Sensing dynamic network address.

For my own nefarious purposes I would like to set up a routine that sniffs
out the current address assigned by my cable host to my computer. I know it
changes every few hours.

Netstat, ifconfig etc. give me the information but they give me too much
information. All I want back is a one liner that contains the ip address,
for further processing. I can write a program that plows through an
ifconfig or netstat reply but I'd rather not. Any quick hints?
--
John Culleton
Able Indexers and Typesetters

On Thu, 10 Feb 2005 18:48:14 -0500, John Culleton wrote:

> For my own nefarious purposes I would like to set up a routine that sniffs
> out the current address assigned by my cable host to my computer. I know it
> changes every few hours.
>
> Netstat, ifconfig etc. give me the information but they give me too much
> information. All I want back is a one liner that contains the ip address,
> for further processing. I can write a program that plows through an
> ifconfig or netstat reply but I'd rather not. Any quick hints?

INTERNET_IPADDR=`ifconfig eth0 | grep inet | cut -d : -f 2 | cut -d ' ' -f
1`

John Culleton <(E-Mail Removed)> wrote:
> Netstat, ifconfig etc. give me the information but they give me too much
> information. All I want back is a one liner that contains the ip address,

ifconfig eth0 | sed -n 's/^.*inet addr:\([0-9.]*\).*/\1/p'

Chris

chris-(E-Mail Removed) wrote:

> John Culleton <(E-Mail Removed)> wrote:
>> Netstat, ifconfig etc. give me the information but they give me too much
>> information. All I want back is a one liner that contains the ip address,
>
> ifconfig eth0 | sed -n 's/^.*inet addr:\([0-9.]*\).*/\1/p'
>
> Chris

Beautiful! Thanks to both who replied.
--
John Culleton
Able Indexers and Typesetters