-#!/usr/bin/env bash
+#!/bin/sh
# Copyright (C) 2006-2012 OpenWrt.org
set -e -x
-[ $# == 5 -o $# == 6 ] || {
+if [ $# -ne 5 ] && [ $# -ne 6 ]; then
echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
exit 1
-}
+fi
OUTPUT="$1"
KERNELSIZE="$2"
KERNELDIR="$3"
+KERNELPARTTYPE=${KERNELPARTTYPE:-83}
ROOTFSSIZE="$4"
ROOTFSIMAGE="$5"
+ROOTFSPARTTYPE=${ROOTFSPARTTYPE:-83}
ALIGN="$6"
rm -f "$OUTPUT"
head=16
sect=63
-cyl=$(( (KERNELSIZE + ROOTFSSIZE) * 1024 * 1024 / (head * sect * 512)))
# create partition table
-set `ptgen -o "$OUTPUT" -h $head -s $sect -p ${KERNELSIZE}m -p ${ROOTFSSIZE}m ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE}`
+set $(ptgen -o "$OUTPUT" -h $head -s $sect ${GUID:+-g} -t "${KERNELPARTTYPE}" -p "${KERNELSIZE}m${PARTOFFSET:+@$PARTOFFSET}" -t "${ROOTFSPARTTYPE}" -p "${ROOTFSSIZE}m" ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE} ${GUID:+-G $GUID})
KERNELOFFSET="$(($1 / 512))"
KERNELSIZE="$2"
ROOTFSOFFSET="$(($3 / 512))"
ROOTFSSIZE="$(($4 / 512))"
+# Using mcopy -s ... is using READDIR(3) to iterate through the directory
+# entries, hence they end up in the FAT filesystem in traversal order which
+# breaks reproducibility.
+# Implement recursive copy with reproducible order.
+dos_dircopy() {
+ local entry
+ local baseentry
+ for entry in "$1"/* ; do
+ if [ -f "$entry" ]; then
+ mcopy -i "$OUTPUT.kernel" "$entry" ::"$2"
+ elif [ -d "$entry" ]; then
+ baseentry="$(basename "$entry")"
+ mmd -i "$OUTPUT.kernel" ::"$2""$baseentry"
+ dos_dircopy "$entry" "$2""$baseentry"/
+ fi
+ done
+}
+
[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
-make_ext4fs -J -L kernel -l "$KERNELSIZE" "$OUTPUT.kernel" "$KERNELDIR"
+if [ -n "$GUID" ]; then
+ [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$((ROOTFSOFFSET + ROOTFSSIZE))" conv=notrunc count="$sect"
+ mkfs.fat --invariant -n kernel -C "$OUTPUT.kernel" -S 512 "$((KERNELSIZE / 1024))"
+ LC_ALL=C dos_dircopy "$KERNELDIR" /
+else
+ make_ext4fs -J -L kernel -l "$KERNELSIZE" ${SOURCE_DATE_EPOCH:+-T ${SOURCE_DATE_EPOCH}} "$OUTPUT.kernel" "$KERNELDIR"
+fi
dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
rm -f "$OUTPUT.kernel"