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Date: Sat, 2 Aug 2008 18:51:09 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: perryh@pluto.rain.com
Message-ID: <20080802235109.GB93138@dan.emsphone.com>
References: <4894ef2e.2NiKL22MfAcdbs27%perryh@pluto.rain.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: undocumented tar --unlink switch
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In the last episode (Aug 02), perryh@pluto.rain.com said:
> Around line 37 of /usr/src/usr.sbin/pkg_install/add/extract.c
> there's an invocation of /usr/bin/tar with a --unlink switch,
> which I don't see mentioned in the tar(1) manpage.  Anyone
> happen to know what this does, or do I need to dig into the
> code?

That's just the longopts version of -U.  They're mainly for gnutar
compatibility, and the manpage refers to them at the very end:

     There are alternative long options for many of the short options
     that are deliberately not documented.


-- 
	Dan Nelson
	dnelson@allantgroup.com