Re: Adding support for LZIP to dpkg, using that instead of xz, archive wide

[Antonio Diaz Diaz <antonio@gnu.org>]

Nicholas Breen wrote:
> > If there is just the excrement of a fly adhered to a corner of the
> > envelope (a null byte appended to an otherwise intact file, for
> > example), xz will report that the data is corrupt and will not
> > deliver the message. This test is inescapable.
>                        ^^^^^^^^^^^^^^^^^^^^^^^^
>
> > From xz(1):
>        --single-stream
>               Decompress only the first .xz stream, and silently ignore pos-
>               sible  remaining  input  data  following the stream.

Just try this command:

  xz -d --single-stream file_with_many_streams_and_null_byte.xz

Xz decompresses the first stream in the file, then deletes the file, and 
finally exits with 0 status.

I was wrong. In some cases the "Compressed data is corrupt" message can 
be silenced... at the cost of silent massive data loss.


Best regards,
Antonio.