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From: davids@mondo.engin.umich.edu (David Snearline)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Disabling the trashcan
Message-ID: <1991May8.163306.17667@engin.umich.edu>
Date: 8 May 91 16:33:06 GMT
References: <1991May8.014221.1@hmcvax.claremont.edu> <1991May8.142845.16194@umbc3.umbc.edu>
Sender: davids@mondo.engin.umich.edu (David Snearline)
Organization: University of Michigan Engineering
Lines: 19

An alternative method to disabling the trash can would be to "soft lock"
the hard disk volume.  This entails setting bit 15 of the volume attrbiutes
flag and requires direct disk driver calls.  (Or at least to unset the
flag.)  This is fairly equivalent to placing a big write protect switch
on the drive.

There are drawbacks to this approach though.  First, it does mean that
nothing can be deleted at all until you "unlock" the volume.  Second,
certain applications and desk accessories choke on a write protected
boot volume.  The Chooser DA is a good example of this.  So this is more
of a last resort method.

--- Dave ---


--
David Snearline
CAEN Network Operations
University of Michigan Engineering