Shell Programming and Scripting

Hi All,

My requirement is to remove the carriage return in from the lines which i am reading if the length is lesser than 1330 and append the next line with it. Below is the realistic example of file structure.
Input file:

Code:

Blah blah blah blah Blah blah blah blah
Blah blah blah blah Blah blah blah blah
Blah blah blah blah Blah
blah blah blah
Blah blah blah blah Blah blah blah blah

Output file:

Code:

Blah blah blah blah Blah blah blah blah
Blah blah blah blah Blah blah blah blah
Blah blah blah blah Blah blah blah blah
Blah blah blah blah Blah blah blah blah

With adding a single space in front of the 4th line i want to append it to 3rd line in input file.

I know how to do this with WHILE - DO - DONE loop but it works only well for small files. For huge files it will lead into performance issue.

So i would like to do this in AWK or SED command. Requesting your help.

Thanks.

---------- Post updated at 08:04 PM ---------- Previous update was at 08:02 PM ----------

Note I am using AIX 6.0 flavor of UNIX system.

You're talking of <newline> chars, not <carriage return>?

Try

Code:

awk  '{while (length < 1330 && getline s>0) $0=$0 " " s}1'  file

Hello mad man,

Could you please try following and let me know if this helps you.

Code:

awk '{gsub(/\r/,X,$0);if(length($0)<1330){Q=Q?Q OFS $0:$0};if(length($0)>1330){if(Q){print Q;Q=""};print}}'   Input_file

Thanks,
R. Singh

Hi Rudi C,

I tried your solution But it made to append the impacted line's before and after lines are also to get append behind their previous lines

---------- Post updated at 08:34 PM ---------- Previous update was at 08:31 PM ----------

Hi I tried this it does not produced any output.

Hello mad man,

Not sure but the Input_file which you have shown doesn't have any line whose length is more than 1330, so if you are using same Input_file I don't think so it will show any output. You could confirm by doing following too.

Code:

awk '{print length($0)}' Input_file

In case no line is having more than 1330 length then you could change the length into above code.

Thanks,
R. Singh

What be the actual lengths of your lines?

@ Ravinder singh

i executed the last command and got 1329 as maximum value in the file.
i edited the command you have given replacing all 1330 with 1329 still no luck.
Thanks

---------- Post updated at 11:57 PM ---------- Previous update was at 11:56 PM ----------

@RudiC hope my last post would have answered you too.