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Title: TarFile.getmember cannot work on tar sourced directory over 100 characters
Type: behavior Stage:
Components: Library (Lib) Versions: Python 3.11, Python 3.10, Python 3.9
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: andrei.avk, cfernald, ethan.furman, r.david.murray, serhiy.storchaka
Priority: normal Keywords:

Created on 2022-04-05 18:15 by cfernald, last changed 2022-04-11 14:59 by admin.

File name Uploaded Description Edit cfernald, 2022-04-05 18:15 Example of tarfile bug using arm gcc compiler tarfile
Messages (2)
msg416793 - (view) Author: Chris Fernald (cfernald) * Date: 2022-04-05 18:15
A fix was made to unify handling of the trailing slash in TarFile.getmember related to This change fixed the <100 character case, but made it so directories over 100 character which come from a tar file can no longer be accessed through getmember, even if returned from getnames. This appears to be because internal to tarfile, member names still include the trailing slash on directories over 100 characters but getmember will always remove the trailing slash from the provided name so the comparison will always fail.

A simple example of this is as follows using 3.10.4.

1. Download:

2. place attached python script in same directory

3. run on 3.8.2 -> fails to get stripped version of path (line 16)

4. run on 3.10.4 -> fails to get even unstripped version (line 12 & 16)
msg416796 - (view) Author: Ethan Furman (ethan.furman) * (Python committer) Date: 2022-04-05 18:24
Nosied others from issue21987.
Date User Action Args
2022-04-11 14:59:58adminsetgithub: 91387
2022-04-05 22:06:10vstinnersetnosy: - vstinner
2022-04-05 18:24:16ethan.furmansetnosy: + vstinner, r.david.murray, ethan.furman, andrei.avk
messages: + msg416796
2022-04-05 18:15:20cfernaldcreate