tests/generic/685

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 Oracle.  All Rights Reserved.
#
# FS QA Test No. 685
#
# Functional test for dropping suid and sgid bits as part of a fzero.
#
. ./common/preamble
_begin_fstest auto clone quick

# Override the default cleanup function.
_cleanup()
{
	cd /
	rm -r -f $tmp.* $junk_dir
}

# Import common functions.
. ./common/filter
. ./common/reflink

# real QA test starts here

# Modify as appropriate.
_supported_fs generic
_require_user
_require_test
verb=fzero
_require_xfs_io_command $verb

junk_dir=$TEST_DIR/$seq
junk_file=$junk_dir/a
mkdir -p $junk_dir/
chmod a+rw $junk_dir/

setup_testfile() {
	rm -f $junk_file
	_pwrite_byte 0x58 0 192k $junk_file >> $seqres.full
	sync
}

commit_and_check() {
	local user="$1"
	local command="$2"
	local start="$3"
	local end="$4"

	stat -c '%a %A %n' $junk_file | _filter_test_dir

	local cmd="$XFS_IO_PROG -c '$command $start $end' $junk_file"
	if [ -n "$user" ]; then
		su - "$user" -c "$cmd" >> $seqres.full
	else
		$SHELL -c "$cmd" >> $seqres.full
	fi

	stat -c '%a %A %n' $junk_file | _filter_test_dir

	# Blank line in output
	echo
}

# Commit to a non-exec file by an unprivileged user clears suid and sgid.
echo "Test 1 - qa_user, non-exec file $verb"
setup_testfile
chmod a+rws $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a group-exec file by an unprivileged user clears suid and sgid.
echo "Test 2 - qa_user, group-exec file $verb"
setup_testfile
chmod g+x,a+rws $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a user-exec file by an unprivileged user clears suid and sgid.
echo "Test 3 - qa_user, user-exec file $verb"
setup_testfile
chmod u+x,a+rws,g-x $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a all-exec file by an unprivileged user clears suid and sgid.
echo "Test 4 - qa_user, all-exec file $verb"
setup_testfile
chmod a+rwxs $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a non-exec file by root leaves suid and sgid.
echo "Test 5 - root, non-exec file $verb"
setup_testfile
chmod a+rws $junk_file
commit_and_check "" "$verb" 64k 64k

# Commit to a group-exec file by root leaves suid and sgid.
echo "Test 6 - root, group-exec file $verb"
setup_testfile
chmod g+x,a+rws $junk_file
commit_and_check "" "$verb" 64k 64k

# Commit to a user-exec file by root leaves suid and sgid.
echo "Test 7 - root, user-exec file $verb"
setup_testfile
chmod u+x,a+rws,g-x $junk_file
commit_and_check "" "$verb" 64k 64k

# Commit to a all-exec file by root leaves suid and sgid.
echo "Test 8 - root, all-exec file $verb"
setup_testfile
chmod a+rwxs $junk_file
commit_and_check "" "$verb" 64k 64k

# Commit to a non-exec file by an unprivileged user leaves sgid.
echo "Test 9 - qa_user, non-exec file $verb, only sgid"
setup_testfile
chmod a+rw,g+rws $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a group-exec file by an unprivileged user clears sgid
echo "Test 10 - qa_user, group-exec file $verb, only sgid"
setup_testfile
chmod a+rw,g+rwxs $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a user-exec file by an unprivileged user clears sgid
echo "Test 11 - qa_user, user-exec file $verb, only sgid"
setup_testfile
chmod a+rw,u+x,g+rws $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# Commit to a all-exec file by an unprivileged user clears sgid.
echo "Test 12 - qa_user, all-exec file $verb, only sgid"
setup_testfile
chmod a+rwx,g+rwxs $junk_file
commit_and_check "$qa_user" "$verb" 64k 64k

# success, all done
status=0
exit