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unlinkb (9)
  • >> unlinkb (9) ( Solaris man: Ядро )
  •  

    NAME

    unlinkb - remove a message block from the head of a message
     
    

    SYNOPSIS

    #include <sys/stream.h>
    
    
    
    mblk_t *unlinkb(mblk_t *mp);
    

     

    INTERFACE LEVEL

    Architecture independent level 1 (DDI/DKI).  

    PARAMETERS

    mp

    Pointer to the message.

     

    DESCRIPTION

    The unlinkb() function removes the first message block from the message pointed to by mp. A new message, minus the removed message block, is returned.  

    RETURN VALUES

    If successful, the unlinkb() function returns a pointer to the message with the first message block removed. If there is only one message block in the message, NULL is returned.  

    CONTEXT

    The unlinkb() function can be called from user, interrupt, or kernel context.  

    EXAMPLES

    Example 1 unlinkb() example

    The routine expects to get passed an M_PROTO T_DATA_IND message. It will remove and free the M_PROTO header and return the remaining M_DATA portion of the message.

    1  mblk_t *
    2  makedata(mp)
    3      mblk_t *mp;
    4  {
    5       mblk_t *nmp;
    6
    7       nmp = unlinkb(mp);
    8       freeb(mp);
    9       return(nmp);
    10 }
    

     

    SEE ALSO

    linkb(9F)

    Writing Device Drivers

    STREAMS Programming Guide


     

    Index

    NAME
    SYNOPSIS
    INTERFACE LEVEL
    PARAMETERS
    DESCRIPTION
    RETURN VALUES
    CONTEXT
    EXAMPLES
    SEE ALSO


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