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nns - Online in the Cloud

Run nns in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command nns that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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.

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