Adriana Kobylak | e8606da | 2020-07-15 09:16:56 -0500 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | |
| 3 | mmc_init() { |
| 4 | base_dir="/media/hostfw" |
| 5 | running_dir="${base_dir}/running" |
| 6 | prsv_dir="${base_dir}/prsv" |
| 7 | |
| 8 | if [ ! -d "${running_dir}" ]; then |
| 9 | mkdir -p ${running_dir} |
| 10 | fi |
| 11 | if [ ! -d "${prsv_dir}" ]; then |
| 12 | mkdir -p "${prsv_dir}" |
| 13 | fi |
| 14 | |
| 15 | # Determine if the running dir contains the running version |
| 16 | boot_label="$(fw_printenv -n bootside)" |
| 17 | running_label="" |
| 18 | running_label_file="${running_dir}/partlabel" |
| 19 | if [ -f "${running_label_file}" ]; then |
| 20 | running_label=$(cat ${running_label_file}) |
| 21 | fi |
| 22 | if [ "${running_label}" != "${boot_label}" ]; then |
| 23 | # Copy off the preserved partitions |
| 24 | # A line in the pnor.toc looks like this: |
| 25 | # partition05=SECBOOT,0x00381000,0x003a5000,00,ECC,PRESERVED |
| 26 | rm -f ${prsv_dir}/* |
| 27 | if [ -f ${running_dir}/pnor.toc ]; then |
| 28 | prsvs=$(grep PRESERVED ${running_dir}/pnor.toc) |
| 29 | for prsv in ${prsvs}; do |
| 30 | prsv=${prsv##partition*=} |
| 31 | prsv=$(echo ${prsv} | cut -d "," -f 1) |
| 32 | cp -p ${running_dir}/${prsv} ${prsv_dir} |
| 33 | done |
| 34 | fi |
| 35 | |
| 36 | # Copy contents of running image to running dir |
| 37 | tmp_dir="/tmp/hostfw" |
| 38 | mkdir -p "${tmp_dir}" |
| 39 | mount ${base_dir}/hostfw-${boot_label} ${tmp_dir} -o ro |
| 40 | rm -f ${running_dir}/* |
| 41 | cp -p ${tmp_dir}/* ${running_dir}/ |
| 42 | umount ${tmp_dir} |
| 43 | rm -rf ${tmp_dir} |
| 44 | |
| 45 | # Restore the preserved partitions |
| 46 | cp -p ${prsv_dir}/* ${running_dir}/ || true |
| 47 | rm -f ${prsv_dir}/* |
| 48 | |
| 49 | # Save the label |
| 50 | echo "${boot_label}" > "${running_label_file}" |
| 51 | |
| 52 | # Remove patches |
| 53 | rm -f ${base_dir}/patch/* |
| 54 | fi |
| 55 | |
| 56 | # Mount alternate dir |
| 57 | if [ "${boot_label}" = "a" ]; then |
| 58 | alternate_label="b" |
| 59 | else |
| 60 | alternate_label="a" |
| 61 | fi |
| 62 | alternate_dir="${base_dir}/alternate" |
| 63 | if [ ! -d "${alternate_dir}" ]; then |
| 64 | mkdir -p ${alternate_dir} |
| 65 | fi |
| 66 | mount ${base_dir}/hostfw-${alternate_label} ${alternate_dir} -o ro |
| 67 | } |
| 68 | |
| 69 | mmc_patch() { |
| 70 | # Patching is disabled if field mode is set |
| 71 | if [[ "$(fw_printenv fieldmode 2>/dev/null)" == "fieldmode=true" ]]; then |
| 72 | return 0 |
| 73 | fi |
| 74 | |
| 75 | target="/media/hostfw/patch" |
| 76 | if [ ! -d "${target}" ]; then |
| 77 | mkdir -p "${target}" |
| 78 | fi |
| 79 | |
| 80 | patchdir="/usr/local/share" |
| 81 | if [ ! -d "${patchdir}" ]; then |
| 82 | mkdir -p "${patchdir}" |
| 83 | fi |
| 84 | |
| 85 | ln -s "${target}" "${patchdir}/hostfw" |
| 86 | ln -s "${target}" "${patchdir}/pnor" |
| 87 | } |
| 88 | |
| 89 | case "$1" in |
| 90 | mmc-init) |
| 91 | mmc_init |
| 92 | ;; |
| 93 | mmc-patch) |
| 94 | mmc_patch |
| 95 | ;; |
| 96 | *) |
| 97 | echo "Invalid argument" |
| 98 | exit 1 |
| 99 | ;; |
| 100 | esac |