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 * Test Name: nice03
22 *
23 * Test Description:
24 * Verify that any user can successfully increase the nice value of
25 * the process by passing an increment value (< max. applicable limits) to
26 * nice() system call.
27 *
28 * Expected Result:
29 * nice() should return value 0 on success and the user should succeed
30 * to increase the nice value of test process.
31 *
32 * Algorithm:
33 * Setup:
34 * Setup signal handling.
35 * Pause for SIGUSR1 if option specified.
36 *
37 * Test:
38 * Loop if the proper options are given.
39 * Execute system call
40 * Check return code, if system call failed (return=-1)
41 * Log the errno and Issue a FAIL message.
42 * Otherwise,
43 * Verify the Functionality of system call
44 * if successful,
45 * Issue Functionality-Pass message.
46 * Otherwise,
47 * Issue Functionality-Fail message.
48 * Cleanup:
49 * Print errno log and/or timing stats if options given
50 *
51 * Usage: <for command-line>
52 * nice03 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
53 * where, -c n : Run n copies concurrently.
54 * -f : Turn off functionality Testing.
55 * -i n : Execute test n times.
56 * -I x : Execute test for x seconds.
57 * -P x : Pause for x seconds between iterations.
58 * -t : Turn on syscall timing.
59 *
60 * HISTORY
61 * 07/2001 Ported by Wayne Boyer
62 *
63 * RESTRICTIONS:
64 * The maximum iterations with the -i option is 9
65 *
66 */
67
68 #include <stdio.h>
69 #include <unistd.h>
70 #include <errno.h>
71 #include <fcntl.h>
72 #include <sys/time.h>
73 #include <sys/resource.h>
74
75 #include "test.h"
76
77 char *TCID = "nice03";
78 int TST_TOTAL = 1;
79
80 #define NICEINC 2
81 int Org_nice; /* original priority of the test process */
82
83 void setup(); /* Main setup function of test */
84 void cleanup(); /* cleanup function for the test */
85
main(int ac,char ** av)86 int main(int ac, char **av)
87 {
88 int lc;
89 int New_nice; /* priority of process after nice() */
90
91 tst_parse_opts(ac, av, NULL, NULL);
92
93 setup();
94
95 for (lc = 0; TEST_LOOPING(lc); lc++) {
96
97 tst_count = 0;
98
99 /*
100 * Call nice(2) with an 'incr' parameter set
101 * to a +ve value < max. applicable limit.
102 * (Linux - 20)
103 */
104 TEST(nice(NICEINC));
105
106 /* check return code */
107 if (TEST_RETURN == -1) {
108 tst_resm(TFAIL, "nice(%d) Failed, errno=%d : %s",
109 NICEINC, TEST_ERRNO, strerror(TEST_ERRNO));
110 continue;
111 }
112
113 New_nice = getpriority(PRIO_PROCESS, 0);
114
115 /* Validate functionality of the nice() */
116 if (New_nice != (Org_nice + NICEINC)) {
117 tst_resm(TFAIL, "nice() failed to modify the "
118 "priority of process");
119 } else {
120 tst_resm(TPASS, "Functionality of nice(%d) is "
121 "correct", NICEINC);
122 }
123 Org_nice = New_nice;
124 }
125
126 cleanup();
127 tst_exit();
128 }
129
130 /*
131 * void
132 * setup() - performs all ONE TIME setup for this test.
133 * Create a temporary directory and change directory to it.
134 * Get the process id of test process.
135 * Get the current nice value of test process and save it in a file.
136 * Read the nice value from file into a variable.
137 */
setup(void)138 void setup(void)
139 {
140
141 tst_sig(NOFORK, DEF_HANDLER, cleanup);
142
143 TEST_PAUSE;
144
145 Org_nice = getpriority(PRIO_PROCESS, 0);
146 }
147
148 /*
149 * void
150 * cleanup() - performs all ONE TIME cleanup for this test at
151 * completion or premature exit.
152 */
cleanup(void)153 void cleanup(void)
154 {
155
156 }
157