freebsd stable - Sep 2014 - mq_open sets errno to 78 when queue does not exist

Hi,

I have a very simple program. It basically tries to open a message
queue which does not exists. mq_open returns then -1 but errno is set
to 78 which is defined as this: 

#define	ENOSYS 78 /* Function not implemented */

The line in question:

res = mq_open ("/doesnotexist", O_RDWR);

"/doesnotexists" is the non-existing message queue the program tests
for. res will be set correctly to -1 but errno is set then to 78.

If I want to create the message queue, I will get the same error.

uname -a says:

FreeBSD X220.alogt.com 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #45
r271420: Sat Sep 13 15:09:34 WITA 2014
erich at X220.alogt.com:/usr/obj/usr/src/sys/X220  amd64

Do I see or do something wrong or is this an error?

Erich

On Mon, Sep 15, 2014 at 02:59:12PM +0800, Erich Dollansky
wrote:
> Hi,
> 
> I have a very simple program. It basically tries to open a message
> queue which does not exists. mq_open returns then -1 but errno is set
> to 78 which is defined as this: 
> 
> #define	ENOSYS 78 /* Function not implemented */
> 
> The line in question:
> 
> res = mq_open ("/doesnotexist", O_RDWR);
> 
> "/doesnotexists" is the non-existing message queue the program
tests
> for. res will be set correctly to -1 but errno is set then to 78.
> 
> If I want to create the message queue, I will get the same error.
> 
> uname -a says:
> 
> FreeBSD X220.alogt.com 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #45
> r271420: Sat Sep 13 15:09:34 WITA 2014
> erich at X220.alogt.com:/usr/obj/usr/src/sys/X220  amd64
> 
> Do I see or do something wrong or is this an error?
> 
Do you have mqueuefs loaded?

-- 
Mateusz Guzik <mjguzik gmail.com>