[yocto] preserving file owners in do_package

[Paul Eggleton]

Hi Davide,

On Friday 18 October 2013 15:31:22 Davide Soldan wrote:
> In data martedì 15 ottobre 2013 17:18:35, Paul Eggleton ha scritto:
> > On Tuesday 15 October 2013 18:12:42 Davide Soldan wrote:
> > > In data martedì 15 ottobre 2013 11:38:21, Paul Eggleton ha scritto:
> > > > On Tuesday 15 October 2013 12:02:20 Davide Soldan wrote:
> > > > > 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 ${D}/opt/user
> > > > > 
> > > > > }
> > > > > 
> > > > > the output of ls commands is:
> > > > > 
> > > > > drwxr-xr-x 8 root root   4096 Oct 15 11:13 .
> > > > > drwxr-xr-x 3 root root   4096 Oct 15 11:13 ..
> > > > > -rw-r--r-- 1 *root root*  55753 Aug  2 08:48 user.sh
> > > > > 
> > > > > drwxr-xr-x 8 user user   4096 Oct 15 11:13 .
> > > > > drwxr-xr-x 3 root     root       4096 Oct 15 11:13 ..
> > > > > -rw-r--r-- 1 *user user*  55753 Aug  2 08:48 user.sh
> > > > > 
> > > > > drwxr-xr-x 8 user user   4096 Oct 15 11:13 .
> > > > > drwxr-xr-x 3 root     root       4096 Oct 15 11:13 ..
> > > > > *-rwxr-xr--* 1 user user  55753 Aug  2 08:48 user.sh
> > > > > 
> > > > > So the change of owner and permission works fine in do_install
> > > > > phase.
> > > > > Opening the final rootfs tarball, however, the file user.sh has
> > > > > still
> > > > > 754
> > > > > permission but root as owner...so do_package doesn't preserve owner
> > > > > change
> > > > > done in do_install? Or maybe I'm doing something wrong in changing
> > > > > file
> > > > > owner? Any ideas? Thanks to all!
> > > > 
> > > > Does your recipe create the specified user via useradd.bbclass?
> > > 
> > > I solved with a postinstall script (that run at boot):
> > > 
> > > pkg_postinst_${PN}() {
> > > 
> > >         #!/bin/sh -e
> > >         if [ x"$D" = "x" ]; then
> > >         
> > >           chown -R user /opt/user
> > >           chgrp -R user /opt/user
> > >         
> > >         else
> > >         
> > >           exit 1
> > >         
> > >         fi
> > > 
> > > }
> > 
> > This shouldn't be necessary though. I honestly can't tell you why it
> > doesn't work as specified. I think it might be worth filing a bug for
> > this.
> > 
> > Cheers,
> > Paul
> 
> I'm so sorry Paul, but my mail client missed your last email and so I filed
> a bug uselessly... I tried, as you suggested, to add the package that
> create the user to the RDEPENDS_${PN} removing the postinstall scripi. That
> worked setting the right owner with chown/chgrp in do_install... Thank you
> so much. I very sorry for the useless bug opened...can I close it by
> myself?

I've marked it resolved. No problem about filing it, at least it's now there 
for reference if anyone hits the same situation :)

I think it's fair to say we need to look at how to better document all of this 
stuff in the manual. We could probably afford to dedicate a small section on how 
to deal with adding/modifying users and file ownership. Scott, could you add 
this to your todo list?

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre