IRIX 3.2: new directory blocks not zeroed?

[Ken Lalonde]

Unused space in newly created directories under IRIX 3.2 appears to
contain data leftover from recently removed files.  When I run the
following a few times on two of our 4D machines and one PI (all with
/tmp on the root SCSI disk), the "cat -v foo" prints part of the passwd file.

	% cd /tmp
	% cp /etc/passwd .		# any large text file will do
	% rm passwd
	% mkdir foo
	% cat -v foo

Bad news if you care about filesystem security.