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fn_attribute_create (3)
  • >> fn_attribute_create (3) ( Solaris man: Библиотечные вызовы )
  • 
    NAME
         FN_attribute_t,  fn_attribute_create,  fn_attribute_destroy,
         fn_attribute_copy,                      fn_attribute_assign,
         fn_attribute_identifier,                fn_attribute_syntax,
         fn_attribute_valuecount,                 fn_attribute_first,
         fn_attribute_next, fn_attribute_add,  fn_attribute_remove  -
         an XFN attribute
    
    SYNOPSIS
         cc [ flag ... ] file ... -lxfn [ library ... ]
         #include <xfn/xfn.h>
    
         FN_attribute_t     *fn_attribute_create(constFN_identifier_t
         *attribute_id, const FN_identifier_t *attribute_syntax);
    
         void fn_attribute_destroy(FN_attribute_t *attr);
    
         FN_attribute_t        *fn_attribute_copy(constFN_attribute_t
         *attr);
    
         FN_attribute_t   *fn_attribute_assign(FN_attribute_t   *dst,
         const FN_attribute_t *src);
    
         const                                        FN_identifier_t
         *fn_attribute_identifier(constFN_attribute_t *attr);
    
         const                                        FN_identifier_t
         *fn_attribute_syntax(constFN_attribute_t *attr);
    
         unsigned   int   fn_attribute_valuecount(constFN_attribute_t
         *attr);
    
         const FN_attrvalue_t *fn_attribute_first(constFN_attribute_t
         *attr, void **iter_pos);
    
         const FN_attrvalue_t  *fn_attribute_next(constFN_attribute_t
         *attr, void **iter_pos);
    
         int     fn_attribute_add(FN_attribute_t     *attr,     const
         FN_attrvalue_t *attribute_value, unsigned int exclusive);
    
         int    fn_attribute_remove(FN_attribute_t    *attr,    const
         FN_attrvalue_t *attribute_value);
    
    DESCRIPTION
         An attribute has an attribute identifier, a  syntax,  and  a
         set  of distinct values. Each value is a sequence of octets.
         The   operations   associated   with   objects    of    type
         FN_attribute_t  allow  the  construction,  destruction,  and
         manipulation of an attribute and its value set.
    
    
         The attribute identifier and its syntax are specified  using
         an  FN_identifier_t.  fn_attribute_create()  creates  a  new
         attribute object with the given identifier and  syntax,  and
         an  empty set of values. fn_attribute_destroy() releases the
         storage associated with attr. fn_attribute_copy() returns  a
         copy of the object pointed to by attr. fn_attribute_assign()
         makes a copy of the attribute object pointed to by  src  and
         assigns  it  to  dst,  releasing  any old contents of dst. A
         pointer to the same object as dst is returned.
    
         fn_attribute_identifier() returns the  attribute  identifier
         of  attr. fn_attribute_syntax() returns the attribute syntax
         of attr. fn_attribute_valuecount()  returns  the  number  of
         attribute values in attr.
    
         fn_attribute_first() and  fn_attribute_next()  are  used  to
         enumerate  the  values  of  an attribute. Enumeration of the
         values of an attribute may return the values in  any  order.
         fn_attribute_first()  returns  an  attribute value from attr
         and sets the iteration marker iter_pos. Subsequent calls  to
         fn_attribute_next() returns the next attribute value identi-
         fied by iter_pos and advances iter_pos. Adding  or  removing
         values  from  an attribute invalidates any iteration markers
         that the caller holds.
    
         fn_attribute_add() adds a new value attribute_value to attr.
         The   operation   succeeds   (but  no  change  is  made)  if
         attribute_value is already in attr and exclusive is  0;  the
         operation  fails  if  attribute_value is already in attr and
         exclusive is non-zero.
    
         fn_attribute_remove() removes attribute_value from attr. The
         operation  succeeds  even if attribute_value is not  amongst
         attr's values.
    
    RETURN VALUES
         fn_attribute_first() returns 0 if the attribute contains  no
         values.  fn_attribute_next()  returns 0 if there are no more
         values to be returned in the attribute (as identified by the
         iteration marker)  or if the iteration marker is invalid.
    
         fn_attribute_add() and fn_attribute_remove() return 1 if the
         operation succeeds, 0 if it fails.
    
    USAGE
         Manipulation of attributes using the operations described in
         this manual page does not affect their representation in the
         underlying naming  system.  Changes  to  attributes  in  the
         underlying  naming  system  can only be effected through the
         use of the interfaces described in xfn_attributes(3XFN).
    
    
    ATTRIBUTES
         See attributes(5) for descriptions of the  following  attri-
         butes:
    
         ____________________________________________________________
        |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
        |_____________________________|_____________________________|
        | MT-Level                    | MT-Safe                     |
        |_____________________________|_____________________________|
    
    
    SEE ALSO
         FN_attrset_t(3XFN),                    FN_attrvalue_t(3XFN),
         FN_identifier_t(3XFN),                    fn_attr_get(3XFN),
         fn_attr_modify(3XFN),    xfn(3XFN),    xfn_attributes(3XFN),
         attributes(5)
    
    NOTES
         The implementation of XFN in this Solaris release  is  based
         on  the  X/Open preliminary specification. It is likely that
         there will be minor changes to these interfaces  to  reflect
         changes in the final version of this specification. The next
         minor release of Solaris will offer binary compatibility for
         applications  developed using the current interfaces. As the
         interfaces evolve toward  standardization,  it  is  possible
         that  future  releases  of Solaris will require minor source
         code  changes  to  applications  that  have  been  developed
         against the preliminary specification.
    
    
    
    


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