1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Ported to LTP: Wayne Boyer
5 *  11/2016 Modified by Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
6 */
7
8/*
9 * Verify that,
10 *  1) getpriority(2) fails with -1 and sets errno to EINVAL if 'which'
11 *     argument was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.
12 *  2) getpriority(2) fails with -1 and sets errno to ESRCH if no
13 *     process was located for 'which' and 'who' arguments.
14 */
15
16#include <errno.h>
17#include <sys/resource.h>
18#include <sys/time.h>
19#include "tst_test.h"
20
21#define INVAL_FLAG	-1
22#define INVAL_ID	-1
23
24static struct tcase {
25	int which;
26	int who;
27	int exp_errno;
28} tcases[] = {
29	/* test 1 */
30	{INVAL_FLAG, 0, EINVAL},
31
32	/* test 2 */
33	{PRIO_PROCESS, INVAL_ID, ESRCH},
34	{PRIO_PGRP, INVAL_ID, ESRCH},
35	{PRIO_USER, INVAL_ID, ESRCH}
36};
37
38static void verify_getpriority(unsigned int n)
39{
40	struct tcase *tc = &tcases[n];
41
42	TEST(getpriority(tc->which, tc->who));
43
44	if (TST_RET != -1) {
45		tst_res(TFAIL, "getpriority(%d, %d) succeeds unexpectedly, "
46			       "returned %li", tc->which, tc->who, TST_RET);
47		return;
48	}
49
50	if (tc->exp_errno != TST_ERR) {
51		tst_res(TFAIL | TTERRNO,
52			"getpriority(%d, %d) should fail with %s",
53			tc->which, tc->who, tst_strerrno(tc->exp_errno));
54		return;
55	}
56
57	tst_res(TPASS | TTERRNO, "getpriority(%d, %d) fails as expected",
58		tc->which, tc->who);
59}
60
61static struct tst_test test = {
62	.tcnt = ARRAY_SIZE(tcases),
63	.test = verify_getpriority,
64};
65