c21f1a7e5feba553110f138c14977daaa472da70
1 platform_export_bootpart
() {
2 local cmdline uuid disk
4 if read cmdline
< /proc
/cmdline
; then
7 disk
="${cmdline##*block2mtd=}"
11 disk
="${cmdline##*root=}"
17 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)
18 uuid
="${disk#PARTUUID=}"
20 for disk
in /dev
/[hsv
]d
[a-z
] /dev
/xvd
[a-z
]; do
21 set -- $
(dd if=$disk bs
=1 skip
=440 count
=4 2>/dev
/null |
hexdump -v -e '4/1 "%02x "')
22 if [ "$4$3$2$1" = "$uuid" ]; then
23 export BOOTPART
="${disk}1"
29 export BOOTPART
="${disk%[0-9]}1"
38 platform_check_image
() {
39 [ "$#" -gt 1 ] && return 1
41 case "$(get_magic_word "$1")" in
44 echo "Invalid image type"
50 platform_copy_config
() {
51 if [ -b "$BOOTPART" ]; then
52 mount
-t ext4
-o rw
,noatime
"$BOOTPART" /mnt
53 cp -af "$CONF_TAR" /mnt
/
58 get_partitions
() { # <device> <filename>
62 if [ -b "$disk" -o -f "$disk" ]; then
63 echo "Reading partition table from $filename..."
64 partx
-r "$disk" -gbo NR
,START
,SECTORS
> "/tmp/partx.$filename"
68 platform_do_upgrade
() {
69 platform_export_bootpart
70 disk
="${BOOTPART%[0-9]}"
72 if [ -b "$disk" ]; then
74 if [ "$SAVE_PARTITIONS" = "1" ]; then
75 get_partitions
"$disk" bootdisk
79 sectors
="$(partx -r $disk -gbo SECTORS --nr 1:1)"
80 size
="$(partx -r $disk -gbo SIZE --nr 1:1)"
81 ibs
="$(($size / $sectors))"
83 #extract the boot sector from the image
84 get_image
"$@" |
dd of
=/tmp
/image.bs count
=1 bs
=512b
86 get_partitions
/tmp
/image.bs image
89 diff="$(grep -F -x -v -f /tmp/partx.bootdisk /tmp/partx.image)"
90 if [ -n "$diff" ]; then
91 echo "Partition layout is changed. Full image will be written."
92 ask_bool
0 "Abort" && exit
94 get_image
"$@" |
dd of
="$disk" bs
=4096 conv
=fsync
98 #iterate over each partition from the image and write it to the boot disk
99 while read part start size
; do
100 echo "Writing image to $disk$part..."
101 get_image
"$@" |
dd of
="$disk$part" ibs
="$ibs" obs
=1M skip
="$start" count
="$size" conv
=fsync
102 done < /tmp
/partx.image
105 echo "Writing new UUID to $disk$part..."
106 get_image
"$@" |
dd of
="$disk" bs
=1 skip
=440 count
=4 seek
=440 conv
=fsync
108 get_image
"$@" |
dd of
="$disk" bs
=4096 conv
=fsync