[ale] SED question

[Greg Freemyer]

Thanks,

We ended up modifiying a C program we had to do the job, so we are good for now.

But I'm going to study what you have below.  It looks really clean and
if this comes up again we have this as a guideline.

I can also use it to double check our work and see that it does the
same thing as the below.

Thanks again.
Greg

On Wed, Sep 16, 2009 at 3:19 PM,  <tpike at teepee-sw.com> wrote:
> Sed doesn't really have fields in the sense you suggest.  Here's how I
> would do your two step process.
>
> Validation:
> egrep -l -v '[^~]{1,}~[^~]{1,}~[^~]{1,}~BHT'
>
> That will list files that are incorrect.
>
> Then to add the filename:
>
> ls input.* | while read fn ; do
>   sed -i -e "s/\\(BHT[^~][^~]*\\)~/\\1*$fn~/" $fn
> done
>
> Substitute a for loop or find, etc for your file list as appropriate.
>
>> All,
>>
>> I have not worked much with sed.
>>
>> Does it have the ability to use a non-standard record and field
>> separators?
>>
>> ie.  I have about 5000 files that use ~ as the record separator and *
>> as the field separator, not <newline> and , or whatever.
>>
>> If it can my goal is two fold.
>>
>> First have verification script that verifies all 5000 files start
>> their 4th record with BHT.  (ie. The file is
>> "aaaa~bbbb~cccc~BHTaaaa~..."
>>
>> And then a separate script to append the files filename as a field to
>> the 4th record (ie. Add *$filename to the forth record).
>>
>>
>> Thanks
>> Greg
>> --
>> Greg Freemyer
>> Head of EDD Tape Extraction and Processing team
>> Litigation Triage Solutions Specialist
>> http://www.linkedin.com/in/gregfreemyer
>> Preservation and Forensic processing of Exchange Repositories White Paper
>> -
>> <http://www.norcrossgroup.com/forms/whitepapers/tng_whitepaper_fpe.html>
>>
>> The Norcross Group
>> The Intersection of Evidence & Technology
>> http://www.norcrossgroup.com
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>>
>
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-- 
Greg Freemyer
Head of EDD Tape Extraction and Processing team
Litigation Triage Solutions Specialist
http://www.linkedin.com/in/gregfreemyer
Preservation and Forensic processing of Exchange Repositories White Paper -
<http://www.norcrossgroup.com/forms/whitepapers/tng_whitepaper_fpe.html>

The Norcross Group
The Intersection of Evidence & Technology
http://www.norcrossgroup.com