1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3*  Copyright (c) 2016 RT-RK Institute for Computer Based Systems
4*  Author: Dejan Jovicevic <dejan.jovicevic@rt-rk.com>
5*/
6
7/*
8* Test Name: listxattr03
9*
10* Description:
11* An empty buffer of size zero can return the current size of the list
12* of extended attribute names, which can be used to estimate a suitable buffer.
13*/
14
15#include "config.h"
16#include <errno.h>
17#include <sys/types.h>
18
19#ifdef HAVE_SYS_XATTR_H
20# include <sys/xattr.h>
21#endif
22
23#include "tst_test.h"
24
25#ifdef HAVE_SYS_XATTR_H
26
27#define SECURITY_KEY	"security.ltptest"
28#define VALUE	"test"
29#define VALUE_SIZE	(sizeof(VALUE) - 1)
30
31static const char * const filename[] = {"testfile1", "testfile2"};
32
33static int check_suitable_buf(const char *name, long size)
34{
35	int n;
36	char buf[size];
37
38	n = listxattr(name, buf, sizeof(buf));
39
40	return n != -1;
41}
42
43static void verify_listxattr(unsigned int n)
44{
45	const char *name = filename[n];
46
47	TEST(listxattr(name, NULL, 0));
48	if (TST_RET == -1) {
49		tst_res(TFAIL | TTERRNO, "listxattr() failed");
50		return;
51	}
52
53	if (check_suitable_buf(name, TST_RET))
54		tst_res(TPASS, "listxattr() succeed with suitable buffer");
55	else
56		tst_res(TFAIL, "listxattr() failed with small buffer");
57}
58
59static void setup(void)
60{
61	SAFE_TOUCH(filename[0], 0644, NULL);
62
63	SAFE_TOUCH(filename[1], 0644, NULL);
64
65	SAFE_SETXATTR(filename[1], SECURITY_KEY, VALUE, VALUE_SIZE, XATTR_CREATE);
66}
67
68static struct tst_test test = {
69	.needs_tmpdir = 1,
70	.needs_root = 1,
71	.test = verify_listxattr,
72	.tcnt = ARRAY_SIZE(filename),
73	.setup = setup,
74};
75
76#else /* HAVE_SYS_XATTR_H */
77	TST_TEST_TCONF("<sys/xattr.h> does not exist.");
78#endif
79