kernel: remove stray 4.4 references
[openwrt/openwrt.git] / scripts / combined-ext-image.sh
1 #!/bin/sh
2 #
3 # Copyright (C) 2011 OpenWrt.org
4 #
5 # This is free software, licensed under the GNU General Public License v2.
6 # See /LICENSE for more information.
7 #
8
9 # Write image header followed by all specified files
10 # The header is padded to 64k, format is:
11 # CE magic word ("Combined Extended Image") (2 bytes)
12 # <CE_VERSION> file format version field (2 bytes)
13 # <TYPE> short description of the target device (32 bytes)
14 # <NUM FILES> number of files following the header (2 byte)
15 # <file1_name> name of the first file (32 bytes)
16 # <file1_length> length of the first file encoded as zero padded 8 digit hex (8 bytes)
17 # <file1_md5> md5 checksum of the first file (32 bytes)
18 # <fileN_name> name of the Nth file (32 bytes)
19 # <fileN_length> length of the Nth file encoded as zero padded 8 digit hex (8 bytes)
20 # <fileN_md5> md5 checksum of the Nth file (32 bytes)
21
22 ## version history
23 # * version 1: initial file format with num files / name / length / md5 checksum
24
25 set -e
26
27 ME="${0##*/}"
28
29 usage() {
30 echo "Usage: $ME <type> <ext filename> <file1> <filename1> [<file2> <filename2> <fileN> <filenameN>]"
31 [ "$IMG_OUT" ] && rm -f "$IMG_OUT"
32 exit 1
33 }
34
35 [ "$#" -lt 4 ] && usage
36
37 CE_VERSION=1
38 IMG_TYPE=$1; shift
39 IMG_OUT=$1; shift
40 FILE_NUM=$(($# / 2))
41 FILES=""
42
43 tmpdir="$( mktemp -d 2> /dev/null )"
44 if [ -z "$tmpdir" ]; then
45 # try OSX signature
46 tmpdir="$( mktemp -t 'ubitmp' -d )"
47 fi
48
49 if [ -z "$tmpdir" ]; then
50 exit 1
51 fi
52
53 trap "rm -rf $tmpdir" EXIT
54
55 IMG_TMP_OUT="${tmpdir}/out"
56
57 printf "CE%02x%-32s%02x" $CE_VERSION "$IMG_TYPE" $FILE_NUM > "${IMG_TMP_OUT}"
58
59 while [ "$#" -gt 1 ]
60 do
61 file=$1
62 filename=$2
63
64 [ ! -f "$file" ] && echo "$ME: Not a valid file: $file" && usage
65 FILES="$FILES $file"
66 md5=$(mkhash md5 "$file")
67 printf "%-32s%08x%32s" "$filename" $(stat -c "%s" "$file") "${md5%% *}" >> "${IMG_TMP_OUT}"
68 shift 2
69 done
70
71 [ "$#" -eq 1 ] && echo "$ME: Filename not specified: $1" && usage
72
73 mv "${IMG_TMP_OUT}" "${IMG_TMP_OUT}".tmp
74 dd if="${IMG_TMP_OUT}.tmp" of="${IMG_TMP_OUT}" bs=65536 conv=sync 2>/dev/null
75 rm "${IMG_TMP_OUT}".tmp
76
77 cat $FILES >> "${IMG_TMP_OUT}"
78 cp "${IMG_TMP_OUT}" "${IMG_OUT}"