1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2014 Fujitsu Ltd.
4 * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
5 * Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
6 */
7
8/*\
9 * [Description]
10 *
11 * Verify that after updating euid with setresuid(), any file creation
12 * also gets the new euid as its owner user ID.
13 */
14
15#include <pwd.h>
16#include <sys/stat.h>
17#include "tst_test.h"
18#include "compat_tst_16.h"
19
20#define TEMP_FILE	"testfile"
21static struct passwd *ltpuser;
22
23static void setup(void)
24{
25	ltpuser = SAFE_GETPWNAM("nobody");
26	UID16_CHECK(ltpuser->pw_uid, "setresuid");
27}
28
29static void run(void)
30{
31	struct stat buf;
32
33	TST_EXP_PASS(SETRESUID(-1, ltpuser->pw_uid, -1));
34
35	SAFE_TOUCH(TEMP_FILE, 0644, NULL);
36	SAFE_STAT(TEMP_FILE, &buf);
37
38	TST_EXP_EQ_LI(ltpuser->pw_uid, buf.st_uid);
39
40	SAFE_UNLINK(TEMP_FILE);
41	TST_EXP_PASS_SILENT(SETRESUID(-1, 0, -1));
42}
43
44static struct tst_test test = {
45	.setup = setup,
46	.test_all = run,
47	.needs_root = 1,
48	.needs_tmpdir = 1
49};
50