Re: [gdm-list] PostLogin $HOME is not doing anything

[Brian Cameron <brian cameron oracle com>]

Note that any environment variables set in the PreSession/PostSession
/PostLogin/Init scripts are not persistent.  They only are set for the
time that the script runs.  In other words, you cannot reset environment
variables like $HOME or $USER in these scripts.

If you want to setup the user's $HOME directory in a unique fashion,
I believe you need to use a custom PAM module that does this.  The
following website is for solving a slightly different problem, but
shows the general technique:

  http://danwalsh.livejournal.com/13376.html?thread=109120

On 04/ 6/11 12:54 AM, fuzzy sunshine wrote:
> Hi there,
>
> I'm trying to create a random directory, set the current sessions home
> directory to it, copy the default profile to it and then make sure
> proper ownership is set.  I am trying to create a public terminal kiosk
> where the autologin is the same via XDMCP.  I have created a Default
> script for PostLogin, which works except after it runs on Login the
> session is still on the original home directory.
>
>   A quote from
> http://library.gnome.org/admin/gdm/stable/configuration.html.en
>
>     After the user has been successfully authenticated GDM will run the
>     PostLogin script. This is done before any session setup has been
>     done, including before the pam_open_session call. This script is
>     useful for doing any session initialization that needs to happen
>     before the session starts. For example, you might setup the user's
>     $HOME directory if needed.

The PreSession/PostSession scripts can be useful for re-creating the
user's $HOME directory on each login.  However, as I say above, you
cannot change the environment variables in these scripts.

Brian


> So I created this:
>
>   #!/bin/bash
> #
> # Note: this is a sample and will not be run as is.  Change the name of this
> # file to <gdmconfdir>/PostLogin/Default for this script to be run.  This
> # script will be run before any setup is run on behalf of the user and is
> # useful if you for example need to do some setup to create a home directory
> # for the user or something like that.  $HOME, $LOGIN and such will all be
> # set appropriately and this script is run as root.
> env > /tmp/aaa
> if [ $USER == "google-chrome" ]
>          then
>          echo "Inside Loop" >> /tmp/aaa
>          export HOME=/home/google-chrome-`date +%N | md5sum | awk '{
> print \$1; }'`
>          rsync -avz /home/google-chrome/* $HOME
>          chown -R google-chrome:google-chrome $HOME
>          env >> /tmp/aaa
>          fi
>
> -----
>
> Which I would have expected to have done what I needed but after this is
> ran the login still reverts back to the original home directory.  If I
> use usermod -d $HOME google-chrome here as well I still end up with the
> original home directory.  Could someone please shed some light on how to
> do this.  I can figure out how to check for duplicates later and how to
> remove stale ones at the end of the day, but I need to get the session
> to listen to me first.
>
> /tmp/aaa:
>
> fuzzy@wifi-term:/etc/gdm3/PreSession$ cat /tmp/aaa
> SHELL=/bin/bash
> USER=google-chrome
> X_SERVERS=/var/lib/gdm3/:12.Xservers
> USERNAME=google-chrome
> PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
> PWD=/var/lib/gdm3
> GDM_PARENT_DISPLAY=:0
> SHLVL=1
> HOME=/home/google-chrome
> GDM_PARENT_XAUTHORITY=/var/run/gdm3/auth-for-fuzzy-a8PRo9/database
> LOGNAME=google-chrome
> DISPLAY=:12
> RUNNING_UNDER_GDM=true
> XAUTHORITY=/var/run/gdm3/auth-for-Debian-gdm-nGxNR1/database
> _=/usr/bin/env
> Inside Loop
> SHELL=/bin/bash
> USER=google-chrome
> X_SERVERS=/var/lib/gdm3/:12.Xservers
> USERNAME=google-chrome
> PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
> PWD=/var/lib/gdm3
> GDM_PARENT_DISPLAY=:0
> SHLVL=1
> HOME=/home/google-chrome-60d0c68156f857b1a2e02f701bb029b2
> GDM_PARENT_XAUTHORITY=/var/run/gdm3/auth-for-fuzzy-a8PRo9/database
> LOGNAME=google-chrome
> DISPLAY=:12
> RUNNING_UNDER_GDM=true
> XAUTHORITY=/var/run/gdm3/auth-for-Debian-gdm-nGxNR1/database
> _=/usr/bin/env
>
>
>
>
>
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