| legacy_sdcard_check_image() { |
| local file="$1" |
| local diskdev partdev diff |
| |
| export_bootdevice && export_partdevice diskdev 0 || { |
| v "Unable to determine upgrade device" |
| return 1 |
| } |
| |
| get_partitions "/dev/$diskdev" bootdisk |
| |
| v "Extract boot sector from the image" |
| get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b |
| |
| get_partitions /tmp/image.bs image |
| |
| #compare tables |
| diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
| |
| rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image |
| |
| if [ -n "$diff" ]; then |
| v "Partition layout has changed. Full image will be written." |
| ask_bool 0 "Abort" && exit 1 |
| return 0 |
| fi |
| } |
| |
| legacy_sdcard_do_upgrade() { |
| local board=$(board_name) |
| local diskdev partdev diff |
| |
| export_bootdevice && export_partdevice diskdev 0 || { |
| v "Unable to determine upgrade device" |
| return 1 |
| } |
| |
| sync |
| |
| if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then |
| get_partitions "/dev/$diskdev" bootdisk |
| |
| v "Extract boot sector from the image" |
| get_image_dd "$1" of=/tmp/image.bs count=1 bs=512b |
| |
| get_partitions /tmp/image.bs image |
| |
| #compare tables |
| diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
| else |
| diff=1 |
| fi |
| |
| if [ -n "$diff" ]; then |
| get_image_dd "$1" of="/dev/$diskdev" bs=4096 conv=fsync |
| |
| # Separate removal and addtion is necessary; otherwise, partition 1 |
| # will be missing if it overlaps with the old partition 2 |
| partx -d - "/dev/$diskdev" |
| partx -a - "/dev/$diskdev" |
| else |
| v "Writing bootloader to /dev/$diskdev" |
| get_image_dd "$1" of="$diskdev" bs=512 skip=1 seek=1 count=2048 conv=fsync |
| #iterate over each partition from the image and write it to the boot disk |
| while read part start size; do |
| if export_partdevice partdev $part; then |
| v "Writing image to /dev/$partdev..." |
| get_image_dd "$1" of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync |
| else |
| v "Unable to find partition $part device, skipped." |
| fi |
| done < /tmp/partmap.image |
| |
| v "Writing new UUID to /dev/$diskdev..." |
| get_image_dd "$1" of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync |
| fi |
| |
| sleep 1 |
| } |
| |
| legacy_sdcard_copy_config() { |
| local partdev |
| |
| if export_partdevice partdev 1; then |
| mkdir -p /boot |
| [ -f /boot/kernel.img ] || mount -o rw,noatime /dev/$partdev /boot |
| cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE" |
| sync |
| umount /boot |
| fi |
| } |