[ale] scripting challenge du'jour

[Richard Kolkovich]

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On 07/06/06 11:59, Joe Steele declared:
> Richard Kolkovich wrote:
>> On 07/05/06 19:19, Jim Popovitch published:
>>> What's the fastest, cleanest, most optimized, shell script (non perl,
>>> etc) method to take the output of ifconfig and produce a list that
>>> resembles this:
>>>
>>> 192.168.4.5/255.255.255.0    192.168.4.255
>>> 172.16.8.12/255.255.0.0        172.16.255.255
>>>
>>>
>>> Go!
>>>
>>> -Jim P.  (TIA ;-))
>>
>> ifconfig | grep inet\  | sed -e 's/:/\ /g' | sed -e '/127.0.0.1/d' | awk
>> - -F\  '{print $3"/"$7"\t\t"$5}'
>>
> 
> Would it not be more efficient to use sed only once and avoid the grep
> and awk?

Ahh...yes.  Probably.  ;)  I will be the first to admit, though, that my
sed knowledge is very minimal.  I know how to do a few things with it,
and this fit within the realm of that knowledge.  awk&sed are tops on my
list to delve into after tonight (end of summer semester!).

An elegant solution, though.

> 
> ifconfig | sed -n "/inet /s/\
> .*:\([^ ]*\)\
> .*:\([^ ]*\)\
> .*:\([^ ]*\)\
> /\1\/\3\t\2/p"
> 
> --Joe
> 

- --

Richard Kolkovich
sarumont at sigil.org


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