OpenWrt – Blame information for rev 2
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Rev | Author | Line No. | Line |
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1 | office | 1 | #!/bin/sh |
2 | # |
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3 | # Copyright (C) 2018 Oceanic Systems (UK) Ltd |
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4 | # |
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5 | # This is free software, licensed under the GNU General Public License v2. |
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6 | # See /LICENSE for more information. |
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7 | # |
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8 | # Maintained by: Ryan Pannell <ryan [at] o s u k l .com> <github.com/Escalion> |
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9 | # |
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10 | # Write Linksys signature for factory image |
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11 | # This is appended to the factory image and is tested by the Linksys Upgrader - as observed in civic. |
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12 | # The footer is 256 bytes. The format is: |
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13 | # .LINKSYS. This is detected by the Linksys upgrader before continuing with upgrade. (9 bytes) |
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14 | # <VERSION> The version number of upgrade. Not checked so use arbitary value (8 bytes) |
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15 | # <TYPE> Model of target device, padded (0x20) to (15 bytes) |
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16 | # <CRC> CRC checksum of the image to flash (8 byte) |
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17 | # <padding> Padding (0x20) (7 bytes) |
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18 | # <signature> Signature of signer. Not checked so use Arbitary value (16 bytes) |
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19 | # <padding> Padding (0x00) (192 bytes) |
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20 | # 0x0A (1 byte) |
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21 | |||
22 | ## version history |
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23 | # * version 1: initial commit |
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24 | |||
25 | set -e |
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26 | |||
27 | ME="${0##*/}" |
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28 | |||
29 | usage() { |
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30 | echo "Usage: $ME <type> <in filename>" |
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31 | [ "$IMG_OUT" ] && rm -f "$IMG_OUT" |
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32 | exit 1 |
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33 | } |
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34 | |||
35 | [ "$#" -lt 3 ] && usage |
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36 | |||
37 | TYPE=$1 |
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38 | |||
39 | tmpdir="$( mktemp -d 2> /dev/null )" |
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40 | if [ -z "$tmpdir" ]; then |
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41 | # try OSX signature |
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42 | tmpdir="$( mktemp -t 'ubitmp' -d )" |
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43 | fi |
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44 | |||
45 | if [ -z "$tmpdir" ]; then |
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46 | exit 1 |
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47 | fi |
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48 | |||
49 | trap "rm -rf $tmpdir" EXIT |
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50 | |||
51 | IMG_TMP_OUT="${tmpdir}/out" |
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52 | |||
53 | IMG_IN=$2 |
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54 | IMG_OUT="${IMG_IN}.new" |
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55 | |||
56 | [ ! -f "$IMG_IN" ] && echo "$ME: Not a valid image: $IMG_IN" && usage |
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57 | |||
58 | dd if="${IMG_IN}" of="${IMG_TMP_OUT}" |
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59 | CRC=$(printf "%08X" $(dd if="${IMG_IN}" bs=$(stat -c%s "${IMG_IN}") count=1|cksum| cut -d ' ' -f1)) |
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60 | |||
61 | printf ".LINKSYS.01000409%-15s%-8s%-7s%-16s" "${TYPE}" "${CRC}" "" "K0000000F0246434" >> "${IMG_TMP_OUT}" |
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62 | |||
63 | dd if=/dev/zero bs=1 count=192 conv=notrunc >> "${IMG_TMP_OUT}" |
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64 | |||
65 | printf '\12' >> "${IMG_TMP_OUT}" |
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66 | |||
67 | cp "${IMG_TMP_OUT}" "${IMG_OUT}" |