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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) Zilogic Systems Pvt. Ltd., 2018
* Email: code@zilogic.com
*/
/*\
* [Description]
*
* This code tests the following flags with statx syscall:
*
* - AT_EMPTY_PATH
* - AT_SYMLINK_NOFOLLOW
*
* A test file and a link for it is created.
*
* To check empty path flag, test file fd alone is passed.
* Predefined size of testfile is checked against obtained value.
*
* To check symlink no follow flag, the linkname is statxed.
* To ensure that link is not dereferenced, obtained inode is compared
* with test file inode.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <inttypes.h>
#include "tst_test.h"
#include "tst_safe_macros.h"
#include "lapi/stat.h"
#define TESTFILE "test_temp"
#define LINK_FILE "test_temp_ln"
#define MODE 0644
#define SIZE 14
static int file_fd;
static void test_empty_path(void)
{
struct statx buf;
TEST(statx(file_fd, "", AT_EMPTY_PATH, 0, &buf));
if (TST_RET == 0)
tst_res(TPASS,
"statx(file_fd, \"\", AT_EMPTY_PATH, 0, &buf)");
else
tst_brk(TFAIL | TTERRNO,
"statx(file_fd, \"\", AT_EMPTY_PATH, 0, &buff)");
if (buf.stx_size == SIZE)
tst_res(TPASS,
"stx_size(%"PRIu64") is correct", (uint64_t)buf.stx_size);
else
tst_res(TFAIL,
"stx_size(%"PRIu64") is not same as expected(%u)",
(uint64_t)buf.stx_size, SIZE);
}
static void test_sym_link(void)
{
struct statx fbuf;
struct statx lbuf;
TEST(statx(AT_FDCWD, TESTFILE, 0, 0, &fbuf));
if (TST_RET == 0)
tst_res(TPASS,
"statx(AT_FDCWD, %s, 0, 0, &fbuf)", TESTFILE);
else
tst_brk(TFAIL | TTERRNO,
"statx(AT_FDCWD, %s, 0, 0, &fbuf)", TESTFILE);
TEST(statx(AT_FDCWD, LINK_FILE, AT_SYMLINK_NOFOLLOW, 0, &lbuf));
if (TST_RET == 0)
tst_res(TPASS,
"statx(AT_FDCWD, %s, AT_SYMLINK_NOFOLLOW, 0,&lbuf)",
LINK_FILE);
else
tst_brk(TFAIL | TTERRNO,
"statx(AT_FDCWD, %s, AT_SYMLINK_NOFOLLOW, 0,&lbuf)",
LINK_FILE);
if (fbuf.stx_ino != lbuf.stx_ino)
tst_res(TPASS, "Statx symlink flag worked as expected");
else
tst_res(TFAIL,
"Statx symlink flag failed to work as expected");
}
static struct tcase {
void (*tfunc)(void);
} tcases[] = {
{&test_empty_path},
{&test_sym_link}
};
static void run(unsigned int i)
{
tcases[i].tfunc();
}
static void setup(void)
{
char data_buf[SIZE] = "LinusTorvalds";
file_fd = SAFE_OPEN(TESTFILE, O_RDWR | O_CREAT, MODE);
SAFE_WRITE(SAFE_WRITE_ANY, file_fd, data_buf, sizeof(data_buf));
SAFE_SYMLINK(TESTFILE, LINK_FILE);
}
static void cleanup(void)
{
if (file_fd > 0)
SAFE_CLOSE(file_fd);
}
static struct tst_test test = {
.test = run,
.tcnt = ARRAY_SIZE(tcases),
.setup = setup,
.cleanup = cleanup,
.min_kver = "4.11",
.needs_tmpdir = 1,
};
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