#2232 Incomplete tar file support: posix format not recognized

[Ben M]

Hello,

7zip has incomplete tar file support.
I tried to open a tar file with the "posix format" and very long file names (names > 100). 7zip will cap the file names to 100 chars (fallback).

This does not happen when such a file was packed using tar --format=gnu. Since ~2013, tar will default to tar --format=posix. The posix format came around in 2001.

You can read the description of the formats here:
https://www.gnu.org/software/tar/manual/html_chapter/tar_8.html

This is the implementation detail:
https://www.gnu.org/software/tar/manual/html_node/Standard.html

Would it be possible to fix this bug? I consider this a bug, because this is unexpected behaviour and 7z does not warn about it.

Thank you very much!

[Igor Pavlov]

it's not a bug.
It's missing of feature.

[Ben M]

Thanks! Well, I can understand that this is a missing feature, as it is just another format. Not implementing it will make it fall back to the oldest TAR format there is.

Do you need a reproducible example?
Is there a possibility to send donations? :)

[TheOneRing]

I think the whole release of http://download.qt.io/official_releases/qt/5.14/5.14.0/submodules/ might be affected, so lots of examples.