[LightDM] Setting environment variables the correct way for lightdm/XFCE4

[Robert Ancell]

What OS are you using? The pam_env module should bring all the variables
from /etc/environment into a user session.

See /etc/pam.d/lightdm to check if it is configured like that.

On Fri, 5 Feb 2016 at 09:44 OmegaPhil <OmegaPhil at startmail.com> wrote:

> I currently need to set LD_PRELOAD systemwide in order to work around an
> aufs kernel memory allocation problem - '/etc/environment' LD_PRELOAD is
> obeyed by shells launched outside a GUI, however anything launched
> through lightdm doesn't get this. I can add the export to '~/.bashrc',
> however I need it also present for any GUI program launched from the X
> session.
>
> Fiddling with '/etc/profile.d/' scripts and adding it to lightdm's
> init.d script didn't work, looking through lightdm's source (e.g.
> seat.c) suggests it gets stripped unless LIGHTDM_TEST_ROOT is set,
> however setting this in '/etc/environment' or in the init.d script still
> doesn't cause LD_PRELOAD to be honoured.
>
> The only thing that 'works' is adding the exports to
> '/etc/xdg/xfce4/xinitrc', just above the '# run xfce4-session if
> installed' block.
>
> Is there a recommended way (other than this) for a sysadmin to set
> LD_PRELOAD that is respected by lightdm/XFCE4/etc?
>
> Thanks for any help
>
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