3 # Copyright (C) 2018 Oceanic Systems (UK) Ltd
5 # This is free software, licensed under the GNU General Public License v2.
6 # See /LICENSE for more information.
8 # Maintained by: Ryan Pannell <ryan [at] o s u k l .com> <github.com/Escalion>
10 # Write Linksys signature for factory image
11 # This is appended to the factory image and is tested by the Linksys Upgrader - as observed in civic.
12 # The footer is 256 bytes. The format is:
13 # .LINKSYS. This is detected by the Linksys upgrader before continuing with upgrade. (9 bytes)
14 # <VERSION> The version number of upgrade. Not checked so use arbitrary value (8 bytes)
15 # <TYPE> Model of target device, padded (0x20) to (15 bytes)
16 # <CRC> CRC checksum of the image to flash (8 byte)
17 # <padding> Padding ('0' + 0x20 *7) (8 bytes)
18 # <signature> Signature of signer. Not checked so use arbitrary value (16 bytes)
19 # <padding> Padding (0x00) (192 bytes)
22 # * version 1: initial commit
29 echo "Usage: $ME <type> <in filename>"
30 [ "$IMG_OUT" ] && rm -f "$IMG_OUT"
34 [ "$#" -lt 3 ] && usage
38 tmpdir
="$( mktemp -d 2> /dev/null )"
39 if [ -z "$tmpdir" ]; then
41 tmpdir
="$( mktemp -t 'ubitmp' -d )"
44 if [ -z "$tmpdir" ]; then
48 trap "rm -rf $tmpdir" EXIT
50 IMG_TMP_OUT
="${tmpdir}/out"
53 IMG_OUT
="${IMG_IN}.new"
55 [ ! -f "$IMG_IN" ] && echo "$ME: Not a valid image: $IMG_IN" && usage
57 dd if="${IMG_IN}" of
="${IMG_TMP_OUT}"
58 CRC
=$
(printf "%08X" $
(dd if="${IMG_IN}" bs
=$
(stat
-c%s
"${IMG_IN}") count
=1|
cksum| cut
-d ' ' -f1))
60 printf ".LINKSYS.01000409%-15s%-8s%-8s%-16s" "${TYPE}" "${CRC}" "0" "K0000000F0246434" >> "${IMG_TMP_OUT}"
62 dd if=/dev
/zero bs
=1 count
=192 conv
=notrunc
>> "${IMG_TMP_OUT}"
64 cp "${IMG_TMP_OUT}" "${IMG_OUT}"