Deletion of last Empty paragraph


 
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# 1  
Old 08-04-2011
Deletion of last Empty paragraph

Hello,

I hava a file resulting from a script which ends as follows:

Code:
 
172|18|FOOTER|DISCLOSURE||16
173|0|FOOTER|FILE||18

note the paragraph signs are only placed to demonstrate the problem

I want it to return the same last lines but without the last empty paragraph i.e:

Code:
 
172|18|FOOTER|DISCLOSURE||16
173|0|FOOTER|FILE||18

What i need is no empty line at the end of the file

I tried all the following but they either did nothing or deleted the last line instead of the last empty line.

Code:
 
sed '/^$/N;/\n$/D'
sed -e :a -e '/^\n*$/{$d;N;ba' -e '}'
sed '$d'
sed '/^$/d' 
sed '/./!d'

any help would be much appreciated
# 2  
Old 08-04-2011
AFAIK, according POSIX standard this is not a text file. You can get some problems working with it (for example "cat THISFILE | while read line; do echo $line; done" wouldn't emit the last line).
Code:
172|18|FOOTER|DISCLOSURE||16
173|0|FOOTER|FILE||18

This one is:
Code:
172|18|FOOTER|DISCLOSURE||16
173|0|FOOTER|FILE||18

And only this has the empty last line:
Code:
172|18|FOOTER|DISCLOSURE||16
173|0|FOOTER|FILE||18

This User Gave Thanks to yazu For This Post:
# 3  
Old 08-04-2011
Hi,

Try next command:
Code:
$ perl -pe 'chomp if eof' infile

Regards,
Birei
This User Gave Thanks to birei For This Post:
# 4  
Old 08-04-2011
Thank you for your replies. The perl script worked like a charm. Thank you very much
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