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Viewing File: ldap_count_values_len.3

.lf 1 stdin
.TH LDAP_GET_VALUES 3 "2021/06/03" "OpenLDAP 2.4.59"
.\" $OpenLDAP$
.\" Copyright 1998-2021 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
.SH NAME
ldap_get_values, ldap_get_values_len, ldap_count_values \- LDAP attribute value handling routines
.SH LIBRARY
OpenLDAP LDAP (libldap, \-lldap)
.SH SYNOPSIS
.nf
.ft B
#include <ldap.h>

.LP
.ft B
char **ldap_get_values(ld, entry, attr)
.ft
LDAP *ld;
LDAPMessage *entry;
char *attr;
.LP
.ft B
struct berval **ldap_get_values_len(ld, entry, attr)
.ft
LDAP *ld;
LDAPMessage *entry;
char *attr;
.LP
.ft B
int ldap_count_values(vals)
.ft
char **vals;
.LP
.ft B
int ldap_count_values_len(vals)
.ft
struct berval **vals;
.LP
.ft B
void ldap_value_free(vals)
.ft
char **vals;
.LP
.ft B
void ldap_value_free_len(vals)
.ft
struct berval **vals;
.SH DESCRIPTION
These routines are used to retrieve and manipulate attribute values
from an LDAP entry as returned by
.BR ldap_first_entry (3)
or
.BR ldap_next_entry (3).
.B ldap_get_values()
takes the \fIentry\fP and the attribute \fIattr\fP
whose values are desired and returns a NULL-terminated array of the
attribute's values.  \fIattr\fP may be an attribute type as returned
from
.BR ldap_first_attribute (3)
or
.BR ldap_next_attribute (3),
or if the attribute type is known it can simply be given.
.LP
The number of values in the array can be counted by calling
.BR ldap_count_values() .
The array of values returned can be freed by calling
.BR ldap_value_free() .
.LP
If the attribute values are binary in nature, and thus not suitable
to be returned as an array of char *'s, the
.B ldap_get_values_len()
routine can be used instead.  It takes the same parameters as
.BR ldap_get_values() ,
but returns a NULL-terminated array of pointers
to berval structures, each containing the length of and a pointer
to a value.
.LP
The number of values in the array can be counted by calling
.BR ldap_count_values_len() .
The array of values returned can be freed by calling
.BR ldap_value_free_len() .
.SH ERRORS
If an error occurs in
.B ldap_get_values()
or
.BR ldap_get_values_len() ,
NULL is returned and the
.B ld_errno
field in the \fIld\fP parameter is set to
indicate the error.  See
.BR ldap_error (3)
for a description of possible error codes.
.SH NOTES
These routines dynamically allocate memory which the caller must free
using the supplied routines.
.SH SEE ALSO
.BR ldap (3),
.BR ldap_first_entry (3),
.BR ldap_first_attribute (3),
.BR ldap_error (3)
.SH ACKNOWLEDGEMENTS
.lf 1 ./../Project
.\" Shared Project Acknowledgement Text
.B "OpenLDAP Software"
is developed and maintained by The OpenLDAP Project <http://www.openldap.org/>.
.B "OpenLDAP Software"
is derived from the University of Michigan LDAP 3.3 Release.  
.lf 103 stdin