.\"	$OpenBSD: mkalias.8,v 1.10 2009/10/20 09:47:03 sobrado Exp $
.\"
.\" Copyright (c) 1997 Mats O Jansson <moj@stacken.kth.se>
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" 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.
.\"
.Dd $Mdocdate: October 20 2009 $
.Dt MKALIAS 8
.Os
.Sh NAME
.Nm mkalias
.Nd a YP map conversion program
.Sh SYNOPSIS
.Nm mkalias
.Op Fl nv
.Oo
.Fl E | e
.Op Fl du
.Oc
.Ar input
.Op Ar output
.Sh DESCRIPTION
.Nm
is used to convert a mail.aliases map to a mail.byaddr map.
This is an inverse map of user@host (or user!host) back to alias.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl d
Assume domain names are OK.
Only useful together with
.Fl E
or
.Fl e .
.It Fl E
Same as
.Fl e ,
but also check for any MX-record.
.It Fl e
Check host to verify that it exists.
.It Fl n
Capitalize name. e.g., mats.o.jansson becomes Mats.O.Jansson.
.It Fl u
Assume UUCP names are OK.
Only useful together with
.Fl E
or
.Fl e .
.It Fl v
Verbose mode.
.It Ar input
Use this map as input.
.It Ar output
Use this map as output.
If the output map isn't given don't create database.
Can be useful together with
.Fl E
or
.Fl e .
.El
.Sh SEE ALSO
.Xr yp 8 ,
.Xr ypserv 8
.Sh AUTHORS
.An Mats O Jansson Aq moj@stacken.kth.se
.Sh BUGS
.Nm
on SunOS 4.1.x seems to have a
.Fl s .
Since I don't know what it is supposed to do I haven't implemented it.
But it is accepted by the program.