173 lines
5.9 KiB
Groff
173 lines
5.9 KiB
Groff
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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 1.2 1996/01/12 06:21:52 wpaul Exp wpaul $
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.\"
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.Dd February 5, 1995
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.Dt YPPUSH 8
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.Os
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.Sh NAME
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.Nm yppush
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.Nd "force propagation of updated NIS databases"
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.Sh SYNOPSIS
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.Nm yppush
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.Op Fl d Ar domain
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.Op Fl t Ar timeout
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.Op Fl j Ar #parallel jobs
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.Op Fl h Ar host
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.Op Fl p Ar path
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.Op Fl v
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.Ar mapname
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.Sh DESCRIPTION
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.Nm yppush
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distributes updated NIS databases (or
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.Pa maps )
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from an NIS master server to NIS slave servers within an NIS
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domain. It is normally only run on the NIS master by
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.Pa /var/yp/Makefile
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whenever any of the NIS maps are updated. Note that
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.Pa /var/yp/Makefile
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does not invoke
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.Nm yppush
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by default: the
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.Nm NOPUSH=True
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entry in the Makefile must first be commented out
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(the default FreeBSD configuration assumes a small network with only
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a single NIS server; in such a configuration,
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.Nm yppush
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is not needed).
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.Pp
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By default,
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.Nm yppush
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determines the names of the slave servers for a domain by searching the
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.Pa ypservers
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map. A destination host (or a list of hosts) can also be manually
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specified on the command line.
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Once it has a complete list of slave servers, it sends a 'map transfer'
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request to each slave, which in turn reads a copy of the map from
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the master NIS server using
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.Xr ypxfr 8 .
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Included within each request is the name of the map to be copied
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and some special information required by
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.Xr ypxfr 8
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to successfully 'callback' to
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.Nm yppush
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and carry out the transfer. Any error messages
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.Nm yppush
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receives from
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.Xr ypxfr 8
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via callback will be printed to stderr.
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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 yppush :
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.Bl -tag -width flag
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.It Fl d Ar domain
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Specify a particular domain. The NIS domain of
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the local host system is used by default. If the local host's domain
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name is not set, the domain name must be specified with this flag.
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.It Fl t Ar timeout
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The
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.Fl t
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flag is used to specify a timeout value in seconds. This timeout
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controls how long
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.Nm yppush
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will wait for a response from a slave server before sending a
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map transfer request to the next slave server in its list.
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.It Fl j Ar #parallel jobs
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.Nm yppush
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normally performs transfers serially, meaning that it will
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send a map transfer request to one slave server and then wait for
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it to respond before moving on to the next slave server. In environments
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with many slaves, it is more efficient to initiate several map transfers
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at once so that the transfers can take place in parallel. The
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.Fl j
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flag is used to specify the desired number of parallel jobs:
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.Nm yppush
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will initiate the specified number of transfers immediately and
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listen for responses. If the number of specified parallel jobs is
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less than the number of slave servers,
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.Nm yppush
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will initiate only the number of specified jobs and then wait
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for some of them to finish before starting any more.
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.Pp
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Note that
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.Nm yppush
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handles callbacks asynchronously, which means that it will collect
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and display the callback information received from
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.Xr ypxfr 8
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as soon as it arrives, even it arrives before all of the map
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transfer requests have been sent.
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.It Fl h Ar host
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The
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.Fl h
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flag can be used to transfer a map to a user-specified machine or
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group of machines instead of the list of servers contained in
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the
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.Pa ypservers
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map. A list of hosts can be specified by using multiple
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instances of the
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.Fl h
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flag.
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.It Fl p Ar path
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By default,
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.Nm yppush
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expects all the local NIS maps to be stored under
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.Pa /var/yp .
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The
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.Fl p
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flag can be used to specify an alternate path in the event that
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the system administrator decides to store the NIS maps somewhere else.
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.It Fl v
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Verbose mode: causes
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.Nm yppush
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to print debugging messages as it runs. Note specifying this flag twice
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makes
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.Nm yppush
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even more verbose.
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.Sh FILES
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.Bl -tag -width Pa -compact
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.It Pa /var/yp/[domainname]/ypservers
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The NIS ypservers map containing the names of all servers in
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a particular NIS domain.
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.El
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.Sh SEE ALSO
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.Xr ypserv 8 ,
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.Xr ypxfr 8 ,
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.Xr yp 8
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.Sh BUGS
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The mechanism for transfering NIS maps in NIS v1 is different
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that that in NIS version 2. This version of
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.Nm yppush
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has support for transfering maps to NIS v2 systems only.
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.Sh AUTHOR
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Bill Paul <wpaul@ctr.columbia.edu>
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