[RndTbl] Command line challenge: trim garbage from start and end of a file.

[Sean Walberg]

OTTOMH:

perl -n -e 'BEGIN {$state = 0} $state = 1 if ($state == 0 and /output
start/); $state = 2 if ($state == 1 and /output end/)  ; print if ($state ==
1)' < infile > outfile

I'll bet there's a shorter AWK version though.

Sean

On Wed, Nov 10, 2010 at 10:51 AM, John Lange <john at johnlange.ca> wrote:

> I have files with the following structure:
>
> garbage
> garbage
> garbage
> output start
> .. good data
> .. good data
> .. good data
> .. good data
> output end
> garbage
> garbage
> garbage
>
> How can I extract the good data from the file trimming the garbage
> from the beginning and end?
>
> The following works just fine but it's dirty because I don't like the
> fact that I have to pick an arbitrarily large number for the "before"
> and "after" values.
>
> grep -A 999999 "output start" <infile> | grep -B 999999 "output end" >
> newfile
>
> Can anyone come up with something more elegant?
>
> --
> John Lange
> www.johnlange.ca
> _______________________________________________
> Roundtable mailing list
> Roundtable at muug.mb.ca
> http://www.muug.mb.ca/mailman/listinfo/roundtable
>



-- 
Sean Walberg <sean at ertw.com>    http://ertw.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.muug.mb.ca/pipermail/roundtable/attachments/20101110/04428de6/attachment.html