more to partial fulfilment of ITS#3639

doc/man/man5/slapd-shell.5

@@ -134,6 +134,89 @@ where only RESULT is mandatory.
 The \fBsearch\fP RESULT should be preceded by the entries in LDIF
 format, each entry followed by a blank line.
 Lines starting with `#' or `DEBUG:' are ignored.
+.SH ACCESS CONTROL
+The
+.B shell
+backend does not honor all ACL semantics as described in
+.BR slapd.access (5).
+In general, access to objects is checked by using a dummy object
+that contains only the DN, so access rules that rely on the contents
+of the object are not honored.
+In detail:
+.LP
+The
+.B add
+operation does not require
+.B write (=w)
+access to the 
+.B children
+pseudo-attribute of the parent entry.
+.LP
+The
+.B bind
+operation requires 
+.B auth (=x)
+access to the 
+.B entry
+pseudo-attribute of the entry whose identity is being assessed;
+.B auth (=x)
+access to the credentials is not checked, but rather delegated 
+to the underlying shell script.
+.LP
+The
+.B compare
+operation requires 
+.B read (=r)
+access (FIXME: wouldn't 
+.B compare (=c)
+be a more appropriate choice?)
+to the 
+.B entry
+pseudo-attribute
+of the object whose value is being asserted;
+.B compare (=c)
+access to the attribute whose value is being asserted is not checked.
+.LP
+The
+.B delete
+operation does not require
+.B write (=w)
+access to the 
+.B children
+pseudo-attribute of the parent entry.
+.LP
+The
+.B modify
+operation requires
+.B write (=w)
+access to the 
+.B entry 
+pseudo-attribute;
+.B write (=w)
+access to the specific attributes that are modified is not checked.
+.LP
+The
+.B modrdn
+operation does not require
+.B write (=w)
+access to the 
+.B children
+pseudo-attribute of the parent entry, nor to that of the new parent,
+if different;
+.B write (=w)
+access to the distinguished values of the naming attributes
+is not checked.
+.LP
+The
+.B search 
+operation does not require
+.B search (=s)
+access to the 
+.B entry
+pseudo_attribute of the searchBase;
+.B search (=s)
+access to the attributes and values used in the filter is not checked.
+
 .SH EXAMPLE
 There is an example search script in the slapd/back-shell/ directory
 in the OpenLDAP source tree.

doc/man/man5/slapd.access.5

@@ -922,43 +922,20 @@ attribute of the authorizing identity and/or on the
 attribute of the authorized identity.
 
 .LP
-Some backends do not honor all the above rules.  In detail:
-
-.TP
-.B bacl-ldap/back-meta
-\fIdo not check\fP
-.B write (=w)
-access, since it is delegated to the remote host(s) serving
-the naming context.
-The same applies to checking
-.B search (=s)
-access to the 
-.B entry
-pseudo-attribute of the
-.B searchBase 
-of a search operation, 
-.B search (=s)
-access to the attributes used in the
-.BR searchFilter ,
+Access control to search entries is checked by the frontend,
+so it is fully honored by all backends; for all other operations
+and for the discovery phase of the search operation,
+full ACL semantics is only supported by the primary backends, i.e.
+.BR back-bdb (5),
+.BR back-hdb (5),
 and
-.B disclose (=d)
-access to the
-.B entry
-pseudo-attribute of any object in case of error: all those checks 
-are delegated to the remote host(s).
-In any case,
-.B read (=r) 
-access is honored locally by the frontend.
+.BR back-ldbm (5).
 
-.TP
-.B back-shell
-requires
-.B write (=w)
-access to the 
-.B entry 
-pseudo-attribute for the modify operation; in the meanwhile, 
-\fIwrite access to the specific attributes that are modified
-is not checked\fP.
+Some other backend, like
+.BR back-sql (5),
+may fully support them; others may only support a portion of the 
+described semantics, or even differ in some aspects.
+The relevant details are described in the backend-specific man pages.
 
 .SH CAVEATS
 It is strongly recommended to explicitly use the most appropriate
@@ -1038,6 +1015,7 @@ ETCDIR/slapd.conf
 default slapd configuration file
 .SH SEE ALSO
 .BR slapd (8),
+.BR slapd-* (5),
 .BR slapacl (8),
 .BR regex (7),
 .BR re_format (7)