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+.\" Copyright (c) 2004 - 2006 Kungliga Tekniska Högskolan
+.\" (Royal Institute of Technology, Stockholm, Sweden).
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\"
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\"
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" 3. Neither the name of the Institute nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $Id: krb5_expand_hostname.3 17461 2006-05-05 13:13:18Z lha $
+.\"
+.Dd May  5, 2006
+.Dt KRB5_EXPAND_HOSTNAME 3
+.Os HEIMDAL
+.Sh NAME
+.Nm krb5_expand_hostname ,
+.Nm krb5_expand_hostname_realms
+.Nd Kerberos 5 host name canonicalization functions
+.Sh LIBRARY
+Kerberos 5 Library (libkrb5, -lkrb5)
+.Sh SYNOPSIS
+.In krb5.h
+.Pp
+.Ft krb5_error_code
+.Fo krb5_expand_hostname
+.Fa "krb5_context context"
+.Fa "const char *orig_hostname"
+.Fa "char **new_hostname"
+.Fc
+.Ft krb5_error_code
+.Fo krb5_expand_hostname_realms
+.Fa "krb5_context context"
+.Fa "const char *orig_hostname"
+.Fa "char **new_hostname"
+.Fa "char ***realms"
+.Fc
+.Sh DESCRIPTION
+.Fn krb5_expand_hostname
+tries to make
+.Fa orig_hostname
+into a more canonical one in the newly allocated space returned in
+.Fa new_hostname .
+Caller must free the hostname with
+.Xr free 3 .
+.Pp
+.Fn krb5_expand_hostname_realms
+expands
+.Fa orig_hostname
+to a name we believe to be a hostname in newly
+allocated space in
+.Fa new_hostname
+and return the realms
+.Fa new_hostname
+is belive to belong to in
+.Fa realms .
+.Fa Realms
+is a array terminated with
+.Dv NULL .
+Caller must free the
+.Fa realms
+with
+.Fn krb5_free_host_realm 
+and
+.Fa new_hostname
+with
+.Xr free 3 .
+.Sh SEE ALSO
+.Xr krb5 3 ,
+.Xr krb5_free_host_realm 3 ,
+.Xr krb5_get_host_realm 3 ,
+.Xr kerberos 8