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cygwin 1.7 message queues can't open more than 1 queue?


Hi,

I downloaded cygwin 1.7 to use message queues but unfortunately, the message queues only allows me to open
1 message queue. If I try to open a second one, it fails with "Permission denied". Below is the test I used:


#include <stdio.h>
#include <mqueue.h>
#include <fcntl.h>
main()
{
 int flags = O_RDWR | O_NONBLOCK | O_CREAT | O_EXCL;
 struct mq_attr attr;
 char queue[33];
 char *e;
 mode_t mode = strtoul("644", &e, 8);
 mqd_t mqd;

 memset((void *) &attr, 0, sizeof(struct mq_attr));
 attr.mq_maxmsg = (long) 10;
 attr.mq_msgsize = (long) 24;

strcpy(queue, "/queue0");
mq_unlink(queue);
mqd = mq_open(queue, flags, mode, &attr);
strcpy(queue, "/queue1");
mq_unlink(queue);
mqd = mq_open(queue, flags, mode, &attr); // ALWAYS FAIL HERE WITH "Permission denied"
perror("mq_open");
}


Does anyone know what I did wrong?

Thank you,

Linh


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