tree 05b55cdeb6240cf1db0db6cb21c82ba315787b4a
parent d3e5632ddaa81eba0ff7c43a1530c47b04854a92
author Mike Frysinger <vapier@chromium.org> 1513842821 -0500
committer Mike Frysinger <vapier@chromium.org> 1556967721 +0000

normalize archive paths

Some archive formats allow names to include "./" prefixes.  These confuse
the FSP layer and make it list a "." directory.  Attempting to descend it
though fail as the FSP layer requests "./" which libarchive returns which
is the same directory it was already in.

Lets change the unpacker layer to just skip any leading ./ components it
comes across.  The FSP layer can then display it fine while the libarchive
layer knows how to look up the path even with the ./ omitted.

An example using a tar file:
$ touch foo
$ tar cf foo.tar ./foo
Opening it in the FSP layer shows a hidden "." directory, and going into
it leads to an infinite ./././././ chain that never reaches "foo".

We can also confuse it with runs of // or /./ in dirpaths, so normalize
those too.

Bug: https://github.com/vapier/chrome-ext-wicked-good-unarchiver/issues/7
Change-Id: Ieefd9a769dd840b1029e5c1d773db2eec1cc74ca
Reviewed-on: https://chromium-review.googlesource.com/c/apps/unpacker/+/838627
Reviewed-by: Joel Hockey <joelhockey@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>