netmask in a script

[Dazed_75]

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 at 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
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