Re: retrieve all entries of a search

[Pierangelo Masarati <ando@sys-net.it>]

Francois Beretti wrote:

> Hi Pierangelo
>
> Pierangelo Masarati wrote:
>
> > In 2.2 you can specify limits based on the identity that's requesting 
> > the search; these limits include "unlimited".  See "limits" in 
> > slapd.conf(5).
>
>
> Thank you, but I don't want to have to modify the server 
> configuration. Actually I am writing software that has to be installed 
> on the customer's network, and if every application using LDAP has to 
> modify the server's configuration, I don't want to be the 
> administrator...
> Moreover, even if not every user has to be able to retrieve all the 
> entries of a search result, I can't know who will have to be. 

Note that pagedResults doesn't implicitly mean you can get all the 
entries.  In fact, the usual size limits apply to search results as a 
whole, regardless of data being returned in just one bloack or in paged 
chunks.  However, slapd allows to set different limits for paged results 
searches (including unlimited number of results).  In your case, you may 
want to set a certain limit (e.g. the default) for regular searches, and 
unlimited (or at least a higher value) for paged results.  The "limits" 
statement on slapd.conf(5) contains details about the syntax.

> > > Extended Control paged results is supported by OpenLDAP
> > > ldapsearch -Epr=<n>
> >
> >
> > ... since 2.1; there were selected bugs which were fixed in 2.2 at 
> > some point.
>
>
> I am sorry, I thought it was not implemented.
> Where can I find a documentation about how to use the C API to 
> implement this on an LDAP client ? 

It's implemented in ldapsearch.c; look at that code, it should be quite 
clear.

> Just to get all the information I need, with the former versions, was 
> it possible to retrieve the complet result of a search without using 
> paged search, and without an unlimited size ?

Clients by no means can work around server limitations (except by 
binding as rootdn) so I don't think you can obtain what you want using 
older versions of either slapd or the client library.  Note, however, 
that you can use the pagedresults control with older libraries, provided 
they support controls.

p.



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