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LDAP_RESULT(3)                                                                                LDAP_RESULT(3)



NAME
       ldap_result - Wait for the result of an LDAP operation

LIBRARY
       OpenLDAP LDAP (libldap, -lldap)

SYNOPSIS
       #include <ldap.h>

       int ldap_result( LDAP *ld, int msgid, int all,
            struct timeval *timeout, LDAPMessage **result );

       int ldap_msgfree( LDAPMessage *msg );

       int ldap_msgtype( LDAPMessage *msg );

       int ldap_msgid( LDAPMessage *msg );

DESCRIPTION
       The ldap_result() routine is used to wait for and return the result of an operation previously initi-ated initiated
       ated by one  of  the  LDAP  asynchronous  operation  routines  (e.g.,  ldap_search_ext(3),  ldap_mod-ify_ext(3), ldap_modify_ext(3),
       ify_ext(3),  etc.).  Those routines all return -1 in case of error, and an invocation identifier upon
       successful initiation of the operation. The invocation identifier is picked by  the  library  and  is
       guaranteed  to be unique across the LDAP session.  It can be used to request the result of a specific
       operation from ldap_result() through the msgid parameter.

       The ldap_result() routine will block or not, depending upon the setting of the timeout parameter.  If
       timeout is not a NULL pointer,  it  specifies  a  maximum interval  to wait for the selection to com-plete. complete.
       plete.  If timeout is a NULL  pointer, the LDAP_OPT_TIMEOUT value set by ldap_set_option(3) is  used.
       With  the  default  setting,  the   select  blocks  indefinitely.   To effect  a  poll,  the  timeout
       argument should be a non-NULL pointer, pointing to a zero-valued timeval structure.   To  obtain  the
       behavior  of the default setting, bypassing any value set by ldap_set_option(3), set to -1 the tv_sec
       field of the timeout parameter.  See select(2) for further details.

       If the result of a specific operation is required, msgid should be set to the  invocation  identifier
       returned  when  the operation was initiated, otherwise LDAP_RES_ANY or LDAP_RES_UNSOLICITED should be
       supplied to wait for any or unsolicited response.

       The all parameter, if non-zero, causes ldap_result() to return all responses  with  msgid,  otherwise
       only  the  next  response is returned.  This is commonly used to obtain all the responses of a search
       operation.

       A search response is made up of zero or more search entries, zero or more search references, and zero
       or  more  extended partial responses followed by a search result.  If all is set to 0, search entries
       will be returned one at a time as they come in, via separate calls to ldap_result().  If it's set  to
       1,  the  search  response  will only be returned in its entirety, i.e., after all entries, all refer-ences, references,
       ences, all extended partial responses, and the final search result have been received.

RETURN VALUE
       Upon success, the type of the result received is returned and the result parameter will  contain  the
       result  of the operation; otherwise, the result parameter is undefined.  This result should be passed
       to the LDAP parsing routines, ldap_first_message(3) and friends, for interpretation.

       The possible result types returned are:

            LDAP_RES_BIND (0x61)
            LDAP_RES_SEARCH_ENTRY (0x64)
            LDAP_RES_SEARCH_REFERENCE (0x73)
            LDAP_RES_SEARCH_RESULT (0x65)
            LDAP_RES_MODIFY (0x67)
            LDAP_RES_ADD (0x69)
            LDAP_RES_DELETE (0x6b)
            LDAP_RES_MODDN (0x6d)
            LDAP_RES_COMPARE (0x6f)
            LDAP_RES_EXTENDED (0x78)
            LDAP_RES_INTERMEDIATE (0x79)

       The ldap_msgfree() routine is used to free the memory allocated for  result(s)  by  ldap_result()  or
       ldap_search_ext_s(3)  and  friends.  It takes a pointer to the result or result chain to be freed and
       returns the type of the last message in the chain.  If the parameter is NULL, the function does noth-ing nothing
       ing and returns zero.

       The ldap_msgtype() routine returns the type of a message.

       The ldap_msgid() routine returns the message id of a message.

ERRORS
       ldap_result()  returns  -1  if something bad happens, and zero if the timeout specified was exceeded.
       ldap_msgtype() and ldap_msgid() return -1 on error.

SEE ALSO
       ldap(3), ldap_first_message(3), select(2)

ACKNOWLEDGEMENTS
       OpenLDAP Software is developed and maintained by  The  OpenLDAP  Project  <http://www.openldap.org/>.
       OpenLDAP Software is derived from University of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.28                                  2011/11/24                                   LDAP_RESULT(3)