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.TH SLAPO-CONSTRAINT 5 "RELEASEDATE" "OpenLDAP LDVERSION"
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.\" Copyright 2005-2006 Hewlett-Packard Company
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2008-01-08 08:19:56 +08:00
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.\" Copyright 2006-2008 The OpenLDAP Foundation All Rights Reserved.
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.\" $OpenLDAP$
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.SH NAME
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slapo-constraint \- Attribute Constraint Overlay to slapd
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.SH SYNOPSIS
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ETCDIR/slapd.conf
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.SH DESCRIPTION
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The constraint overlay is used to ensure that attribute values match
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some constraints beyond basic LDAP syntax. Attributes can
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have multiple constraints placed upon them, and all must be satisfied
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when modifying an attribute value under constraint.
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.LP
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This overlay is intended to be used to force syntactic regularity upon
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certain string represented data which have well known canonical forms,
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like telephone numbers, post codes, FQDNs, etc.
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.LP
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It constrains only LDAP adds and modify commands and only seeks to
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control the add and modify value of a modify request.
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.SH CONFIGURATION
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This
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.B slapd.conf
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option applies to the constraint overlay.
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It should appear after the
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.B overlay
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directive.
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.TP
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.B constraint_attribute <attribute_name> <type> <value>
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Specifies the constraint which should apply to the attribute named as
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the first parameter.
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Two types of constraint are currently supported -
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.B regex
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and
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.BR uri .
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The parameter following the
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.B regex
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type is a Unix style regular expression (See
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.BR regex (7)
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). The parameter following the
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.B uri
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type is an LDAP URI. The URI will be evaluated using an internal search.
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It must not include a hostname, and it must include a list of attributes
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to evaluate.
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Any attempt to add or modify an attribute named as part of the
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constraint overlay specification which does not fit the
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constraint listed will fail with a
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LDAP_CONSTRAINT_VIOLATION error.
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.SH EXAMPLES
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.LP
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.RS
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.nf
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overlay constraint
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constraint_attribute mail regex ^[:alnum:]+@mydomain.com$
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constraint_attribute title uri
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ldap:///dc=catalog,dc=example,dc=com?title?sub?(objectClass=titleCatalog)
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.fi
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A specification like the above would reject any
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.B mail
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attribute which did not look like
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.B
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<alpha-numeric string>@mydomain.com
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It would also reject any
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.B title
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attribute whose values were not listed in the
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.B title
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attribute of any
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.B titleCatalog
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entries in the given scope.
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.RE
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.SH FILES
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.TP
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ETCDIR/slapd.conf
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default slapd configuration file
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.SH SEE ALSO
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.BR slapd.conf (5).
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.SH ACKNOWLEDGEMENTS
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This module was written in 2005 by Neil Dunbar of Hewlett-Packard and subsequently
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extended by Howard Chu and Emmanuel Dreyfus.
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.so ../Project
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