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LDAP(3) 										  LDAP(3)

       ldap - OpenLDAP Lightweight Directory Access Protocol API

       OpenLDAP LDAP (libldap, -lldap)

       #include <ldap.h>

       The  Lightweight  Directory  Access  Protocol provides access to X.500 directory services.
       The services may be stand-alone or part of a distributed directory service.  This API sup-
       ports  LDAP  over  TCP  (RFC2251), LDAP over SSL, and LDAP over IPC (UNIX domain sockets).
       This API supports SASL (RFC2829) and Start TLS (RFC2830).  This API is based upon  IETF	C
       LDAP API draft specification, a work in progress.

       The  OpenLDAP  Software	package  includes  a stand-alone server in slapd(8), various LDAP
       clients, and an LDAP client library used to provide programmatic access to the LDAP proto-
       col. This man page gives an overview of the LDAP library routines.

       Both  synchronous  and asynchronous APIs are provided.  Also included are various routines
       to parse the results returned from these routines.  These routines are found in the -lldap

       The  basic  interaction	is as follows.	A session handle is created using ldap_init(3) or
       ldap_initialize(3).  (The ldap_initialize(3) routine is preferred, but is not part of  the
       draft  specification.)  The underlying session is established upon first use which is com-
       monly  an  LDAP	bind  operation.   The	LDAP  bind  operation  is  performed  by  calling
       ldap_sasl_bind(3)  or one of its friends.  Next, other operations are performed by calling
       one  of	the  synchronous  or  asynchronous  routines   (e.g.,	ldap_search_ext_s(3)   or
       ldap_search_ext(3)  followed by ldap_result(3)).  Results returned from these routines are
       interpreted by calling the LDAP parsing routines such as ldap_parse_result(3).	The  LDAP
       association and underlying connection is terminated by calling ldap_unbind_ext(3).  Errors
       can be interpreted by calling ldap_err2string(3).

       Search filters to be passed to the ldap search routines are to be constructed by hand  and
       should conform to RFC 2254.

       Results	obtained  from	the  ldap  search  routines  can  be  output  by hand, by calling
       ldap_first_entry(3)  and  ldap_next_entry(3)  to  step  through	the   entries	returned,
       ldap_first_attribute(3)	and ldap_next_attribute(3) to step through an entry's attributes,
       and ldap_get_values(3) to retrieve a given attribute's values.  Attribute  values  may  or
       may not be displayable.

       This  library  supports	both  LDAP  Version  2 and Version 3, with the Version 2 protocol
       selected by default.  LDAP Version 3 operations can be extended through the  use  of  con-
       trols.  Controls  can be sent to a server or returned to the client with any LDAP message.
       Extended versions of the standard routines are available for use with controls. These rou-
       tines are generally named by adding _ext to the regular routine's name.

       The  ldap_url(3)  routines can be used to test a URL to see if it is an LDAP URL, to parse
       LDAP URLs into their component pieces, and to initiate searches	directly  using  an  LDAP

       Also  provided  are  various utility routines.  The ldap_sort(3) routines are used to sort
       the entries and values returned via the ldap search routines.

       Also included in the distribution is a set of lightweight Basic Encoding  Rules	routines.
       These  routines	are  used by the LDAP library routines to encode and decode LDAP protocol
       elements using the (slightly simplified) Basic Encoding Rules defined by LDAP.	They  are
       not  normally  used directly by an LDAP application program except in the handling of con-
       trols and extended operations.  The routines provide a printf and scanf-like interface, as
       well   as   lower-level	 access.    These   routines  are  discussed  in  lber-decode(3),
       lber-encode(3), lber-memory(3), and lber-types(3).

       ldap_open(3)	   open a connection to an LDAP server (deprecated, use ldap_init(3))

       ldap_init(3)	   initialize the LDAP library without opening a connection to a server

       ldap_initialize(3)  initialize the LDAP library without opening a connection to a server

       ldap_result(3)	   wait for the result from an asynchronous operation

       ldap_abandon(3)	   abandon (abort) an asynchronous operation

       ldap_add(3)	   asynchronously add an entry

       ldap_add_s(3)	   synchronously add an entry

       ldap_bind(3)	   asynchronously bind to the directory

       ldap_bind_s(3)	   synchronously bind to the directory

       ldap_simple_bind(3) asynchronously bind to the directory using simple authentication

			   synchronously bind to the directory using simple authentication

       ldap_unbind(3)	   synchronously unbind from the LDAP server and close the connection

       ldap_unbind_s(3)    equivalent to ldap_unbind(3)

       ldap_memfree (3)    dispose of memory allocated by LDAP routines.

       ldap_compare(3)	   asynchronously compare to a directory entry

       ldap_compare_s(3)   synchronously compare to a directory entry

       ldap_delete(3)	   asynchronously delete an entry

       ldap_delete_s(3)    synchronously delete an entry

       ldap_perror(3)	   print an LDAP error indication to standard error

       ld_errno(3)	   LDAP error indication

			   extract LDAP error indication from LDAP result

       ldap_errlist(3)	   list of LDAP errors and their meanings

       ldap_err2string(3)  convert LDAP error indication to a string

			   return first attribute name in an entry

			   return next attribute name in an entry

       ldap_first_entry(3) return first entry in a chain of search results

       ldap_next_entry(3)  return next entry in a chain of search results

			   return number of entries in a search result

       ldap_get_dn(3)	   extract the DN from an entry

       ldap_explode_dn(3)  convert a DN into its component parts

       ldap_explode_rdn(3) convert an RDN into its component parts

       ldap_get_values(3)  return an attribute's values

			   return an attribute's values with lengths

       ldap_value_free(3)  free memory allocated by ldap_get_values(3)

			   free memory allocated by ldap_get_values_len(3)

			   return number of values

			   return number of values

       ldap_modify(3)	   asynchronously modify an entry

       ldap_modify_s(3)    synchronously modify an entry

       ldap_mods_free(3)   free array of pointers to mod structures used by ldap_modify(3)

       ldap_modrdn2(3)	   asynchronously modify the RDN of an entry

       ldap_modrdn2_s(3)   synchronously modify the RDN of an entry

       ldap_modrdn(3)	   deprecated - use ldap_modrdn2(3)

       ldap_modrdn_s(3)    depreciated - use ldap_modrdn2_s(3)

       ldap_msgfree(3)	   free results allocated by ldap_result(3)

       ldap_msgtype(3)	   return the message type of a message from ldap_result(3)

       ldap_msgid(3)	   return the message id of a message from ldap_result(3)

       ldap_search(3)	   asynchronously search the directory

       ldap_search_s(3)    synchronously search the directory

       ldap_search_st(3)   synchronously search the directory with timeout

       ldap_is_ldap_url(3) check a URL string to see if it is an LDAP URL

       ldap_url_parse(3)   break up an LDAP URL string into its components

			   sort a list of search results

       ldap_sort_values(3) sort a list of attribute values

			   case insensitive string comparison

       ldap.conf(5), slapd(8), draft-ietf-ldapext-ldap-c-api-xx.txt <http://www.ietf.org>

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

       These  API manual pages are based upon descriptions provided in the IETF C LDAP API Inter-
       net Draft, a work in progress, edited by Mark Smith.

OpenLDAP 2.1.X				   RELEASEDATE					  LDAP(3)
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