OpenWrt – Blame information for rev 4
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4 | office | 1 | platform_check_image() { |
| 2 | local diskdev partdev diff |
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| 3 | [ "$#" -gt 1 ] && return 1 |
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| 4 | |||
| 5 | case "$(get_magic_word "$1")" in |
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| 6 | eb48|eb63) ;; |
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| 7 | *) |
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| 8 | echo "Invalid image type" |
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| 9 | return 1 |
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| 10 | ;; |
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| 11 | esac |
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| 12 | |||
| 13 | export_bootdevice && export_partdevice diskdev 0 || { |
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| 14 | echo "Unable to determine upgrade device" |
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| 15 | return 1 |
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| 16 | } |
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| 17 | |||
| 18 | get_partitions "/dev/$diskdev" bootdisk |
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| 19 | |||
| 20 | #extract the boot sector from the image |
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| 21 | get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null |
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| 22 | |||
| 23 | get_partitions /tmp/image.bs image |
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| 24 | |||
| 25 | #compare tables |
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| 26 | diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
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| 27 | |||
| 28 | rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image |
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| 29 | |||
| 30 | if [ -n "$diff" ]; then |
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| 31 | echo "Partition layout has changed. Full image will be written." |
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| 32 | ask_bool 0 "Abort" && exit 1 |
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| 33 | return 0 |
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| 34 | fi |
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| 35 | } |
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| 36 | |||
| 37 | platform_copy_config() { |
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| 38 | local partdev |
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| 39 | |||
| 40 | if export_partdevice partdev 1; then |
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| 41 | mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt |
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| 42 | cp -af "$CONF_TAR" /mnt/ |
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| 43 | umount /mnt |
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| 44 | fi |
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| 45 | } |
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| 46 | |||
| 47 | platform_do_upgrade() { |
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| 48 | local diskdev partdev diff |
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| 49 | |||
| 50 | export_bootdevice && export_partdevice diskdev 0 || { |
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| 51 | echo "Unable to determine upgrade device" |
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| 52 | return 1 |
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| 53 | } |
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| 54 | |||
| 55 | sync |
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| 56 | |||
| 57 | if [ "$SAVE_PARTITIONS" = "1" ]; then |
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| 58 | get_partitions "/dev/$diskdev" bootdisk |
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| 59 | |||
| 60 | #extract the boot sector from the image |
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| 61 | get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b |
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| 62 | |||
| 63 | get_partitions /tmp/image.bs image |
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| 64 | |||
| 65 | #compare tables |
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| 66 | diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
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| 67 | else |
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| 68 | diff=1 |
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| 69 | fi |
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| 70 | |||
| 71 | if [ -n "$diff" ]; then |
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| 72 | get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync |
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| 73 | |||
| 74 | # Separate removal and addtion is necessary; otherwise, partition 1 |
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| 75 | # will be missing if it overlaps with the old partition 2 |
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| 76 | partx -d - "/dev/$diskdev" |
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| 77 | partx -a - "/dev/$diskdev" |
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| 78 | |||
| 79 | return 0 |
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| 80 | fi |
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| 81 | |||
| 82 | #iterate over each partition from the image and write it to the boot disk |
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| 83 | while read part start size; do |
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| 84 | if export_partdevice partdev $part; then |
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| 85 | echo "Writing image to /dev/$partdev..." |
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| 86 | get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync |
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| 87 | else |
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| 88 | echo "Unable to find partition $part device, skipped." |
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| 89 | fi |
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| 90 | done < /tmp/partmap.image |
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| 91 | |||
| 92 | #copy partition uuid |
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| 93 | echo "Writing new UUID to /dev/$diskdev..." |
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| 94 | get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync |
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| 95 | } |