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1a384ac0b5
The new build commands operate on the input image and use it again as output image. This conflicts with the way combined-ext-image.sh was operating. It required that input and output files are different files and and that it can write freely to the output file. This can be avoided when all intermediate build steps by combined-ext-image.sh are done in a temporary directory. The output file is then only overwritten in the last step. Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
79 lines
2.2 KiB
Bash
Executable File
79 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (C) 2011 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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# Write image header followed by all specified files
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# The header is padded to 64k, format is:
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# CE magic word ("Combined Extended Image") (2 bytes)
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# <CE_VERSION> file format version field (2 bytes)
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# <TYPE> short description of the target device (32 bytes)
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# <NUM FILES> number of files following the header (2 byte)
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# <file1_name> name of the first file (32 bytes)
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# <file1_length> length of the first file encoded as zero padded 8 digit hex (8 bytes)
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# <file1_md5> md5 checksum of the first file (32 bytes)
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# <fileN_name> name of the Nth file (32 bytes)
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# <fileN_length> length of the Nth file encoded as zero padded 8 digit hex (8 bytes)
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# <fileN_md5> md5 checksum of the Nth file (32 bytes)
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## version history
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# * version 1: initial file format with num files / name / length / md5 checksum
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set -e
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ME="${0##*/}"
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usage() {
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echo "Usage: $ME <type> <ext filename> <file1> <filename1> [<file2> <filename2> <fileN> <filenameN>]"
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[ "$IMG_OUT" ] && rm -f "$IMG_OUT"
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exit 1
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}
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[ "$#" -lt 4 ] && usage
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CE_VERSION=1
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IMG_TYPE=$1; shift
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IMG_OUT=$1; shift
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FILE_NUM=$(($# / 2))
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FILES=""
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tmpdir="$( mktemp -d 2> /dev/null )"
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if [ -z "$tmpdir" ]; then
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# try OSX signature
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tmpdir="$( mktemp -t 'ubitmp' -d )"
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fi
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if [ -z "$tmpdir" ]; then
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exit 1
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fi
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trap "rm -rf $tmpdir" EXIT
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IMG_TMP_OUT="${tmpdir}/out"
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printf "CE%02x%-32s%02x" $CE_VERSION "$IMG_TYPE" $FILE_NUM > "${IMG_TMP_OUT}"
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while [ "$#" -gt 1 ]
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do
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file=$1
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filename=$2
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[ ! -f "$file" ] && echo "$ME: Not a valid file: $file" && usage
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FILES="$FILES $file"
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md5=$(mkhash md5 "$file")
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printf "%-32s%08x%32s" "$filename" $(stat -c "%s" "$file") "${md5%% *}" >> "${IMG_TMP_OUT}"
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shift 2
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done
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[ "$#" -eq 1 ] && echo "$ME: Filename not specified: $1" && usage
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mv "${IMG_TMP_OUT}" "${IMG_TMP_OUT}".tmp
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dd if="${IMG_TMP_OUT}.tmp" of="${IMG_TMP_OUT}" bs=65536 conv=sync 2>/dev/null
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rm "${IMG_TMP_OUT}".tmp
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cat $FILES >> "${IMG_TMP_OUT}"
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cp "${IMG_TMP_OUT}" "${IMG_OUT}"
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