apfstests/tests/generic/355

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat Inc.,  All Rights Reserved.
#
# FS QA Test 355
#
# Test clear of suid/sgid on direct write.
#
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

rm -f $seqres.full

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_test
_require_user
_require_odirect

testfile=$TEST_DIR/$seq.test
rm -f $testfile

do_io()
{
	su $qa_user -c "$XFS_IO_PROG -d -c 'pwrite 0 4k' $testfile" \
		>>$seqres.full
}

echo "Check that suid/sgid bits are cleared after direct write"

# create testfile and set base ownership & permission
echo "this is a test" >> $testfile
chmod 644 $testfile
chown $qa_user:$qa_user $testfile

echo "== with no exec perm"
chmod ug+s $testfile
echo -n "before: "; stat -c '%A' $testfile
do_io
echo -n "after:  "; stat -c '%A' $testfile

echo "== with user exec perm"
chmod ug+s $testfile
chmod u+x $testfile
echo -n "before: "; stat -c '%A' $testfile
do_io
echo -n "after:  "; stat -c '%A' $testfile

echo "== with group exec perm"
chmod ug+s $testfile
chmod g+x $testfile
chmod u-x $testfile
echo -n "before: "; stat -c '%A' $testfile
do_io
echo -n "after:  "; stat -c '%A' $testfile

echo "== with user+group exec perm"
chmod ug+s $testfile
chmod u+x $testfile
echo -n "before: "; stat -c '%A' $testfile
do_io
echo -n "after:  "; stat -c '%A' $testfile

# success, all done
status=0
exit