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.lf 1 stdin
.TH LDAP_SEARCH 3 "2018/03/22" "OpenLDAP 2.4.46"
.\" $OpenLDAP$
.\" Copyright 1998-2018 The OpenLDAP Foundation All Rights Reserved.
.\" Copying restrictions apply.  See COPYRIGHT/LICENSE.
.SH NAME
ldap_search, ldap_search_s, ldap_search_st, ldap_search_ext, ldap_search_ext_s \- Perform an LDAP search operation
.SH LIBRARY
OpenLDAP LDAP (libldap, \-lldap)
.SH SYNOPSIS
.nf
.ft B
#include <sys/types.h>
#include <ldap.h>
.LP
.ft B
int ldap_search_ext(
.RS
LDAP *\fIld\fB,
char *\fIbase\fB,
int \fIscope\fB,
char *\fIfilter\fB,
char *\fIattrs\fB[],
int \fIattrsonly\fB,
LDAPControl **\fIserverctrls\fB,
LDAPControl **\fIclientctrls\fB,
struct timeval *\fItimeout\fB,
int \fIsizelimit\fB,
int *\fImsgidp\fB );
.RE
.LP
.ft B
int ldap_search_ext_s(
.RS
LDAP *\fIld\fB,
char *\fIbase\fB,
int \fIscope\fB,
char *\fIfilter\fB,
char *\fIattrs\fB[],
int \fIattrsonly\fB,
LDAPControl **\fIserverctrls\fB,
LDAPControl **\fIclientctrls\fB,
struct timeval *\fItimeout\fB,
int \fIsizelimit\fB,
LDAPMessage **\fIres\fB );
.RE
.SH DESCRIPTION
These routines are used to perform LDAP search operations.
The
.B ldap_search_ext_s()
routine
does the search synchronously (i.e., not
returning until the operation completes), providing a pointer
to the resulting LDAP messages at the location pointed to by
the \fIres\fP parameter.
.LP
The
.B ldap_search_ext()
routine is the asynchronous version, initiating the search and returning
the message id of the operation it initiated in the integer
pointed to by the \fImsgidp\fP parameter.
.LP
The \fIbase\fP parameter is the DN of the entry at which to start the search.
.LP
The \fIscope\fP parameter is the scope of the search and should be one
of LDAP_SCOPE_BASE, to search the object itself, LDAP_SCOPE_ONELEVEL,
to search the object's immediate children, LDAP_SCOPE_SUBTREE, to
search the object and all its descendants, or LDAP_SCOPE_CHILDREN,
to search all of the descendants.   Note that the latter requires
the server support the LDAP Subordinates Search Scope extension.
.LP
The \fIfilter\fP is a string representation of the filter to
apply in the search.  The string should conform to the format
specified in RFC 4515 as extended by RFC 4526.  For instance,
"(cn=Jane Doe)".  Note that use of the extension requires the
server to support the LDAP Absolute True/False Filter extension.
NULL may be specified to indicate the library should send the
filter (objectClass=*).
.LP
The \fIattrs\fP parameter is a null-terminated array of attribute
descriptions to return from matching entries.
If NULL is specified, the return of all user attributes is requested.
The description "*" (LDAP_ALL_USER_ATTRIBUTES) may be used to request
all user attributes to be returned.
The description "+"(LDAP_ALL_OPERATIONAL_ATTRIBUTES) may be used to
request all operational attributes to be returned.  Note that this
requires the server to support the LDAP All Operational Attribute
extension.
To request no attributes, the description "1.1" (LDAP_NO_ATTRS)
should be listed by itself.
.LP
The \fIattrsonly\fP parameter should be set to a non-zero value
if only attribute descriptions are wanted.  It should be set to zero (0)
if both attributes descriptions and attribute values are wanted.
.LP
The \fIserverctrls\fP and \fIclientctrls\fP parameters may be used
to specify server and client controls, respectively.
.LP
The
.B ldap_search_ext_s()
routine is the synchronous version of
.BR ldap_search_ext().
.LP
It also returns a code indicating success or, in the
case of failure, indicating the nature of the failure
of the operation.  See
.BR ldap_error (3)
for details.
.SH NOTES
Note that both read
and list functionality are subsumed by these routines,
by using a filter like "(objectclass=*)" and a scope of LDAP_SCOPE_BASE (to
emulate read) or LDAP_SCOPE_ONELEVEL (to emulate list).
.LP
These routines may dynamically allocate memory. The caller is
responsible for freeing such memory using supplied deallocation
routines. Return values are contained in <ldap.h>.
.LP
Note that \fIres\fR parameter of
.B ldap_search_ext_s()
and
.B ldap_search_s()
should be freed with
.B ldap_msgfree()
regardless of return value of these functions.
.SH DEPRECATED INTERFACES
The 
.B ldap_search()
routine is deprecated in favor of the
.B ldap_search_ext()
routine.  The 
.B ldap_search_s()
and
.B ldap_search_st()
routines are deprecated in favor of the
.B ldap_search_ext_s()
routine.
.LP
.lf 1 ./Deprecated
Deprecated interfaces generally remain in the library.  The macro
LDAP_DEPRECATED can be defined to a non-zero value
(e.g., -DLDAP_DEPRECATED=1) when compiling program designed to use
deprecated interfaces.  It is recommended that developers writing new
programs, or updating old programs, avoid use of deprecated interfaces.
Over time, it is expected that documentation (and, eventually, support) for
deprecated interfaces to be eliminated.
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.SH SEE ALSO
.BR ldap (3),
.BR ldap_result (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.  
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