ldap_result(3) — Linux manual page


LDAP_RESULT(3)            Library Functions Manual            LDAP_RESULT(3)

NAME         top

       ldap_result - Wait for the result of an LDAP operation

LIBRARY         top

       OpenLDAP LDAP (libldap, -lldap)

SYNOPSIS         top

       #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         top

       The ldap_result() routine is used to wait for and return the result
       of an operation previously initiated by one of the LDAP asynchronous
       operation routines (e.g., ldap_search_ext(3), ldap_modify_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

       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
       complete.  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

       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 references,
       all extended partial responses, and the final search result have been

RETURN VALUE         top

       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

       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 nothing 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         top

       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         top

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


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

COLOPHON         top

       This page is part of the OpenLDAP (an open source implementation of
       the Lightweight Directory Access Protocol) project.  Information
       about the project can be found at ⟨http://www.openldap.org/⟩.  If you
       have a bug report for this manual page, see
       ⟨http://www.openldap.org/its/⟩.  This page was obtained from the
       project's upstream Git repository
       ⟨https://git.openldap.org/openldap/openldap.git⟩ on 2020-11-01.  (At
       that time, the date of the most recent commit that was found in the
       repository was 2020-10-30.)  If you discover any rendering problems
       in this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or im‐
       provements to the information in this COLOPHON (which is not part of
       the original manual page), send a mail to man-pages@man7.org

OpenLDAP LDVERSION               RELEASEDATE                  LDAP_RESULT(3)

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