#*********************************************************************************#*                      post-image.sh hacking#* 说明：#*     分析i.MX6 post-images.sh合成SD card工作原理。#*#*                                              2018-1-23 深圳 宝安西乡 曾剑锋#********************************************************************************/# 一、参考文档：#    1. Linux mktemp命令#        http://www.runoob.com/linux/linux-comm-mktemp.html#    2. Genimage - The Image Creation Tool#        https://github.com/pengutronix/genimage#!/usr/bin/env bash## dtb_list extracts the list of DTB files from BR2_LINUX_KERNEL_INTREE_DTS_NAME# in ${BR_CONFIG}, then prints the corresponding list of file names for the# genimage configuration file#dtb_list(){    local DTB_LIST="$(sed -n 's/^BR2_LINUX_KERNEL_INTREE_DTS_NAME="\([a-z0-9 \-]*\)"$/\1/p' ${BR2_CONFIG})"    for dt in $DTB_LIST; do        echo -n "\"$dt.dtb\", "    done}## linux_image extracts the Linux image format from BR2_LINUX_KERNEL_UIMAGE in# ${BR_CONFIG}, then prints the corresponding file name for the genimage# configuration file#linux_image(){    if grep -Eq "^BR2_LINUX_KERNEL_UIMAGE=y$" ${BR2_CONFIG}; then        echo "\"uImage\""    else        echo "\"zImage\""    fi}main(){    # 获取dtb和linux image    local FILES="$(dtb_list) $(linux_image)"    # 创建配置文件文件    local GENIMAGE_CFG="$(mktemp --suffix genimage.cfg)"    local GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"    # 替换掉cfg模板文件中的FILES字段    sed -e "s/%FILES%/${FILES}/" \        board/freescale/common/imx/genimage.cfg.template > ${GENIMAGE_CFG}    # 可能存在上次的暂存目录，删除    rm -rf "${GENIMAGE_TMP}"    #    # outputpath: default: images Mandatory path where all images are written to (must exist).    # inputpath:  default: input This mandatory path is searched for input images, for example bootloader binaries, kernel images (must exist).    # rootpath:   default: root Mandatory path to the root filesystem (must exist).    # tmppath:    default: tmp Optional path to a temporary directory. There must be enough space available here to hold a copy of the root filesystem.    # config:     default: genimage.cfg Path to the genimage config file.    #    # ${TARGET_DIR} = /home/zengjf/zengjf/Buildroot/buildroot/output/target    # ${GENIMAGE_TMP} = /home/zengjf/zengjf/Buildroot/buildroot/output/build/genimage.tmp    # ${BINARIES_DIR} = /home/zengjf/zengjf/Buildroot/buildroot/output/images    # ${BINARIES_DIR} = /home/zengjf/zengjf/Buildroot/buildroot/output/images    # ${GENIMAGE_CFG} = /tmp/tmp.1Kks4kDC5mgenimage.cfg    #    genimage \        --rootpath "${TARGET_DIR}" \        --tmppath "${GENIMAGE_TMP}" \        --inputpath "${BINARIES_DIR}" \        --outputpath "${BINARIES_DIR}" \        --config "${GENIMAGE_CFG}"    // 删除配置文件    rm -f ${GENIMAGE_CFG}    exit $?}main $@