Shell Programming and Scripting

I have files
a_cd_1.csv
a_cd_2.csv
a_cd_3.csv
I need to zip these files into one zip file a_cd.zip but if no data is there in any of these csv then only csv with data should be zipped.
Also these files will always have header record if data is present or not.
Please let me know how this scenario can be handled using unix script

You probably want to use the find command with -size +1c and pipe
that into tar, then gzip the tar file or just add the compress option to tar.

Is that a standard header with a standard length? If not, you need to count lines with e.g. wc -l and then go on like gandolf989 proposed.

Hi Rudic,

Yes it will be always standard header.
Eg:

a,b,c,d

I need to check the files whether it is having the data or not leaving the header and if those files has data then those files needs to zipped into one single file.

Please let me know.

Thanks,
Vinoth

You might want to use gandolf989's proposal but with -size +xc where x is the header's size. Or you might use stat -c%s, and when the result is larger than your header's size, add the file to the zip.

I tried both find and stat but its not working. It would be helpful if you can give the pesudo code so that I can try once.

Thanks.

What did you try with find? What did it do? How did it fail?

What did you try with stat? What did it do? How did it fail?

Your requirements are ambiguous. We may have a language barrier. If you show us sample files, we may be able to help you better.

Are you saying that a file should not be archived unless it contains more than 1 line? Or, are you saying that a file should not be archived unless it contains a correct header as its first line, and also contains data following the header?

How can we (or your script) determine whether or not the 1st line in a file is a "standard header"?