On Thu, Oct 27, 2011 at 11:13 AM, Eric Shubert <ejs@shubes.net> wrote:

Brian's ipcalc looks like it might simplify things a bit. Nice.

On 10/27/2011 10:57 AM, Dazed_75 wrote:

Thanks Eric. Those are what I was going to use before I had the thought
that someone might know of an already built function I could use rather
than me taking the IP and netmask apart, applying those, and
reassembling the IPrange. I suppose I've already wasted more time than
I would have saved. :)

On Thu, Oct 27, 2011 at 10:28 AM, Eric Shubert <ejs@shubes.net
<mailto:ejs@shubes.net>> wrote:

On 10/26/2011 09:49 PM, Dazed_75 wrote:

I would like to apply a netmask to an arbitrary IP in a
bash/dash script
(e.g. apply 255.255.255.0 to 173.10.3.155 to get 173.10.3.0).
Is there
any easy way to do that without taking the IP apart, doing 4
operations
and reassembling the results?

--
Dazed_75 a.k.a. Larry

The spirit of resistance to government is so valuable on certain
occasions, that I wish it always to be kept alive.
- Thomas Jefferson

http://tldp.org/LDP/abs/html/__ops.html

<http://tldp.org/LDP/abs/html/ops.html>
See "bitwise operators" about half way down the page. I think that's
what you're looking for.

--
-Eric 'shubes'

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--
Dazed_75 a.k.a. Larry

The spirit of resistance to government is so valuable on certain
occasions, that I wish it always to be kept alive.
- Thomas Jefferson

--
-Eric 'shubes'

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