platform_check_image() { true } platform_copy_config() { local partdev if export_partdevice partdev -1; then mount -t vfat -o rw,noatime "/dev/$partdev" /mnt cp -af "$CONF_TAR" /mnt/ umount /mnt fi } platform_do_upgrade() { local diskdev partdev ibs diff if export_bootdevice && export_partdevice diskdev -2; then sync if [ "$SAVE_PARTITIONS" = "1" ]; then get_partitions "/dev/$diskdev" bootdisk #get block size if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")" else ibs=512 fi #extract the boot sector from the image get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b get_partitions /tmp/image.bs image #compare tables diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" if [ -n "$diff" ]; then echo "Partition layout is changed. Full image will be written." ask_bool 0 "Abort" && exit get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync return 0 fi #write uboot image get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 conv=notrunc #iterate over each partition from the image and write it to the boot disk while read part start size; do part="$(($part - 2))" if export_partdevice partdev $part; then echo "Writing image to /dev/$partdev..." get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync else echo "Unable to find partition $part device, skipped." fi done < /tmp/partmap.image #copy partition uuid echo "Writing new UUID to /dev/$diskdev..." get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync else get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync fi sleep 1 fi }