Re: xz 5.0.3 (i386/NetBSD 5.0) strange "Unexpected end of input"

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Wed, Jun 27, 2012 at 01:45:26AM +0000, David Holland wrote:
> On Wed, Jun 27, 2012 at 12:54:41AM +0200, Joerg Sonnenberger wrote:
>  > > I noticed that I was seeing
>  > >  unxz: (stdin): Unexpected end of input
>  > > occasionally - I was running pkg_info from a context where it was
>  > > examining a whole directory of binpkg files, and this gave no idea
>  > > which file was (apparently) corrupt.
>  > 
>  > If I may guess, you are hitting no corruption, just an optimisation.
>  > pkg_info just reads enough from the package to get the meta data.
>  > When libarchive is *not* built against liblzma, it calls unxz as
>  > external filter, pushing data as needed. Depending on how fast the
>  > extraction happens, unxz hits the closed stdout or closed stdin first.
>  > I'm not aware of a clean way to signal this.
> 
> Um? Close its stdin, wait for it, then close its stdout? Or signal it
> and not close either?

Closing stdin is what leads to the message. You really don't want to
extract a 100MB binary package, if all you are interested in is the
first few KB.

Joerg