[yocto] preserving file owners in do_package

[Davide Soldan]

Hi to all,
in my recipe I want to change owner and permission of a file, so I wrote:

do_install() {
        ls -la ${D}/opt/user
        chown -R user ${D}/opt/user
        chgrp -R user ${D}/opt/user
        ls -la ${D}/opt/user
        chmod 754 ${D}/opt/user/user.sh
        ls -la ${D}/opt/user
}

the output of ls commands is: 

drwxr-xr-x 8 root root   4096 Oct 15 11:13 .
drwxr-xr-x 3 root root   4096 Oct 15 11:13 ..
-rw-r--r-- 1 *root root*  55753 Aug  2 08:48 user.sh

drwxr-xr-x 8 user user   4096 Oct 15 11:13 .
drwxr-xr-x 3 root     root       4096 Oct 15 11:13 ..
-rw-r--r-- 1 *user user*  55753 Aug  2 08:48 user.sh

drwxr-xr-x 8 user user   4096 Oct 15 11:13 .
drwxr-xr-x 3 root     root       4096 Oct 15 11:13 ..
*-rwxr-xr--* 1 user user  55753 Aug  2 08:48 user.sh

So the change of owner and permission works fine in do_install phase.
Opening the final rootfs tarball, however, the file user.sh has still 754 permission but root as owner...so do_package doesn't preserve owner change done in do_install? Or maybe I'm doing something wrong in changing file owner? Any ideas?
Thanks to all!
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