -p $'do you need to update package \n ,if you want,input \"y\": \n' sys_pack_update
if [ ${sys_pack_update} == "y" -o ${sys_pack_update} == "Y" ];then
	${sudo_pre} ${package_cmd} update
fi
echo "prepare ok,packages will install" 
#====================================================================
echo "step2 packages install..."
sleep ${sys_sleep}
packages_install packages
#******************************************************************
if [ ${embeded_linux_shell_type} == "update_kernel" ];then
	echo "kernel dependent..."
	${sudo_pre} ${package_cmd} build-dep linux-image-generic
fi
sleep ${sys_sleep}
#====================================================================
echo "step3 prepare linux kernel..."
#**************************************************************************
echo "(1) linux kernel download..."
sleep ${sys_sleep}

download_file_name="linux-${linux_kernel_version}.tar.xz"
download_link="https://cdn.kernel.org/pub/linux/kernel/v${linux_kernel_version:0:1}.x/linux-${linux_kernel_version}.tar.xz"
download_path="${linux_kernel_download_path}/"


file_download ${download_file_name} ${download_link} ${download_path}
#**************************************************************************
if [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
	echo "(2) linux compiler replacement..."
	#while true
	#do
		sleep ${sys_sleep}
		arm-linux-gnueabi-gcc -v #| grep "5.5.0"
		#if [ ! $? -eq 0 ];then
			${sudo_pre} update-alternatives --install /usr/bin/arm-linux-gnueabi-gcc arm-linux-gnueabi-gcc /usr/bin/arm-linux-gnueabi-gcc-5 5
			${sudo_pre} update-alternatives --install /usr/bin/arm-linux-gnueabi-gcc arm-linux-gnueabi-gcc /usr/bin/arm-linux-gnueabi-gcc-7 7
			${sudo_pre} update-alternatives --config arm-linux-gnueabi-gcc
		#else
		#	break
		#fi
	#done
	echo "linux compiler replacement ok, 5.5.0..."
	#**************************************************************************
	echo "(3) busybox download & make..."
	sleep ${sys_sleep}

	download_file_name="busybox-1.28.0.tar.bz2"
	download_link="https://busybox.net/downloads/busybox-1.28.0.tar.bz2"
	download_path="${linux_kernel_download_path}/"
	file_download ${download_file_name} ${download_link} ${download_path}
	echo "if you open kernel configuration success,please select \"build static binary\" of \"build option\",then select \"Exit\" and \"Save\""
	sleep ${sys_sleep}
	cd ${download_path}busybox-1.28.0
	
	if [ ${busybox_install_is} == "" ] ;then
		export ARCH=arm
		export CROSS_COMPILE=arm-linux-gnueabi-
		make menuconfig
		make install
	fi
	echo "busbox make install success"

	cp -r ./_install ../linux-4.0/
	cd ../linux-4.0/_install
	${sudo_pre} mkdir ./etc
	${sudo_pre} mkdir ./dev
	${sudo_pre} mkdir ./mnt
	${sudo_pre} mkdir -p etc/init.d/
	${sudo_pre} touch ./etc/init.d/rcS
	write_to_content="mkdir -p /proc\nmkdir -p /tmp\nmkdir -p /sys\nmkdir -p /mnt\n/bin/mount -a\nmkdir -p /dev/pts\nmount -t devpts devpts /dev/pts\necho /sbin/mdev > /proc/sys/kernel/hotplug\nmdev -s\n"
	echo -e ${write_to_content} > ./etc/init.d/rcS
	${sudo_pre} chmod +x ./etc/init.d/rcS

