1 platform_check_image
() {
2 local diskdev partdev
diff
4 export_bootdevice
&& export_partdevice diskdev
0 ||
{
5 echo "Unable to determine upgrade device"
9 get_partitions
"/dev/$diskdev" bootdisk
11 #extract the boot sector from the image
12 get_image
"$@" |
dd of
=/tmp
/image.bs count
=1 bs
=512b
2>/dev
/null
14 get_partitions
/tmp
/image.bs image
17 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
19 rm -f /tmp
/image.bs
/tmp
/partmap.bootdisk
/tmp
/partmap.image
21 if [ -n "$diff" ]; then
22 echo "Partition layout has changed. Full image will be written."
23 ask_bool
0 "Abort" && exit 1
28 platform_copy_config
() {
31 if export_partdevice partdev
3; then
32 mount
-t vfat
-o rw
,noatime
"/dev/$partdev" /mnt
33 cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
38 platform_do_upgrade
() {
39 local diskdev partdev
diff
41 export_bootdevice
&& export_partdevice diskdev
0 ||
{
42 echo "Unable to determine upgrade device"
48 if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
49 get_partitions
"/dev/$diskdev" bootdisk
51 #extract the boot sector from the image
52 get_image
"$@" |
dd of
=/tmp
/image.bs count
=1 bs
=512b
54 get_partitions
/tmp
/image.bs image
57 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
62 if [ -n "$diff" ]; then
63 get_image
"$@" |
dd of
="/dev/$diskdev" bs
=4096 conv
=fsync
65 # Separate removal and addtion is necessary; otherwise, partition 1
66 # will be missing if it overlaps with the old partition 2
67 partx
-d - "/dev/$diskdev"
68 partx
-a - "/dev/$diskdev"
73 #iterate over each partition from the image and write it to the boot disk
74 while read part start size
; do
75 if export_partdevice partdev
$part; then
76 echo "Writing image to /dev/$partdev..."
77 get_image
"$@" |
dd of
="/dev/$partdev" ibs
="512" obs
=1M skip
="$start" count
="$size" conv
=fsync
79 echo "Unable to find partition $part device, skipped."
81 done < /tmp
/partmap.image
84 echo "Writing new UUID to /dev/$diskdev..."
85 get_image
"$@" |
dd of
="/dev/$diskdev" bs
=1 skip
=440 count
=4 seek
=440 conv
=fsync