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From: Mark Martinec <Mark.Martinec+freebsd@ijs.si>
To: freebsd-fs@freebsd.org
Date: Fri, 4 Mar 2011 12:37:43 +0100
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Message-Id: <201103041237.44240.Mark.Martinec+freebsd@ijs.si>
Subject: ftruncate under ZFS incorrectly checks permissions
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Any takers for the:

  http://www.freebsd.org/cgi/query-pr.cgi?pr=154873

?

Summary:
  ftruncate under ZFS requires W file access permission,
  instead of testing file open mode (O_RDWR),
  (violating POSIX.1-2008 and breaking Postfix mailer)

(FreeBSD 8.2, ZFS: pool version 15, ZFS version 4, and earlier)

  Mark