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LDAP_GET_DN(3)									   LDAP_GET_DN(3)

       ldap_get_dn, ldap_explode_dn, ldap_explode_rdn, ldap_dn2ufn - LDAP DN handling routines

       #include <ldap.h>

       char *ldap_get_dn(ld, entry)
       LDAP *ld;
       LDAPMessage *entry;

       char **ldap_explode_dn(dn, notypes)
       char *dn;
       int notypes;

       char **ldap_explode_rdn(rdn, notypes)
       char *rdn;
       int notypes;

       char *ldap_dn2ufn(dn)
       char *dn;

       These  routines	allow  LDAP  entry  names  (Distinguished  Names, or DNs) to be obtained,
       parsed, converted to a user-friendly form, and tested.  A DN has the form described in RFC
       2253  "Lightweight  Directory Access Protocol (v3): UTF-8 String Representation of Distin-
       guished Names".

       The  ldap_get_dn()  routine  takes  an  entry  as  returned  by	 ldap_first_entry(3)   or
       ldap_next_entry(3)  and	returns  a  copy  of  the  entry's  DN.  Space for the DN will be
       obtained dynamically and should be freed by the caller using ldap_memfree(3).

       The ldap_explode_dn() routine takes a DN as returned by ldap_get_dn()  and  breaks  it  up
       into  its  component  parts.  Each part is known as a Relative Distinguished Name, or RDN.
       ldap_explode_dn() returns a NULL-terminated array, each component of which contains an RDN
       from  the  DN.	The  notypes  parameter  is  used  to request that only the RDN values be
       returned, not their types.  For example, the DN "cn=Bob, c=US" would return  as	either	{
       "cn=Bob",  "c=US",  NULL } or { "Bob", "US", NULL }, depending on whether notypes was 0 or
       1, respectively.  The result can be freed by calling ldap_value_free(3).

       Similarly,   the   ldap_explode_rdn()   routine	 takes	 an   RDN    as    returned    by
       ldap_explode_dn(dn,0)  and  breaks  it  up  into its "type=value" component parts (or just
       "value", if  the  notypes  parameter  is  set).	 The  result  can  be  freed  by  calling

       ldap_dn2ufn()  is used to turn a DN as returned by ldap_get_dn() into a more user-friendly
       form, stripping off type names.	See  RFC  1781	"Using	the  Directory	to  Achieve  User
       Friendly  Naming"  for  more details on the UFN format.	The space for the UFN returned is
       obtained dynamically and the user is responsible for freeing it via a  call  to	ldap_mem-

       If  an  error  occurs  in ldap_get_dn(), NULL is returned and the ld_errno field in the ld
       parameter is set to indicate the error.	See ldap_error(3) for a description  of  possible
       error  codes.   ldap_explode_dn(),  ldap_explode_rdn(), and ldap_dn2ufn() will return NULL
       with errno(3) set appropriately in case of trouble.

       These routines dyanamically allocate memory that the caller must free.

       ldap(3), ldap_error(3), ldap_first_entry(3), ldap_memfree(3), ldap_value_free(3)

       OpenLDAP is developed and maintained by The OpenLDAP  Project  (http://www.openldap.org/).
       OpenLDAP is derived from University of Michigan LDAP 3.3 Release.

OpenLDAP 2.0.27-Release 		   21 July 2000 			   LDAP_GET_DN(3)
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