Re: [found the culprit]

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > I think this distinction (unpacking vs decompressing) is too subtle.

They don't seem even similar to me.  tar xf  and  gunzip  are not
at all similar in spirit.

  > That is, should Z on a zip archive just change its compression
  > mode to store, without extracting the files?

If there is such a thing as compression mode in a zip archive (I don't
know), that would make sense.

-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)