Csv to xls

Hello
I have a script which converts log to csv.
Now I need to have xls.
Is there any easy way/command which can convert csv to xls?:confused:
preferably just using bash and not perl,... is it possible?

Perl or PHP are the easy way. Maybe there are other 3rd party tools out there that can do this, but if you want to use pure bash you'd have to build a file following the Excel Binary File Format Specification that can be found here. Reading und understanding that 48MB pdf-document is not what I call an easy way...

Edit: Phyton seems to be able to handle excel files to.