#!/bin/sh

if [ $(stat $0 | awk '/Device/ { print $2 }') = "0,0" ] ; then
    echo "Don't run $0 over nfs!"
    exit 1
fi

PATH=/sbin:$PATH
export PATH

BASEDIR=boot
SIZE=1440
SYSLINUXVER=1.45

MNTPOINT=/tmp/mkimage.mnt-$$

while [ -n "$1" ] ; do
    case "$1" in
	"local")
	    IMAGES="$IMAGES boot"
	    shift
	    ;;
	"network")
	    IMAGES="$IMAGES bootnet"
	    shift;
	    ;;
	"pcmcia")
	    IMAGES="$IMAGES pcmcia"
	    shift;
	    ;;
	-f)
	    FORCE=-f
	    shift;
	    ;;
	*)
	    echo "Useage:" >&2
	    echo "$0 [-f] [network] [local]" >&2
	    exit
	    ;;
    esac
done

mkdir -p /tmp/images

if [ -z "$IMAGES" ]; then
    IMAGES="boot bootnet pcmcia"
fi

for TARGET in $IMAGES; do

    IMAGE=/tmp/images/$TARGET.img

    if [ "$FORCE" != "-f" ]; then
	if [ -f $IMAGE ]; then
	    echo "$IMAGE already exists." >&2
	    continue;
	fi
    fi

    case "$TARGET" in
	"boot")
	    ./mkinitrd local $FORCE
	    ;;
	"bootnet")
	    ./mkinitrd network $FORCE
	    ;;
	"pcmcia")
	    ./mkinitrd pcmcia $FORCE
	    ;;
    esac

    rm -f $IMAGE
    dd if=/dev/zero of=$IMAGE bs=1k count=$SIZE 2> /dev/null

    for devnum in 0 1 2 3 4 5 6 7 8; do
	if losetup /dev/loop$devnum $IMAGE 2>/dev/null ; then break; fi
    done

    if [ "$devnum" = "8" ]; then
	rm -rf $MNTPOINT $IMAGE
	echo "All of your loopback devices are in use!" >&2
	exit 1
    fi
    
    LODEV=/dev/loop$devnum


    gunzip < syslinux-$SYSLINUXVER/img1440k.gz | dd of=$LODEV
    echo `pwd`
    cp syslinux-$SYSLINUXVER/$TARGET/* boot

    # install new syslinux
    syslinux-$SYSLINUXVER/syslinux $LODEV

    mkdir $MNTPOINT
    mount -t msdos $LODEV $MNTPOINT

    (cd $BASEDIR; find . -name CVS -prune -o -print | cpio -pv $MNTPOINT)
    case "$TARGET" in
	"boot")
	    cp initrd-local.img $MNTPOINT/initrd.img
            cat $BASEDIR/syslinux.cfg | sed 's/initrd.img/initrd.img local/' >\
                $MNTPOINT/syslinux.cfg
	    ;;
	"bootnet")
	    cp initrd-network.img $MNTPOINT/initrd.img
	    cp syslinux-$SYSLINUXVER/network/* $BASEDIR/
            cat $BASEDIR/syslinux.cfg | sed 's/initrd.img/initrd.img network/' >\
                $MNTPOINT/syslinux.cfg
	    ;;
	"pcmcia")
	    cp initrd-pcmcia.img $MNTPOINT/initrd.img
            cat $BASEDIR/syslinux.cfg | sed 's/initrd.img/initrd.img pcmcia/' >\
                $MNTPOINT/syslinux.cfg
	    ;;
    esac

    df $MNTPOINT
    umount $MNTPOINT
    losetup -d $LODEV
    
    rm -rf $MNTPOINT 
done