NAME

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

LIBRARY

       OpenLDAP LDAP (libldap, -lldap)

SYNOPSIS

       #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

       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
       parameter.

       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 search.

       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 ldap_search_ext().

       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

       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).

       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.

DEPRECATED INTERFACES

       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

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

ACKNOWLEDGEMENTS

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