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mq_getattr(2)							 mq_getattr(2)

NAME
       mq_getattr  -  get  status information and attributes associated with a
       message queue

SYNOPSIS
DESCRIPTION
       The system call collects status information and	attributes  associated
       with  the  message  queue  specified  by mqdes which is copied into the
       structure referenced by mqstat.

       Upon a successful return, the mq_msgsize and  mq_maxmsg	fields	within
       the  mq_attr  structure	contain the maximum size of a message for this
       queue and the maximum number of messages that  can  be  queued  at  any
       time. The mq_curmsgs field contains the number of messages currently on
       the queue. In addition, the mq_flags field contains the	message	 queue
       blocking status associated with this mqdes.

       To use this function, link in the realtime library by specifying on the
       compiler or linker command line.

RETURN VALUE
       returns the following values:

	      Successful completion.

	      Failure.
		   is set to indicate the error.

ERRORS
       If fails, is set to one of the following values:

	      [EBADF]	     mqdes is not a valid message queue descriptor.

	      [EINVAL]	     mqstat does not point to a valid  mq_attr	struc‐
			     ture.

	      [ENOSYS]	     is not supported by the implementation.

SEE ALSO
       mq_open(2), mq_setattr(2).

STANDARDS CONFORMANCE
								 mq_getattr(2)

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