10-07-2006
With tags...
daemon main function
---------------------
create a socket for listening clients, say socket1
bind the socket
listen to the socket
for ever {
accept connections from clients
create a detachable thread to process the request,
given the socket i.e. socket1
}
thread start_function
--------------------
read the request from given socket i.e. socket1
DO SOME PROCESSING
-----
create another socket for vendor server, say socket2
connect to the socket, socket2
Write received request to socket2
read results from socket2 (vendor server)
close socket2
-----
write final results to client i.e. socket1
close socket1
Exit from the thread
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ypxfrd(8) System Manager's Manual ypxfrd(8)
NAME
ypxfrd - High speed NIS map transfer daemon
SYNOPSIS
/usr/sbin/ypxfrd
DESCRIPTION
The ypxfrd daemon is the transfer agent that handles map transfer requests from yppush on the master server and ypxfr on slave servers and
clients. This program performs the actual transfer of the NIS maps to slave servers and clients. Typically, the maps are transferred to
all slave servers and clients unless the transfer is restricted to those subnets or hosts by an entry or entries in the /etc/yp/securenets
file. See ypserv(8) for information on this file.
The ypxfrd daemon is activated at system startup time by an entry in the /sbin/init.d/nis file of an NIS master server machine. If the log
file /var/cluster/members/{memb}/yp/ypxfrd.log exists, ypxfrd appends all its output to that file. You can use the log file to retain a
record of what was attempted, and the results.
See ypfiles(4) and ypserv(8) for an overview of NIS.
RESTRICTIONS
The ypxfrd daemon transfers NIS maps stored as ndbm files only. It does not transfer maps stored as btree or hash files.
FILES
The ypxrfd log file. Each cluster member has its own copy.
SEE ALSO
Commands: yppush(8), ypserv(8), ypxfr(8)
Files: ypfiles(4)
ypxfrd(8)