#! /bin/bash

# Possible usage:
#  ALTROOT=/mnt/aux/ mk-grub-random.sh

# I hate redirecting stderr ... but dd gives me
# no other way to reduce verbosity.

randomseed=$(2>/dev/null dd iflag=fullblock             \
        if=/dev/urandom count=1 bs=24 | base64)

# Note the 0: here.
# It means zero bits of physics entropy,
# i.e. pseudorandom, not true random
grub-editenv ${ALTROOT}/boot/grub/grubenv set randomseed="0:$randomseed"