tests/generic/394

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 394
#
# Make sure fs honors file size resource limit.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	ulimit -f unlimited
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# need a wrapper function so "File size limit exceeded" message can be filtered
do_truncate()
{
	$XFS_IO_PROG -fc "truncate $1" $2
}

# real QA test starts here
_supported_fs generic
_require_test

# set max file size to 1G (in block number of 1k blocks), so it should be big
# enough to let test run without bringing any trouble to test harness
ulimit -f $((1024 * 1024))
# default action to SIGXFSZ is coredump, limit core file size to 0 to avoid
# such core files after each test run
ulimit -c 0

# exercise file size limit boundaries
do_truncate $((1024 * 1024 * 1024 - 1))	$TEST_DIR/$seq.$$-1
do_truncate $((1024 * 1024 * 1024))	$TEST_DIR/$seq.$$
do_truncate $((1024 * 1024 * 1024 + 1))	$TEST_DIR/$seq.$$+1 2>&1 | \
	grep -o "File size limit exceeded"

# success, all done
status=0
exit