Obtains the access information of the current client to the specified queue q. The access information contains the following data.
typedef struct { int queue; /* sequencer queue */ int client; /* sequencer client */ int used; /* queue is used with this client */ /* per client watermarks */ char reserved[64]; /* for future use */ } snd_seq_queue_client_t;The queue and client fields are filled inside. The used field is non-zero if the queue is accessible from this client. Note that this flag must be set for accepting any events from the client. When a queue is allocated via snd_seq_alloc_queue or snd_seq_alloc_named_queue, the access flag is set automatically.
Function returns zero if successful, or a negative error code.