xref: /aosp_15_r20/external/ltp/testcases/kernel/syscalls/utime/utime05.c (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (c) International Business Machines  Corp., 2001
 *		07/2001 ported by John George
 *   Copyright (c) 2022 SUSE LLC Avinesh Kumar <[email protected]>
 */

/*\
 * [Description]
 *
 * Verify that the system call utime() successfully changes the last
 * access and modification times of a file to the values specified by
 * times argument, under the following constraints:
 *
 * - The times argument is not NULL.
 * - The user ID of the process is not "root".
 * - The file is owned by the user ID of the process.
 */

#include <utime.h>
#include <pwd.h>

#include "tst_test.h"

#define MNT_POINT	"mntpoint"
#define TEMP_FILE	MNT_POINT"/tmp_file"

#define FILE_MODE	0444
#define MODE_RWX	0777
#define NEW_MODF_TIME	10000
#define NEW_ACCESS_TIME	20000

#define TEST_USERNAME "nobody"

static struct utimbuf times = {
	.modtime = NEW_MODF_TIME,
	.actime = NEW_ACCESS_TIME
};

static void setup(void)
{
	struct passwd *pw;

	SAFE_CHMOD(MNT_POINT, MODE_RWX);

	pw = SAFE_GETPWNAM(TEST_USERNAME);
	tst_res(TINFO, "Switching effective user ID to user: %s", pw->pw_name);
	SAFE_SETEUID(pw->pw_uid);

	SAFE_TOUCH(TEMP_FILE, FILE_MODE, NULL);
}

static void run(void)
{
	struct stat stat_buf;

	TST_EXP_PASS(utime(TEMP_FILE, &times), "utime(%s, &times)", TEMP_FILE);
	if (!TST_PASS)
		return;

	SAFE_STAT(TEMP_FILE, &stat_buf);

	TST_EXP_EQ_LI(stat_buf.st_mtime, NEW_MODF_TIME);
	TST_EXP_EQ_LI(stat_buf.st_atime, NEW_ACCESS_TIME);
}

static struct tst_test test = {
	.test_all = run,
	.setup = setup,
	.needs_root = 1,
	.mount_device = 1,
	.mntpoint = MNT_POINT,
	.all_filesystems = 1,
	.skip_filesystems = (const char *const[]) {
		"vfat",
		"exfat",
		NULL
	}
};