#!/bin/sh
SDCARD_DISK="$1"
if ! [ -n "$SDCARD_DISK" ] ; then
	cat << EOF >&2
ERROR: could not automatically detect an SD card. Please insert an SD card of
approx. 8GB, or manually set SDCARD_DISK in ./makefile
EOF
	exit 1
fi
if ! [ -w "$SDCARD_DISK" ] ; then
	echo "ERROR: cannot not write to $SDCARD_DISK. Are you root?" >&2
	exit 1
fi
if ! [ -b "$SDCARD_DISK" ] ; then
	echo "ERROR: $SDCARD_DISK does not appear to be a block device" >&2
	exit 1
fi

set -e

sfdisk "$SDCARD_DISK" << 'EOF'
label: dos
,64M,0E,*
,+  ,83,
EOF