apfstests/tests/generic/420

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Calvin Owens.  All Rights Reserved.
#
# FS QA Test 420
#
# Verify fallocate(mode=FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE) does
# not alter the file size.
#
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 /
	rm -f $tmp.*
}

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

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

# real QA test starts here

# Modify as appropriate.
_supported_fs generic
_require_test
_require_xfs_io_command fpunch

testfile="${TEST_DIR}/testfile.$seq"

echo "Testing fallocate(mode=FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE)"
$XFS_IO_PROG -f -t -c "pwrite -b 2048 0 2048" $testfile | head -n1
# fpunch from xfs_io has KEEP_SIZE flag set
$XFS_IO_PROG -c "fpunch 2048 2048" $testfile
$XFS_IO_PROG -c "stat" $testfile | grep -F 'stat.size'

# success, all done
status=0
exit