Simple program to test creating a message queue with all permissions set

mq_open_test.c

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>           /* For O_* constants */
#include <sys/stat.h>        /* For mode constants */
#include <mqueue.h>

#define QUEUE_NAME	"/my-mqueue"
#define QUEUE_SIZE	128
#define QUEUE_MSG_SIZE	64

int main(int argc, char **argv)
{
	mqd_t my_mqueue;

	struct mq_attr attr;
	attr.mq_flags = 0;
	attr.mq_maxmsg = QUEUE_SIZE;
	attr.mq_msgsize = QUEUE_MSG_SIZE;
	attr.mq_curmsgs = 0;

	my_mqueue = mq_open(QUEUE_NAME,  O_RDWR | O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO, &attr);
	if (my_mqueue == -1) {
		perror("mq_open");
		exit(-1);
	}

	if (mq_unlink(QUEUE_NAME) != 0) {
		perror("mq_unlink");
		exit(-1);
	}
	
	return 0;
}