Updated: 2022/Sep/29

Please read Privacy Policy. It's for your privacy.

LDAP_RESULT(3)             Library Functions Manual             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 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 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 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
       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 references, 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 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
       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 the
       University of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.50                   2020/04/28                    LDAP_RESULT(3)