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Old 08-25-2008, 02:34 PM   #1
Geneset
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Reformatting IP address


Hi guys, me again,

I'll make this short

Whos magic with regex's and sed?

I am getting heading 0's from the ip routing table on my router, eg

0xx.00x.xxx.00x

I'm imagining something with sed wud be perfect but i cant get the right expression to match

I'm thinking s/\.0*/./ but it isnt working.


Ideas? Cheers
 
Old 08-25-2008, 02:50 PM   #2
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Quote:
Originally Posted by Geneset View Post
Hi guys, me again,

I'll make this short

Whos magic with regex's and sed?
I am getting heading 0's from the ip routing table on my router, eg
0xx.00x.xxx.00x

I'm imagining something with sed wud be perfect but i cant get the right expression to match
I'm thinking s/\.0*/./ but it isnt working.
Ideas? Cheers
How about more information?? How do you want it formatted? What are you trying to do?
 
Old 08-25-2008, 02:59 PM   #3
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get rid of the 0's as they are not recognised by any other tools, eg.

if an ipaddress being accessed is 10.1.1.1, i would read from this source 010.001.001.001, and i want to turn that back into 10.1.1.1

make more sense now?

I want to remove any zeros that immediatly follow a decimal or are at the very beginning of the line.
 
Old 08-25-2008, 03:50 PM   #4
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sed -e 's/[0]*\([0-9]*\)\.[0]*\([0-9]*\)\.[0]*\([0-9]*\)\.[0]*\([0-9]*\)/\1.\2.\3.\4/g' <text_file_with_ip_addys> | sed -e 's/\.\./\.0\./'

Ugly as sin, but it works...heh

This would be insanely easy with a Python script, by the way...

Last edited by rocket357; 08-25-2008 at 03:55 PM.
 
Old 08-25-2008, 05:05 PM   #5
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I could live with python...

Go on....
 
Old 08-25-2008, 05:49 PM   #6
rocket357
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Code:
#!/usr/bin/env python

def fix_ip(ip):
    octets = ip.split('.')
    for octet in octets:
        octet = octet.lstrip('0')
    return '.'.join(octets)
You'd have to write code to utilize this function, but at a bare minimum that's what it'd take.
 
Old 08-25-2008, 05:56 PM   #7
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Simple, Elegant, I like it *steals*

Thanks for all the help guys
 
Old 08-26-2008, 12:53 AM   #8
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This uses GNU sed to delete one or two 0's after a word boundary:-
Code:
echo 011.100.000.001 | sed 's/\b00\?//g'
11.100.0.1
 
Old 08-26-2008, 12:55 AM   #9
rocket357
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Quote:
Originally Posted by Kenhelm View Post
This uses GNU sed to delete one or two 0's after a word boundary:-
Code:
echo 011.100.000.001 | sed 's/\b00\?//g'
11.100.0.1
very nice...thanks for sharing.
 
  


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