LDAP_FIRST_MESSAGE(3)LDAP_FIRST_MESSAGE(3)NAME
ldap_first_message, ldap_next_message, ldap_count_messages
- Stepping through messages in a result chain
LIBRARY
OpenLDAP LDAP (libldap, -lldap)
SYNOPSIS
#include <ldap.h>
int ldap_count_messages( LDAP *ld, LDAPMessage *result )
LDAPMessage *ldap_first_message( LDAP *ld, LDAPMessage *result )
LDAPMessage *ldap_next_message( LDAP *ld, LDAPMessage *message )
DESCRIPTION
These routines are used to step through the messages in a
result chain received from ldap_result(3). For search
operations, the result chain can contain referral, entry
and result messages. The ldap_msgtype(3) function can be
used to distinguish between the different message types.
The ldap_first_message() routine is used to retrieve the
first message in a result chain. It takes the result as
returned by a call to ldap_result(3), ldap_search_s(3) or
ldap_search_st(3) and returns a pointer to the first mes-
sage in the result chain.
This pointer should be supplied on a subsequent call to
ldap_next_message() to get the next message, the result of
which should be supplied to the next call to
ldap_next_message(), etc. ldap_next_message() will return
NULL when there are no more messages.
These functions are useful when using routines like
ldap_parse_result(3) that only operate on the first result
in the chain.
A count of the number of messages in the result chain can
be obtained by calling ldap_count_messages(). It can also
be used to count the number of remaining messages in a
chain if called with a message, entry or reference
returned by ldap_first_message() , ldap_next_message() ,
ldap_first_entry(3), ldap_next_entry(3), ldap_first_refer-
ence(3), ldap_next_reference(3).
ERRORS
If an error occurs in ldap_first_message() or
ldap_next_message(), NULL is returned. If an error occurs
in ldap_count_messages(), -1 is returned.
SEE ALSOldap(3), ldap_search(3), ldap_result(3),
ldap_parse_result(3), ldap_first_entry(3), ldap_first_ref-
erence(3)ACKNOWLEDGEMENTS
OpenLDAP is developed and maintained by The OpenLDAP Pro-
ject (http://www.openldap.org/). OpenLDAP is derived from
University of Michigan LDAP 3.3 Release.
OpenLDAP LDVERSION RELEASEDATE LDAP_FIRST_MESSAGE(3)
