kernfs_test.c

 1// SPDX-License-Identifier: GPL-2.0
 2#define _GNU_SOURCE
 3#define __SANE_USERSPACE_TYPES__
 4
 5#include <fcntl.h>
 6#include <stdio.h>
 7#include <sys/stat.h>
 8#include <sys/xattr.h>
 9
10#include "kselftest_harness.h"
11#include "wrappers.h"
12
13TEST(kernfs_listxattr)
14{
15	int fd;
16
17	/* Read-only file that can never have any extended attributes set. */
18	fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
19	ASSERT_GE(fd, 0);
20	ASSERT_EQ(flistxattr(fd, NULL, 0), 0);
21	EXPECT_EQ(close(fd), 0);
22}
23
24TEST(kernfs_getxattr)
25{
26	int fd;
27	char buf[1];
28
29	/* Read-only file that can never have any extended attributes set. */
30	fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
31	ASSERT_GE(fd, 0);
32	ASSERT_LT(fgetxattr(fd, "user.foo", buf, sizeof(buf)), 0);
33	ASSERT_EQ(errno, ENODATA);
34	EXPECT_EQ(close(fd), 0);
35}
36
37TEST_HARNESS_MAIN
38