root / scripts / signrom.sh @ 4c3b5a48
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1 | 89e671e3 | Alexander Graf | #!/bin/sh |
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2 | 89e671e3 | Alexander Graf | |
3 | 89e671e3 | Alexander Graf | # Option ROM Signing utility |
4 | 89e671e3 | Alexander Graf | # |
5 | 89e671e3 | Alexander Graf | # This program is free software; you can redistribute it and/or modify |
6 | 89e671e3 | Alexander Graf | # it under the terms of the GNU General Public License as published by |
7 | 89e671e3 | Alexander Graf | # the Free Software Foundation; either version 2 of the License, or |
8 | 89e671e3 | Alexander Graf | # (at your option) any later version. |
9 | 89e671e3 | Alexander Graf | # |
10 | 89e671e3 | Alexander Graf | # This program is distributed in the hope that it will be useful, |
11 | 89e671e3 | Alexander Graf | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | 89e671e3 | Alexander Graf | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | 89e671e3 | Alexander Graf | # GNU General Public License for more details. |
14 | 89e671e3 | Alexander Graf | # |
15 | 89e671e3 | Alexander Graf | # You should have received a copy of the GNU General Public License |
16 | 8167ee88 | Blue Swirl | # along with this program; if not, see <http://www.gnu.org/licenses/>. |
17 | 89e671e3 | Alexander Graf | # |
18 | 89e671e3 | Alexander Graf | # Copyright Novell Inc, 2009 |
19 | 89e671e3 | Alexander Graf | # Authors: Alexander Graf <agraf@suse.de> |
20 | 89e671e3 | Alexander Graf | # |
21 | 89e671e3 | Alexander Graf | # Syntax: signrom.sh <input> <output> |
22 | 89e671e3 | Alexander Graf | |
23 | 89e671e3 | Alexander Graf | # did we get proper arguments? |
24 | 89e671e3 | Alexander Graf | test "$1" -a "$2" || exit 1 |
25 | 89e671e3 | Alexander Graf | |
26 | 89e671e3 | Alexander Graf | sum=0 |
27 | 89e671e3 | Alexander Graf | |
28 | 89e671e3 | Alexander Graf | # find out the file size |
29 | 89e671e3 | Alexander Graf | x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null | od -t u1 -A n` |
30 | 89e671e3 | Alexander Graf | #size=`expr $x \* 512 - 1` |
31 | 89e671e3 | Alexander Graf | size=$(( $x * 512 - 1 )) |
32 | 89e671e3 | Alexander Graf | |
33 | 89e671e3 | Alexander Graf | # now get the checksum |
34 | 33bbd1de | Avi Kivity | nums=`od -A n -t u1 -v -N $size "$1"` |
35 | 99772ae2 | Christoph Egger | for i in ${nums}; do |
36 | 89e671e3 | Alexander Graf | # add each byte's value to sum |
37 | 33bbd1de | Avi Kivity | sum=`expr \( $sum + $i \) % 256` |
38 | 89e671e3 | Alexander Graf | done |
39 | 89e671e3 | Alexander Graf | |
40 | 33bbd1de | Avi Kivity | sum=$(( (256 - $sum) % 256 )) |
41 | c66b57fc | Alexander Graf | sum_octal=$( printf "%o" $sum ) |
42 | 89e671e3 | Alexander Graf | |
43 | 89e671e3 | Alexander Graf | # and write the output file |
44 | 89e671e3 | Alexander Graf | cp "$1" "$2" |
45 | c66b57fc | Alexander Graf | printf "\\$sum_octal" | dd of="$2" bs=1 count=1 seek=$size conv=notrunc 2>/dev/null |