make_esp_file() {
    local file sizekb loader device mntpt efibootname

    file=$1
    sizekb=$2
    loader=$3

    dd if=/dev/zero of="${file}" bs=1k count="${sizekb}"
    device=$(mdconfig -a -t vnode -f "${file}")
    newfs_msdos -F 32 -c 1 -L EFISYS "/dev/${device}" > /dev/null 2>&1
    mntpt=$(mktemp -d /tmp/stand-test.XXXXXX)
    mount -t msdosfs "/dev/${device}" "${mntpt}"
    mkdir -p "${mntpt}/EFI/BOOT"
    efibootname=bootaa64
    cp "${loader}" "${mntpt}/EFI/BOOT/${efibootname}.efi"
    umount "${mntpt}"
    rmdir "${mntpt}"
    mdconfig -d -u "${device}"
}

echo '/dev/vtbd0p2 / ufs rw,noatime 1 1' > /src/FreeBSD/tftproot/qemu/etc/fstab
echo './etc/fstab type=file uname=root gname=wheel mode=644' \ >> /src/FreeBSD/tftproot/qemu/METALOG
sed -i '' -E 's/(time=[0-9]*)\.[0-9]*/\1.0/' /src/FreeBSD/tftproot/qemu/METALOG


echo '/dev/ufs/FreeBSD_Install / ufs ro,noatime 1 1' > ${1}/etc/fstab
echo 'root_rw_mount="NO"' > ${1}/etc/rc.conf.local

# Make an ESP in a file.
espfilename=$(mktemp /tmp/efiboot.XXXXXX)
make_esp_file ${espfilename} 33292 /src/FreeBSD/tftproot/qemu/boot/loader.efi

cd /src/FreeBSD/tftproot/qemu &&
/usr/sbin/makefs -B little -f 10000  -o version=2 -D ../rootfs.img . &&
/usr/bin/mkimg -s gpt -p efi:=${espfilename} -p freebsd-ufs:=../rootfs.img -o ../disk.img