minix/test/ipc/msgrcv/msgrcv01.c

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2009-09-21 16:53:53 +02:00
/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* NAME
* msgrcv01.c
*
* DESCRIPTION
* msgrcv01 - test that msgrcv() receives the expected message
*
* ALGORITHM
* create a message queue
* initialize a message buffer with a known message and type
* loop if that option was specified
* fork a child to receive the message
* parent enqueues the message then exits
* check the return code
* if failure, issue a FAIL message.
* otherwise,
* if doing functionality testing
* build a new message and compare it to the one received
* if they are the same,
* issue a PASS message
* otherwise
* issue a FAIL message
* call cleanup
*
* USAGE: <for command-line>
* msgrcv01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -f : Turn off functionality Testing.
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* HISTORY
* 03/2001 - Written by Wayne Boyer
*
* RESTRICTIONS
* none
*/
#include <string.h>
#include <sys/wait.h>
#include "test.h"
#include "usctest.h"
#include "ipcmsg.h"
void cleanup(void);
void setup(void);
void do_child(void);
char *TCID = "msgrcv01";
int TST_TOTAL = 1;
extern int Tst_count;
int msg_q_1;
MSGBUF snd_buf, rcv_buf, cmp_buf;
pid_t c_pid;
int main(int ac, char **av)
{
int lc; /* loop counter */
char *msg; /* message returned from parse_opts */
void check_functionality(void);
int status, e_code;
/* parse standard options */
if ((msg =
parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *) NULL) {
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
}
#ifdef UCLINUX
maybe_run_child(&do_child, "d", &msg_q_1);
#endif
setup(); /* global setup */
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
/*
* fork a child to read from the queue while the parent
* enqueues the message to be read.
*/
if ((c_pid = FORK_OR_VFORK()) == -1) {
tst_brkm(TBROK, cleanup, "could not fork");
}
if (c_pid == 0) { /* child */
#ifdef UCLINUX
if (self_exec(av[0], "d", msg_q_1) < 0) {
tst_brkm(TBROK, cleanup, "could not self_exec");
}
#else
do_child();
#endif
} else { /* parent */
/* put the message on the queue */
if (msgsnd(msg_q_1, &snd_buf, MSGSIZE, 0) == -1) {
tst_brkm(TBROK, cleanup, "Couldn't enqueue" " message");
}
/* wait for the child to finish */
wait(&status);
/* make sure the child returned a good exit status */
e_code = status >> 8;
if (e_code != 0) {
tst_resm(TFAIL, "Failures reported above");
}
}
}
cleanup();
/** NOT REACHED **/
return(0);
}
/*
* do_child()
*/
void
do_child()
{
int retval = 0;
TEST(msgrcv(msg_q_1, &rcv_buf, MSGSIZE, 1, 0));
if (TEST_RETURN == -1) {
retval = 1;
tst_resm(TFAIL, "%s call failed - errno = %d : %s",
TCID, TEST_ERRNO, strerror(TEST_ERRNO));
} else {
if (STD_FUNCTIONAL_TEST) {
/*
* Build a new message and compare it
* with the one received.
*/
init_buf(&cmp_buf, MSGTYPE, MSGSIZE);
if (strcmp(rcv_buf.mtext, cmp_buf.mtext) == 0) {
tst_resm(TPASS,
"message received = " "message sent");
} else {
retval = 1;
tst_resm(TFAIL,
"message received != " "message sent");
}
} else {
tst_resm(TPASS, "call succeeded");
}
}
exit(retval);
}
/*
* setup() - performs all the ONE TIME setup for this test.
*/
void setup(void)
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Pause if that option was specified */
TEST_PAUSE;
/*
* Create a temporary directory and cd into it.
* This helps to ensure that a unique msgkey is created.
* See ../lib/libipc.c for more information.
*/
tst_tmpdir();
msgkey = getipckey();
/* create a message queue with read/write permission */
if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW)) == -1) {
tst_brkm(TBROK, cleanup, "Can't create message queue");
}
/* initialize the message buffer */
init_buf(&snd_buf, MSGTYPE, MSGSIZE);
}
/*
* cleanup() - performs all the ONE TIME cleanup for this test at completion
* or premature exit.
*/
void cleanup(void)
{
/* if it exists, remove the message queue that was created */
rm_queue(msg_q_1);
/* Remove the temporary directory */
tst_rmdir();
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* exit with return code appropriate for results */
tst_exit();
}