ldap_search_ext(3) — Linux manual page


LDAP_SEARCH(3)            Library Functions Manual            LDAP_SEARCH(3)

NAME         top

       ldap_search,    ldap_search_s,    ldap_search_st,    ldap_search_ext,
       ldap_search_ext_s - Perform an LDAP search operation

LIBRARY         top

       OpenLDAP LDAP (libldap, -lldap)

SYNOPSIS         top

       #include <sys/types.h>
       #include <ldap.h>

       int ldap_search_ext(
              LDAP *ld,
              char *base,
              int scope,
              char *filter,
              char *attrs[],
              int attrsonly,
              LDAPControl **serverctrls,
              LDAPControl **clientctrls,
              struct timeval *timeout,
              int sizelimit,
              int *msgidp );

       int ldap_search_ext_s(
              LDAP *ld,
              char *base,
              int scope,
              char *filter,
              char *attrs[],
              int attrsonly,
              LDAPControl **serverctrls,
              LDAPControl **clientctrls,
              struct timeval *timeout,
              int sizelimit,
              LDAPMessage **res );

DESCRIPTION         top

       These routines are used to perform LDAP search operations.  The
       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 res

       The 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 msgidp parameter.

       The base parameter is the DN of the entry at which to start the

       The scope 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.

       The filter 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=*).

       The attrs 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.

       The attrsonly 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.

       The serverctrls and clientctrls parameters may be used to specify
       server and client controls, respectively.

       The ldap_search_ext_s() routine is the synchronous version of

       It also returns a code indicating success or, in the case of failure,
       indicating the nature of the failure of the operation.  See
       ldap_error(3) for details.

NOTES         top

       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

       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>.

       Note that res parameter of ldap_search_ext_s() and ldap_search_s()
       should be freed with ldap_msgfree() regardless of return value of
       these functions.


       The ldap_search() routine is deprecated in favor of the
       ldap_search_ext() routine.  The ldap_search_s() and ldap_search_st()
       routines are deprecated in favor of the ldap_search_ext_s() routine.

       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.

SEE ALSO         top

       ldap(3), ldap_result(3), ldap_error(3)


       OpenLDAP Software is developed and maintained by The OpenLDAP Project
       <http://www.openldap.org/>.  OpenLDAP Software is derived from the
       University of Michigan LDAP 3.3 Release.

COLOPHON         top

       This page is part of the OpenLDAP (an open source implementation of
       the Lightweight Directory Access Protocol) project.  Information
       about the project can be found at ⟨http://www.openldap.org/⟩.  If you
       have a bug report for this manual page, see
       ⟨http://www.openldap.org/its/⟩.  This page was obtained from the
       project's upstream Git repository
       ⟨https://git.openldap.org/openldap/openldap.git⟩ on 2020-11-01.  (At
       that time, the date of the most recent commit that was found in the
       repository was 2020-10-30.)  If you discover any rendering problems
       in this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or im‐
       provements to the information in this COLOPHON (which is not part of
       the original manual page), send a mail to man-pages@man7.org

OpenLDAP LDVERSION               RELEASEDATE                  LDAP_SEARCH(3)

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