#!/usr/bin/env bash # Copyright (C) 2006-2010 OpenWrt.org set -x [ $# == 5 ] || { echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image>" exit 1 } OUTPUT="$1" KERNELSIZE="$2" KERNELDIR="$3" ROOTFSSIZE="$4" ROOTFSIMAGE="$5" rm -f "$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 ${ROOTFSSIZE}m` KERNELOFFSET="$(($1 / 512))" KERNELSIZE="$(($2 / 512))" ROOTFSOFFSET="$(($3 / 512))" ROOTFSSIZE="$(($4 / 512))" BLOCKS="$((($KERNELSIZE / 2) - 1))" [ -n "$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 [ -n "$NOGRUB" ] && exit 0 genext2fs -d "$KERNELDIR" -b "$BLOCKS" "$OUTPUT.kernel" dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc rm -f "$OUTPUT.kernel" which chpax >/dev/null && chpax -zp $(which grub) grub --batch --no-curses --no-floppy --device-map=/dev/null <<EOF device (hd0) $OUTPUT geometry (hd0) $cyl $head $sect root (hd0,0) setup (hd0) quit EOF