1 /*
2  * Copyright (c) International Business Machines  Corp., 2001
3  *  07/2001 Ported by Wayne Boyer
4  *  11/2016 Modified by Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY;  without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 /*
21  * Verify that getpriority(2) succeeds get the scheduling priority of
22  * the current process, process group or user, and the priority values
23  * are in the ranges of [0, 0], [0, 0] and [-20, 0] by default for the
24  * flags PRIO_PROCESS, PRIO_PGRP and PRIO_USER respectively.
25  */
26 
27 #include <errno.h>
28 #include <sys/resource.h>
29 #include <sys/time.h>
30 #include "tst_test.h"
31 
32 static struct tcase {
33 	int which;
34 	int min;
35 	int max;
36 } tcases[] = {
37 	{PRIO_PROCESS, 0, 0},
38 	{PRIO_PGRP, 0, 0},
39 	{PRIO_USER, -20, 0}
40 };
41 
42 static void verify_getpriority(unsigned int n)
43 {
44 	struct tcase *tc = &tcases[n];
45 
46 	TEST(getpriority(tc->which, 0));
47 
48 	if (TEST_ERRNO != 0) {
49 		tst_res(TFAIL | TTERRNO, "getpriority(%d, 0) failed",
50 			tc->which);
51 		return;
52 	}
53 
54 	if (TEST_RETURN < tc->min || TEST_RETURN > tc->max) {
55 		tst_res(TFAIL, "getpriority(%d, 0) returned %ld, "
56 			"expected in the range of [%d, %d]",
57 			tc->which, TEST_RETURN, tc->min, tc->max);
58 		return;
59 	}
60 
61 	tst_res(TPASS, "getpriority(%d, 0) returned %ld",
62 		tc->which, TEST_RETURN);
63 }
64 
65 static struct tst_test test = {
66 	.tcnt = ARRAY_SIZE(tcases),
67 	.test = verify_getpriority,
68 };
69