7519b35881
Allow passing in an optional offset (PARTOFFSET) for the first partition. If not specified this will default to 256K (512 blocks) as it has before. For example if you want to start partition data at a 16M offset instead of 256K, specify 'PARTOFFSET=16M'. Signed-off-by: Tim Harvey <tharvey@gateworks.com>
59 lines
1.9 KiB
Bash
Executable File
59 lines
1.9 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (C) 2006-2012 OpenWrt.org
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set -e -x
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if [ $# -ne 5 ] && [ $# -ne 6 ]; then
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echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
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exit 1
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fi
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OUTPUT="$1"
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KERNELSIZE="$2"
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KERNELDIR="$3"
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ROOTFSSIZE="$4"
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ROOTFSIMAGE="$5"
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ALIGN="$6"
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rm -f "$OUTPUT"
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head=16
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sect=63
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# create partition table
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set $(ptgen -o "$OUTPUT" -h $head -s $sect ${GUID:+-g} -p "${KERNELSIZE}m${PARTOFFSET:+@$PARTOFFSET}" -p "${ROOTFSSIZE}m" ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE} ${GUID:+-G $GUID})
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KERNELOFFSET="$(($1 / 512))"
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KERNELSIZE="$2"
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ROOTFSOFFSET="$(($3 / 512))"
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ROOTFSSIZE="$(($4 / 512))"
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# Using mcopy -s ... is using READDIR(3) to iterate through the directory
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# entries, hence they end up in the FAT filesystem in traversal order which
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# breaks reproducibility.
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# Implement recursive copy with reproducible order.
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dos_dircopy() {
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local entry
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local baseentry
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for entry in "$1"/* ; do
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if [ -f "$entry" ]; then
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mcopy -i "$OUTPUT.kernel" "$entry" ::"$2"
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elif [ -d "$entry" ]; then
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baseentry="$(basename "$entry")"
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mmd -i "$OUTPUT.kernel" ::"$2""$baseentry"
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dos_dircopy "$entry" "$2""$baseentry"/
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fi
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done
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}
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[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
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dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
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if [ -n "$GUID" ]; then
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[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$((ROOTFSOFFSET + ROOTFSSIZE))" conv=notrunc count="$sect"
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mkfs.fat --invariant -n kernel -C "$OUTPUT.kernel" -S 512 "$((KERNELSIZE / 1024))"
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LC_ALL=C dos_dircopy "$KERNELDIR" /
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else
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make_ext4fs -J -L kernel -l "$KERNELSIZE" ${SOURCE_DATE_EPOCH:+-T ${SOURCE_DATE_EPOCH}} "$OUTPUT.kernel" "$KERNELDIR"
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fi
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dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
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rm -f "$OUTPUT.kernel"
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