Unmount disk image at logout

Question

Account Preferences->Login items allows you to list disk images to mount on login, but these disk images do not get unmounted at logout - they can still be seen by other accounts.
Is there any way to force the Login items disk images to be unmounted when an account logs out?

Answer 1

Phill Hughes wrote:
Fine with scripting, but if the users have to remember to click something before logging out then they just as well eject the disk images. A cron job would work, but it would be nice to just have it happen. Thanks for the suggestions.
cron won't be good for this unless you want to run it every minute. I would use a logout hook
http://support.apple.com/kb/HT2420?viewlocale=en_US
so it's only executed on the logout. it can run an apple script along the following lines
<pre style="
font-family: Monaco, 'Courier New', Courier, monospace;
font-size: 10px;
margin: 0px;
padding: 5px;
border: 1px solid #000000;
width: 720px;
color: #000000;
background-color: #ADD8E6;
overflow: auto;"
title="this text can be pasted into the Script Editor">
tell application "Finder"
set nmd to number of disks
--this ejects externals and disk images
if nmd > 1 then
repeat with i from 2 to nmd
eject disk (nmd - i + 2)
end repeat
end if
end tell</pre>
this will unmount all externals and disk images when a user logs out.