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87 lines
2.5 KiB
Groff
87 lines
2.5 KiB
Groff
.TH LDAP_FIRST_MESSAGE 3 "RELEASEDATE" "OpenLDAP LDVERSION"
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.\" $OpenLDAP$
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.\" Copyright 1998-2007 The OpenLDAP Foundation All Rights Reserved.
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.SH NAME
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ldap_first_message, ldap_next_message, ldap_count_messages \- Stepping
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through messages in a result chain
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.SH LIBRARY
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OpenLDAP LDAP (libldap, -lldap)
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.SH SYNOPSIS
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.nf
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.ft B
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#include <ldap.h>
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.LP
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.ft B
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int ldap_count_messages( LDAP *ld, LDAPMessage *result )
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.LP
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.ft B
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LDAPMessage *ldap_first_message( LDAP *ld, LDAPMessage *result )
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.LP
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.ft B
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LDAPMessage *ldap_next_message( LDAP *ld, LDAPMessage *message )
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.SH DESCRIPTION
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.LP
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These routines are used to step through the messages in a result chain
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received from
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.BR ldap_result (3) .
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For search operations, the result chain can contain referral, entry
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and result messages. The
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.BR ldap_msgtype (3)
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function can be used to distinguish between the different message types.
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.LP
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The
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.B ldap_first_message()
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routine is used to retrieve the first message in a result chain.
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It takes the \fIresult\fP as returned by a call to
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.BR ldap_result (3) ,
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.BR ldap_search_s (3)
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or
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.BR ldap_search_st (3)
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and returns a pointer to the first message in the result chain.
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.LP
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This pointer should be supplied on a subsequent call to
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.B ldap_next_message()
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to get the next message, the result of which should be
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supplied to the next call to
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.BR ldap_next_message() ,
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etc.
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.B ldap_next_message()
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will return NULL when there are no more messages.
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.LP
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These functions are useful when using routines like
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.BR ldap_parse_result (3)
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that only operate on the first result in the chain.
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.LP
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A count of the number of messages in the result chain can be obtained
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by calling
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.BR ldap_count_messages() .
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It can also be used to count the number of remaining messages in a chain
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if called with a message, entry or reference returned by
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.B ldap_first_message() ,
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.B ldap_next_message() ,
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.BR ldap_first_entry (3) ,
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.BR ldap_next_entry (3) ,
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.BR ldap_first_reference (3) ,
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.BR ldap_next_reference (3) .
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.SH ERRORS
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If an error occurs in
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.B ldap_first_message()
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or
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.BR ldap_next_message() ,
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NULL is returned. If an error occurs in
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.BR ldap_count_messages() ,
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-1 is returned.
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.SH SEE ALSO
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.BR ldap (3),
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.BR ldap_search (3),
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.BR ldap_result (3),
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.BR ldap_parse_result (3),
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.BR ldap_first_entry (3),
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.BR ldap_first_reference (3)
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.SH ACKNOWLEDGEMENTS
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.B OpenLDAP
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is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
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.B OpenLDAP
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is derived from University of Michigan LDAP 3.3 Release.
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