1#!/bin/sh 2 3mmc_init() { 4 base_dir="/media/hostfw" 5 ro_dir="${base_dir}/running-ro" 6 running_dir="${base_dir}/running" 7 prsv_dir="${base_dir}/prsv" 8 staging_dir="${base_dir}/staging" 9 10 if [ ! -d "${ro_dir}" ]; then 11 mkdir -p "${ro_dir}" 12 fi 13 if [ ! -d "${running_dir}" ]; then 14 mkdir -p ${running_dir} 15 fi 16 if [ ! -d "${prsv_dir}" ]; then 17 mkdir -p "${prsv_dir}" 18 fi 19 if [ ! -d "${staging_dir}" ]; then 20 mkdir -p "${staging_dir}" 21 fi 22 23 # Mount the image that corresponds to the boot label as read-only to be used 24 # to populate the running directory. 25 boot_label="$(fw_printenv -n bootside)" 26 if ! grep -q "${ro_dir}" /proc/mounts; then 27 mount ${base_dir}/hostfw-"${boot_label}" ${ro_dir} -o ro 28 fi 29 30 # Determine if the running dir contains the running version 31 running_label="" 32 running_label_file="${running_dir}/partlabel" 33 if [ -f "${running_label_file}" ]; then 34 running_label=$(cat ${running_label_file}) 35 fi 36 if [ "${running_label}" != "${boot_label}" ]; then 37 # Copy off the preserved partitions 38 # A line in the pnor.toc (81e00994.lid) looks like this: 39 # partition05=SECBOOT,0x00381000,0x003a5000,00,ECC,PRESERVED 40 rm -f ${prsv_dir}/* 41 if [ -f "${ro_dir}/81e00994.lid" ]; then 42 prsvs=$(grep PRESERVED "${ro_dir}/81e00994.lid") 43 for prsv in ${prsvs}; do 44 prsv=${prsv##partition*=} 45 prsv=$(echo "${prsv}" | cut -d "," -f 1) 46 if [ -L "${running_dir}/${prsv}" ]; then 47 # Preserve the symlink target file 48 prsv="$(readlink "${running_dir}/${prsv}")" 49 cp -p ${running_dir}/"${prsv}" ${prsv_dir} 50 fi 51 done 52 fi 53 54 # Copy lid contents of running image to running dir 55 rm -f ${running_dir}/* 56 cp -p ${ro_dir}/*.lid ${running_dir}/ 57 58 # Restore the preserved partitions. Ignore error, there may be none. 59 cp -p ${prsv_dir}/* ${running_dir}/ 2>/dev/null || true 60 rm -f "${prsv_dir:?}/"* 61 62 # Clean up the staging dir in case of a failed update 63 rm -rf "${staging_dir:?}/"* 64 65 # Save the label 66 echo "${boot_label}" > "${running_label_file}" 67 68 fi 69 70 # Mount alternate dir 71 if [ "${boot_label}" = "a" ]; then 72 alternate_label="b" 73 else 74 alternate_label="a" 75 fi 76 alternate_dir="${base_dir}/alternate" 77 if [ ! -d "${alternate_dir}" ]; then 78 mkdir -p ${alternate_dir} 79 fi 80 if ! grep -q "${alternate_dir}" /proc/mounts; then 81 mount ${base_dir}/hostfw-${alternate_label} ${alternate_dir} -o ro 82 fi 83} 84 85mmc_patch() { 86 # Patching is disabled if field mode is set 87 if [ "$(fw_printenv fieldmode 2>/dev/null)" = "fieldmode=true" ]; then 88 return 0 89 fi 90 91 boot_label="$(fw_printenv -n bootside)" 92 if [ "${boot_label}" = "a" ]; then 93 alternate_label="b" 94 else 95 alternate_label="a" 96 fi 97 98 # Create patch directories 99 patch_dir="/media/hostfw/patch-" 100 running_patch_dir="${patch_dir}${boot_label}" 101 if [ ! -d "${running_patch_dir}" ]; then 102 mkdir -p "${running_patch_dir}" 103 fi 104 alternate_patch_dir="${patch_dir}${alternate_label}" 105 if [ ! -d "${alternate_patch_dir}" ]; then 106 mkdir -p "${alternate_patch_dir}" 107 fi 108 109 # Create patch symlinks 110 symlink_base="/usr/local/share" 111 if [ ! -d "${symlink_base}" ]; then 112 mkdir -p "${symlink_base}" 113 fi 114 hostfw_symlink_base="${symlink_base}/hostfw" 115 if [ ! -d "${hostfw_symlink_base}" ]; then 116 mkdir -p "${hostfw_symlink_base}" 117 fi 118 119 if [ "$(readlink -f "${symlink_base}/pnor")" != "${running_patch_dir}" ]; then 120 ln -s "${running_patch_dir}" "${symlink_base}/pnor" 121 fi 122 if [ "$(readlink -f "${hostfw_symlink_base}/running")" != "${running_patch_dir}" ]; then 123 ln -s "${running_patch_dir}" "${hostfw_symlink_base}/running" 124 fi 125 if [ "$(readlink -f "${hostfw_symlink_base}/alternate")" != "${alternate_patch_dir}" ]; then 126 ln -s "${alternate_patch_dir}" "${hostfw_symlink_base}/alternate" 127 fi 128} 129 130case "$1" in 131 mmc-init) 132 mmc_init 133 ;; 134 mmc-patch) 135 mmc_patch 136 ;; 137 *) 138 echo "Invalid argument" 139 exit 1 140 ;; 141esac 142