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get_magic_at() {
local file="$1"
local pos="$2"
get_image "$file" | dd bs=1 count=2 skip="$pos" 2>/dev/null | hexdump -v -n 2 -e '1/1 "%02x"'
}
platform_check_image_sdcard() {
local file="$1"
local magic diskdev partdev diff
magic=$(get_magic_at "$file" 510)
[ "$magic" != "55aa" ] && {
echo "Failed to verify MBR boot signature."
return 1
}
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
get_partitions "/dev/$diskdev" bootdisk
#extract the boot sector from the image
get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
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
echo "Partition layout has changed. Full image will be written."
ask_bool 0 "Abort" && exit 1
return 0
fi
}
platform_do_upgrade_sdcard() {
local board=$(board_name)
local diskdev partdev diff
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
sync
if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
get_partitions "/dev/$diskdev" bootdisk
#extract the boot sector from the image
get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
get_partitions /tmp/image.bs image
#compare tables
diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
else
diff=1
fi
if [ -n "$diff" ]; then
get_image "$@" | dd of="/dev/$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
#write uboot image
get_image "$@" | dd of="$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 $part; then
echo "Writing image to /dev/$partdev..."
get_image "$@" | dd of="/dev/$partdev" ibs="512" 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
fi
case "$board" in
cznic,turris-omnia)
fw_setenv openwrt_bootargs 'earlyprintk console=ttyS0,115200 root=/dev/mmcblk0p2 rootfstype=auto rootwait'
fw_setenv openwrt_mmcload 'setenv bootargs "$openwrt_bootargs cfg80211.freg=$regdomain"; fatload mmc 0 0x01000000 zImage; fatload mmc 0 0x02000000 armada-385-turris-omnia.dtb'
fw_setenv factory_mmcload 'setenv bootargs "$bootargs cfg80211.freg=$regdomain"; btrload mmc 0 0x01000000 boot/zImage @; btrload mmc 0 0x02000000 boot/dtb @'
fw_setenv mmcboot 'run openwrt_mmcload || run factory_mmcload; bootz 0x01000000 - 0x02000000'
;;
esac
sleep 1
}
platform_copy_config_sdcard() {
local partdev
if export_partdevice partdev 1; then
mkdir -p /boot
[ -f /boot/kernel.img ] || mount -o rw,noatime /dev/$partdev /boot
cp -af "$CONF_TAR" "/boot/$BACKUP_FILE"
sync
umount /boot
fi
}
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