On Aug 18 18:43, Linh Phan wrote:
> 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?
Nothing. It's a bug in the DLL and while testing this, I found a
second one. I'll apply the fixes shortly.
Thanks for the testcase!
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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