Tar update or append

[Philippe Frossard]

Hi,
Impossible to update a file in an archive,
Example :

C:\Data\Philippe\PROJET\Software\>tar -cvf test.tar cnx
cnx/
cnx/etc/
cnx/etc/conf.d/
cnx/etc/conf.d/net.eth0
cnx/etc/conf.d/net.eth1

I modify the file net.eth0 ...

C:\Data\Philippe\PROJET\Software\>tar -uvf test.tar cnx/etc/conf.d/net.eth0
cnx/etc/conf.d/net.eth0

or

C:\Data\Philippe\PROJET\Software\>tar -rvf test.tar cnx/etc/conf.d/net.eth0
cnx/etc/conf.d/net.eth0

And, the file in the archive is not correct !?
Thanks.

--
Philippe FROSSARD