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#!/usr/bin/env bash
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OUTPUT="$1"
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KERNELSIZE="$2"
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KERNELIMAGE="$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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# create partition table
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set `ptgen -o "$OUTPUT" -h 16 -s 32 -l ${ALIGN} -t 0x27 -p ${KERNELSIZE}m -t 0x83 -p ${ROOTFSSIZE}m`
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KERNELOFFSET="$(($1 / 512))"
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ROOTFSOFFSET="$(($3 / 512))"
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dd if="$KERNELIMAGE" of="$OUTPUT" bs=512 conv=notrunc seek="$KERNELOFFSET"
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dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 conv=notrunc seek="$ROOTFSOFFSET"
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