testcases/kernel/syscalls/creat/creat03.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines Corp., 2001
 * Ported to LTP: Wayne Boyer
 */

/*
 * Testcase to check whether the sticky bit cleared.
 * Creat a new file, fstat.st_mode should have the 01000 bit off
 */

#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "tst_test.h"

static char pfilname[40];
static int fd;

static void verify_creat(void)
{
	struct stat statbuf;

	fd = creat(pfilname, 444);

	if (fd == -1) {
		tst_res(TFAIL | TERRNO, "creat(%s) failed", pfilname);
		return;
	}

	SAFE_FSTAT(fd, &statbuf);

	tst_res(TINFO, "Created file has mode = 0%o", statbuf.st_mode);

	if ((statbuf.st_mode & S_ISVTX) != 0)
		tst_res(TFAIL, "save text bit not cleared");
	else
		tst_res(TPASS, "save text bit cleared");

	SAFE_CLOSE(fd);
}

static void setup(void)
{
	sprintf(pfilname, "./creat03.%d", getpid());
}

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

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