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 * semop04.c
23 *
24 * DESCRIPTION
25 * semop04 - test for EAGAIN error
26 *
27 * ALGORITHM
28 * create a semaphore set with read and alter permissions
29 * loop if that option was specified
30 * call semop() with two different invalid cases
31 * check the errno value
32 * issue a PASS message if we get EAGAIN
33 * otherwise, the tests fails
34 * issue a FAIL message
35 * call cleanup
36 *
37 * USAGE: <for command-line>
38 * semop04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
39 * where, -c n : Run n copies concurrently.
40 * -e : Turn on errno logging.
41 * -i n : Execute test n times.
42 * -I x : Execute test for x seconds.
43 * -P x : Pause for x seconds between iterations.
44 * -t : Turn on syscall timing.
45 *
46 * HISTORY
47 * 03/2001 - Written by Wayne Boyer
48 *
49 * RESTRICTIONS
50 * none
51 */
52
53 #include "ipcsem.h"
54
55 char *TCID = "semop04";
56 int TST_TOTAL = 2;
57
58 int sem_id_1 = -1;
59
60 struct sembuf s_buf;
61
62 struct test_case_t {
63 union semun get_arr;
64 short op;
65 short flg;
66 short num;
67 int error;
68 } TC[] = {
69 /* EAGAIN sem_op = 0 */
70 { {
71 1}, 0, IPC_NOWAIT, 2, EAGAIN},
72 /* EAGAIN sem_op = -1 */
73 { {
74 0}, -1, IPC_NOWAIT, 2, EAGAIN}
75 };
76
main(int ac,char ** av)77 int main(int ac, char **av)
78 {
79 int lc;
80 int val; /* value for SETVAL */
81
82 int i;
83
84 tst_parse_opts(ac, av, NULL, NULL);
85
86 setup(); /* global setup */
87
88 /* The following loop checks looping state if -i option given */
89
90 for (lc = 0; TEST_LOOPING(lc); lc++) {
91 /* reset tst_count in case we are looping */
92 tst_count = 0;
93
94 val = 1;
95 for (i = 0; i < TST_TOTAL; i++) {
96
97 /* initialize the s_buf buffer */
98 s_buf.sem_op = TC[i].op;
99 s_buf.sem_flg = TC[i].flg;
100 s_buf.sem_num = TC[i].num;
101
102 /* initialize all the primitive semaphores */
103 TC[i].get_arr.val = val--;
104 if (semctl(sem_id_1, TC[i].num, SETVAL, TC[i].get_arr)
105 == -1) {
106 tst_brkm(TBROK, cleanup, "semctl() failed");
107 }
108
109 /*
110 * make the call with the TEST macro
111 */
112
113 TEST(semop(sem_id_1, &s_buf, 1));
114
115 if (TEST_RETURN != -1) {
116 tst_resm(TFAIL, "call succeeded unexpectedly");
117 continue;
118 }
119
120 if (TEST_ERRNO == TC[i].error) {
121 tst_resm(TPASS,
122 "expected failure - errno = %d"
123 " : %s", TEST_ERRNO,
124 strerror(TEST_ERRNO));
125 } else {
126 tst_resm(TFAIL, "unexpected error - "
127 "%d : %s", TEST_ERRNO,
128 strerror(TEST_ERRNO));
129 }
130 }
131 }
132
133 cleanup();
134
135 tst_exit();
136 }
137
138 /*
139 * setup() - performs all the ONE TIME setup for this test.
140 */
setup(void)141 void setup(void)
142 {
143
144 tst_sig(NOFORK, DEF_HANDLER, cleanup);
145
146 TEST_PAUSE;
147
148 /*
149 * Create a temporary directory and cd into it.
150 * This helps to ensure that a unique msgkey is created.
151 * See ../lib/libipc.c for more information.
152 */
153 tst_tmpdir();
154
155 /* get an IPC resource key */
156 semkey = getipckey();
157
158 /* create a semaphore set with read and alter permissions */
159 /* and PSEMS "primitive" semaphores */
160 if ((sem_id_1 =
161 semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)) == -1) {
162 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
163 }
164 }
165
166 /*
167 * cleanup() - performs all the ONE TIME cleanup for this test at completion
168 * or premature exit.
169 */
cleanup(void)170 void cleanup(void)
171 {
172 /* if it exists, remove the semaphore resource */
173 rm_sema(sem_id_1);
174
175 tst_rmdir();
176
177 }
178