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 * msgrcv04.c
23 *
24 * DESCRIPTION
25 * msgrcv04 - test for E2BIG and ENOMSG errors
26 *
27 * ALGORITHM
28 * create a message queue with read/write permissions
29 * initialize a message buffer with a known message and type
30 * enqueue the message
31 * loop if that option was specified
32 * call msgrcv() using two different invalid cases
33 * check the errno value
34 * issue a PASS message if we get E2BIG or ENOMSG
35 * otherwise, the tests fails
36 * issue a FAIL message
37 * call cleanup
38 *
39 * USAGE: <for command-line>
40 * msgrcv04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
41 * where, -c n : Run n copies concurrently.
42 * -e : Turn on errno logging.
43 * -i n : Execute test n times.
44 * -I x : Execute test for x seconds.
45 * -P x : Pause for x seconds between iterations.
46 * -t : Turn on syscall timing.
47 *
48 * HISTORY
49 * 03/2001 - Written by Wayne Boyer
50 *
51 * RESTRICTIONS
52 * none
53 */
54
55 #include "test.h"
56
57 #include "ipcmsg.h"
58
59 void cleanup(void);
60 void setup(void);
61
62 char *TCID = "msgrcv04";
63 int TST_TOTAL = 2;
64
65 int msg_q_1 = -1; /* The message queue id created in setup */
66
67 #define SMSIZE 512
68
69 MSGBUF snd_buf, rcv_buf;
70
71 struct test_case_t {
72 int size;
73 int type;
74 int flags;
75 int error;
76 } TC[] = {
77 /*
78 * E2BIG - The receive buffer is too small for the message and
79 * MSG_NOERROR isn't asserted in the flags.
80 */
81 {
82 SMSIZE, 1, 0, E2BIG},
83 /*
84 * ENOMSG - There is no message with the requested type and
85 * IPC_NOWAIT is asserted in the flags.
86 */
87 {
88 MSGSIZE, 2, IPC_NOWAIT, ENOMSG}
89 };
90
main(int ac,char ** av)91 int main(int ac, char **av)
92 {
93 int lc;
94 int i;
95
96 tst_parse_opts(ac, av, NULL, NULL);
97
98 setup(); /* global setup */
99
100 /* The following loop checks looping state if -i option given */
101
102 for (lc = 0; TEST_LOOPING(lc); lc++) {
103 /* reset tst_count in case we are looping */
104 tst_count = 0;
105
106 for (i = 0; i < TST_TOTAL; i++) {
107
108 /*
109 * Use the TEST macro to make the call
110 */
111
112 TEST(msgrcv(msg_q_1, &rcv_buf, TC[i].size, TC[i].type,
113 TC[i].flags));
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, "expected failure - errno = "
122 "%d : %s", TEST_ERRNO,
123 strerror(TEST_ERRNO));
124 } else {
125 tst_resm(TFAIL, "call failed with an "
126 "unexpected error - %d : %s",
127 TEST_ERRNO, strerror(TEST_ERRNO));
128 }
129 }
130 }
131
132 cleanup();
133
134 tst_exit();
135 }
136
137 /*
138 * setup() - performs all the ONE TIME setup for this test.
139 */
setup(void)140 void setup(void)
141 {
142
143 tst_sig(NOFORK, DEF_HANDLER, cleanup);
144
145 TEST_PAUSE;
146
147 /*
148 * Create a temporary directory and cd into it.
149 * This helps to ensure that a unique msgkey is created.
150 * See ../lib/libipc.c for more information.
151 */
152 tst_tmpdir();
153
154 msgkey = getipckey();
155
156 /* create a message queue with read/write permission */
157 if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW)) == -1) {
158 tst_brkm(TBROK, cleanup, "Can't create message queue");
159 }
160
161 /* initialize a buffer */
162 init_buf(&snd_buf, MSGTYPE, MSGSIZE);
163
164 /* put the message on the queue */
165 if (msgsnd(msg_q_1, &snd_buf, MSGSIZE, 0) == -1) {
166 tst_brkm(TBROK, cleanup, "Can't enqueue message");
167 }
168 }
169
170 /*
171 * cleanup() - performs all the ONE TIME cleanup for this test at completion
172 * or premature exit.
173 */
cleanup(void)174 void cleanup(void)
175 {
176 /* if it exists, remove the message queue that was created */
177 rm_queue(msg_q_1);
178
179 tst_rmdir();
180
181 }
182