osf1 man page for backq

backq(9r)																 backq(9r)

NAME
       backq - STREAMS: Gets a pointer to the previous queue

SYNOPSIS
       #include <sys/stream.h>

       queue_t * backq(
	       queue_t *current_queue );

ARGUMENTS
       Specifies the pointer to the current queue. The typedef queue_t is an alternate name for struct queue_entry *.

DESCRIPTION
       The  backq  interface  returns  a pointer to the queue preceding the current queue (the current_queue argument).  If the current queue is a
       read queue, backq returns a pointer to the queue downstream from the current queue, unless the current queue is the stream end. If the cur-
       rent  queue  is a write queue, backq returns a pointer to the queue upstream from the current queue, unless the current queue is the stream
       head.

RETURN VALUES
       Upon successful completion, the backq interface returns a pointer to the queue preceding the current queue. Otherwise, it returns NULL.

SEE ALSO
       Programmer's Guide: STREAMS

																	 backq(9r)