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 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 */ 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 */ 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 */ 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
