1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * You should have received a copy of the GNU General Public License along
13 * with this program; if not, write the Free Software Foundation, Inc.,
14 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
15 *
16 */
17 /**********************************************************
18 *
19 * TEST IDENTIFIER : sched_rr_get_interval01
20 *
21 * EXECUTED BY : root / superuser
22 *
23 * TEST TITLE : Basic test for sched_rr_get_interval(2)
24 *
25 * TEST CASE TOTAL : 1
26 *
27 * AUTHOR : Saji Kumar.V.R <saji.kumar@wipro.com>
28 *
29 * SIGNALS
30 * Uses SIGUSR1 to pause before test if option set.
31 * (See the parse_opts(3) man page).
32 *
33 * DESCRIPTION
34 * This is a Phase I test for the sched_rr_get_interval(2) system call.
35 * It is intended to provide a limited exposure of the system call.
36 *
37 * Setup:
38 * Setup signal handling.
39 * Pause for SIGUSR1 if option specified.
40 * Change scheduling policy to SCHED_RR
41 *
42 * Test:
43 * Loop if the proper options are given.
44 * Execute system call
45 * Check return code, if it is 0,
46 * Test passed.
47 * Otherwise
48 * Test failed
49 *
50 * Cleanup:
51 * Print errno log and/or timing stats if options given
52 *
53 * USAGE: <for command-line>
54 * sched_rr_get_interval01 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
55 * where, -c n : Run n copies concurrently.
56 * -e : Turn on errno logging.
57 * -h : Show help screen
58 * -f : Turn off functional testing
59 * -i n : Execute test n times.
60 * -I x : Execute test for x seconds.
61 * -p : Pause for SIGUSR1 before starting
62 * -P x : Pause for x seconds between iterations.
63 * -t : Turn on syscall timing.
64 *
65 ****************************************************************/
66
67 #include <errno.h>
68 #include <sched.h>
69 #include "test.h"
70
71 static void setup();
72 static void cleanup();
73
74 char *TCID = "sched_rr_get_interval01";
75 int TST_TOTAL = 1;
76
77 struct timespec tp;
78
main(int ac,char ** av)79 int main(int ac, char **av)
80 {
81
82 int lc;
83
84 tst_parse_opts(ac, av, NULL, NULL);
85
86 setup();
87
88 for (lc = 0; TEST_LOOPING(lc); lc++) {
89
90 tst_count = 0;
91
92 /*
93 * Call sched_rr_get_interval(2) with pid=0 so that it will
94 * write into the timespec structure pointed to by tp, the
95 * round robin time quantum for the current process.
96 */
97 TEST(sched_rr_get_interval(0, &tp));
98
99 if (TEST_RETURN == 0) {
100 tst_resm(TPASS, "sched_rr_get_interval() returned %ld",
101 TEST_RETURN);
102 } else {
103 tst_resm(TFAIL | TTERRNO,
104 "Test Failed, sched_rr_get_interval()"
105 "returned %ld", TEST_RETURN);
106 }
107 }
108
109 /* cleanup and exit */
110 cleanup();
111 tst_exit();
112
113 }
114
115 /* setup() - performs all ONE TIME setup for this test */
setup(void)116 void setup(void)
117 {
118 tst_require_root();
119 /*
120 * Initialize scheduling parameter structure to use with
121 * sched_setscheduler()
122 */
123 struct sched_param p = { 1 };
124
125 tst_sig(NOFORK, DEF_HANDLER, cleanup);
126
127 TEST_PAUSE;
128
129 /* Change scheduling policy to SCHED_RR */
130 if ((sched_setscheduler(0, SCHED_RR, &p)) == -1) {
131 tst_brkm(TBROK, cleanup, "sched_setscheduler() failed");
132 }
133 }
134
135 /*
136 *cleanup() - performs all ONE TIME cleanup for this test at
137 * completion or premature exit.
138 */
cleanup(void)139 void cleanup(void)
140 {
141
142 }
143