OpenWrt – Blame information for rev 3
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Rev | Author | Line No. | Line |
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1 | office | 1 | . /lib/functions.sh |
2 | |||
3 | REQUIRE_IMAGE_METADATA=1 |
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4 | |||
5 | # copied from x86's platform.sh |
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6 | |||
7 | platform_check_image() { |
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8 | local diskdev partdev diff |
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9 | |||
10 | [ "$#" -gt 1 ] && return 1 |
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11 | |||
12 | export_bootdevice && export_partdevice diskdev -2 || { |
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13 | echo "Unable to determine upgrade device" |
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14 | return 1 |
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15 | } |
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16 | |||
17 | get_partitions "/dev/$diskdev" bootdisk |
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18 | |||
19 | #extract the boot sector from the image |
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20 | get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null |
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21 | |||
22 | get_partitions /tmp/image.bs image |
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23 | |||
24 | #compare tables |
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25 | diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
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26 | |||
27 | rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image |
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28 | |||
29 | if [ -n "$diff" ]; then |
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30 | echo "Partition layout has changed. Full image will be written." |
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31 | ask_bool 0 "Abort" && exit 1 |
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32 | return 0 |
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33 | fi |
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34 | |||
35 | return 0; |
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36 | } |
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37 | |||
38 | platform_do_upgrade() { |
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39 | local diskdev partdev diff |
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40 | |||
41 | export_bootdevice && export_partdevice diskdev -2 || { |
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42 | echo "Unable to determine upgrade device" |
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43 | return 1 |
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44 | } |
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45 | |||
46 | sync |
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47 | |||
48 | if [ "$SAVE_PARTITIONS" = "1" ]; then |
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49 | get_partitions "/dev/$diskdev" bootdisk |
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50 | |||
51 | #extract the boot sector from the image |
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52 | get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b |
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53 | |||
54 | get_partitions /tmp/image.bs image |
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55 | |||
56 | #compare tables |
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57 | diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)" |
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58 | else |
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59 | diff=1 |
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60 | fi |
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61 | |||
62 | if [ -n "$diff" ]; then |
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63 | get_image "$@" | dd of="/dev/$diskdev" bs=2M conv=fsync |
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64 | |||
65 | # Separate removal and addtion is necessary; otherwise, partition 1 |
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66 | # will be missing if it overlaps with the old partition 2 |
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67 | partx -d - "/dev/$diskdev" |
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68 | partx -a - "/dev/$diskdev" |
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69 | |||
70 | return 0 |
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71 | fi |
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72 | |||
73 | #iterate over each partition from the image and write it to the boot disk |
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74 | while read part start size; do |
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75 | # root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem |
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76 | # one of which is this offset, I'm not sure what's the best fix, so |
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77 | # here's a WA. |
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78 | let part=$((part - 2)) |
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79 | if export_partdevice partdev $part; then |
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80 | echo "Writing image to /dev/$partdev..." |
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81 | get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync |
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82 | else |
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83 | echo "Unable to find partition $part device, skipped." |
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84 | fi |
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85 | done < /tmp/partmap.image |
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86 | |||
87 | #copy partition uuid |
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88 | echo "Writing new UUID to /dev/$diskdev..." |
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89 | get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync |
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90 | } |
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91 | |||
92 | platform_copy_config() { |
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93 | local partdev |
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94 | |||
95 | # Same as above /dev/sd[a|b]2 is root, so /boot is -1 |
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96 | if export_partdevice partdev -1; then |
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97 | mkdir -p /boot |
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98 | [ -f /boot/kernel.img ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot |
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99 | cp -af "$CONF_TAR" /boot/ |
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3 | office | 100 | tar --directory / -xvf "$CONF_TAR" boot/config.txt |
1 | office | 101 | sync |
102 | unmount /boot |
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103 | fi |
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104 | } |