mq_unlink - remove a message queue
mq_unlink() removes the specified message queue
name. The message queue name is removed immediately. The queue
itself is destroyed once any other processes that have the queue open
close their descriptors referring to the queue.
On success mq_unlink() returns 0; on error, -1 is
errno set to indicate the error.
The caller does not have permission to unlink this message queue.
name was too long.
There is no message queue with the given
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