1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20/*
21 * NAME
22 *	sched_getscheduler01.C
23 *
24 * DESCRIPTION
25 *	Testcase to check sched_getscheduler() returns correct return value
26 *
27 * ALGORTIHM
28 *	Call sched_setcheduler() to set the scheduling policy of the current
29 *	process. Then call sched_getscheduler() to ensure that this is same
30 *	as what set by the previous call to sched_setscheduler().
31 *
32 *	Use SCHED_RR, SCHED_FIFO, SCHED_OTHER as the scheduling policies for
33 *	sched_setscheduler().
34 *
35 * USAGE:  <for command-line>
36 *  sched_getscheduler01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
37 *     where,  -c n : Run n copies concurrently.
38 *             -f   : Turn off functionality Testing.
39 *             -i n : Execute test n times.
40 *             -I x : Execute test for x seconds.
41 *             -P x : Pause for x seconds between iterations.
42 *             -t   : Turn on syscall timing.
43 *
44 * RESTRICTION
45 *	Must run test as root.
46 */
47
48#include <errno.h>
49#include <sched.h>
50#include <stdio.h>
51#include "test.h"
52
53char *TCID = "sched_getscheduler01";
54int TST_TOTAL = 3;
55
56void setup(void);
57void cleanup(void);
58
59struct test_case_t {
60	int prio;
61	int policy;
62} TC[] = {
63	/* set scheduling policy to SCHED_RR */
64	{
65	1, SCHED_RR},
66	    /* set scheduling policy to SCHED_OTHER */
67	{
68	0, SCHED_OTHER},
69	    /* set scheduling policy to SCHED_FIFO */
70	{
71	1, SCHED_FIFO}
72};
73
74int main(int ac, char **av)
75{
76	int lc;
77	int i;
78	struct sched_param param;
79
80	tst_parse_opts(ac, av, NULL, NULL);
81
82	setup();
83
84	for (lc = 0; TEST_LOOPING(lc); lc++) {
85
86		tst_count = 0;
87
88		for (i = 0; i < TST_TOTAL; i++) {
89
90			param.sched_priority = TC[i].prio;
91
92			if (sched_setscheduler(0, TC[i].policy, &param) == -1)
93				tst_brkm(TBROK, cleanup,
94					 "sched_setscheduler failed");
95
96			TEST(sched_getscheduler(0));
97
98			if (TEST_RETURN == -1) {
99				tst_resm(TFAIL, "call failed unexpectedly");
100				continue;
101			}
102
103			if (TEST_RETURN != TC[i].policy)
104				tst_resm(TFAIL,
105					 "policy value returned is not "
106					 "correct");
107			else
108				tst_resm(TPASS,
109					 "policy value returned is correct");
110		}
111	}
112
113	cleanup();
114	tst_exit();
115}
116
117void setup(void)
118{
119
120	tst_require_root();
121
122	tst_sig(NOFORK, DEF_HANDLER, cleanup);
123
124	TEST_PAUSE;
125}
126
127void cleanup(void)
128{
129}
130