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@ -1,64 +1,3 @@ |
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platform_export_partdevice() { |
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local var="$1" offset="$2" |
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local uevent MAJOR MINOR DEVNAME DEVTYPE |
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for uevent in /sys/class/block/*/uevent; do |
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. "$uevent" |
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if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then |
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export "$var=$DEVNAME" |
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return 0 |
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fi |
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done |
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return 1 |
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} |
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platform_export_bootdevice() { |
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local cmdline uuid disk uevent |
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local MAJOR MINOR DEVNAME DEVTYPE |
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if read cmdline < /proc/cmdline; then |
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case "$cmdline" in |
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*block2mtd=*) |
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disk="${cmdline##*block2mtd=}" |
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disk="${disk%%,*}" |
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;; |
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*root=*) |
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disk="${cmdline##*root=}" |
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disk="${disk%% *}" |
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;; |
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esac |
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case "$disk" in |
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PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02) |
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uuid="${disk#PARTUUID=}" |
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uuid="${uuid%-02}" |
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for disk in $(find /dev -type b); do |
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set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "') |
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if [ "$4$3$2$1" = "$uuid" ]; then |
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uevent="/sys/class/block/${disk##*/}/uevent" |
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break |
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fi |
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done |
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;; |
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/dev/*) |
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uevent="/sys/class/block/${disk##*/}/uevent" |
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;; |
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esac |
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if [ -e "$uevent" ]; then |
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. "$uevent" |
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export BOOTDEV_MAJOR=$MAJOR |
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export BOOTDEV_MINOR=$MINOR |
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return 0 |
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fi |
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fi |
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return 1 |
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} |
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platform_check_image() { |
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[ "$#" -gt 1 ] && return 1 |
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@ -74,47 +13,17 @@ platform_check_image() { |
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platform_copy_config() { |
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local partdev |
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if platform_export_partdevice partdev 1; then |
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if export_partdevice partdev 1; then |
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mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt |
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cp -af "$CONF_TAR" /mnt/ |
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umount /mnt |
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fi |
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} |
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get_partitions() { # <device> <filename> |
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local disk="$1" |
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local filename="$2" |
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if [ -b "$disk" -o -f "$disk" ]; then |
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echo "Reading partition table from $filename..." |
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local magic="$(hexdump -v -n 2 -s 0x1FE -e '1/2 "0x%04X"' "$disk")" |
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if [ "$magic" != 0xAA55 ]; then |
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echo "Invalid partition table on $disk" |
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exit |
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fi |
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rm -f "/tmp/partmap.$filename" |
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local part |
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for part in 1 2 3 4; do |
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set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk") |
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local type="$(($1 % 256))" |
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local lba="$(($2))" |
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local num="$(($3))" |
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[ $type -gt 0 ] || continue |
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printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename" |
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done |
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fi |
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} |
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platform_do_upgrade() { |
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local diskdev partdev ibs diff |
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if platform_export_bootdevice && platform_export_partdevice diskdev 0; then |
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if export_bootdevice && export_partdevice diskdev 0; then |
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sync |
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if [ "$SAVE_PARTITIONS" = "1" ]; then |
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get_partitions "/dev/$diskdev" bootdisk |
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@ -143,7 +52,7 @@ platform_do_upgrade() { |
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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 platform_export_partdevice partdev $part; then |
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if export_partdevice partdev $part; then |
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echo "Writing image to /dev/$partdev..." |
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get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync |
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else |
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