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 )