text: /*
   * Copyright (c) 2002, Intel Corporation. All rights reserved.
   * Created by:  julie.n.fleischer REMOVE-THIS AT intel DOT com
   * This file is licensed under the GPL license.  For the full content
   * of this license, see the COPYING file at the top level of this
   * source tree.
   */
  
  /*
   * Test that if O_NONBLOCK is set and the message queue is full, mq_send()
   * will just return an error message and the message will not be queued.
   *
   * Test by sending messages with increasing priority number until a failure
   * is received.  Then test that the message just sent (highest priority) is
   * not the one received.
   *
   * 3/13/03 - Added fix from Gregoire Pichon for specifying an attr
   *           with a mq_maxmsg >= BUFFER.
   *
   */
  
  #include <stdio.h>
  #include <limits.h>
  #include <mqueue.h>
  #include <fcntl.h>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <unistd.h>
  #include <string.h>
  #include <stdint.h>
  #include <errno.h>
  #include "posixtest.h"
  
  #define NAMESIZE 50
  #define MESSAGESIZE 50
  #define MSGSTR "0123456789"
  #define BUFFER 40
  #define MAXMSG 10		// send should end after MAXMSG
  
  int main(void)
  {
  	char qname[NAMESIZE], msgrcd[BUFFER];
  	char msgptr[MESSAGESIZE];
  	mqd_t queue;
  	struct mq_attr attr;
  	int unresolved = 0, failure = 0, spri = 1, i, maxreached = 0;
  	unsigned pri;
  
  	sprintf(qname, "/mq_send_7-1_%d", getpid());
  
  	attr.mq_msgsize = BUFFER;
  	attr.mq_maxmsg = MAXMSG;
  	queue = mq_open(qname, O_CREAT | O_RDWR | O_NONBLOCK,
  			S_IRUSR | S_IWUSR, &attr);
  	if (queue == (mqd_t) - 1) {
  		perror("mq_open() did not return success");
  		return PTS_UNRESOLVED;
  	}
  
  	for (i = 0; i < MQ_PRIO_MAX; i++) {	// assuming MAXMSG < MQ_PRIO_MAX
  		sprintf(msgptr, "message %d", i);
  		if (mq_send(queue, msgptr, strlen(msgptr), spri++) == -1) {
  			maxreached = 1;
  			if (errno != EAGAIN) {
  				printf("mq_send() did not fail on EAGAIN\n");
  				failure = 1;
  			}
  			break;
  		}
  	}
  
  	if (mq_receive(queue, msgrcd, BUFFER, &pri) == -1) {
  		perror("mq_receive() returned failure");
  		unresolved = 1;
  	} else {
  		if ((strcmp(msgptr, msgrcd) == 0) && (maxreached != 0)) {
  			printf("Error: Received message that caused EAGAIN\n");
  			failure = 1;
  		}
  	}
  
  	if (mq_close(queue) != 0) {
  		perror("mq_close() did not return success");
  		unresolved = 1;
  	}
  
  	if (mq_unlink(qname) != 0) {
  		perror("mq_unlink() did not return success");
  		unresolved = 1;
  	}
  
  	if (maxreached == 0) {
  		printf("Test inconclusive:  Couldn't fill message queue\n");
  		return PTS_UNRESOLVED;
  	}
  	if (failure == 1) {
  		printf("Test FAILED\n");
  		return PTS_FAIL;
  	}
  
  	if (unresolved == 1) {
  		printf("Test UNRESOLVED\n");
  		return PTS_UNRESOLVED;
  	}
  
  	printf("Test PASSED\n");
  	return PTS_PASS;
  }
  