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Unix scripting: need last  (or second last) line before each blank line

Posted on 2010-09-16
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Last Modified: 2012-05-10
Hello again (where would I be without you).

In a file I need last line before each blank, unless last line has regex HOLD in it, then I would need the second last line. See attached screenshot.
Bottomline, I need lines with last runtime of each job.

Thanks for your help.
conman.jpg
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Question by:Watnog
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5 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 33690186
perl -ne '/\w/||print $l;/HOLD/||($l=$_)' file
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Author Comment

by:Watnog
ID: 33690470
Thanks, that's great.
I discover that what I thought to be blank lines fact aren't,  :-~
They would become if I can get rid of the last 2 columns, see attached.
That would make your oneliner work as intended.
Cheers.



conman1.jpg
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Author Comment

by:Watnog
ID: 33690480
Last 2 columns that is 'Returncode' and 'Dependencies'.
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LVL 84

Accepted Solution

by:
ozo earned 1200 total points
ID: 33690540
This treats lines with more than 2 columns as non-blank
perl -ane '@F>2||print $l;/HOLD/||($l=$_)' file
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Author Closing Comment

by:Watnog
ID: 33691002
Wonderful.
Thx.
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