-- <snip> --
> 
>> I look into this. And also in updating its comment and usage hint.
> 
> Attached is what i could come up with. It does not use zsh magic.
> Could be zsh'ified though. ;) Personally i happy with the result.
> Also attached is a shell script that creates a test env for sll().
> 
> I testet it as good as i could think of. Tell me what you think.

Here is a slightly improved version. Improved regarding return status.

> 
>>
>> Thanks!
>>
>> kind regards,
>>
>>      Thilo
>>
> 
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> <http://bts.grml.org/grml/issue1351>
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