#!/bin/sh
# Copyright (C) 2016  Andreas Bombe <aeb@debian.org>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
#
# This script expects a testname.mkfs file as its sole argument. It must
# be a shell snippet setting the variables ARGS, SIZE and CMP_LIMIT. ARGS and
# SIZE are used in the mkfs invocation and the result is compared against a
# reference image generated from the hexdump in testname.xxd. The comparison
# is stopped after CMP_LIMIT since freshly build FAT filesystems are just
# zeros after the initial info sectors, FATs and root directory.


run_mkfs () {
	"../src/mkfs.fat" "$@"
}

run_fsck () {
	"../src/fsck.fat" "$@"
}


if [ $# -ne 1 ]; then
	echo "$0 called with wrong number of arguments"
	exit 99
fi
testname=$(basename "$1" .mkfs)


if [ "$XXD_FOUND" != "yes" ]; then
	echo "xxd not available, required by test"
	exit 77  # report test skipped
fi


. "$1" || exit 99
echo "Test $testname"

# make sure there aren't files remaining from earlier run
rm -f "${testname}.out" "${testname}.refimg"

xxd -r "${srcdir}/${testname}.xxd" "${testname}.refimg" || exit 99
run_mkfs -C -v --invariant $ARGS "${testname}.out" $SIZE || exit 99

echo
echo "Comparing..."
limitarg=
if [ -n "$CMP_LIMIT" ]; then
	limitarg="--bytes=$CMP_LIMIT"
fi
cmp $limitarg "${testname}.out" "${testname}.refimg"
success=$?

if [ $success -eq 0 ]; then
	echo
	echo "Testing fsck..."
	run_fsck -n "${testname}.out"
	success=$?
fi

rm -f "${testname}.out" "${testname}.refimg"

if [ $success -eq 2 ]; then
	# cmp reported error
	exit 99
fi
exit $success