tests/generic/089

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 089
#
# Emulate the way Linux mount manipulates /etc/mtab to attempt to
# reproduce a possible bug in rename (see src/t_mtab.c).
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

mtab_output=$TEST_DIR/mtab_output
here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15

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

addentries()
{
	count=$1
	pattern="%0$2d"

	while [ $count -gt 0 ]; do
		touch `printf $pattern $count`
		let count=$count-1
	done
}

# real QA test starts here
_supported_fs generic
_require_test
_require_hardlinks

rm -f $seqres.full
[ "X$TEST_DIR" = "X" ] && exit 1
cd $TEST_DIR
rm -fr test
mkdir test || exit 1
cd $TEST_DIR/test
mount > t_mtab

mtab()
{
	rm -f $mtab_output
	$here/src/t_mtab 50 $mtab_output &
	$here/src/t_mtab 50 $mtab_output &
	$here/src/t_mtab 50 $mtab_output &
	wait
	cat $mtab_output

	$here/src/t_mtab 10000

	echo directory entries:
	ls | grep mtab
	echo directory entries >> $seqres.full
	ls -li >> $seqres.full
}

# directory with only a few entries
mtab

# directory with a hundred more entries, each 4chars wide
addentries 100 4
mtab

# directory with a thousand more entries, each 8chars wide
addentries 1000 8
mtab

status=0
exit