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Date: Sun, 19 Jun 2005 23:03:12 -0700
From: Tim Kientzle <tim@kientzle.com>
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To: Peter Jeremy <PeterJeremy@optushome.com.au>
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Cc: Tim Kientzle <kientzle@freebsd.org>, freebsd-current@freebsd.org
Subject: Re: Replace /rescue/vi with mined(1) from DragonFlyBSD
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Peter Jeremy wrote:
> On Sun, 2005-Jun-19 12:00:12 -0700, Tim Kientzle wrote:
> 
>>Peter Jeremy wrote:
>>
>>>According to tar(1) and libarchive-formats(3), yes it read anything that
>>>pax can.  (It can't write cpio but I don't see that as a requirement in
>>>/rescue).
>>
>>Yes, it can write cpio.  (Posix octet-oriented cpio format, also called 
>>'odc cpio'  Other variants are easy to add if there's demand.)
> 
> 
> libarchive-formats(3) states:
>    Tar Formats
>      The libarchive(3) library can read most tar archives.  However, it only
>      writes POSIX-standard ``ustar'' and ``pax interchange'' formats.
> 
> But tar(1) does state it can write cpio.  I skipped from tar(1) to
> libarchive-formats(3) too quickly and missed that, sorry.
> 
> I think that just strengthens my argument that having pax in /rescue
> is redundant, superfluous and unnecessary :-).
> 

libarchive-formats(3) also states:

Cpio Formats
   The libarchive library can read a number of common
   cpio variants and can write ``odc'' format archives.

Separate sections detail support for Shar, ISO9660, and Zip formats,
as well.  ;-)

Tim