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Date: Thu, 15 Nov 2007 23:05:20 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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Subject: Variant behaviour from truncate over NFS and UFS
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I came across the following variant behaviour.  On NFS:

hydra1# cd /nfs
hydra1# touch foo
hydra1# chmod a-w foo
hydra1# ls -l foo
-r--r--r--  1 4294967294  wheel  0 Nov 15 21:57 foo
hydra1# truncate -s 0 foo
truncate: foo: Permission denied
hydra1# chmod u+w foo
hydra1# truncate -s 0 foo

Compare to UFS:

hydra1# cd /tmp
hydra1# touch foo
hydra1# chmod a-w foo
hydra1# truncate -s 0 foo
hydra1# ls -l foo
-r--r--r--  1 root  wheel  0 Nov 15 21:57 foo

Which is correct?

Kris