Re: Bug#610749: fakeroot fails ownership with kfreebsd systems

[Petr Salinger <Petr.Salinger@seznam.cz>]

> reassign 610749 eglibc
> severity 610749 serious
> thanks

> > The problems is triggered by the new version of tar that is present only
> > in sid, squeeze is not affected. However given the packages are built in
> > a sid chroot, we might be in trouble, especially given the package has
> > been uploaded almost 50 days ago...
>
> Ok, I have finally understood the problem:
> 1) in eglibc we implement at* functions, but mark them as stub as the
>   emulation for FreeBSD 7.x kernels is not perfect. FreeBSD 8.x have
>   this syscalls natively, and thus don't need emulation.
> 2) newer versions of tar start to use the fstatat syscall.
> 3) fakeroot doesn't emulate this syscall because it is marked as stub
>   in eglibc.
>
> Even if testing is not affected, it's a serious problem as packages are
> in unstable before moving to testing. This is way we have roughly 300
> broken binary packages in the archive.
>
> Therefore I think it should be fixed as soon as possible. IMHO the best
> way to fix that is to remove the stub for at* functions as we don't want
> to support 7.x kernel anymore.

This fix is long-term-fix. But I do not agree to do it now, for squeeze 
glibc. The other packages behaviour/code_path might be altered by this 
change significantly.

Better would be to override *at stubs only for fakeroot now.

Something like add in fakeroot's configure/configure.ac after
AC_CHECK_FUNCS(fchmodat fchownat fstatat mkdirat mknodat openat renameat unlinkat)

-------------
case $target_os in
        kfreebsd*)
        for ac_func in fchmodat fchownat fstatat mkdirat mknodat openat renameat unlinkat
        do
          cat >>confdefs.h << _ACEOF
#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
_ACEOF
        done
        ;;
esac
-------------


The change in eglibc should be synced with 2.12 (2.13) upload.

Petr