First crack at a man page for ypbind.
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Bill Paul
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# from: @(#)Makefile 5.8 (Berkeley) 7/28/90
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# $Id: Makefile,v 1.2 1994/02/17 07:06:06 rgrimes Exp $
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# $Id: Makefile,v 1.1 1994/08/08 01:03:57 wollman Exp $
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PROG= ypbind
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NOMAN=
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MAN8= ypbind.8
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CFLAGS+=-DDAEMON
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.include <bsd.prog.mk>
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120
usr.sbin/ypbind/ypbind.8
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120
usr.sbin/ypbind/ypbind.8
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.\" Copyright (c) 1991, 1993, 1995
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.\" The Regents of the University of California. 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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.\" 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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.\" 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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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: yppush.8,v 1.1 1995/02/05 21:48:04 wpaul Exp $
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.\"
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.Dd April 9, 1995
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.Dt YPBIND 8
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.Os
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.Sh NAME
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.Nm ypbind
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.Nd "NIS domain binding daemon"
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.Sh SYNOPSIS
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.Nm ypbind
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.Op Fl ypset
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.Op Fl ypsetme
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.Op Fl s
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.Sh DESCRIPTION
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.Nm ypbind
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is the process that maintains NIS binding information. At startup,
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it searches for an NIS server responsible for serving the system's
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default domain (as set by the
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.Xr domainname 1
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command) using network broadcasts. Initially,
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.Nm ypbind
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will broadcast every five seconds. Once it receives a reply,
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it will store the address of the server and other
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information in a special file located in
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.Pa /var/yp/binding .
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The NIS routines in the standard C library can then use this file
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when processing NIS requests. There may be several such files
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since it is possible for an NIS client to be bound to more than
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one domain.
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.Pp
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After a binding has been established,
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.Nm ypbind
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will send DOMAIN_NONACK requests to the NIS server at one minute
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intervals. If it fails to receive a reply to one of these requests
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within twenty seconds,
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.Nm ypbind
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assumes that the server is no longer running and resumes its five second
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broadcasts until another binding is established.
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.Nm ypbind
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will also log warning messages using the syslog(3) facility each time
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it detects that a server has stopped responding, as well as when it
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has bound to a new server.
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.Pp
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.Sh OPTIONS
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The following options are supported by
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.Nm ypbind :
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.Bl -tag -width flag
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.It Fl ypset
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It is possible to force
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.Nm ypbind
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to bind to a particular NIS server host for a given domain by using the
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.Xr ypset 8
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command. However,
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.Nm ypbind
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refuses YPBINDPROC_SETDOM requests by default since it has no way of
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knowing exactly who is sending them. Using the
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.Fl ypset
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flag causes
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.Nm ypbind
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to accept YPBINDPROC_SETDOM requests from any host. This option should only
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be used for diagnostic purposes and only for limited periods since allowing
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arbitrary users to reset the binsing of an NIS client poses a severe
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security risk.
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.It Fl ypsetme
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This is similar to the
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.Fl ypset
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flag, except that it only permits YPBINDPROC_SETDOM requests to be processed
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if they originated from the local host.
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.It Fl s
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The
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.Fl s
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flag causes
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.Nm ypbind
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to run in secure mode: it will refuse to bind to any NIS server
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that is not running as root (i.e. that is not using privileged
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TCP ports).
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.Sh FILES
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.Bl -tag -width Pa -compact
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.It Pa /var/yp/binding/[domainname].[version]
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The files used to hold binding information for each NIS domain.
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.El
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.Sh SEE ALSO
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.Xr syslog 3 ,
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.Xr domainname 1 ,
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.Xr ypserv 8 ,
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.Xr ypset 8 ,
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.Xr yp 8
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.Sh AUTHOR
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Theo de Raadt <deraadt@fsa.ca>
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