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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
  current_queue
      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 current 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

Index for Section 9r

Alphabetical listing for B

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