Manpage for krb5_free_host_realm, krb5_get_default_realm,
krb5_get_default_realms, krb5_get_host_realm, and krb5_set_default_realm. git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11790 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Love Hörnquist Åstrand
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lib/krb5/krb5_set_default_realm.3
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144
lib/krb5/krb5_set_default_realm.3
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.\" Copyright (c) 2003 Kungliga Tekniska H<>gskolan
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.\" (Royal Institute of Technology, Stockholm, Sweden).
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Institute nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id$
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.\"
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.Dd Mar 16, 2003
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.Dt KRB5_SET_DEFAULT_REALM 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_free_host_realm
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.Nm krb5_get_default_realm
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.Nm krb5_get_default_realms
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.Nm krb5_get_host_realm
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.Nm krb5_set_default_realm
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.Nd default and host realm read and manipulation routines
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.Sh LIBRARY
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Kerberos 5 Library (libkrb5, -lkrb5)
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.Sh SYNOPSIS
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.Fd #include <krb5.h>
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.Ft krb5_error_code
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.Fo krb5_free_host_realm
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.Fa "krb5_context context"
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.Fa "krb5_realm *realmlist"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_default_realm
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.Fa "krb5_context context"
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.Fa "krb5_realm *realm"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_default_realms
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.Fa "krb5_context context"
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.Fa "krb5_realm **realm"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_get_host_realm
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.Fa "krb5_context context"
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.Fa "const char *host"
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.Fa "krb5_realm **realms"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_set_default_realm
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.Fa "krb5_context context"
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.Fa "const char *realm"
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.Fc
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.Sh DESCRIPTION
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.Fn krb5_free_host_realm
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frees all memory allocated by
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.Fa realmlist .
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.Pp
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.Fn krb5_get_default_realm
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returns the first default realm for this host.
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The realm returned should be free with
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.Fn free .
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.Pp
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.Fn krb5_get_default_realms
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returns a
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.Dv NULL
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terminated list of default realms for this context.
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Realms returned by
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.Fn krb5_get_default_realms
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should be free with
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.Fn krb5_free_host_realm .
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.Pp
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.Fn krb5_get_host_realm
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returns a
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.Dv NULL
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terminated list of realms for
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.Fa host
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by looking up the information in the
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.Li [domain_realm]
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in
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.Pa krb5.conf
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or in
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.Li DNS .
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If the mapping in
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.Li [domain_realm]
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results in the string
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.Li dns_locate ,
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DNS is used to lookup the realm.
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.Pp
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When using
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.Li DNS
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to a resolve the domain for the host a.b.c,
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.Fn krb5_get_host_realm
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looks for a
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.Dv TXT
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resource record named
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.Li _kerberos.a.b.c ,
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and if not found, it strips off the first component and tries a again
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(_kerberos.b.c) until it reaches the root.
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.Pp
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If there is no configuration or DNS information found,
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.Fn krb5_get_host_realm
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assumes it can use the domain part of the
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.Fa host
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to form a realm.
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.Pp
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.Fn krb5_set_default_realm
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sets the default realm for the
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.Fa context .
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If
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.Dv NULL
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is used as a
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.Fa realm ,
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the
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.Li [libdefaults]default_realm
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stanza in
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.Pa krb5.conf
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is used.
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If there is no such stanza in the configuration file, the
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.Fn krb5_get_host_realm
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function is used to form a default realm.
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.Sh SEE ALSO
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.Xr krb5.conf 5 ,
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.Xr free 3
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