insmod part_msdos
insmod part_bsd
insmod part_gpt

# check for symlinks to boot pair
if [ -f (xen/xvda,msdos1)/vmlinuz ] ; then
	set root=(xen/xvda,msdos1)
	set dev=xvda1
	echo 'got msdos1, fire missle'
else
	if [ -f (xen/xvda)/vmlinuz ] ; then
		set root=(xen/xvda)
		set dev=xvda
		echo 'got flat device, fire missle'
	else
		echo "continuing, looking for legacy or grub2"
	fi
fi
if [ $root != 'memdisk' ]; then
	insmod xzio
	insmod gzio
	insmod btrfs
	insmod ext2
	echo 'Loading Linux ...'
# set fallback kernel append string	
	set btcmd="ro noresume selinux=0 console=hvc0 nopti"

# two ways to get from user: via xl cfg (extra) or via grubenv file	
	# allow cmdline from userspace
	if [ -z ${xen_cmdline} ] ; then
	if [ -f "($root)/boot/grub/.xenpv" ] ; then
		echo 'grab cmdline from file'
		load_env -f "($root)/boot/grub/.xenpv"
	fi
	linux /vmlinuz root=/dev/$dev $btcmd

	else
	echo 'grab cmdline from env via xenstore utils'
	linux /vmlinuz  ${xen_cmdline}
	fi
	echo 'Loading initial ramdisk ...'
	initrd /initrd.img
	boot
fi

# legacy grub in flat device
if [ -f (xen/xvda)/boot/grub/menu.lst ] ; then
        set root=(xen/xvda)
	echo "got legacy config in flat device"
        legacy_configfile /boot/grub/menu.lst
fi


# legacy grub in single partition
if [ -f (xen/xvda,msdos1)/boot/grub/menu.lst ] ; then
	set root=(xen/xvda,msdos1)
	echo "got legacy config in msdos1"
	legacy_configfile /boot/grub/menu.lst
fi

# look for grub2 config in flat device
        for maindir in / boot/ ; do
                for subdir in grub2 grub; do
                        if [ -f "(xen/xvda)/$maindir/$subdir/grub.cfg" ]; then
                                set root=(xen/xvda)
                                echo "got grub.cfg grub2 in flat device"
                                configfile /$maindir/$subdir/grub.cfg
                        fi
                        if [ -f "(xen/xvdc)/$maindir/$subdir/grub.cfg" ]; then
                                set root=(xen/xvdc)
                                echo "got grub.cfg grub2 in flat device"
                                configfile /$maindir/$subdir/grub.cfg
                        fi
                done
        done

# look for grub2 config
for part in msdos1 gpt1 bsd1 ; do
        for maindir in / boot/ ; do
                for subdir in grub2 grub; do
                        if [ -f "(xen/xvdb,$part)/$maindir/$subdir/grub.cfg" ]; then
                                set root=(xen/xvdb,$part)
                                echo "got grub.cfg grub2 in $part"
                                configfile /$maindir/$subdir/grub.cfg
                        fi
                done
        done
done


# look for grub2 config
for part in msdos1 gpt1 bsd1 msdos2 gpt2 bsd2; do
	for maindir in / boot/ ; do
		for subdir in grub grub2; do
			if [ -f "(xen/xvda,$part)/$maindir/$subdir/grub.cfg" ]; then
				set root=(xen/xvda,$part)
				echo "got grub.cfg grub2 in $part"
				configfile /$maindir/$subdir/grub.cfg
			fi
		done
	done
done

# legacy grub with separate /boot
for part in msdos1 msdos2 msdos3;do
	if [ -f "(xen/xvda,$part)/grub/menu.lst" ] ; then
		set root=(xen/xvda,$part)
		echo 'echo got legacy grub config in $part'
		legacy_configfile /grub/menu.lst
	fi
done

set root=(xen/xvda)
legacy_configfile /boot/grub/menu.lst

# giving up, drop to a shell