	${sudo_pre} touch ./etc/fstab ./etc/inittab
	write_to_content="proc /proc proc defaults 0 0\ntmpfs /tmp tmpfs defaults 0 0\nsysfs /sys sysfs defaults 0 0\ntmpfs /dev tmpfs defaults 0 0\ndebugfs /sys/kernel/debug debugfs defaults 0 0\n"
	echo -e ${write_to_content} > ./etc/fstab

	write_to_content="::sysinit:/etc/init.d/rcS\n::respawn:-/bin/sh\n::askfirst:-/bin/sh\n::ctrlaltdel:/bin/umount -a -r\n"
	echo -e ${write_to_content} > ./etc/inittab
	cd ./dev/
	${sudo_pre} mknod console c 5 1
	${sudo_pre} mknod null c 1 3
	cd ../../../
	#**************************************************************************
	if [ ${arm_linux_kernel_type} == "qemu" ];then
	echo "(4) qemu download & install..."
		if false ; then
			sleep ${sys_sleep}
			download_file_name="qemu-4.1.0.tar.xz"
			download_link="https://download.qemu.org/qemu-4.1.0.tar.xz"
			download_path="${linux_kernel_download_path}/"
			file_download ${download_file_name} ${download_link} ${download_path}
			echo "qemu config & make..."
			if false ;then
				cd ${download_path}${download_file_name%.tar.xz}
				./configure
				make
				cd ..
			fi
			echo "qemu make success"
		else
			${sudo_pre} ${package_cmd} install qemu-system-arm 
		fi
		echo "qemu ok"
	fi
fi
#====================================================================
echo "step4 linux kernel configuration..."

cd ${linux_kernel_download_path}/linux-${linux_kernel_version}

if [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
	export ARCH=arm
	export CROSS_COMPILE=arm-linux-gnueabi-
	make vexpress_defconfig
	sleep ${sys_sleep}
else
	if [ ${kernel_config_way} == "sys_kernel" ];then 
		echo "use kylin's kernel configuration..."
		echo "backup first..."
		${sudo_pre} mv ${linux_kernel_download_path}/.config ${linux_kernel_download_path}/.config-backup
		kernel_name=`uname -r`
		kernel_config_file=/boot/config-${kernel_name}
		echo "the linux kernel_config_file is [${kernel_config_file}]"
		if [ ! -f  ${kernel_config_file} ];then 
			${sudo_pre} cp ${kernel_config_file} ${linux_kernel_download_path}/.config
		fi
		echo "[${kernel_config_file}] use ok"
	fi	
fi

echo "if you open kernel configuration success,please select \"Exit\" and \"Save\""
while true
do
	make_menuconfig= make menuconfig 
	if [  !  $? -eq 0  ];then
		${make_menuconfig} # | grep "Your display is too small to run Menuconfig!"
		if [  !  $? -eq 0  ];then
			if false ; then
				display_size_current=`${sudo_pre} xrandr | sed -n '3p' | awk '{print $1}' | sed 's/x/ /g'`
				display_size_max=`${sudo_pre} xrandr | sed -n '4p'| awk '{print $1}' | sed 's/x/ /g'`
				echo "resize display size [${display_size_current}] to [${display_size_max}]..."
				${sudo_pre} cvt ${display_size_max}
				source /etc/profile
			else
				echo "please check ,and try again"
				exit 0		
 			fi
		fi
	else
		if false ; then
			echo "recovery display size ..."
			echo "resize display size [${display_size_max}] to [${display_size_current}]..."
			${sudo_pre} cvt ${display_size_current}
			source /etc/profile
		fi
		echo "linux kernel configuration ok ..."
		break
	fi
	sleep ${sys_sleep}
done
sleep ${sys_sleep}
#====================================================================
echo "step5 moudle make..."
cpu_num=`cat /proc/stat | grep cpu[0-9] -c`
if [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
	if [ ${arm_linux_kernel_make_is} == "yes" ] ;then
		make bzImage -j${cpu_num} ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
		make dtbs
	fi
else
	echo "make -j${cpu_num}"
	#make -j${cpu_num}
	#sudo make modules_install
	#sudo make install
fi
echo "make success ..."
#====================================================================
if [ ${embeded_linux_shell_type} == "arm_linux_kernel" ];then
	echo "step6 Run QEMU to simulate the 4-core cortex-a9 versatile express development platform ..."
	qemu-system-arm -M vexpress-a9 -smp 4 -m 200M -kernel arch/arm/boot/zImage -append "rdinit=/linuxrc console=ttyAMA0 loglevel=8" -dtb arch/arm/boot/dts/vexpress-v2p-ca9.dtb -nographic
fi
exit 0