[Ubuntu][Shell]make_ubuntu_sd.sh注释解读

华为云博客字数受到限制，完整注释请参看https://blog.csdn.net/FL1623863129/article/details/103984869

# ########################Begin Executing######################################

# ************************Check args*******************************************

function main()

{

    # 检查输入的参数合不合法，4个就是对的不是4个就是错的

    if [[ $# -lt 4 ]];then

        echo "Failed: Number of parameter illegal! Usage: $0 <dev fullname> <img path> <iso fullname> <mini filename>"

        return 1;

    fi

    # 检查网卡IP和USB IP地址是不是有效的

    # ***************check network and usb card ip**********************************

    checkIps

    if [ $? -ne 0 ];then

        return 1

    fi

    # 检查SD卡

    # ************************umount dev_name***************************************

    checkSDCard

    if [ $? -ne 0 ];then

        return 1

    fi

    # ************************Extract ubuntufs**************************************

    # output:squashfs-root/

    #提取Ubunutu镜像里面的系统

    ubuntufsExtract

    if [ $? -ne 0 ];then

        return 1

    fi

    # end

    # 将/usr/bin/qemu-aarch64-static复制到/usr/bin/qemu-aarch64-static目录

    # ************************Check architecture************************************

    arch=$(uname -m)

    if [[ ${arch} =~ "x86" ]];then

         cp /usr/bin/qemu-aarch64-static ${LogPath}squashfs-root/usr/bin/

         if [ $? -ne 0 ];then

             echo "Failed: qemu-user-static or binfmt-support not found!"

             return 1;

         fi

         chmod 755 ${LogPath}squashfs-root/usr/bin/qemu-aarch64-static

    fi

    # end

    # 配置Ubuntu系统

    # ************************Configure ubuntu**************************************

    echo "Process: 1/4(Configure ubuntu filesystem)"

    configUbuntu

    if [ $? -ne 0 ];then

        return 1

    fi

    # end

    #格式化SD卡

    # ************************Format SDcard*****************************************

    echo "Process: 2/4(Format SDcard)"

    formatSDcard

    if [ $? -ne 0 ];then

        return 1

    fi

    # end

    # ************************Copy files to SD**************************************

    # 卸载TMPDIR_SD_MOUNT分区并删除里面的所有文件

    if [[ -d "${TMPDIR_SD_MOUNT}" ]];then

        umount ${TMPDIR_SD_MOUNT} 2>/dev/null

        rm -rf ${TMPDIR_SD_MOUNT}

    fi

    #创建TMPDIR_SD_MOUNT目录并挂载

    mkdir ${TMPDIR_SD_MOUNT}

    mount ${DEV_NAME}$p1 ${TMPDIR_SD_MOUNT} 2>/dev/null  # updated by aman

    # 卸载分区2，并删除分区2里面所有的文件

    if [[ -d "${TMPDIR_SD2_MOUNT}" ]];then

        umount ${TMPDIR_SD2_MOUNT} 2>/dev/null

        rm -rf ${TMPDIR_SD2_MOUNT}

    fi

    #创建TMPDIR_SD_MOUNT2目录并挂载

    mkdir ${TMPDIR_SD2_MOUNT}

    mount ${DEV_NAME}$p2 ${TMPDIR_SD2_MOUNT} 2>/dev/null  # updated by aman

    # 卸载分区3，并删除分区3里面所有的文件

    if [[ -d "${TMPDIR_SD3_MOUNT}" ]];then

        umount ${TMPDIR_SD3_MOUNT} 2>/dev/null

        rm -rf ${TMPDIR_SD3_MOUNT}

    fi

    #创建TMPDIR_SD_MOUNT3目录并挂载

    mkdir ${TMPDIR_SD3_MOUNT}

    mount ${DEV_NAME}$p3 ${TMPDIR_SD3_MOUNT} 2>/dev/null  # updated by aman

    echo "Process: 3/4(Copy filesystem and mini package to SDcard)"

    # 复制文件到SD卡里面去，具体怎么复制请看这个函数

    copyFilesToSDcard

    if [ $? -ne 0 ];then

        return 1

    fi

    # end

    echo "Process: 4/4(Make sysroot)"

    make_sysroot

    umount ${TMPDIR_SD_MOUNT} 2>/dev/null

    if [[ $? -ne 0 ]];then

        echo "Failed: Umount ${TMPDIR_SD_MOUNT} to SDcard failed!"

        return 1

    fi

    umount ${TMPDIR_SD2_MOUNT} 2>/dev/null

    if [[ $? -ne 0 ]];then

        echo "Failed: Umount ${TMPDIR_SD2_MOUNT} to SDcard failed!"

        return 1

    fi

    umount ${TMPDIR_SD3_MOUNT} 2>/dev/null

    if [[ $? -ne 0 ]];then

        echo "Failed: Umount ${TMPDIR_SD3_MOUNT} to SDcard failed!"

        return 1

    fi

    echo "Finished!"

    return 0

}

#进入脚本我们应该从这里看代码，上面全部是封装的函数，用来调用的

main $* #执行main函数

ret=$? #获取执行的结果

#clean files

filesClean #清理缓存的文件

#失败就向make_ubuntu_sd.result写个字符串Failed

if [[ ret -ne 0 ]];then

    echo "Failed" > ${LogPath}/make_ubuntu_sd.result

    exit 1

fi

#成功就向make_ubuntu_sd.sh写个字符串Success

echo "Success" > ${LogPath}/make_ubuntu_sd.result

exit 0

# end