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Top Forums Shell Programming and Scripting New Line or Not New Line, that is the question.
# 1  
Old 05-01-2009
New Line or Not New Line, that is the question.
Question:

What would be the best way to add a CR|\n|LF to the last line of a file if it doesn't have one and only if it doesn't have one?

Problem:

I get a text file in unix (HP-UX) and the last line gets ignored in processing because it does not have a CR or LF at the end of the line.

TIA,

Jody
# 2  
Old 05-01-2009
Code:
sed '${/^$/!a

}' filename > newfile


cheers,
Devaraj Takhellambam
# 3  
Old 05-01-2009
RE: New Line or Not New Line, That is the question.
Quote:
Originally Posted by devtakh
Code:
sed '${/^$/!a
 
}' filename > newfile


cheers,
Devaraj Takhellambam
I received the following error in SunOS:

sed: command garbled: ${/^$/!a

Sorry, did not work for me.
# 4  
Old 05-01-2009
Quote:
Originally Posted by Jodyman
I get a text file in unix (HP-UX) and the last line gets ignored in processing because it does not have a CR or LF at the end of the line.
If you are trying to process your file in Unix, shouldn't you want only LF at the end of each line ?

What characters do you have in the lines other than the last one ? Is it "CR+LF", only CR, or only LF ?

Do you want to make it consistent throughout the file ? If yes, then which one - "CR+LF", only CR, or only LF ?
I'd assume you want "only LF" throughout your file if it is to be processed in Unix, but I may be wrong.

tyler_durden

____________________________________________________
"Only after disaster can we be resurrected."
# 5  
Old 05-02-2009
Quote:
Originally Posted by Jodyman
I received the following error in SunOS:

sed: command garbled: ${/^$/!a

Sorry, did not work for me.
Did you leave a blank line in between
Code:
sed '${/^$/!a

and
Code:
}' filename > newfile

cheers,
Devaraj Takhellambam
# 6  
Old 05-03-2009
Quote:
Originally Posted by durden_tyler
If you are trying to process your file in Unix, shouldn't you want only LF at the end of each line ?

What characters do you have in the lines other than the last one ? Is it "CR+LF", only CR, or only LF ?

Do you want to make it consistent throughout the file ? If yes, then which one - "CR+LF", only CR, or only LF ?
I'd assume you want "only LF" throughout your file if it is to be processed in Unix, but I may be wrong.

tyler_durden

____________________________________________________
"Only after disaster can we be resurrected."
Right tyler, LF.


I'm only worried about the last line. I'm not sure in what environment the file was created in. So, if DOS, CR/LF, if UNIX/LINUX LF.

We've been able to use the following:

tail -1 filename | wc -l

If it returns a 1, leave it alone, if 0, append a LF. Is there a more elegant way?

Jody
# 7  
Old 05-03-2009
Quote:
Originally Posted by devtakh
Did you leave a blank line in between
Code:
sed '${/^$/!a

and
Code:
}' filename > newfile

cheers,
Devaraj Takhellambam

Thanks for the help Devaraj, the answer was "NO". I tried your solution in Linux and it indeed did append a LF but also appended a blank line which would cause a blank line to be processed.

Jody
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