[ic] Purging session/ and tmp/ - expireall, or rm?

[Mike Heins]

Quoting ICdev (interchange.mail at virgin.net):
> Hey,
> 
> I'm not quite clear on which method I should use in crontab to clear the 
> contents of the 'session' and 'tmp' directories.
> 
> In the icadvanced document, it says that if you're using DBM sessions, you 
> should use expireall. I am using standard session files, but having searched 
> the archives, people seem to be using expireall or plain old rm arbitrarily, 
> or even both, one after the other!
> 
> So, which of the following should I use?:
> 
> 20 4 * * * su -c "/usr/lib/interchange/bin/expireall -r" interch
> 
> or
> 
> 20 4 * * * find /var/lib/interchange/store_name/session -type f -mtime +2 | 
> xargs rm -fv
> 20 4 * * * find /var/lib/interchange/store_name/tmp -type f -mtime +2 | xargs 
> rm -fv
> 
> , or doesn't it matter? Shouldn't the parent directories of the session files 
> be deleted too?
> 
> I tried expireall manually - it took its time executing, but didn't seem to 
> have any affect on the stuff in session and tmp; I'm guessing that's because 
> it's less than a day old.
> 
> *Finally*, what if someone is placing an order just as their session files are 
> deleted with rm?

I use a very simple little script I call clean_session_tmp to do it:

#!/bin/sh

for DIR in $*
do
        for i in session tmp
        do
            if test -d $DIR/$i 
            then
                find $DIR/$i -type f -mmin +480 | xargs --no-run-if-empty rm
                find $DIR/$i -type d -empty -depth -mindepth 1 | xargs --no-run-if-empty rmdir
            else
                echo "$0: $DIR/$i doesn't exist."
            fi
        done
done

The 480 is 8 hours. You can change the number to what you want.

It is called in cron:

22 4 * * * /usr/local/interchange/bin/clean_session_tmp /home/*/catalogs/*


-- 
Mike Heins
Perusion -- Expert Interchange Consulting    http://www.perusion.com/
phone +1.765.647.1295      <mike at perusion.com>

Function in chaos, finish in style. -- Unknown