Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!umd5!decuac!felix!zemon
From: mkhaw@teknowledge-vaxc.ARPA (Mike Khaw)
Newsgroups: comp.unix.ultrix
Subject: another 2.2 gotcha
Message-ID: <33343@felix.UUCP>
Date: 4 May 88 00:24:31 GMT
Sender: zemon@felix.UUCP
Reply-To: mkhaw@teknowledge-vaxc.ARPA (Mike Khaw)
Organization: Teknowledge, Inc., Palo Alto CA
Lines: 27
Approved: zemon@felix.UUCP
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Under ultrix 1.2 (and other 4bsd Unixes, as well as HP-UX and NCR SysV),

	tar cf - /usr/myhome/subdir/myfile | tar tf -

would produce

	/usr/myhome/subdir/myfile

Under ultrix 2.2, you get

	/usr/
	/usr/myhome/
	/usr/myhome/subdir/myfile

We've been using tar to "archive" user files where the archiving utility
will read back the tar tape and then delete the on-disk copies of what's
been copied to tape (i.e., the names that "tar t" returns).

Well, you can see how the way the 2.2 version of tar works becomes a
problem.  We nearly lost our /usr subtree.  I certainly don't recall
seeing any mention of this change to tar's behavior in the Release
Notes, nor is it prominently noted (if at all) in the man file.

Mike Khaw
-- 
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