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 * msgctl02.c
23 *
24 * DESCRIPTION
25 * msgctl02 - create a message queue, then issue the IPC_SET command
26 * to lower the msg_qbytes value.
27 *
28 * ALGORITHM
29 * create a message queue
30 * loop if that option was specified
31 * call msgctl() with the IPC_SET command with a new msg_qbytes value
32 * check the return code
33 * if failure, issue a FAIL message and break remaining tests
34 * otherwise,
35 * if doing functionality testing
36 * if the msg_qbytes value is the new value
37 * issue a PASS message
38 * otherwise
39 * issue a FAIL message
40 * else issue a PASS message
41 * call cleanup
42 *
43 * USAGE: <for command-line>
44 * msgctl02 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
45 * where, -c n : Run n copies concurrently.
46 * -f : Turn off functionality Testing.
47 * -i n : Execute test n times.
48 * -I x : Execute test for x seconds.
49 * -P x : Pause for x seconds between iterations.
50 * -t : Turn on syscall timing.
51 *
52 * HISTORY
53 * 03/2001 - Written by Wayne Boyer
54 *
55 * RESTRICTIONS
56 * none
57 */
58
59 #include "test.h"
60
61 #include "ipcmsg.h"
62
63 char *TCID = "msgctl02";
64 int TST_TOTAL = 1;
65
66 int msg_q_1 = -1; /* to hold the message queue id */
67
68 struct msqid_ds qs_buf;
69
70 unsigned long int new_bytes;
71
main(int ac,char ** av)72 int main(int ac, char **av)
73 {
74 int lc;
75
76 tst_parse_opts(ac, av, NULL, NULL);
77
78 setup(); /* global setup */
79
80 /* The following loop checks looping state if -i option given */
81
82 for (lc = 0; TEST_LOOPING(lc); lc++) {
83 /* reset tst_count in case we are looping */
84 tst_count = 0;
85
86 /*
87 * Set the msqid_ds structure values for the queue
88 */
89
90 TEST(msgctl(msg_q_1, IPC_SET, &qs_buf));
91
92 if (TEST_RETURN == -1) {
93 tst_resm(TFAIL | TTERRNO, "msgctl() call failed");
94 } else {
95 /* do a stat to get current queue values */
96 if ((msgctl(msg_q_1, IPC_STAT, &qs_buf) == -1)) {
97 tst_resm(TBROK, "stat on queue failed");
98 continue;
99 }
100
101 if (qs_buf.msg_qbytes == new_bytes) {
102 tst_resm(TPASS, "qs_buf.msg_qbytes is"
103 " the new value - %ld",
104 qs_buf.msg_qbytes);
105 } else {
106 tst_resm(TFAIL, "qs_buf.msg_qbytes "
107 "value is not expected");
108 tst_resm(TINFO, "expected - %ld, "
109 "received - %ld", new_bytes,
110 qs_buf.msg_qbytes);
111 }
112 }
113
114 /*
115 * decrement by one the msq_qbytes value
116 */
117 qs_buf.msg_qbytes -= 1;
118 new_bytes = qs_buf.msg_qbytes;
119 }
120
121 cleanup();
122
123 tst_exit();
124 }
125
126 /*
127 * setup() - performs all the ONE TIME setup for this test.
128 */
setup(void)129 void setup(void)
130 {
131
132 tst_sig(NOFORK, DEF_HANDLER, cleanup);
133
134 TEST_PAUSE;
135
136 /*
137 * Create a temporary directory and cd into it.
138 * This helps to ensure that a unique msgkey is created.
139 * See ../lib/libipc.c for more information.
140 */
141 tst_tmpdir();
142
143 /* get a message key */
144 msgkey = getipckey();
145
146 /* make sure the initial # of bytes is 0 in our buffer */
147 qs_buf.msg_qbytes = 0x3000;
148
149 /* now we have a key, so let's create a message queue */
150 if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW)) == -1) {
151 tst_brkm(TBROK, cleanup, "Can't create message queue");
152 }
153
154 /* now stat the queue to get the default msg_qbytes value */
155 if ((msgctl(msg_q_1, IPC_STAT, &qs_buf)) == -1) {
156 tst_brkm(TBROK, cleanup, "Can't stat the message queue");
157 }
158
159 /* decrement msg_qbytes and copy its value */
160 qs_buf.msg_qbytes -= 1;
161 new_bytes = qs_buf.msg_qbytes;
162 }
163
164 /*
165 * cleanup() - performs all the ONE TIME cleanup for this test at completion
166 * or premature exit.
167 */
cleanup(void)168 void cleanup(void)
169 {
170 /* if it exists, remove the message queue */
171 rm_queue(msg_q_1);
172
173 tst_rmdir();
174
175 }
176