mq_open Hanging

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mq_close

mq_close(3C)						   Standard C Library Functions 					      mq_close(3C)

NAME

       mq_close - close a message queue

SYNOPSIS

       #include <mqueue.h>

       int mq_close(mqd_t mqdes);

DESCRIPTION

       The  mq_close()	function  removes the association between the message queue descriptor, mqdes, and its message queue. The results of using
       this message queue descriptor after successful return from this mq_close(), and until the return of this message queue  descriptor  from  a
       subsequent mq_open(3C), are undefined.

       If the process (or thread) has successfully attached a notification request to the message queue via this mqdes, this attachment is removed
       and the message queue is available for another process to attach for notification.

RETURN VALUES

       Upon successful completion, mq_close() returns 0; otherwise, the function returns -1 and sets errno to indicate the error condition.

ERRORS

       The  mq_close() function will fail if:

       EBADF	  The mqdes argument is an invalid message queue descriptor.

       ENOSYS	  The mq_open() function is not supported by the system.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+
       |Standard		     |See standards(5). 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mqueue.h(3HEAD), mq_notify(3C), mq_open(3C), mq_unlink(3C), attributes(5), standards(5)

NOTES

       Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned
       -1 and set errno to ENOSYS.

SunOS 5.11							    5 Feb 2008							      mq_close(3C)

Programming