1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2021, BELLSOFT. All rights reserved.
4 * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
5 * AUTHOR: Saji Kumar.V.R <saji.kumar@wipro.com>
6 */
7
8/*\
9 * [Description]
10 *
11 * Verify that sched_setparam() fails if the user does not have proper
12 * privileges.
13 */
14
15#include <stdlib.h>
16#include <pwd.h>
17
18#include "tst_test.h"
19#include "tst_sched.h"
20
21static void run(void)
22{
23	struct sched_variant *tv = &sched_variants[tst_variant];
24	pid_t child_pid = SAFE_FORK();
25
26	if (!child_pid) {
27		struct sched_param p = { .sched_priority = 0 };
28		struct passwd *pw = SAFE_GETPWNAM("nobody");
29
30		SAFE_SETEUID(pw->pw_uid);
31		TST_EXP_FAIL(tv->sched_setparam(getppid(), &p), EPERM,
32			     "sched_setparam(%d, 0)", getppid());
33
34		exit(0);
35	}
36
37	tst_reap_children();
38}
39
40static void setup(void)
41{
42	tst_res(TINFO, "Testing %s variant", sched_variants[tst_variant].desc);
43}
44
45static struct tst_test test = {
46	.needs_root = 1,
47	.forks_child = 1,
48	.setup = setup,
49	.test_variants = ARRAY_SIZE(sched_variants),
50	.test_all = run,
51};
52