tests/generic/093

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
# Copyright (c) 2017 Google, Inc.  All Rights Reserved.
#
# FS QA Test No. 093
#
# Test clearing of capabilities on write.
#
. ./common/preamble
_begin_fstest attr cap auto

# Import common functions.
. ./common/filter
. ./common/attr

# Override the default cleanup function.
_cleanup()
{
    [ -n "$TEST_DIR" ] && rm -f $file
}

filefilter()
{
    sed -e "s#$file#file#"
}

# real QA test starts here
_supported_fs generic

_require_test
_require_attrs security
_require_user
_require_test_program "writemod"
_require_command "$SETCAP_PROG" "setcap"
_require_command "$GETCAP_PROG" "getcap"

echo ""
file=$TEST_DIR/$seq.file

rm -f $file
touch $file

echo "**** Verifying that appending to file clears capabilities ****"
$SETCAP_PROG cap_chown+ep $file
_getcap $file | filefilter
echo data1 >> $file
cat $file
_getcap $file | filefilter
echo

echo "**** Verifying that appending to file doesn't clear other xattrs ****"
$SETCAP_PROG cap_chown+ep $file
$SETFATTR_PROG -n trusted.name -v value $file
echo data2 >> $file
cat $file
_getfattr -m '^trusted\.*' --absolute-names $file | filefilter

echo "**** Verifying that chmod doesn't affect open file descriptors ****"
rm -f $file
touch $file
chown $qa_user $file
chmod ugo+w $TEST_DIR
# don't use $here/src/writemod, as we're running it as a regular user, and
# $here may contain path component that a regular user doesn't have search
# permission
su $qa_user -c "src/writemod $file" | filefilter
cat $file

# success, all done
status=0
exit