[yocto] [OE-core] FILESYSTEM_PERMS_TABLE / fs-perms.txt

[madoga]

> On 12/5/18 11:12 AM, madoga wrote:
>
> > Hello List,
> > I am trying to configure my entire filesystem by using FILESYSTEM_PERMS_TABLES
> > variable pointing to my custom fs-perms.txt, but it does not work. While I
> > debugged package.bbclass looking for any error or failure, I found something
> > strange with os.chmod & os.lchown methods (at function fix_perms):
> > # Fix the permission, owner and group of path
> > def fix_perms(path, mode, uid, gid, dir):
> > if mode and not os.path.islink(path):
> > #bb.note("Fixup Perms: chmod 0%o %s" % (mode, dir))
> > os.chmod(path, mode)
> > # -1 is a special value that means don't change the uid/gid
> > # if they are BOTH -1, don't bother to lchown
> > if not (uid == -1 and gid == -1):
> > #bb.note("Fixup Perms: lchown %d:%d %s" % (uid, gid, dir))
> > os.lchown(path, uid, gid)
> > I have hardcoded mode variable to “0333”, just for testing: os.chmod(path,
> > 0o333)and I have seen that permissions were been configured into a “0711”. Also
> > I am going to ask about os.lchown, due to my filesystem is still been owned by
> > my user and my group.
> > Does anyone have an idea about what is going on? Has somebody have the same
> > problem?
>
> The commands run under the pseudo environment. Pseudo captures these commands
> and stores them in a database it can 'replay' at any time.
>
> It only make them in the actual filesystem if permitted by the host.
>
> You must look at the filesystem results in the live system (running pseudo) or
> in the results of the build -- otherwise what you are looking at is not valid.
>
> (BTW this is the reason that the commended code was left in that function. In
> case something is wrong, just remove the comments and you'll get notes on what
> it is doing to help debug. This shouldn't be necessary unless you are
> developing the function itself.. but that is why they are there.)
>

Thank you for your reply Mark!
Does the pseudo environment allow to set the entire rootfs by using fakeroot? Perhaps this is not the right way to make it, I am not pretty sure about that. I would like to obtain my rfs with a concrete permissions when bitbake finishes, folders, executables... Is there another/better way to accomplish?

About debbuging bb.notes, I have already removed the comments and everything seems working OK.

Best Regards,
Mario

> --Mark
>
> > Thank you
> > Best Regards,
> > Mario