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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