#! /bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2016 Red Hat, Inc.  All Rights Reserved.
#
# FSQA Test No. 377
#
# Test listxattr syscall behaviour with different buffer sizes.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"
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
. ./common/attr

# real QA test starts here
_supported_fs generic
_require_scratch
_require_attrs
_require_test_program "listxattr"

listxattr="$here/src/listxattr"

rm -f $seqres.full

_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount

# Create a testfile with three xattrs such that the sum of namelengths of the
# first two is bigger than the namelength of the third. This is needed for
# the 5th testcase that tests one of the cornercases.
testfile=${SCRATCH_MNT}/testfile
touch $testfile
$SETFATTR_PROG -n user.foo -v bar $testfile
$SETFATTR_PROG -n user.ping -v pong $testfile
$SETFATTR_PROG -n user.hello -v there $testfile

# 1. Call listxattr without buffer length argument. This should succeed.
$listxattr $testfile | grep '^xattr: user\.' | sort

# 2. Calling listxattr on nonexistant file should fail with -ENOENT.
$listxattr ""

# 3. Calling listxattr with buffersize not suffecient for even one xattr
# should fail with -ERANGE.
$listxattr $testfile 1

# 4. Calling listxattr with buffersize suffecient for one xattr, but not
# sufficient for the whole list should still fail with -ERANGE.
$listxattr $testfile 9

# 5. Calling listxattr with buffersize suffecient for the last xattr, but not
# sufficient for the sum of first two. Should fail with -ERANGE.
$listxattr $testfile 11

# 6. Calling listxattr with buffersize bigger than needed should succeed.
$listxattr $testfile 500 | grep '^xattr: user\.' | sort

status=0
exit