如何在 Yocto 中更改文件所有权

Question

I need to change file ownership in Yocto. I have a recipe that creates a directory. To create a new group and user I added in my image.bbappend:

inherit extrausers  
EXTRA_USERS_PARAMS = " groupadd new_group; \
                       useradd  -g new_group -p '' new_user; \
                       usermod -a -G new_group root \
                     "

To add a new directory to my image I added to some_recipe.bbappend:

FILES_${PN} = "/dir1/dir2"
do_install_append() {
    install -d ${D}/dir1/dir2
}

When I try to use chown -R my_group.my_user /dir1/dir2 in the above do_install_append() task I get an error that such group and user does't exist. So next, I tried to add the above three lines to image.bbappend file. I get no errors from bitbake but in the final image directory is still own by root.

Answer 1

Try adding this in your .bbappend file:

pkg_postinst_${PN}{
    chown -R user:group /dir1/dir2
}

I think that the problem is that you are trying to change the ownership of the file before Yocto has created the user.