.\"	$OpenBSD: ypxfr.8,v 1.23 2021/02/02 07:37:18 jmc Exp $
.\"
.\" Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
.\" 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
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.\" 2. Redistributions in binary form must reproduce the above copyright
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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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.Dd $Mdocdate: February 2 2021 $
.Dt YPXFR 8
.Os
.Sh NAME
.Nm ypxfr ,
.Nm ypxfr_1perhour ,
.Nm ypxfr_1perday ,
.Nm ypxfr_2perday
.Nd get a YP map from YP server
.Sh SYNOPSIS
.Nm ypxfr
.Op Fl cf
.Op Fl C Ar tid prog ipadd port
.Op Fl d Ar domain
.Op Fl h Ar host
.Op Fl s Ar domain
.Ar mapname
.Sh DESCRIPTION
.Nm ypxfr
is the utility in YP that transfers maps to the local host.
.Pp
Since the YP master transfers a map when it has changed, a YP slave should
check for missed maps regularly.
This can be done via an entry in
.Xr crontab 5 .
The scripts
.Ar ypxfr_1perhour , ypxfr_2perday
and
.Ar ypxfr_1perday
could be used for that.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl C Ar tid prog ipadd port
This option is only used by ypserv.
This is to open communication with a yppush on another host.
.It Fl c
Don't send a "Clear current map" to local ypserv process.
Useful if ypserv isn't running locally to avoid timeout message.
.It Fl d Ar domain
Don't use default domain, use the specified domain.
.It Fl f
Force map transfer, even if version of master is older than local copy.
.It Fl h Ar host
Get map from host instead of the maps master host.
.It Fl s Ar domain
Specify a source domain other than the target domain.
.El
.Sh FILES
.Bl -tag -width /usr/sbin/ypxfr_1perhour -compact
.It Pa /usr/sbin/ypxfr_1perhour
.It Pa /usr/sbin/ypxfr_2perday
.It Pa /usr/sbin/ypxfr_1perday
.El
.Sh SEE ALSO
.Xr yp 8 ,
.Xr yppush 8 ,
.Xr ypserv 8
.Sh AUTHORS
.An Mats O Jansson Aq Mt moj@stacken.kth.se