bin/42166: pax from NetBSD 5.0.1 cannot extract pkgsrc-2009Q2.tar.gz correctly

[heinz%NetBSD.org@localhost]

>Number:         42166
>Category:       bin
>Synopsis:       pax from NetBSD 5.0.1 cannot extract pkgsrc-2009Q2.tar.gz 
>correctly
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 09 17:25:00 +0000 2009
>Originator:     Klaus Heinz
>Release:        NetBSD 5.0.1 (GENERIC) sparc64
>Organization:
>Environment:
NetBSD Amnesiac 5.0.1 NetBSD 5.0.1 (GENERIC) #0: Thu Jul 30 00:02:58 UTC 2009  
builds%b7.netbsd.org@localhost:/home/builds/ab/netbsd-5-0-1-RELEASE/sparc64/200907292356Z-obj/home/builds/ab/netbsd-5-0-1-RELEASE/src/sys/arch/sparc64/compile/GENERIC
 sparc64
>Description:
On NetBSD/sparc64 5.0.1 pax reports problems about unknown file type
and GNU extensions while extracting pkgsrc-2009Q2.tar.gz.

A diff between the resulting directory and a directory extracted with
GNU tar shows

  # diff -ur pkgsrc-pax pkgsrc-gtar
  Only in pkgsrc-pax/archivers/libarchive/files/libarchive/test: 
test_read_format_gtar_sparse_1_17_posix10_modifie
  Only in pkgsrc-gtar/archivers/libarchive/files/libarchive/test: 
test_read_format_gtar_sparse_1_17_posix10_modified.tar.uu

>How-To-Repeat:
- download pkgsrc-2009Q2.tar.gz
- use pax on NetBSD/sparc64 5.0.1
  # pax -zrf pkgsrc-2009Q2.tar.gz 
  pax: Trying to read GNU tar archive with GNU extensions and end-of-volume 
checks off
  pax: GNU Long File found in posix ustar archive.
  pax:  has an unknown file type, skipping
  pax: Invalid header, starting valid header search.

>Fix: