Provided by: libldap2-dev_2.4.15-1ubuntu3_i386 bug


       ldap_init, ldap_initialize, ldap_open - Initialize the LDAP library and
       open a connection to an LDAP server


       OpenLDAP LDAP (libldap, -lldap)


       #include <ldap.h>

       LDAP *ldap_open(host, port)
       char *host;
       int port;

       LDAP *ldap_init(host, port)
       char *host;
       int port;

       int ldap_initialize(ldp, uri)
       LDAP **ldp;
       char *uri;

       #include <ldap_pvt.h>

       int ldap_init_fd(fd, proto, uri, ldp)
       ber_socket_t fd;
       int proto;
       char *uri;
       LDAP **ldp;


       ldap_open() opens a connection to an LDAP server and allocates an  LDAP
       structure which is used to identify the connection and to maintain per-
       connection information.  ldap_init() allocates an  LDAP  structure  but
       does  not  open  an initial connection.  ldap_initialize() allocates an
       LDAP structure but does not open an initial connection.  ldap_init_fd()
       allocates  an  LDAP  structure  using  an  existing  connection  on the
       provided socket.  One of these  routines  must  be  called  before  any
       operations are attempted.

       ldap_open()  takes  host,  the  hostname  on  which  the LDAP server is
       running, and port, the port number to which to connect.  If the default
       IANA-assigned port of 389 is desired, LDAP_PORT should be specified for
       port.  The host parameter may contain a blank-separated list  of  hosts
       to  try  to  connect  to,  and  each host may optionally by of the form
       host:port.  If present, the  :port  overrides  the  port  parameter  to
       ldap_open().   Upon successfully making a connection to an LDAP server,
       ldap_open() returns a pointer to an opaque LDAP structure, which should
       be  passed  to  subsequent  calls  to  ldap_bind(), ldap_search(), etc.
       Certain fields in the LDAP structure can be set to indicate size limit,
       time  limit,  and  how  aliases are handled during operations; read and
       write access to those fields must occur by  calling  ldap_get_option(3)
       and ldap_set_option(3) respectively, whenever possible.

       ldap_init()  acts just like ldap_open(), but does not open a connection
       to the LDAP server.  The actual connection open  will  occur  when  the
       first operation is attempted.

       ldap_initialize()  acts  like  ldap_init(),  but  it returns an integer
       indicating either success or the  failure  reason,  and  it  allows  to
       specify details for the connection in the schema portion of the URI.

       At  this  time,  ldap_open() and ldap_init() are deprecated in favor of
       ldap_initialize(), essentially because the latter allows to  specify  a
       schema in the URI and it explicitly returns an error code.

       ldap_init_fd()  allows  an  LDAP  structure  to be initialized using an
       already-opened  connection.  The  proto  parameter  should  be  one  of
       LDAP_PROTO_TCP,  LDAP_PROTO_UDP,  or  LDAP_PROTO_IPC  for  a connection
       using TCP, UDP, or IPC, respectively. The value LDAP_PROTO_EXT may also
       be  specified  if  user-supplied sockbuf handlers are going to be used.
       Note that support for UDP is not implemented unless libldap  was  built
       with  LDAP_CONNECTIONLESS defined.  The uri parameter may optionally be
       provided for informational purposes.

       Note: the first call into the LDAP library also initializes the  global
       options  for  the  library.  As  such  the first call should be single-
       threaded or otherwise protected to insure that only one call is active.
       It  is  recommended that ldap_get_option() or ldap_set_option() be used
       in the program’s main thread before any additional threads are created.
       See ldap_get_option(3).


       If  an  error  occurs, ldap_open() and ldap_init() will return NULL and
       errno   should   be   set   appropriately.     ldap_initialize()    and
       ldap_init_fd()  will  directly  return  the LDAP code associated to the
       error (or LDAP_SUCCESS in case of success); errno should be set as well
       whenever appropriate.


       ldap(3),  ldap_bind(3),  ldap_get_option(3),  ldap_set_option(3), lber-
       sockbuf(3), errno(3)


       OpenLDAP Software is developed and maintained by The  OpenLDAP  Project
       <>.    OpenLDAP   Software   is   derived  from
       University of Michigan LDAP 3.3 Release.