On Tue, Apr 03, 2012 at 08:13:46PM +0100, Ken Moffat wrote:
> On Tue, Apr 03, 2012 at 07:51:52PM +0100, Ken Moffat wrote:
> > > >
> > > > 1.2 I suppose we could stress that anyone not building in /usr &&
> > > > /etc needs to provide symlinks in /etc/xdg if they want to use gdm ?
>
> Actually, it might be that XDG_CONFIG_DIRS (and XDG_DATA_DIRS) are
> not being picked up. According to an ubuntu bug, the gnome xsession
> reads them via /etc/profile and, perhaps, a user's profile. I
> suspect the glue to pick up /etc/profile is not in place. Will need
> to go back to the other box to take a look and play with it some
> more :-(
>
There is good news, and there is bad news.
First, the good news. /usr/sbin/gdm is a wrapper script and it can
be inspected to see that it does indeed source /etc/profile, where
XDG_DATA_DIRS and XDG_CONFIG_DIRS are set. It's the CONFIG DIRS
that supply the sysconfdir.
Second, the bad news. By placing some spoof values into these
directories in /etc/profile, I can see that gnome-session invokes or
uses GsmUtils for some of these spoof directories. For the DATA
DIRS I prepended /opt/fubar/share and that is indeed checked. For
the CONFIG DIRS I prepended both /opt/fubar/etc/xdg and
/etc/gnome/xdg (ahead of /etc/xdg) - neither is mentioned and I
can't get to a desktop login.
So, it's gnome-shell that is doing this and failing to find
gnome-settings-daemon when I try to run gdm. If I put the
directories in .xinitrc and use startx then everything is found.
So, I think its probably a misfeature, to be worked around by
symlinks if gnome-settings-daemon.desktop is not in an expected
place and not in a $PREFIX/share directory. I suppose that it could
also be worked around by, in gnome-settings-daemon, using
--sysconfdir=${GNOME_PREFIX}/share/gnome and adding that to the
XDG_DATA_DIRS (untested), but that is too ugly (need to add the
/usr/share/gnome directory to the existing /usr/share), and likely
to break if something else in gnome-session is added which also uses
sysconfdir. I'll go with the symlinks.
ĸen
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