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 oper-
       ation  routines	(e.g.,	ldap_search_ext(3), ldap_modify_ext(3), etc.).
       Those routines all return -1 in case of error, and an invocation	 iden-
       tifier  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	 spec-
       ifies  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	struc-
       ture.   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	opera-
       tion.

       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 interpre-
       tation.

       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 Univer-
       sity of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.40			  2014/09/20			LDAP_RESULT(3)