xref: /third_party/ltp/testcases/kernel/syscalls/fstat/fstat02.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines  Corp., 2001
 *  07/2001 Ported by Wayne Boyer
 *  05/2019 Ported to new library: Christian Amann <camann@suse.com>
 */

/*\
 * [Description]
 *
 * Tests if fstat() returns correctly and reports correct file information
 * using the stat structure.
 */

#include "tst_test.h"

#define TESTFILE        "test_file"
#define LINK_TESTFILE   "link_test_file"
#define FILE_SIZE       1024
#define FILE_MODE	0644
#define NLINK	        2

static struct stat stat_buf;
static uid_t user_id;
static gid_t group_id;
static int fildes;

static void run(void)
{
	TST_EXP_PASS(fstat(fildes, &stat_buf));
	TST_EXP_EQ_LU(stat_buf.st_uid, user_id);
	TST_EXP_EQ_LU(stat_buf.st_gid, group_id);
	TST_EXP_EQ_LI(stat_buf.st_size, FILE_SIZE);
	TST_EXP_EQ_LU(stat_buf.st_mode & 0777, FILE_MODE);
	TST_EXP_EQ_LU(stat_buf.st_nlink, NLINK);
}

static void setup(void)
{
	user_id  = getuid();
	group_id = getgid();

	umask(0);

	fildes = SAFE_OPEN(TESTFILE, O_WRONLY | O_CREAT, FILE_MODE);

	if (tst_fill_file(TESTFILE, 'a', FILE_SIZE, 1))
		tst_brk(TBROK, "Could not fill test file");

	SAFE_LINK(TESTFILE, LINK_TESTFILE);
}

static void cleanup(void)
{
	if (fildes > 0)
		SAFE_CLOSE(fildes);
}

static struct tst_test test = {
	.test_all = run,
	.setup = setup,
	.cleanup = cleanup,
	.needs_tmpdir = 1,
};