run a system command from a mysql query ?

hi !

strugling with mod_quotatab for proftpd, i have imagined a solution consisting of running a system command in a mysql query.
Such as "update some_table set directory_size='`du -ks /path/to/somedir/`'"

is there some way to do this  ?

Michael

PS : this MUST consist of one (or several) mysql queries

my question about mod_quotatab was here : http://www.experts-exchange.com/Operating_Systems/Linux/Q_21221788.html

safarlebusAsked:
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hernst42Commented:
AFAIK there is no way to do such a thing in the SQL-Statement directly for mysql.
You can use other script-language (shell, php) to execute that command, get the result and then execute that query with the given result, but in plain SQL it is not supported.

Oracle has such an ability (http://www.akadia.com/services/ora_extproc_nt.html), but mysql AFAIK not.
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SqueebeeCommented:
I can tell you right now that this cannot be done. Sorry, but hernst42 is correct, you will have to depend on an external programming or scripting language.
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