Libarchive is a programming library that can create and read several
different streaming archive formats, including most popular tar
variants and the POSIX cpio format.
WWW: http://people.freebsd.org/~kientzle/libarchive/
This code is present in -CURRENT but Tim currently has no intention of
MFC'ing it. The port will allow 4.x users to benefit from Tim's current
work and the tools he is building on top of it (bsdtar, libpkg).
Not objected to by: kientzle