Re: [gentoo-server] simple shell script

[Ben Munat]

Yeah, running sa-learn on an empty directory is fine, but it bugs me that when I then run 
rm on the contents of that directory, I get an error message. I know it doesn't hurt 
anything... it just bugs me. I thought it would be trivial to put the calls to "sa-learn" 
and "rm" in an if statement, but I guess I was wrong.

b


Christian Bricart wrote:
> Ben Munat schrieb:
>
>> Argh. I've been trying to come up with what should be a simple bash
>> script, but I just can't seem to get it right.
>>
>> I'm trying to fix up my cron script that runs sa-learn. I want it to
>> check to see if there's actually any mails in the directory before
>> running "sa-learn <my options> <my missed spam dir>" and then "rm <my
>> missed spam dir>/*".
>
>
> Actually, this is not a valid answer to your question - but as in the
> "Hitchhkers Guide through the Galaxy": "Maybe your question has been all
> wrong" ;-)
>
> Why do you want to check if the directioy is empty at all? Just call
> "sa-learn" either in loop on every file in the directory. If it's emty
> it's not executed at all.
> On the other hand, you can call "sa-learn" on an empty directory and
> you'll get "Learned from 0 messages".
>
> find /the/path/to/your/directory/ -type f -print0 | xargs -0 \
> sa-learn <your options>
>
>>
>> I've gone in circles with using the "-e" test ("if [ -e $mydir'/*' ]")
>> and just command success ("if `ls $mydirwithslashstar`", etc.) and I
>> can't seem to get it right. What's the simplest way to just test if a
>> directory is empty?
>
>
> that would be something like:
>
> if [ `ls -l /path/to/directory | wc -l` -eq 0 ]; then
> ...
> fi
>
> (not tested though)
>
> Christian
>
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