NAME¶
nns - Name service facility, Commandline Client Application
SYNOPSIS¶
nns bind ?
-host host? ?
-port port?
name data
nns search ?
-host host? ?
-port port?
?
-continuous? ?
pattern?
nns ident ?
-host host? ?
-port port?
nns who
DESCRIPTION¶
Please read
Name service facility, introduction first.
The application described by this document,
nns, is a simple command line
client for the nano name service facility provided by the Tcllib packages
nameserv, and
nameserv::server. Beyond that the application's
sources also serve as an example of how to use the client package
nameserv. All abilities of a client are covered, from configuration to
registration of names to searching.
This name service facility has nothing to do with the Internet's
Domain Name
System, otherwise known as
DNS. If the reader is looking for a
package dealing with that please see either of the packages
dns and
resolv, both found in Tcllib too.
USE CASES¶
nns was written with the following two main use cases in mind.
- [1]
- Registration of a name/data pair in the name service.
- [2]
- Searching the name service for entries matching a glob pattern.
Beyond the above we also want to be able to identify the client, and get
information about the name service.
COMMAND LINE¶
- nns bind ?-host host? ?-port
port? name data
- This form registers the name/data pair in the specified name
service. In this form the command will not exit to keep the
registration alive. The user has to kill it explicitly, either by sending
a signal, or through the job-control facilities of the shell in use. It
will especially survive the loss of the connection to the name service and
reestablish the name/data pair when the connection is
restored.
The options to specify the name service will be explained later, in section
OPTIONS.
- nns search ?-host host? ?-port
port? ? -continuous? ?pattern?
- This form searches the specified name service for entries matching the
glob- pattern and prints them to stdout, with each entry on its own
line. If no pattern is specified it defaults to *, matching
everything.
The options to specify the name service will be explained later, in section
OPTIONS.
If the option -continuous is specified the client will not exit after
performing the search, but start to continuously monitor the service for
changes to the set of matching entries, appropriately updating the display
as changes arrive. In that form it will especially also survive the loss
of the connection to the name service and reestablish the search when the
connection is restored.
- nns ident ?-host host? ?-port
port?
- This form asks the specified name service for the version and features of
the name service protocol it supports and prints the results to stdout.
The options to specify the name service will be explained later, in section
OPTIONS.
- nns who
- This form prints name, version, and protocol version of the application to
stdout.
OPTIONS¶
This section describes all the options available to the user of the application
- -host name|ipaddress
- If this option is not specified it defaults to localhost. It
specifies the name or ip-address of the host the name service to talk to
is running on.
- -port number
- If this option is not specified it defaults to 38573. It specifies
the TCP port the name service to talk to is listening on for
requests.
BUGS, IDEAS, FEEDBACK¶
This document, and the package it describes, will undoubtedly contain bugs and
other problems. Please report such in the category
nameserv of the
Tcllib Trackers [
http://core.tcl.tk/tcllib/reportlist]. Please also
report any ideas for enhancements you may have for either package and/or
documentation.
SEE ALSO¶
nameserv(3tcl), nameserv::common(3tcl)
KEYWORDS¶
application, client, name service
CATEGORY¶
Networking
COPYRIGHT¶
Copyright (c) 2007-2008 Andreas Kupries <andreas_kupries@users.sourceforge.net>