Hi,

I am using a Freescale i.mx35 board. I try to open a mq queue.

I first issue the "mq" command on my board. I see that the directory /dev/mq appears.
Then I execute the code below. The call to mq_open returns error code 89 (ENOSYS)

What did I do wrong?

Note that the same code works for me when run from within a io_net shim driver.

Thanks.


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

#include <mqueue.h>

#define QUEUE_MESSAGE_SIZE 2048

static mqd_t open_queue(char *name)
{
    mqd_t queue;
    struct mq_attr attr;

    printf("OPENING QUEUE %s\n", name);

    memset((void*)&attr, 0, sizeof(struct mq_attr));
    attr.mq_maxmsg  = 128;
    attr.mq_msgsize = QUEUE_MESSAGE_SIZE;

    queue = mq_open(name, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR, &attr);
    if (queue == -1)
        printf("Couldn't open queue error is %s(%d)\n", strerror(errno), errno);

    return queue;
}

int main(int argc, char **argv)
{
    printf("MAIN!!!\n");

    open_queue("/tmpq");

    return 0;
}