POSIX message queues

I want to create am message queue using POSIX mq_open(), unfortunately no message queue is created and mq_open() only returns -1.

Any ideas how i could get more information why mq_open() failed or how i could debug it further?


#include <mqueue.h>
...
#define MAX_MSG   100
#define OVER      (-1)
#define PMODE     0666
#define QUEUENAME "/myipc"
#define QUEUESIZE 10
...
mqd_t id;
struct mq_attr attr;
attr.mq_maxmsg = QUEUESIZE;
attr.mq_msgsize = sizeof (int);
attr.mq_flags = 0;

id = mq_open (QUEUENAME, O_RDWR, PMODE, &attr);

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