man pages section 9F: Kernel Functions for Drivers
    
S
 
 STREAMS message blocks
  concatenate bytes in a message — msgpullup ( Index Term Link )
  concatenate bytes in a message — pullupmsg ( Index Term Link )
  concatenate two — linkb ( Index Term Link )
  copy — copyb ( Index Term Link )
 
 STREAMS message queue, insert a message into a queue — insq ( Index Term Link )
 
 STREAMS messages, copy a message — copymsg ( Index Term Link )
 
 STREAMS queues
  place a message at the head of a queue — putbq ( Index Term Link )
  put a message on a queue — putq ( Index Term Link )
  send a control message to a queue — putctl ( Index Term Link )
  send a control message to a queue — putnextctl ( Index Term Link )
  send a control message with a one-byte parameter to a queue — putctl1 ( Index Term Link )
  send a control message with a one-byte parameter to a queue — putnextctl1 ( Index Term Link )
  send a message to the next queue — putnext ( Index Term Link )