1#!/usr/bin/env bash 2# Copyright (C) 2006-2012 OpenWrt.org 3set -x 4[ $# == 5 -o $# == 6 ] || { 5 echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]" 6 exit 1 7} 8 9OUTPUT="$1" 10KERNELSIZE="$2" 11KERNELDIR="$3" 12ROOTFSSIZE="$4" 13ROOTFSIMAGE="$5" 14ALIGN="$6" 15 16rm -f "$OUTPUT" 17 18head=16 19sect=63 20cyl=$(( ($KERNELSIZE + $ROOTFSSIZE) * 1024 * 1024 / ($head * $sect * 512))) 21 22# create partition table 23set `ptgen -o "$OUTPUT" -h $head -s $sect -p ${KERNELSIZE}m -p ${ROOTFSSIZE}m ${ALIGN:+-l $ALIGN}` 24 25KERNELOFFSET="$(($1 / 512))" 26KERNELSIZE="$(($2 / 512))" 27ROOTFSOFFSET="$(($3 / 512))" 28ROOTFSSIZE="$(($4 / 512))" 29 30BLOCKS="$((($KERNELSIZE / 2) - 1))" 31 32[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE" 33dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc 34 35[ -n "$NOGRUB" ] && exit 0 36 37genext2fs -d "$KERNELDIR" -b "$BLOCKS" "$OUTPUT.kernel" 38dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc 39rm -f "$OUTPUT.kernel" 40