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 * msgrcv01.c
23 *
24 * DESCRIPTION
25 * msgrcv01 - test that msgrcv() receives the expected message
26 *
27 * ALGORITHM
28 * create a message queue
29 * initialize a message buffer with a known message and type
30 * loop if that option was specified
31 * fork a child to receive the message
32 * parent enqueues the message then exits
33 * check the return code
34 * if failure, issue a FAIL message.
35 * otherwise,
36 * if doing functionality testing
37 * build a new message and compare it to the one received
38 * if they are the same,
39 * issue a PASS message
40 * otherwise
41 * issue a FAIL message
42 * call cleanup
43 *
44 * USAGE: <for command-line>
45 * msgrcv01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
46 * where, -c n : Run n copies concurrently.
47 * -f : Turn off functionality Testing.
48 * -i n : Execute test n times.
49 * -I x : Execute test for x seconds.
50 * -P x : Pause for x seconds between iterations.
51 * -t : Turn on syscall timing.
52 *
53 * HISTORY
54 * 03/2001 - Written by Wayne Boyer
55 *
56 * RESTRICTIONS
57 * none
58 */
59
60 #include <string.h>
61 #include <sys/wait.h>
62
63 #include "test.h"
64
65 #include "ipcmsg.h"
66
67 void cleanup(void);
68 void setup(void);
69 void do_child(void);
70
71 char *TCID = "msgrcv01";
72 int TST_TOTAL = 1;
73
74 int msg_q_1;
75 MSGBUF snd_buf, rcv_buf, cmp_buf;
76
77 pid_t c_pid;
78
main(int ac,char ** av)79 int main(int ac, char **av)
80 {
81 int lc;
82 void check_functionality(void);
83 int status, e_code;
84
85 tst_parse_opts(ac, av, NULL, NULL);
86
87 #ifdef UCLINUX
88 maybe_run_child(&do_child, "d", &msg_q_1);
89 #endif
90
91 setup(); /* global setup */
92
93 /* The following loop checks looping state if -i option given */
94
95 for (lc = 0; TEST_LOOPING(lc); lc++) {
96 /* reset tst_count in case we are looping */
97 tst_count = 0;
98
99 /*
100 * fork a child to read from the queue while the parent
101 * enqueues the message to be read.
102 */
103 if ((c_pid = FORK_OR_VFORK()) == -1) {
104 tst_brkm(TBROK, cleanup, "could not fork");
105 }
106
107 if (c_pid == 0) { /* child */
108 #ifdef UCLINUX
109 if (self_exec(av[0], "d", msg_q_1) < 0) {
110 tst_brkm(TBROK, cleanup, "could not self_exec");
111 }
112 #else
113 do_child();
114 #endif
115 } else { /* parent */
116 /* put the message on the queue */
117 if (msgsnd(msg_q_1, &snd_buf, MSGSIZE, 0) == -1) {
118 tst_brkm(TBROK, cleanup,
119 "Couldn't enqueue" " message");
120 }
121 /* wait for the child to finish */
122 wait(&status);
123 /* make sure the child returned a good exit status */
124 e_code = status >> 8;
125 if (e_code != 0) {
126 tst_resm(TFAIL, "Failures reported above");
127 }
128
129 }
130 }
131
132 cleanup();
133 tst_exit();
134
135 /** NOT REACHED **/
136
137 }
138
139 /*
140 * do_child()
141 */
do_child(void)142 void do_child(void)
143 {
144 int retval = 0;
145
146 TEST(msgrcv(msg_q_1, &rcv_buf, MSGSIZE, 1, 0));
147
148 if (TEST_RETURN == -1) {
149 retval = 1;
150 tst_resm(TFAIL, "%s call failed - errno = %d : %s",
151 TCID, TEST_ERRNO, strerror(TEST_ERRNO));
152 } else {
153 /*
154 * Build a new message and compare it
155 * with the one received.
156 */
157 init_buf(&cmp_buf, MSGTYPE, MSGSIZE);
158
159 if (strcmp(rcv_buf.mtext, cmp_buf.mtext) == 0) {
160 tst_resm(TPASS,
161 "message received = " "message sent");
162 } else {
163 retval = 1;
164 tst_resm(TFAIL,
165 "message received != " "message sent");
166 }
167 }
168 exit(retval);
169 }
170
171 /*
172 * setup() - performs all the ONE TIME setup for this test.
173 */
setup(void)174 void setup(void)
175 {
176
177 tst_sig(FORK, DEF_HANDLER, cleanup);
178
179 TEST_PAUSE;
180
181 /*
182 * Create a temporary directory and cd into it.
183 * This helps to ensure that a unique msgkey is created.
184 * See ../lib/libipc.c for more information.
185 */
186 tst_tmpdir();
187
188 msgkey = getipckey();
189
190 /* create a message queue with read/write permission */
191 if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW)) == -1) {
192 tst_brkm(TBROK, cleanup, "Can't create message queue");
193 }
194
195 /* initialize the message buffer */
196 init_buf(&snd_buf, MSGTYPE, MSGSIZE);
197 }
198
199 /*
200 * cleanup() - performs all the ONE TIME cleanup for this test at completion
201 * or premature exit.
202 */
cleanup(void)203 void cleanup(void)
204 {
205 /* if it exists, remove the message queue that was created */
206 rm_queue(msg_q_1);
207
208 tst_rmdir();
209
210 }
211