YPPUSH(NADM) System V NFS (11/29/90) YPPUSH(NADM)
NAME
yppush - force propagation of a changed NIS map
SYNOPSIS
yppush [ -d domain ] [ -v ] mapname
DESCRIPTION
yppush copies a new version of a network information service
(NIS) map from the master NIS server to the slave NIS
servers. It is normally run only on the master NIS server
by make in /etc/yp after the master databases are changed.
It first constructs a list of NIS server hosts by reading
the NIS map ypservers within the domain domain. Keys within
the map ypservers are the ASCII names of the machines on
which the NIS servers run.
A ``transfer map'' request is sent to the NIS server at each
host, along with the information needed by the transfer
agent (the program which actually moves the map) to call
back the yppush. When the attempt has completed
(successfully or not) and the transfer agent has sent yppush
a status message, the results may be printed to stdout.
Messages are also printed when a transfer is not possible;
for instance when the request message is undeliverable or
when the timeout period on responses has expired.
Note: Only abbreviated mapnames (that is, less than 10
characters long) may be used. This is due to restrictions
involving the System V local file system. See
ypmapxlate(NF) for more details.
Refer to ypfiles(NF) and ypserv(NADM) for an overview of the
network information service.
OPTIONS
-d Specify a domain.
-v Verbose. This causes messages to be printed when each
server is called and for each response. If this flag
is omitted, only error messages are printed.
FILES
/etc/yp/domainname/ypservers.{dir, pag}
SEE ALSO
ypserv(NADM), ypxfr(NADM), ypfiles(NF), ypmapxlate(NF), NIS
Protocol Specification
BUGS
In the current implementation (version 2 NIS protocol), the
transfer agent is ypxfr, which is started by the ypserv
program. If yppush detects that it is speaking to a version
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YPPUSH(NADM) System V NFS (11/29/90) YPPUSH(NADM)
1 NIS protocol server, it uses the older protocol (by
sending a version 1 YPPROC_GET request) and issues a message
to that effect. Unfortunately, there is no way of knowing
if or when the map transfer is performed for version 1
servers. yppush prints a message saying that an "old-style"
message has been sent. The System Administrator should
check later to see that the transfer has actually taken
place.
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