#!/bin/sh

# Make a filesystem image.

#

# Copyright (C) 2019, 2021 Paul Boddie <paul@boddie.org.uk>

#

# This program 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 2 of

# the License, or (at your option) any later version.

#

# This program 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, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor,

# Boston, MA  02110-1301, USA

TARGET=$1

if [ -e "$TARGET" ] ; then

    echo "File already exists: $TARGET" 1>&2

    exit 1

fi

if [ ! "$TARGET" ] ; then

    echo "Creating temporary file." 1>&2

    TARGET=`mktemp`

fi

SIZE=${2:-2000}

# Make a filesystem.

  dd if=/dev/zero of="$TARGET" bs=1024 count=1 seek="$SIZE" \

> /dev/null 2>&1

if ! `/sbin/mkfs.ext2 -q "$TARGET"` ; then

    exit 1

fi

echo "$TARGET"

# vim: tabstop=4 expandtab shiftwidth=4