Cannot unlink problem

[Laurent Mélon]

Hello,

I found this strange behaviour when trying to "untar" the attached file 
(xx.tar) :

        /home/melon> tar -xvf xx.tar 
        xx/
        xx/ns.ps
        tar: xx/ns.ps: Cannot unlink: Permission denied
        tar: Error exit delayed from previous errors
        /home/melon> 

the version is : tar (GNU tar) 1.13.18 (supplied with the SuSE Linux 7.2).

doing a "strace" on the command show that "tar" :
        
        1) create the directory xx
        2) create the file ns.ps (of size 0)
        3) applies the permissions to the xx directory (500)
        4) somehow realize that in fact ns.ps was not a file but a symlink so 
tries     
        to "unlink" it which of course according to the xx directory 
permissions is     
        not allowed.

is there a way to "untar" correctly this file with an appropriate option ?
is it a bug ? is the program applying permissions at the right time ?

thank in advance for you answer,

yours sincerely,

Melon Laurent
University of Liege,
Computer network departement

xx.tar
Description: Text document