#! /bin/sh
#
# gnuk-emulation-setup - Generate flash image for Gnuk
#
# Copyright (C) 2017  Free Software Initiative of Japan
# Author: NIIBE Yutaka <gniibe@fsij.org>
#
# This file is a part of Gnuk, a GnuPG USB Token implementation.
#
# Gnuk is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Gnuk is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

if test "$1" = "--help"; then
    echo "Usage:"
    echo "	$0 [output-file]"
    echo "		Generate Gnuk flash image"
    echo "	$0 --help"
    echo "		Show this message"
    exit 0
fi

OUTPUT_FILE=${1:-$HOME/.gnuk-flash-image}

# Generate 8192-byte flash data into OUTPUT_FILE

exec > $OUTPUT_FILE

for i in $(seq 512); do
    /bin/echo -n -e '\xff\xff\xff\xff\xff\xff\xff\xff'
done

/bin/echo -n -e '\x00\x00\xff\xff\xff\xff\xff\xff'

for i in $(seq 511); do
    /bin/echo -n -e '\xff\xff\xff\xff\xff\xff\xff\xff'
done

chmod og-rw $OUTPUT_FILE