Disable executing external commands from psql?

Hi.  I'm wondering if it is possible to disable use of  \! to execute
commands in psql?  I see this has come up on the list before
(http://archives.postgresql.org/pgsql-admin/2007-07/msg00242.php), but I
don't see anyone saying whether it is possible or not, just that it's a
bad or useless idea.

It may or may not be a bad idea (e.g., carry some risk).  My scenario is
that I'd like to give people that I don't necessarily know (or therefore
trust) the ability to run psql for a database I've already set up for
them.  I set their login shell to psql, so they can simply ssh in, and
they are in psql.  From there, though, they can do a simple \!
/bin/bash, and they've got way more access than I want them to.

So is there any way to disable the "\!" stuff?  If there's a better way
to go about this, I suppose I'm all ears too!

Thanks.

Ken Tanzer

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