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