.\" Copyright (c) 1991, 1993, 1995 .\" The Regents of the University of California. 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. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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: yppush.8,v 1.2 1996/01/12 06:21:52 wpaul Exp wpaul $ .\" .Dd February 5, 1995 .Dt YPPUSH 8 .Os .Sh NAME .Nm yppush .Nd "force propagation of updated NIS databases" .Sh SYNOPSIS .Nm yppush .Op Fl d Ar domain .Op Fl t Ar timeout .Op Fl j Ar #parallel jobs .Op Fl h Ar host .Op Fl p Ar path .Op Fl v .Ar mapname .Sh DESCRIPTION .Nm yppush distributes updated NIS databases (or .Pa maps ) from an NIS master server to NIS slave servers within an NIS domain. It is normally only run on the NIS master by .Pa /var/yp/Makefile whenever any of the NIS maps are updated. Note that .Pa /var/yp/Makefile does not invoke .Nm yppush by default: the .Nm NOPUSH=True entry in the Makefile must first be commented out (the default FreeBSD configuration assumes a small network with only a single NIS server; in such a configuration, .Nm yppush is not needed). .Pp By default, .Nm yppush determines the names of the slave servers for a domain by searching the .Pa ypservers map. A destination host (or a list of hosts) can also be manually specified on the command line. Once it has a complete list of slave servers, it sends a 'map transfer' request to each slave, which in turn reads a copy of the map from the master NIS server using .Xr ypxfr 8 . Included within each request is the name of the map to be copied and some special information required by .Xr ypxfr 8 to successfully 'callback' to .Nm yppush and carry out the transfer. Any error messages .Nm yppush receives from .Xr ypxfr 8 via callback will be printed to stderr. .Pp .Sh OPTIONS The following options are supported by .Nm yppush : .Bl -tag -width flag .It Fl d Ar domain Specify a particular domain. The NIS domain of the local host system is used by default. If the local host's domain name is not set, the domain name must be specified with this flag. .It Fl t Ar timeout The .Fl t flag is used to specify a timeout value in seconds. This timeout controls how long .Nm yppush will wait for a response from a slave server before sending a map transfer request to the next slave server in its list. .It Fl j Ar #parallel jobs .Nm yppush normally performs transfers serially, meaning that it will send a map transfer request to one slave server and then wait for it to respond before moving on to the next slave server. In environments with many slaves, it is more efficient to initiate several map transfers at once so that the transfers can take place in parallel. The .Fl j flag is used to specify the desired number of parallel jobs: .Nm yppush will initiate the specified number of transfers immediately and listen for responses. If the number of specified parallel jobs is less than the number of slave servers, .Nm yppush will initiate only the number of specified jobs and then wait for some of them to finish before starting any more. .Pp Note that .Nm yppush handles callbacks asynchronously, which means that it will collect and display the callback information received from .Xr ypxfr 8 as soon as it arrives, even it arrives before all of the map transfer requests have been sent. .It Fl h Ar host The .Fl h flag can be used to transfer a map to a user-specified machine or group of machines instead of the list of servers contained in the .Pa ypservers map. A list of hosts can be specified by using multiple instances of the .Fl h flag. .It Fl p Ar path By default, .Nm yppush expects all the local NIS maps to be stored under .Pa /var/yp . The .Fl p flag can be used to specify an alternate path in the event that the system administrator decides to store the NIS maps somewhere else. .It Fl v Verbose mode: causes .Nm yppush to print debugging messages as it runs. Note specifying this flag twice makes .Nm yppush even more verbose. .Sh FILES .Bl -tag -width Pa -compact .It Pa /var/yp/[domainname]/ypservers The NIS ypservers map containing the names of all servers in a particular NIS domain. .El .Sh SEE ALSO .Xr ypserv 8 , .Xr ypxfr 8 , .Xr yp 8 .Sh BUGS The mechanism for transfering NIS maps in NIS v1 is different that that in NIS version 2. This version of .Nm yppush has support for transfering maps to NIS v2 systems only. .Sh AUTHOR Bill Paul