1#!/usr/bin/env bash 2# Copyright (C) 2006 - 2007 OpenWrt.org 3set -x 4[ $# == 5 ] || { 5 echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image>" 6 exit 1 7} 8 9OUTPUT="$1" 10KERNELSIZE="$2" 11KERNELDIR="$3" 12ROOTFSSIZE="$4" 13ROOTFSIMAGE="$5" 14 15rm -f "$OUTPUT" 16 17head=16 18sect=63 19cyl=$(( ($KERNELSIZE + $ROOTFSSIZE) * 1024 * 1024 / ($head * $sect * 512))) 20 21# create partition table 22set `ptgen -o "$OUTPUT" -h $head -s $sect -p ${KERNELSIZE}m -p ${ROOTFSSIZE}m` 23 24KERNELOFFSET="$(($1 / 512))" 25KERNELSIZE="$(($2 / 512))" 26ROOTFSOFFSET="$(($3 / 512))" 27ROOTFSSIZE="$(($4 / 512))" 28 29BLOCKS="$((($KERNELSIZE / 2) - 1))" 30 31genext2fs -d "$KERNELDIR" -b "$BLOCKS" "$OUTPUT.kernel" 32dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc 33[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE" 34dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc 35#rm -f "$OUTPUT.kernel" 36