branch: dora
commit id (meta-yocto): 56f39bcf2237c11508d82238b6292e4bfbfed764
          (meta-fsl-arm): 00f0cf377224829f450d99bdc4664ffe96623996
          (meta-fsl-arm-extra): 12af63db7719877fd191ed2aa921a455a04f677b
          (meta-fsl-demos): 393b0119d513f9abf7b0570ab0d32b81583dedca

Hi,
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 not user as owner...

The only workaround found to change file ownership is to run a postinstall script at board boot:

pkg_postinst_${PN}() {
        #!/bin/sh -e
        if [ x"$D" = "x" ]; then
          chown -R user /opt/user
          chgrp -R user /opt/user
        else
          exit 1
        fi
}