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,
22  *  1) getpriority(2) fails with -1 and sets errno to EINVAL if 'which'
23  *     argument was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.
24  *  2) getpriority(2) fails with -1 and sets errno to ESRCH if no
25  *     process was located for 'which' and 'who' arguments.
26  */
27 
28 #include <errno.h>
29 #include <sys/resource.h>
30 #include <sys/time.h>
31 #include "tst_test.h"
32 
33 #define INVAL_FLAG	-1
34 #define INVAL_ID	-1
35 
36 static struct tcase {
37 	int which;
38 	int who;
39 	int exp_errno;
40 } tcases[] = {
41 	/* test 1 */
42 	{INVAL_FLAG, 0, EINVAL},
43 
44 	/* test 2 */
45 	{PRIO_PROCESS, INVAL_ID, ESRCH},
46 	{PRIO_PGRP, INVAL_ID, ESRCH},
47 	{PRIO_USER, INVAL_ID, ESRCH}
48 };
49 
50 static void verify_getpriority(unsigned int n)
51 {
52 	struct tcase *tc = &tcases[n];
53 
54 	TEST(getpriority(tc->which, tc->who));
55 
56 	if (TEST_RETURN != -1) {
57 		tst_res(TFAIL, "getpriority(%d, %d) succeeds unexpectedly, "
58 			       "returned %li", tc->which, tc->who, TEST_RETURN);
59 		return;
60 	}
61 
62 	if (tc->exp_errno != TEST_ERRNO) {
63 		tst_res(TFAIL | TTERRNO,
64 			"getpriority(%d, %d) should fail with %s",
65 			tc->which, tc->who, tst_strerrno(tc->exp_errno));
66 		return;
67 	}
68 
69 	tst_res(TPASS | TTERRNO, "getpriority(%d, %d) fails as expected",
70 		tc->which, tc->who);
71 }
72 
73 static struct tst_test test = {
74 	.tcnt = ARRAY_SIZE(tcases),
75 	.test = verify_getpriority,
76 };
77